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SI9183
Vishay Siliconix
High-Performance, Size Saving 150-mA CMOS LDO Regulator
FEATURES
D D D D D D D D D Low 135-mV Dropout at 150-mA Load Guaranteed 150-mA Output Current 300-mA Peak Output Current Capability Uses Low ESR Ceramic Output Capacitor Fast Load And Line Transient Response Low Output Noise 1-mA Maximum Shutdown Current Built-in Short Circuit And Thermal Protection Fixed 1.5-V, 1.8-V, 2.0-V, 2.5-V, 2.7-V, 2.8-V, 2.85-V, 3.0-V, 3.3-V, 3.6-V, 5.0-V or Adjustable Output Voltage Options (Version B) D Thin SOT-23 5-Pin Package
APPLICATIONS
D D D D D D Battery Powered Portable Systems Cellular Phones PDAs, Palmtops Pagers Post Regulators for Multi-Output Converters Notebook Computers
DESCRIPTION
The SI9183 is a high performance yet size saving 150-mA CMOS LDO (low dropout) voltage regulator. Its ultra low ground current and dropout voltage prolong battery life in portable electronics. The device provides LINE/LOAD transient response and ripple rejection superior to that of Bipolar or BiCMOS LDO regulators. It is designed to maintain regulation while delivering 300-mA peak current. The SI9183 drives lower cost ceramic, as well as tantalum, output capacitors. Stability is guaranteed from maximum load current down to 0-mA load. An external noise bypass capacitor connected to the device's CBP pin will reduce the LDO's self-noise for low noise applications. The SI9183 includes a shutdown feature that allows users to completely disable the device and save power when no output is required. The SI9183, in Thin SOT23-5 packaging, is available in two versions (Version A or B). Version A offers low noise performance, while Version B features adjustable output voltage. The SI9183 is available in both standard and lead (Pb)-free packages.
TYPICAL APPLICATIONS CIRCUITS
SI9183-A
VIN 1 mF 2 GND 1 VIN VOUT 5 VOUT 2.2 mF VIN 1 mF 2 1
SI9183-B
VIN VOUT 5 VOUT 2.2 mF GND
SD ON OFF
3
SD
BP
4 0.1 mF
SD ON OFF
3
SD
FB
4
Thin SOT-23, 5-Lead
Thin SOT-23, 5-Lead
FIGURE 1. Version A with Low Output Noise
FIGURE 2. Version B with Adjustable Output
Document Number: 71258 S-40593--Rev. E, 29-Mar-04
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SI9183
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V SD Input Voltage, VSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to VIN Output Current, IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . Short Circuit Protected Output Voltage, VOUT . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to VO(nom) + 0.3 V Maximum Junction Temperature, TJ(max) . . . . . . . . . . . . . . . . . . . . . . . 150_C Storage Temperature, TSTG . . . . . . . . . . . . . . . . . . . . . . . . . . -65_C to 125_C ESD (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV Power Dissipation (Package)a, b 5-Pin SOT-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555 mW Thermal Impedance (QJA) 5-Pin SOT-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 _C/W Notes a. Device mounted with all leads soldered or welded to multi-layer (1S2P) JEDEC board, horizontal orientation. b. Derate 5.5 mW/_C above TA = 25_C.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 V to 6 V Output Voltage, VOUT (Adjustable Version) . . . . . . . . . . . . . . . . . . 1.5 V to 5 V SD Input Voltage, VSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to VIN Operating Ambient Temperature, TA . . . . . . . . . . . . . . . . . . . . -40_C to 85_C Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . -40_C to 125_C
CIN = 1 mF, COUT = 2.2 mF (ceramic, X5R or X7R type) , CBP = 0.1 mF (ceramic) COUT Range = 1 mF to 10 mF ("20% tolerance, "20% over temperature; ESR = 0.4 to 4 W at dc to 100 kHz, 0 t0 0.4 W > 100 kHz) )
SPECIFICATIONS (TA = 25_C)
Test Conditions Unless Otherwise Specified Parameter
Input Voltage Range Output Voltage Range Output Voltage Accuracy (Fixed Versions) Feedback Voltage (ADJ version) Line Regulation (Except 5-V Version) Line Regulation (5-V Version) Line Regulation (ADJ Version) VOUT
Limits
-40 to 85_C
Symbol
VIN
VIN = VOUT(nom) + 1 V IOUT = 1 mA V, A CIN = 1 mF, COUT = 2.2 mF, VSD = 1.5 V
Tempa
Full
Minb
2 1.5 -1.5 -2.5 1.188 1.176 -0.18 -0.18 -0.18 -0.18
Typc
Maxb
6 5 1.5 2.5
Unit
Adjustable Version 1 mA v IOUT v 150 mA
Full Room Full Room Full
V
% VO( O(nom) ) V
VFB From VIN = VOUT(nom) + 1 V to VOUT(nom) + 2 V From VIN = 5.5 V to 6 V VOUT = 1.5 V, From VIN = 2.5 V to 3.5 V VOUT = 5 V, From VIN = 5.5 V to 6 V IOUT = 10 mA
1.215
1.240 1.252 0.18 0.18 0.18 0.18
Full Full Full Full Room Room Full Room Full Room Room Full Full Room Room Room Room
VIN
DVOUT
100
VOUT(nom)
%/V
1 135 180 235
20 170 220 320 380 mV
Dropout Voltaged @VOUT w 2.5 V) Dropout Voltaged (@VOUT t 2.5 V, VIN w 2 V)
VIN - VOUT
IOUT = 150 mA IOUT = 150 mA IOUT = 0 mA
VIN - VOUT
150 500 900 0.1 2 250 300 300 100 1 100 mA nA mA mV (rms) m mA
Ground Pin Current
IGND IIN(off) IFB IO(peak) eN
IOUT = 150 mA VSD = 0 V VFB = 1.2 V VOUT w 0.95 x VOUT(nom), tpw = 2 ms BW = 50 Hz to 100 kHz IOUT = 150 mA w/o CBP CBP = 0.1 mF
Shutdown Supply Current FB Pin Current Peak Output Current Output Noise Voltage
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Document Number: 71258 S-40593--Rev. E, 29-Mar-04
SI9183
Vishay Siliconix
SPECIFICATIONS (TA = 25_C)
Test Conditions Unless Otherwise Specified Parameter Symbol
VIN = VOUT(nom) + 1 V, IOUT = 1 mA CIN = 1 mF, COUT = 2.2 mF, VSD = 1.5 V
Limits
-40 to 85_C
Tempa
Room Room Room Room Room Room Room
Minb
Typc
60 40 30 10 30 5 1000
Maxb
Unit
f = 1 kHz Ripple Rejection pp j DVOUT/DVIN IOUT = 150 mA f = 10 kHz f = 100 kHz Dynamic Line Regulation Dynamic Load Regulation VOUT Turn On Time Turn-On-Time DVO(line) DVO(load) tON VIN : VOUT(nom) + 1 V to VOUT(nom) + 2 V tR/tF = 5 ms, IOUT = 150 mA IOUT : 1 mA to 150 mA, tR/tF = 2 ms VIN = 4.3 V VOUT = 3.3 V w/o CBP Cap CBP = 0.1 mF
dB
mV
ms
Thermal Shutdown
Thermal Shutdown Junction Temp Thermal Hysteresis Short Circuit Current tJ(s/d) tHYST ISC VOUT = 0 V Room Room Room 165 20 400 _C mA
Shutdown Input
SD Input Voltage VIH VIL IIL IIH VHYST High = Regulator ON (Rising) Low = Regulator OFF (Falling) VSD = 0 V, Regulator OFF VSD = 6 V, Regulator ON Full Full Room Room Full 0.01 1.0 100 1.2 VIN 0.4 V
SD Input Currente Shutdown Hysteresis
mA mV
Notes a. Room = 25_C, Full = -40 to 85_C. b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum. c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. Typical values for dropout voltage at VOUT w 2 V are measured at VOUT = 2.5 V, while typical values for dropout voltage at VOUT < 2 V are measured at VOUT = 1.8 V. d. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 2% below the output voltage measured with a 1-V differential, provided that VIN does not not drop below 2.0 V. e. The device's shutdown pin includes a typical 6-MW internal pull-down resistor connected to ground. f. VOUT is defined as the output voltage of the DUT at 1 mA.
Document Number: 71258 S-40593--Rev. E, 29-Mar-04
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SI9183
Vishay Siliconix
TIMING WAVEFORMS
VIN
tON VNOM 0.95 VNOM VOUT
FIGURE 3. Timing Diagram for Power-Up
PIN CONFIGURATION
Thin SOT-23, 5-Pin
VIN 1 5 VOUT
GND
2 BP (Version A) FB (Version B)
SD
3
4
PIN DESCRIPTION
Pin Number
1 2 3 4 (Version A) 4 (Version B) 5
Name
VIN GND SD BP FB VOUT Ground pin. Local ground for CBP and COUT.
Function
Input supply pin. Bypass this pin with a 1-mF ceramic or tantalum capacitor to ground.
By applying less than 0.4 V to this pin, the device will be turned off. Connect this pin to VIN if unused. Noise bypass pin. For low noise applications, a 0.1-mF or larger ceramic capacitor should be connected from this pin to ground. Connect to divided output voltage to adjust the regulation point. Output voltage. Connect COUT between this pin and ground.
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Document Number: 71258 S-40593--Rev. E, 29-Mar-04
SI9183
Vishay Siliconix
ORDERING INFORMATION
Part Number
SI9183DT-15-T1 SI9183DT-18-T1 SI9183DT-20-T1 SI9183DT-25-T1 SI9183DT-27-T1 SI9183DT-28-T1 SI9183DT-285-T1 SI9183DT-30-T1 SI9183DT-33-T1 SI9183DT-36-T1 SI9183DT-50-T1 SI9183DT-AD-T1 NOTE: LL = Lot Code
Lead (Pb)-Free Part Number
SI9183DT-15-T1--E3 SI9183DT-18-T1--E3 SI9183DT-20-T1--E3 SI9183DT-25-T1--E3 SI9183DT-27-T1--E3 SI9183DT-28-T1--E3 SI9183DT-285-T1--E3 SI9183DT-30-T1--E3 SI9183DT-33-T1--E3 SI9183DT-36-T1--E3 SI9183DT-50-T1--E3 SI9183DT-AD-T1--E3
Marking
A1LL A2LL A3LL A4LL B1LL A5LL B3LL A6LL A7LL B2LL A8LL A9LL
Voltage
1.5 V 1.8 V 2.0 V 2.5 V 2.7 V 2.8 V 2.85 V 3.0 V 3.3 V 3.6 V 5.0 V Adjustable
Temperature Range
Package
-40 to 85_C
Thin SOT23-5
Eval Kit
SI9183DB
Temperature Range
-40 to 85_C
Board Type
Surface Mount
TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)
300 250 200 150 100 50 0 0 60 120 180 240 300 ILOAD (mA) 375 350 VOUT = 2.5 V 325 300 275 250 225 200 175 150 125 100 75 50 25 0 -50 -25 0 0.5 V OUT (V) 1.5
Dropout Voltage vs. Load Current
VOUT = 2.5 V
2.5
VIN - VOUT Transfer Characteristic
RLOAD = 250 W
2.0 RLOAD = 16.6 W
V DROP (mV)
1.0
0.0 0 1 2 3 VIN (V) 500 IOUT = 300 mA 400 Dropout Voltage (mV) 4 5 6
Dropout Voltage vs. Temperature
Dropout Voltage vs. VOUT
V DROP (mV)
300 IOUT = 300 mA 200 IOUT = 75 mA 100 IOUT = 10 mA 0 1.0 1.5 2.0 2.5 3.0 VOUT www.vishay.com 3.5 4.0 4.5 5.0 IOUT = 150 mA
IOUT = 150 mA
IOUT = 75 mA
IOUT = 10 mA IOUT = 0 mA 25 50 75 100 125 150
Junction Temperature (_C) Document Number: 71258 S-40593--Rev. E, 29-Mar-04
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SI9183
Vishay Siliconix
TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)
0.30 0.15 0.00 V OUT (%) -0.15 -0.30 -0.45 -0.60 -0.75 0 25 50 75 100 125 150 Load Current (mA)
Normalized Output Voltage vs. Load Current
VIN = VOUT(nom) + 1 V
-0.0 -0.2 -0.4
Normalized VOUT vs. Temperature
IOUT = 0 mA
Output Voltage (%)
IOUT = 150 mA -0.6 -0.8 -1.0 VIN = VOUT(nom) + 1 V -1.2 -40 -15 10 35
IOUT = 75 mA
60
85
Ambient Temperature (_C)
500
GND Current vs. Load Current
VOUT = 2.5 V VIN = 3.5 V
300 250
No Load GND Pin Current vs. Input Voltage
400
85_C -40_C
200 I GND ( mA) 150 100 85_C -40_C
I GND ( mA)
300
200
100
50 0 0 25 50 75 100 125 150 2 3 4 Input Voltage (V) 5 6 Load Current (mA)
0
1.5 1.4 1.3 1.2
Shutdown Pin Input Current vs. Temperature
VOUT = 2.5 V VSD = 6.5 V
1.5 1.4 1.3 1.2 1.1 VIL, VIH (V) 1.0 0.9 0.8 0.7 0.6 0.5
Shutdown Threshold vs. Temperature
VOUT = 2.5 V
1.1 I IH 1.0 0.9 0.8 0.7 0.6 0.5 -40 -15 10 35 60 85
VIH
VIL
0.4 -40
-15
10
35
60
85
Ambient Temperature
Ambient Temperature Document Number: 71258 S-40593--Rev. E, 29-Mar-04
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SI9183
Vishay Siliconix
TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)
0.75 VOUT = 2.5 V 0.65 -20
ISC vs. Temperature
0
Power Supply Rejection
CIN = 1 mF COUT = 2.2 mF ILOAD = 150 mA
I SC (A)
Gain (dB) -15 10 35 60 85
0.55
-40
0.45
0.35
-60
0.25 -40
-80 10
100
1K
10 K
100 K
1M
Ambient Temperature
Frequency (Hz)
TYPICAL WAVEFORMS
Turn-On Delay
SD 2 V/div SD 2 V/div
Turn-Off Delay
VOUT 2 V/div
VOUT 2 V/div 10.00 ms/div VIN = 4.2 V VOUT = 3.3 V CBP = 0.1 mF ILOAD = 350 mA 5.00 ms/div VIN = 4.2 V VOUT = 3.3 V CBP = 0.1 mF ILOAD = 350 mA
Output Noise
10.0
Noise Spectrum
100 mV/div mV Hz
0.01 1 ms/div VIN = 4 V VOUT = 3 V IOUT = 150 mA CIN = 1 mF COUT = 2.2 mF CBP = 0.1 mF BW = 10 Hz to 1 MHz 100 Hz VIN = 4 V VOUT = 3 IOUT = 150 mA CIN = 1 mF COUT = 2.2 mF CBP = 0.1 mF 1 MHz
Document Number: 71258 S-40593--Rev. E, 29-Mar-04
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SI9183
Vishay Siliconix
TYPICAL WAVEFORMS
Load Transient Response-1
VOUT 10 mV/div VOUT 10 mV/div ILOAD 100 mA/div ILOAD 100 mA/div
Load Transient Response-2
M 5.00 ms VOUT = 3.0 V COUT = 2.2 mF ILOAD = 1 to 150 mA trise = 2 msec
M 5.00 ms VOUT = 3.0 V COUT = 2.2 mF ILOAD = 150 to 1 mA tfall = 2 msec
Load Transient Response-3
VOUT 10 mV/div
Load Transient Response-4
VOUT 10 mV/div ILOAD 100 mA/div ILOAD 100 mA/div
M 5.00 ms VOUT = 3.0 V COUT = 1.0 mF ILOAD = 1 to 150 mA trise = 2 msec
M 5.00 ms VOUT = 3.0 V COUT = 1.0 mF ILOAD = 150 to 1 mA tfall = 2 msec
Line Transient Response-1
VIN 1 V/div VIN 1 V/div
Line Transient Response-2
VOUT 10 mV/div
VOUT 10 mV/div
VOUT = 3.0 V ILOAD = 150 mA VIN = 4 to 5 V COUT = 2.2 mF trise = 5 msec
M 20.0 ms
VOUT = 3.0 V ILOAD = 150 mA VIN = 5 to 4 V COUT = 2.2 mF tfall = 5 msec
M 20.0 ms
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Document Number: 71258 S-40593--Rev. E, 29-Mar-04
SI9183
Vishay Siliconix
BLOCK DIAGRAMS
4
BP
Switches shown for device in normal operating mode (SD = HIGH)
VIN CIN 1.0 mF
1
SD ON OFF
3
RFB2 6 MW RFB1
+ -
5 COUT 2.2 mF
VOUT
+ 2 -
1.215 V VREF
GND
FIGURE 4. 150-mA CMOS LDO Regulator (Fixed Output)
4 VIN CIN 1.0 mF 1
FB
R2 3 VFB R1
SD ON OFF
+ - 6 MW
5 COUT 2.2 mF
VOUT
+ 2 -
1.215 V VREF
GND
FIGURE 5. 150-mA CMOS LDO Regulator (Adjustable Output)
Document Number: 71258 S-40593--Rev. E, 29-Mar-04
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SI9183
Vishay Siliconix
DETAILED DESCRIPTION
The SI9183 is a low drop out, low quiescent current, linear regulator family with very fast transient response. It is primarily designed for battery powered applications where battery run time is at a premium. The low quiescent current allows extended standby time while low drop out voltage enables the system to fully utilize battery power before recharge. The SI9183 is a very fast regulator with bandwidth exceeding 50 kHz while maintaining low quiescent current at light load conditions. With this bandwidth, the SI9183 is one of the fastest LDO available today. The SI9183 is stable with one of any output capacitor types from 1 mF to 10.0 mF. However, X5R or X7R ceramic capacitors are recommended for best output noise and transient performance. VIN VIN is the input supply pin. The bypass capacitor for this pin is not critical as long as the input supply has low enough source impedance. For practical circuits, a 1.0-mF or larger ceramic capacitor is recommended. When the source impedance is not low enough and/or the source is several inches from the SI9183, then a larger input bypass capacitor is needed. It is required that the equivalent impedance (source impedance, wire, and trace impedance in parallel with input bypass capacitor impedance) must be smaller than the input impedance of the SI9183 for stable operation. When the source impedance, wire, and trace impedance are unknown, it is recommended that an input bypass capacitor be used of a value that is equal to or greater than the output capacitor. VOUT VOUT is the output voltage of the regulator. Connect a bypass capacitor from VOUT to ground. The output capacitor can be any value from 1.0 mF to 10.0 mF. A ceramic capacitor with X5R or X7R dielectric type is recommended for best output noise, line transient, and load transient performance. GND Ground is the common ground connection for VIN and VOUT. It is also the local ground connection for CBP, ADJ, and SD. ADJ For the adjustable output version, use a resistor divider R1 and R2, connect R1 from VOUT to ADJ and R2 from ADJ to ground. R2 should be in the 25-kW to 150-kW range for low power consumption, while maintaining adequate noise immunity. The formula below calculates the value of R1, given the desired output voltage and the R2 value,
R1 + V OUT * VADJ R2 VADJ (1)
VADJ is nominally 1.215 V.
SHUTDOWN (SD) SD controls the turning on and off of the SI9183. VOUT is guaranteed to be on when the SD pin voltage equals or is greater than 1.2 V. VOUT is guaranteed to be off when theSD pin voltage equals or is less than 0.4 V. During shutdown mode, the SI9183 will draw less than 1-mA current from the source. To automatically turn on VOUT whenever the input is applied, tie the SD pin to VIN. CBP For low noise application, connect a high frequency ceramic capacitor from CBP to ground. A 0.01-mF or a 0.1-mF X5R or X7R is recommended.
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Document Number: 71258 S-40593--Rev. E, 29-Mar-04

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