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LP2950, LP2951, NCV2951 100 mA, Low Power Low Dropout Voltage Regulator
The LP2950 and LP2951 are micropower voltage regulators that are specifically designed to maintain proper regulation with an extremely low input-to-output voltage differential. These devices feature a very low quiescent bias current of 75 mA and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided. The LP2951 has three additional features. The first is the Error Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor power-on reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 3.0 V output (depending on the version) or programmed from 1.25 V to 29 V. It consists of a pinned out resistor divider along with direct access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turn-off or turn-on the regulator output. Due to the low input-to-output voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of useful battery life is desirable. The LP2950 is available in the three pin case 29 and DPAK packages, and the LP2951 is available in the eight pin dual-in-line, SOIC-8 and Micro8 surface mount packages. The `A' suffix devices feature an initial output voltage tolerance 0.5%.
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TO-92 Z SUFFIX CASE 29 1 23
Pin: 1. Output 2. Ground 3. Input 4 12 3
DPAK DT SUFFIX CASE 369C
PIN CONNECTIONS
Pin: 1. Input 2. Ground 3. Output
1
2
3
(Top View) Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. SOIC-8 D SUFFIX CASE 751 PDIP-8 N SUFFIX CASE 626 Micro8E DM SUFFIX CASE 846A
* Pb-Free Packages are Available * Low Quiescent Bias Current of 75 mA * Low Input-to-Output Voltage Differential of 50 mV at 100 mA and * * * * *
380 mV at 100 mA 5.0 V, 3.3 V or 3.0 V 0.5% Allows Use as a Regulator or Reference Extremely Tight Line and Load Regulation Requires Only a 1.0 mF Output Capacitor for Stability Internal Current and Thermal Limiting NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
8 1
8 1 8 1
PIN CONNECTIONS
Output 1 Sense 2 Shutdown 3 GND 4 (Top View) 8 7 6 5 Input Feedback VO Tap Error Output
LP2951 Additional Features
* Error Output Signals an Out of Regulation Condition * Output Programmable from 1.25 V to 29 V * Logic Level Shutdown Input
(See Following Page for Device Information.)
ORDERING & MARKING INFORMATION
See detailed ordering and shipping information in the package dimensions section on pages 14 and 16 of this data sheet. See general marking information in the device marking section on page 18 of this data sheet.
(c) Semiconductor Components Industries, LLC, 2006
1
December, 2006 - Rev. 19
Publication Order Number: LP2950/D
LP2950, LP2951, NCV2951
DEVICE INFORMATION
Output Voltage Package TO-92 Suffix Z DPAK Suffix DT SOIC-8 SOIC-8 Suffix D Micro8 Suffix DM DIP-8 Suffix N 3.0 V LP2950CZ-3.0 LP2950ACZ-3.0 LP2950CDT-3.0 LP2950ACDT-3.0 - LP2951CD-3.0 LP2951ACD-3.0 LP2951CDM-3.0 LP2951ACDM-3.0 LP2951CN-3.0 LP2951ACN-3.0 3.3 V LP2950CZ-3.3 LP2950ACZ-3.3 LP2950CDT-3.3 LP2950ACDT-3.3 NCV2951ACD-3.3R2 LP2951CD-3.3 LP2951ACD-3.3 LP2951CDM-3.3 LP2951ACDM-3.3 LP2951CN-3.3 LP2951ACN-3.3 5.0 V LP2950CZ-5.0 LP2950ACZ-5.0 LP2950CDT-5.0 LP2950ACDT-5.0 NCV2951ACDR2 LP2951CD LP2951ACD LP2951CDM LP2951ACDM LP2951CN LP2951ACN Adjustable Not Available Not Available NCV2951CDR2 LP2951CD LP2951ACD LP2951CDM LP2951ACDM LP2951CN LP2951ACN Operating Ambient Temperature Range TA = -40 to +125C TA = -40 to +125C TA = -40 to +125C TA = -40 to +125C TA = -40 to +125C TA = -40 to +125C
LP2950Cx-xx / LP2951Cxx-xx LP2950ACx-xx / LP2951ACxx-xx
1% Output Voltage Precision at TA = 25C 0.5% Output Voltage Precision at TA = 25C
Input Battery or Unregulated DC 3 182 k Error Amplifier 1.23 V Reference GND 2
Output 1
5.0 V/100 mA 1.0 mF
60 k LP2950CZ-5.0
Battery or Unregulated DC
Input
8
Output
1
Sense 182 k
2
5.0 V/100 mA 1.0 mF VO Tap 6
60 k 7 Error Amplifier 60 k 50 k 75 mV/ 60 mV Feedback 330 k
Shutdown From 3 CMOS/TTL
Error Output 5
To CMOS/TTL
1.23 V Reference GND 4
Error Detection Comparator
LP2951CD or CN
This device contains 34 active transistors.
Figure 1. Representative Block Diagrams
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LP2950, LP2951, NCV2951
MAXIMUM RATINGS (TA = 25C, unless otherwise noted.)
Rating Input Voltage Peak Transient Input Voltage (t < 20 ms) Power Dissipation and Thermal Characteristics Maximum Power Dissipation Case 751(SOIC-8) D Suffix Symbol VCC VCC PD Value 30 32 Unit Vdc Vdc
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA
Internally Limited 180 45 92 6.0 160 83 105 240 -1.5 to +30 -0.3 to +30 -0.3 to +30 -40 to +125 +150 -65 to +150 W Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Case 369A (DPAK) DT Suffix (Note 1) Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Case 29 (TO-226AA/TO-92) Z Suffix Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case Case 626 N Suffix Thermal Resistance, Junction-to-Ambient Case 846A (Micro8) DM Suffix Thermal Resistance, Junction-to-Ambient Feedback Input Voltage Shutdown Input Voltage Error Comparator Output Voltage Operating Ambient Temperature Range Maximum Die Junction Temperature Range Storage Temperature Range RqJA Vfb Vsd Verr TA TJ Tstg C/W Vdc Vdc Vdc C C C RqJA C/W RqJA RqJC C/W C/W RqJA RqJC C/W C/W RqJA C/W C/W RqJC Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
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LP2950, LP2951, NCV2951
ELECTRICAL CHARACTERISTICS (Vin = VO + 1.0 V, IO = 100 mA, CO = 1.0 mF, TA = 25C [Note 3],
unless otherwise noted.) Characteristic Output Voltage, 5.0 V Versions Vin = 6.0 V, IO = 100 mA, TA = 25C LP2950C-5.0/LP2951C/NCV2951C* LP2950AC-5.0/LP2951AC/NCV2951AC* TA = - 40 to +125C LP2950C-5.0/LP2951C/NCV2951C* LP2950AC-5.0/LP2951AC/NCV2951AC* Vin = 6.0 to 30 V, IO = 100 mA to 100 mA, TA = - 40 to +125C LP2950C-5.0/LP2951C/NCV2951C* LP2950AC-5.0/LP2951AC/NCV2951AC* Output Voltage, 3.3 V Versions Vin = 4.3 V, IO = 100 mA, TA = 25C LP2950C-3.3/LP2951C-3.3 LP2950AC-3.3/LP2951AC-3.3/NCV2951AC-3.3* TA = - 40 to +125C LP2950C-3.3/LP2951C-3.3 LP2950AC-3.3/LP2951AC-3.3/NCV2951AC-3.3* Vin = 4.3 to 30 V, IO = 100 mA to 100 mA, TA = - 40 to +125C LP2950C-3.3/LP2951C-3.3 LP2950AC-3.3/LP2951AC-3.3/NCV2951AC-3.3* Output Voltage, 3.0 V Versions Vin = 4.0 V, IO = 100 mA, TA = 25C LP2950C-3.0/LP2951C-3.0 LP2950AC-3.0/LP2951AC-3.0 TA = - 40 to +125C LP2950C-3.0/LP2951C-3.0 LP2950AC-3.0/LP2951AC-3.0 Vin = 4.0 to 30 V, IO = 100 mA to 100 mA, TA = - 40 to +125C LP2950C-3.0/LP2951C-3.0 2.928 - 3.072 3.042 LP2950AC-3.0/LP2951AC-3.0 2.958 - 1. The Junction-to-Ambient Thermal Resistance is determined by PCB copper area per Figure 29. 2. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM), 2000 V, Class 2, JESD22 A114-C Machine Model (MM), 200 V, Class B, JESD22 A115-A Charged Device Model (CDM), 2000 V, Class IV, JESD22 C101-C 3. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 4. VO(nom) is the part number voltage option. 5. Noise tests on the LP2951 are made with a 0.01 mF capacitor connected across Pins 7 and 1. *NCV prefix is for automotive and other applications requiring site and change control. 2.940 2.964 - - 3.060 3.036 2.970 2.985 3.000 3.000 3.030 3.015 VO 3.221 3.254 - - 3.379 3.346 V 3.234 3.260 - - 3.366 3.340 3.267 3.284 3.300 3.300 3.333 3.317 VO 4.880 4.925 - - 5.120 5.075 V 4.900 4.940 - - 5.100 5.060 4.950 4.975 5.000 5.000 5.050 5.025 Symbol VO Min Typ Max Unit V
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LP2950, LP2951, NCV2951
ELECTRICAL CHARACTERISTICS (continued) (Vin = VO + 1.0 V, IO = 100 mA, CO = 1.0 mF, TA = 25C [Note 8],
unless otherwise noted.) Characteristic Line Regulation (Vin = VO(nom) +1.0 V to 30 V) (Note 9) LP2950C-XX/LP2951C/LP2951C-XX/NCV2951C* LP2950AC-XX/LP2951AC/LP2951AC-XX/NCV2951AC* Load Regulation (IO = 100 mA to 100 mA) LP2950C-XX/LP2951C/LP2951C-XX/NCV2951C* LP2950AC-XX/LP2951AC/LP2951AC-XX/NCV2951AC* Dropout Voltage IO = 100 mA IO = 100 mA Supply Bias Current IO = 100 mA IO = 100 mA Dropout Supply Bias Current (Vin = VO(nom) - 0.5 V, IO = 100 mA) (Note 9) Current Limit (VO Shorted to Ground) Thermal Regulation Output Noise Voltage (10 Hz to 100 kHz) (Note 10) CL = 1.0 mF CL = 100 mF LP2951A/LP2951AC Only Reference Voltage (TA = 25C) LP2951C/LP2951C-XX/NCV2951C* LP2951AC/LP2951AC-XX/NCV2951AC* Reference Voltage (TA = - 40 to +125C) LP2951C/LP2951C-XX/NCV2951C* LP2951AC/LP2951AC-XX/NCV2951AC* Reference Voltage (TA = - 40 to +125C) IO = 100 mA to 100 mA, Vin = 23 to 30 V LP2951C/LP2951C-XX/NCV2951C* LP2951AC/LP2951AC-XX/NCV2951AC* Feedback Pin Bias Current Error Comparator Output Leakage Current (VOH = 30 V) Output Low Voltage (Vin = 4.5 V, IOL = 400 mA) Upper Threshold Voltage (Vin = 6.0 V) Lower Threshold Voltage (Vin = 6.0 V) Hysteresis (Vin = 6.0 V) Shutdown Input Input Logic Voltage Logic "0" (Regulator "On") Logic "1" (Regulator "Off") Shutdown Pin Input Current Vshtdn = 2.4 V Vshtdn = 30 V Regulator Output Current in Shutdown Mode (Vin = 30 V, Vshtdn = 2.0 V, VO = 0, Pin 6 Connected to Pin 7) Vshtdn 0 2.0 Ishtdn - - Ioff - 35 450 3.0 50 600 10 mA - - 0.7 30 mA V Ilkg VOL Vthu Vthl Vhy - - 40 - - 0.01 150 45 60 15 1.0 250 - 95 - mA mV mV mV mV Vref 1.210 1.220 Vref 1.200 1.200 Vref 1.185 1.190 IFB - - - 15 1.285 1.270 40 nA - - 1.270 1.260 V 1.235 1.235 1.260 1.250 V V Symbol Regline - - Regload - - VI - VO - - ICC - - ICCdropout ILimit Regthermal Vn - - 126 56 - - - - - 93 4.0 110 220 0.05 120 12 170 300 0.20 mA mA mA mA %/W mVrms 30 350 80 450 0.13 0.05 0.20 0.10 mV 0.08 0.04 0.20 0.10 % Min Typ Max Unit %
6. The Junction-to-Ambient Thermal Resistance is determined by PCB copper area per Figure 29. 7. ESD data available upon request. 8. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 9. VO(nom) is the part number voltage option. 10. Noise tests on the LP2951 are made with a 0.01 mF capacitor connected across Pins 7 and 1. *NCV prefix is for automotive and other applications requiring site and change control.
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LP2950, LP2951, NCV2951
DEFINITIONS Dropout Voltage - The input/output voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 100 mV below its nominal value (which is measured at 1.0 V differential), dropout voltage is affected by junction temperature, load current and minimum input supply requirements. Line Regulation - The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Load Regulation - The change in output voltage for a change in load current at constant chip temperature. Maximum Power Dissipation - The maximum total device dissipation for which the regulator will operate within specifications. Bias Current - Current which is used to operate the regulator chip and is not delivered to the load.
10 LP2950/LP2951 BIAS CURRENT (mA)
Output Noise Voltage - The RMS ac voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Leakage Current - Current drawn through a bipolar transistor collector-base junction, under a specified collector voltage, when the transistor is "off". Upper Threshold Voltage - Voltage applied to the comparator input terminal, below the reference voltage which is applied to the other comparator input terminal, which causes the comparator output to change state from a logic "0" to "1". Lower Threshold Voltage - Voltage applied to the comparator input terminal, below the reference voltage which is applied to the other comparator input terminal, which causes the comparator output to change state from a logic "1" to "0". Hysteresis - The difference between Lower Threshold voltage and Upper Threshold voltage.
6.0 5.0 Vout , OUTPUT VOLTAGE (V) LP2951C TA = 25C RL = 50 kW RL = 50 W
1.0
4.0 3.0 2.0 1.0 0
0.1
0.01 0.1
1.0
10
100
0
1.0
2.0
3.0
4.0
5.0
6.0
IL, LOAD CURRENT (mA)
Vin, INPUT VOLTAGE (V)
Figure 2. Quiescent Current
Figure 3. 5.0 V Dropout Characteristics over Load
5.00 Vout , OUTPUT VOLTAGE (V) Vout , OUTPUT VOLTAGE (V) 4.99 4.98 4.97 4.96 LP2951C 4.95 - 50
6.0 LP2951C 5.0 4.0 3.0 2.0 25C 1.0 125C 0 0 50 100 150 200 0 1.0 TA, AMBIENT TEMPERATURE (C) -40C 2.0 3.0 4.0 5.0 6.0
Vin, INPUT VOLTAGE (V)
Figure 4. Output Voltage versus Temperature
Figure 5. 5.0 V Dropout Characteristics with RL = 50 W
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LP2950, LP2951, NCV2951
250 200 BIAS CURRENT ( A) 0.1 mA Load Current 150 100 No Load 50 0 0 5.0 10 15 20 25 Vin, INPUT VOLTAGE (V) DROPOUT VOLTAGE (mV) 400 350 300 250 200 150 100 50 0 0.1 1.0 10 100 TA = 25C
IO, OUTPUT CURRENT (mA)
Figure 6. Input Current
Figure 7. Dropout Voltage versus Output Current
550 DROPOUT VOLTAGE (mV)R L= 50 500 450 400 350 300 - 50
55 DROPOUT VOLTAGE (mV)R L= 50 k 50 45 40 35 30 150 Vout , OUTPUT VOLTAGE (V)
5.0 4.0 3.0 2.0 1.0 0 4.70 LP2951C RL = 330 k TA = 25C Vin Decreasing Vin Increasing
RL = 50
RL = 50 k 0 50 T, TEMPERATURE (C) 100
4.74
4.78
4.82
4.86
4.90
Vin, INPUT VOLTAGE (V)
Figure 8. Dropout Voltage versus Temperature
Figure 9. Error Comparator Output
SHUTDOWN AND OUTPUT VOLTAGE (V)
8.0 7.5 7.0 6.5 6.0 5.5
OUTPUT VOLTAGE CHANGE (mV)
Vin
4.0 2.0 0 - 2.0
7.0 6.0 5.0 4.0 3.0 2.0 1.0
CL = 1.0 mF
Vin , INPUT VOLTAGE (V)
Vout
CL = 10 mF TA = 25C IL = 10 mA Vin = 8.0 V Vout = 5.0 V
TA = 25C CL = 1.0 mF IL = 1.0 mA VO = 5.0 V 0 100 200 300 400 t, TIME (ms) 500 600 700
- 4.0 - 6.0 800
Shutdown Input 0 0 100 200
-1.0 -100
300
400
t, TIME (ms)
Figure 10. Line Transient Response
Figure 11. LP2951 Enable Transient
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LP2950, LP2951, NCV2951
200 400 200 0 50 0 - 50 ILoad - 200 - 400 0 0.5 1 1.5 2 t, TIME (ms) 2.5 3 3.5 4 0 1.0 150 100 OUTPUT VOLTAGE CHANGE (mV) CL = 1.0 mF Vout = 5.0 V IL = 400 mA to 75 mA TA = 25C 80
RIPPLE REJECTION (dB)
LOAD CURRENT (mA)
60 IL= 0.1 mA 40 TA = 25C CL = 1.0 mF Vin = 6.0 V Vout = 5.0 V 10 100 1.0 k 10 k 100 k
Vout
20
f, FREQUENCY (Hz)
Figure 12. Load Transient Response
Figure 13. Ripple Rejection
VOLTAGE NOISE ( V/ Hz)
CL = 1.0 mF 3.0
IL= 100 mA TA = 25C VO = 5.0 V LP2951C
SHUTDOWN THRESHOLD VOLTAGE (V)
4.0
1.8 1.6 1.4 1.2 1.0 0.8 - 40 - 20 Output Off" Output On"
2.0
1.0
CL = 100 mF
0 100
1.0 k
10 k
100 k
0
20
40
60
80
100
120
140
160
f, FREQUENCY (Hz)
t, TEMPERATURE (C)
Figure 14. Output Noise
Figure 15. Shutdown Threshold Voltage versus Temperature
100 Vout , OUTPUT CURRENT (mA) 80 60 40 20 LP2951CN 0 0 5.0 10 15 20 25 30 35 TA = 25C TA = 75C
4.0 2.0 0 - 2.0 - 4.0 - 6.0 40
10000 OUTPUT VOLTAGE CHANGE (mV) ESR (ohms) Vout = 5 V 1000 100 10 1 0.1 Unstable Region Stable Region 100 mF 0.1 mF
Unstable Region for 0.1 mF capacitor only Lower unstable region is for 0.1 mF only. 1 mF and 100 mF show no instability with low ESR values. 0 10 20 30 40 50 60 70 80 90 100 Output Current (mA)
0.01
Vin, INPUT VOLTAGE (V)
Figure 16. Maximum Rated Output Current
Figure 17. Output Stability versus Output Capacitor Change
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LP2950, LP2951, NCV2951
APPLICATIONS INFORMATION
Introduction
The LP2950/LP2951 regulators are designed with internal current limiting and thermal shutdown making them user-friendly. Typical application circuits for the LP2950 and LP2951 are shown in Figures 20 through 28. These regulators are not internally compensated and thus require a 1.0 mF (or greater) capacitance between the LP2950/LP2951 output terminal and ground for stability. Most types of aluminum, tantalum or multilayer ceramic will perform adequately. Solid tantalums or appropriate multilayer ceramic capacitors are recommended for operation below 25C. At lower values of output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.33 mF for currents less than 10 mA, or 0.1 mF for currents below 1.0 mA. Using the 8 pin versions at voltages less than 5.0 V operates the error amplifier at lower values of gain, so that more output capacitance is needed for stability. For the worst case operating condition of a 100 mA load at 1.23 V output (output Pin 1 connected to the feedback Pin 7) a minimum capacitance of 3.3 mF is recommended. The LP2950 will remain stable and in regulation when operated with no output load. When setting the output voltage of the LP2951 with external resistors, the resistance values should be chosen to draw a minimum of 1.0 mA. A bypass capacitor is recommended across the LP2950/LP2951 input to ground if more than 4 inches of wire connects the input to either a battery or power supply filter capacitor. Input capacitance at the LP2951 Feedback Pin 7 can create a pole, causing instability if high value external resistors are used to set the output voltage. Adding a 100 pF capacitor between the Output Pin 1 and the Feedback Pin 7 and increasing the output filter capacitor to at least 3.3 mF will stabilize the feedback loop.
Error Detection Comparator
to the LP2951 is ramped up and down. The ERROR signal becomes valid (low) at about 1.3 V input. It goes high when the input reaches about 5.0 V (Vout exceeds about 4.75 V). Since the LP2951's dropout voltage is dependent upon the load current (refer to the curve in the Typical Performance Characteristics), the input voltage trip point will vary with load current. The output voltage trip point does not vary with load. The error comparator output is an open collector which requires an external pullup resistor. This resistor may be returned to the output or some other voltage within the system. The resistance value should be chosen to be consistent with the 400 mA sink capability of the error comparator. A value between 100 k and 1.0 MW is suggested. No pullup resistance is required if this output is unused. When operated in the shutdown mode, the error comparator output will go high if it has been pulled up to an external supply. To avoid this invalid response, the error comparator output should be pulled up to Vout (see Figure 18).
5.0 V Output Voltage 4.75 V 4.70 V
ERROR
Not Valid
Not Valid
Pullup to Ext Pullup to Vout
4.75 V + Vdropout Input Voltage
4.70 V + Vdropout
1.3 V
1.3 V
The comparator switches to a positive logic low whenever the LP2951 output voltage falls more than approximately 5.0% out of regulation. This value is the comparator's designed-in offset voltage of 60 mV divided by the 1.235 V internal reference. As shown in the representative block diagram. This trip level remains 5.0% below normal regardless of the value of regulated output voltage. For example, the error flag trip level is 4.75 V for a normal 5.0 V regulated output, or 9.50 V for a 10 V output voltage. Figure 2 is a timing diagram which shows the ERROR signal and the regulated output voltage as the input voltage
Figure 18. ERROR Output Timing Programming the Output Voltage (LP2951)
The LP2951CX may be pin-strapped for the nominal fixed output voltage using its internal voltage divider by tying Pin 1 (output) to Pin 2 (sense) and Pin 7 (feedback) to Pin 6 (5.0 V tap). Alternatively, it may be programmed for any output voltage between its 1.235 reference voltage and its 30 V maximum rating. An external pair of resistors is required, as shown in Figure 19.
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LP2950, LP2951, NCV2951
Vin
100 k Error Output 5 Error
8 Vin
Vout SNS
1 2 NC 0.01 mF Vout 1.23 to 30 V 3.3 mF
for reducing noise on the 3 lead LP2950. However, increasing the capacitor from 1.0 mF to 220 mF only decreases the noise from 430 mV to 160 mVrms for a 100 kHz bandwidth at the 5.0 V output. Noise can be reduced fourfold by a bypass capacitor across R1, since it reduces the high frequency gain from 4 to unity. Pick
C Bypass [ 1 2pR1 x 200 Hz
Shutdown Input
3
SD
VO T
6 NC R1
GND FB 4 7 R2
or about 0.01 mF. When doing this, the output capacitor must be increased to 3.3 mF to maintain stability. These changes reduce the output noise from 430 mV to 126 mVrms for a 100 kHz bandwidth at 5.0 V output. With bypass capacitor added, noise no longer scales with output voltage so that improvements are more dramatic at higher output voltages.
Unregulated Input 1.0 mF 10 k 0.01 mF Vout 5.0 V 1.0% 0 to 1.0 A Vout 1 2 6
Figure 19. Adjustable Regulator
The complete equation for the output voltage is: V + V (1 ) R1 R2) ) I R1
out ref FB
MTB23P06E
where Vref is the nominal 1.235 V reference voltage and IFB is the feedback pin bias current, nominally -20 nA. The minimum recommended load current of 1.0 mA forces an upper limit of 1.2 MW on the value of R2, if the regulator must work with no load. IFB will produce a 2% typical error in Vout which may be eliminated at room temperature by adjusting R1. For better accuracy, choosing R2 = 100 k reduces this error to 0.17% while increasing the resistor program current to 12 mA. Since the LP2951 typically draws 75 mA at no load with Pin 2 open circuited, the extra 12 mA of current drawn is often a worthwhile tradeoff for eliminating the need to set output voltage in test.
Output Noise
Error Output
5 Error
8 Vin
SNS LP2951CN Shutdown Input 3 SD VO T
220 mF
GND FB 4 7 0.002 mF 1.0 M 2.0 k
In many applications it is desirable to reduce the noise present at the output. Reducing the regulator bandwidth by increasing the size of the output capacitor is the only method
Figure 20. 1.0 A Regulator with 1.2 V Dropout
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LP2950, LP2951, NCV2951
TYPICAL APPLICATIONS
+V = 2.0 to 30 V
IL Unregulated Input 6.0 to 10 Vdc
Load
IL = 1.23/R
8 NC 5 Error Vin Vout 1 1N4001 4.2 V 0.025 V 2.0 M 1.0% 806 k 1.0% 50 k GND Error Output 5 Error
8 Vin Vout
0.1 mF 1
2 NC SNS 0.1 mF LP2951CN 3 6 NC SD VO T GND FB 4 7
330 pF
Shutdown Input Lithium Ion Rechargeable Cell
2 SNS LP2951CN 3 6 SD VO T GND FB 4 7 R 1.0 mF
2.2 mF
Figure 21. Lithium Ion Battery Cell Charger
Figure 22. Low Drift Current Sink
+Vin +Vin 470 k 2N3906 5 470 k Reset Normally Closed Error 8 Vin *Sleep Input Vout 1 2 NC R1 Vout 47 k Error Output 5 Error CMOS Gate
SNS LP2951CN 3 SD VO T
8 Vin
470 k Vout 1 2 NC 2N3906 Vout
6 NC
GND FB 4 7 R2
1.0 mF Shutdown Input
SNS LP2951CN 3 SD GND 4 VO T FB 7
200 k 3.3 mF 100 k 100 pF
6 NC
Error flag occurs when Vin is too low to maintain Vout, or if Vout is reduced by excessive load current.
100 k
Figure 23. Latch Off When Error Flag Occurs
Figure 24. 5.0 V Regulator with 2.5 V Sleep Function
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LP2950, LP2951, NCV2951
+Vin 8 Vin Error
5
Vout
1 D1
D2 1.0 mF 20
Memory V+ 3.6 V NiCad
NC
2 SNS LP2951CN 3 #1 6 SD VO T GND FB 4 7
27 k
Early Warning D3 Reset mP All diodes are 1N4148. Early Warning flag on low input voltage. Main output latches off at lower input voltages. Battery backup on auxiliary output. Vout 1 Main Output 1.0 mF Operation: Regulator #1's Vout is programmed one diode drop above 5.0 V. Its error flag becomes active when Vin < 5.7 V. When Vin drops below 5.3 V, the error flag of regulator #2 becomes active and via Q1 latches the main output "off". When Vin again exceeds 5.7 V, regulator #1 is back in regulation and the early warning signal rises, unlatching regulator #2 via D3.
2.7 M Q1
2N3906
D4 330 k 5 Error 8 Vin
VDD
2 SNS LP2951CN #2 3 6 SD VO T GND 4 FB 7
Figure 25. Regulator with Early Warning and Auxiliary Output
Current Limit Section 680 2N3906 2N3906 470
+Vin
0.05
1000 mF
MJE2955 10 k 4.7 M Error Flag 5 Error 8 Vin .33 mF
Vout
1 2 NC 47 4.7 mF Tant R1 Vout @ 2.0 A 100 mF
SNS LP2951CN 220 20 k 3 SD VO T
6 NC .01 mF
GND FB 4 7
0.033 mF Vout = 1.25V (1.0 + R1/R2)
R2
For 5.0 V output, use internal resistors. Wire Pin 6 to 7, and wire Pin 2 to +Vout Bus.
Figure 26. 2.0 A Low Dropout Regulator http://onsemi.com
12
LP2950, LP2951, NCV2951
+ 5.0 V 4.7 k Output* 1 4 20 mA 8 Vin Error 5
NC
5
Vout
1 2 6
2 NC NC
4
SNS LP2951CN NC 1N4001 0.1 mF 3 SD Gnd 4 VO T FB 7
* High for IL < 3.5 mA
1N457 1N457 1N457 360
Figure 27. Open Circuit Detector for 4.0 to 20 mA Current Loop
31.6 k 100 k 2N3906 8 Vin Error
6.0 V Lead-Acid Battery
2 MC34164P-5 3 1
NC
5
Vout
1 2 6 1.0 mF NC 20
Main V+ Memory V+
SNS LP2951CN 3 SD Gnd 4 VO T FB 7 NC
NiCad Backup Battery
Figure 28. Low Battery Disconnect
100 R JA, THERMAL RESISTANCE JUNCTION-TO-AIR ( C/W) 90 80 70 60 50 RqJA 40 0 5.0 10 15 20 Minimum Size Pad Free Air Mounted Vertically PD(max) for TA = 50C
2.4 2.0
L, LENGTH OF COPPER (mm)
Figure 29. DPAK Thermal Resistance and Maximum Power Dissipation versus PCB Copper Length http://onsemi.com
13
IIII IIII IIII IIII
L 25 30
2.0 oz. Copper L
1.6 1.2 0.8 0.4 0
PD, MAXIMUM POWER DISSIPATION (W)
LP2950, LP2951, NCV2951
ORDERING INFORMATION (LP2950)
Part Number LP2950CZ-3.0 LP2950CZ-3.0G LP2950CZ-3.0RA LP2950CZ-3.0RAG LP2950ACZ-3.0 LP2950ACZ-3.0G LP2950ACZ-3.0RA LP2950ACZ-3.0RAG LP2950CZ-3.3 LP2950CZ-3.3G LP2950CZ-3.3RA LP2950CZ-3.3RAG LP2950ACZ-3.3 LP2950ACZ-3.3G LP2950ACZ-3.3RA LP2950ACZ-3.3RAG LP2950CZ-5.0 LP2950CZ-5.0G LP2950CZ-5.0RA LP2950CZ-5.0RAG LP2950CZ-5.0RP LP2950CZ-5.0RPG LP2950ACZ-5.0 LP2950ACZ-5.0G LP2950ACZ-5.0RA LP2950ACZ-5.0RAG LP2950CDT-3.0 LP2950CDT-3.0G LP2950CDT-3.0RK LP2950CDT-3.0RKG LP2950ACDT-3.0 LP2950ACDT-3.0G LP2950ACDT-3.0RK LP2950ACDT-3RKG LP2950CDT-3.3 Output Voltage (Volts) 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.3 Tolerance (%) 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 Package TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) TO-92 TO-92 (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK Shipping 2000 Units / Bag 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Tape & Reel 2000 Units / Bag 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Tape & Reel 2000 Units / Bag 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Tape & Reel 2000 Units / Bag 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Tape & Reel 2000 Units / Bag 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Tape & Reel 2000 Units / Ammo Pack 2000 Units / Ammo Pack 2000 Units / Bag 2000 Units / Bag 2000 Units / Tape & Reel 2000 Units / Tape & Reel 75 Units / Rail 75 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 75 Units / Rail 75 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 75 Units / Rail
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14
LP2950, LP2951, NCV2951
ORDERING INFORMATION (LP2950)
Part Number LP2950CDT-3.3G LP2950CDT-3.3RK LP2950CDT-3.3RKG LP2950ACDT-3.3 LP2950ACDT-3.3RG LP2950ACDT-3.3RK LP2950CDT-5.0 LP2950CDT-5.0G LP2950CDT-5.0RK LP2950CDT-5.0RKG LP2950ACDT-5.0 LP2950ACDT-5.0G LP2950ACDT-5.0RK LP2950ACDT-5RKG Output Voltage (Volts) 3.3 3.3 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Tolerance (%) 1.0 1.0 1.0 0.5 0.5 0.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 Package DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) DPAK DPAK (Pb-Free) Shipping 75 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 75 Units / Rail 75 Units / Rail 2500 Units / Tape & Reel 75 Units / Rail 75 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 75 Units / Rail 75 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
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15
LP2950, LP2951, NCV2951
ORDERING INFORMATION (LP2951)
Part Number LP2951CD-3.0 LP2951CD-3.0G LP2951CD-3.0R2 LP2951CD-3.0R2G LP2951ACD-3.0 LP2951ACD-3.0G LP2951ACD-3.0R2 LP2951ACD-3.0R2G LP2951CD-3.3 LP2951CD-3.3G LP2951CD-3.3R2 LP2951CD-3.3R2G LP2951ACD-3.3 LP2951ACD-3.3G LP2951ACD-3.3R2 LP2951ACD-3.3R2G LP2951CD LP2951CDG LP2951CDR2 LP2951CDR2G LP2951ACD LP2951ACDG LP2951ACDR2 LP2951ACDR2G LP2951CDM-3.0R2 LP2951CDM-3.0R2G LP2951ACDM-3.0R2 LP2951CDM-3.3R2 LP2951CDM-3.3R2G LP2951ACDM-3.3RG LP2951ACDM-3.3R2 LP2951CDMR2 LP2951CDMR2G LP2951ACDMR2 LP2951ACDMR2G Output Voltage (Volts) 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 3.0 3.0 3.0 3.3 3.3 3.3 3.3 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. Tolerance (%) 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 1.0 1.0 0.5 1.0 1.0 0.5 0.5 1.0 1.0 0.5 0.5 Package SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) Micro8 Micro8 (Pb-Free) Micro8 Micro8 Micro8 (Pb-Free) Micro8 (Pb-Free) Micro8 Micro8 Micro8 (Pb-Free) Micro8 Micro8 (Pb-Free) Shipping 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel 4000 Units / Tape & Reel
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16
LP2950, LP2951, NCV2951
ORDERING INFORMATION (LP2951)
Part Number LP2951ACDM-5.0R2 LP2951CN-3.0 LP2951CN-3.0G LP2951ACN-3.0 LP2951ACN-3.0G LP2951CN-3.3 LP2951CN-3.3G LP2951ACN-3.3 LP2951ACN-3.3G LP2951CN LP2951CNG LP2951ACN LP2951ACNG Output Voltage (Volts) 5.0 or Adj. 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. Tolerance (%) 0.5 1.0 1.0 0.5 0.5 1.0 1.0 0.5 0.5 1.0 1.0 0.5 0.5 Package Micro8 PDIP-8 PDIP-8 (Pb-Free) PDIP-8 PDIP-8 (Pb-Free) PDIP-8 PDIP-8 (Pb-Free) PDIP-8 PDIP-8 (Pb-Free) PDIP-8 PDIP-8 (Pb-Free) PDIP-8 PDIP-8 (Pb-Free) Shipping 4000 Units / Tape & Reel 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail 50 Units / Rail
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
ORDERING INFORMATION (NCV2951)
Part Number NCV2951ACD-3.3R2* NCV2951ACD3.3R2G NCV2951ACDR2* NCV2951ACDR2G NCV2951CDR2* NCV2951CDR2G* Output Voltage (Volts) 3.3 3.3 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. 5.0 or Adj. Tolerance (%) 0.5 0.5 0.5 0.5 1.0 1.0 Package SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) Shipping 2500 Units / Tape & Reel 2500 Units / Tape & Reel 2500 Units / Tape & Reel 2500 Units / Tape & Reel 2500 Units / Tape & Reel 2500 Units / Tape & Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NCV prefix is for automotive and other applications requiring site and control changes.
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17
LP2950, LP2951, NCV2951
MARKING DIAGRAMS
TO-92 Z SUFFIX CASE 029 2950 CZ-xx ALYWWG G 2950A CZ-xx ALYWWG G
DPAK DT SUFFIX CASE 369C
50-yG ALYWW
50-yyG ALYWW
50A-yG ALYWW
50AyyG ALYWW
SOIC-8 D SUFFIX CASE 751 8 51z ALYW G 1 * 8 51z-33 ALYW G 1 * 8 51z-3 ALYW G 1
PDIP-8 N SUFFIX CASE 626 8 51CN AWL YYWWG 1 1 8 51ACN AWL YYWWG 1 8 51CN-xx AWL YYWWG 1 8 51ACN-xx AWL YYWWG 1 8
Micro8 DM SUFFIX CASE 846A 8 PAxx AYWG G 1 P-xx AYWG G
xx = 3.0, 3.3, or 5.0 y = 3 or 5 yy = 30, 33, or 50 z = A or C A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week G = Pb-Free Package G = Pb-Free Package (Note: Microdot may be in either location) *This marking diagram also applies to NCV2951.
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18
LP2950, LP2951, NCV2951
PACKAGE DIMENSIONS
TO-226AA/TO-92 Z SUFFIX PLASTIC PACKAGE CASE 29-11 ISSUE AL
A R P L
SEATING PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.021 0.045 0.055 0.095 0.105 0.015 0.020 0.500 --- 0.250 --- 0.080 0.105 --- 0.100 0.115 --- 0.135 --- MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.407 0.533 1.15 1.39 2.42 2.66 0.39 0.50 12.70 --- 6.35 --- 2.04 2.66 --- 2.54 2.93 --- 3.43 ---
B
K
XX G H V
1
D J C SECTION X-X N N
DIM A B C D G H J K L N P R V
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19
LP2950, LP2951, NCV2951
PACKAGE DIMENSIONS
DPAK DT SUFFIX PLASTIC PACKAGE CASE 369C-01 ISSUE O
-T- B V R
4
SEATING PLANE
C E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. INCHES MIN MAX 0.235 0.245 0.250 0.265 0.086 0.094 0.027 0.035 0.018 0.023 0.037 0.045 0.180 BSC 0.034 0.040 0.018 0.023 0.102 0.114 0.090 BSC 0.180 0.215 0.025 0.040 0.020 --- 0.035 0.050 0.155 --- MILLIMETERS MIN MAX 5.97 6.22 6.35 6.73 2.19 2.38 0.69 0.88 0.46 0.58 0.94 1.14 4.58 BSC 0.87 1.01 0.46 0.58 2.60 2.89 2.29 BSC 4.57 5.45 0.63 1.01 0.51 --- 0.89 1.27 3.93 ---
A S
1 2 3
Z U
K F L D G
2 PL
J H 0.13 (0.005) T
M
DIM A B C D E F G H J K L R S U V Z
SOLDERING FOOTPRINT*
6.20 0.244 2.58 0.101 5.80 0.228 1.6 0.063 6.172 0.243 3.0 0.118
SCALE 3:1
mm inches
*For additional information on our Pb-Free strategy and soldering details please download the ON Semiconductor Soldering and Mozunting Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
20
LP2950, LP2951, NCV2951
PACKAGE DIMENSIONS
SOIC-8 D SUFFIX PLASTIC PACKAGE CASE 751-07 ISSUE AH
-X- A
8 5 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. 751-01 THRU 751-06 ARE OBSOLETE. NEW STANDARD IS 751-07. MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244
B
1 4
S
0.25 (0.010)
M
Y
M
-Y- G C -Z- H D 0.25 (0.010)
M SEATING PLANE
K
N
X 45 _
0.10 (0.004)
M
J
ZY
S
X
S
DIM A B C D G H J K M N S
SOLDERING FOOTPRINT*
1.52 0.060 7.0 0.275 4.0 0.155
0.6 0.024
1.270 0.050
SCALE 6:1 mm inches
*For additional information on our Pb-Free strategy and soldering details please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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21
LP2950, LP2951, NCV2951
PACKAGE DIMENSIONS
PDIP-8 N SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE L
NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --- 10 _ 0.76 1.01 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --- 10_ 0.030 0.040
8
5
-B-
1 4
F
NOTE 2
-A- L
C -T-
SEATING PLANE
J N D K
M
M TA B
H
G 0.13 (0.005)
M M
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22
LP2950, LP2951, NCV2951
PACKAGE DIMENSIONS
Micro8E DM SUFFIX PLASTIC PACKAGE CASE 846A-02 ISSUE G
D
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. 846A-01 OBSOLETE, NEW STANDARD 846A-02. MILLIMETERS NOM MAX -- 1.10 0.08 0.15 0.33 0.40 0.18 0.23 3.00 3.10 3.00 3.10 0.65 BSC 0.40 0.55 0.70 4.75 4.90 5.05 MIN -- 0.05 0.25 0.13 2.90 2.90 INCHES NOM -- 0.003 0.013 0.007 0.118 0.118 0.026 BSC 0.021 0.016 0.187 0.193 MIN -- 0.002 0.010 0.005 0.114 0.114
HE
E
PIN 1 ID
e b 8 PL 0.08 (0.003)
M
TB
S
A
S
-T- PLANE 0.038 (0.0015) A1
SEATING
DIM A A1 b c D E e L HE
MAX 0.043 0.006 0.016 0.009 0.122 0.122 0.028 0.199
A c L
SOLDERING FOOTPRINT*
1.04 8X 0.041 0.38 0.015
8X
3.20 0.126
4.24 0.167
5.28 0.208
6X
0.65 0.0256
SCALE 8:1
mm inches
*For additional information on our Pb-Free strategy and soldering details please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
23
LP2950, LP2951, NCV2951
SENSEFET is a trademark of Semiconductor Components Industries, LLC. Micro8 is a trademark of International Rectifier.
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
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24
LP2950/D

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