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Description
The GM66300 series is 3.0A low-dropout linear voltage regulators that provide a low-voltage, and high-current output with a minimum of external components. The GM66300 series offers extremely low dropout (typically 400mV at 3.0A) and low ground current (typically 36mA at 3.0A). The GM66300 series is ideal for PC add-in cards that need to convert from standard 3.0V to 2.5V and 2.5V to 1.8, down to new, lower core voltages. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the GM66300 series to provide 2.5V from a supply as low as 3V or 1.8V . The GM66300 series also has fast transient response, for heavy switching applications. The device requires only 47F of output capacitance to maintain stability and achieve fast transient response. The GM66300 series is fully protected with overcurrent limiting, thermal shutdown, reversed-battery protection, reversed-lead insertion protection, and reversed-leakage protection. The GM66301 series offers a TTL-logic-compatible enable pin, and an error flag that indicates undervoltage and overcurrent conditions. Offered in a fixed voltages, 1.8V and 2.5V, the GM66300 series comes in the TO-220 and TO-263 packages, and is an ideal upgrade to older, NPNbased linear voltage regulators. The GM66030 is adjustable version.
Features
3.0A minimum guaranteed output current 500mV dropout voltage Ideal for 3.0V to 2.5V conversion Ideal for 2.5V to 1.8V conversion 1% initial accuracy Low ground current Current limiting and Thermal shutdown Reversed-battery protection Reversed-leakage protection Fast transient response TO-220 and TO-263 packages TTL/CMOS compatible enable pin (GM66301 only) Error flag output (GM66301 only) Adjustable version (GM66302 only)
Application
LDO linear regulator for PC add-in cards High-efficiency linear power supplies SMPS post regulator Multimedia and PC processor supplies Low-voltage microcontrollers Strong ARMTM processor supply
TYPICAL APPLICATION CIRCUITS
100kW
VIN 3.3V
VIN
VOUT
VOUT 2.5V
ENABLE SHUTDOWN
GM66300 - 2.5
GND
GM66301 - 2.5
VEN VIN GND FLG VOUT
ERROR FLAG OUTPUT
+
47F
VIN 3.3V
VOUT 2.5V
+
47F
ENABLE SHUTDOWN
GM66302
VEN VIN GND 10F OUT
+
VIN 3.3V Adj
1.25V
47F
www.gammamicro.com
GM66300 SERIES V0.1
1
GM 431
MARKING INFORMATION & PIN CONFIGURATIONS
TO-263-2 (D PAK)
2
TO-220
TO-220- 5
TO-263-5(D PAK)
2
TO-220- 5
GM66300
VVAYWW
GM66300
VVAYWW
GM66301
VVAYWW
GM66301
VVAYWW
GM66302
AYWW
VIN GND
VOUT VIN
2
GND
VOUT
EN VIN
FLG GND VOUT
EN VIN
FLG GND VOUT EN VIN Adj GND VOUT
TO-263-5(D PAK)
Pinout On all devices, the Tab is grounded. GM66300/ Three Terminal GM66302
AYWW
Pin 1 = Input, 2 = Ground, 3 = Output GM66301/ Five Terminal (Fixed Voltage Devices)
VV
EN VIN Adj GND VOUT
A Y WW
= Output Voltage (18=1.8V , 25=2.5V) = Assembly Location = Year = Weekly
Pin 1 = Enable, 2 = Input, 3 = Ground, 4 = Output, 5 = Flag GM66302/ Adjustable with ON/ OFF Control Pin 1 = Enable, 2 = Input, 3 = Ground, 4 = Output, 5 = Adjust
ORDERING INFORMATION
Ordering Number Output Voltage Package Shipping
GM66300
GM66300-1.8TA3T GM66300-1.8TA3R GM66300-1.8TB3T GM66300-2.5TA3T GM66300-2.5TA3R GM66300-2.5TB3T 1.8V 1.8V 1.8V 2.5V 2.5V 2.5V TO-263-2 TO-263-2 TO-220 TO-263-2 TO-263-2 TO-220 50 Units/ Tube 800 Units/ Tape & Reel 50 Units/ Tube 50 Units/ Tube 800 Units/ Tape & Reel 50 Units/ Tube
GM66300 SERIES
GM66301
GM66301-1.8TA5T GM66301-1.8TA5R GM66301-1.8TB5T GM66301-2.5TA5T GM66301-2.5TA5R GM66301-2.5TB5T 1.8V 1.8V 1.8V 2.5V 2.5V 2.5V TO-263-5 TO-263-5 TO-220-5 TO-263-5 TO-263-5 TO-220-5 50 Units/ Tube 800 Units/ Tape & Reel 50 Units/ Tube 50 Units/ Tube 800 Units/ Tape & Reel 50 Units/ Tube
GM66302
GM66302TA5T GM66302TA5R GM66302TB5T Adj Adj Adj TO-263-5 TO-263-5 TO-220-5 50 Units/ Tube 800 Units/ Tape & Reel 50 Units/ Tube
* For detail Ordering Number identification, please see last page.
2
PIN DESCRIPTION
PIN Number PIN Number PIN NUMBER PIN Name GM66300 GM66301 GM66302
1 1 2, TAB 3 2 3, TAB 4 5 5 1 2 3, TAB 4 VEN VIN GND VOUT FLG Adj
PIN Function
Enable (Input): TTL/CMOS compatible input. Logic high=enable; logic low or open=shutdown. Unregulated Input: +16V maximum supply. Ground: Ground pin and TAB are internally connected. Regulator Output. Error Flag (Output): Open collector output. Active low indicates an output fault condition. Adjustable
ABSOLUTE MAXIMUM RATINGS (Note 1)
Parameter
Power Dissipation Supply Voltage Lead Temperature (Soldering, 5 sec) Storage Temperature Range ESD, Note 3
Symbol
PD VIN TLEAD TSTG
Value
Internally limited -20 to +20 260 -65 to +150
Unit
W V C C
OPERATING RATINGS (Note 2)
Parameter
Supply Voltage Enable Voltage Operating junction Temperature Range Thermal Resistance (TO-263-2 ,TO-220) Maximum Power Dissipation, Note 4
Symbol
VIN VEN TJ qJC
Value
+ 2.5 to +16 +16 -40 to +125 2.0
Unit
V V C C/W
FUNCTIONAL DIAGRAM
IN O.V. ILimit 18V FLAG*
OUT
+ -
1.18V
Ref.
1.24V
+ -
EN* Thermal Shut-down
GND * GM66301 ONLY
GM66300 SERIES
3
ELECTRICAL CHARACTERISTICS
TJ = 25C, bold values indicate -40C
Parameter
Output Voltage
10mA IOUT
TJ +125C; unless noted
Min
-1 8V -2 0.06 0.20 20 65 185 250 385 10 17 45 6 4.5 550 20
Conditions
IO = 10 mA 3A, VOUT + 1V VIN
Typ
Max
1 2 0.5 1.0 100 200
Unit
% % % %
Line Regulation Load Regulation Output Voltage change with Temperature Coef. Note 5 Dropout Voltage Note 6 & 9
IOUT = 10mA, VOUT + 1V VIN 8V VIN = VOUT + 1V, 10mA IOUT 3A DVOUT / DT IOUT = 100mA, DVOUT = -1% IOUT = 750mA, DVOUT = -1% IOUT = 1.5A, DVOUT = -1% IOUT = 3A, DVOUT = -1% IOUT = 750mA, VIN = VOUT + 1V IOUT = 1.5A, VIN = VOUT + 1V IOUT = 3A, VIN = VOUT + 1V VIN VOUT(nominal) -0.5V, IOUT=10mA VOUT= 0V, VIN = VOUT + 1V
ppm/C
mV
Ground Current Note 7 Dropout Ground Pin Current Current Limit
Enable Input (Gm66301)
mA
mA A
Logic Low (off) Enable Input Voltage Logic high (on) VEN = 2.5V VEN = 0.8V Shutdown Output Current
Flag Output (GM66301) 2.5 15
0.8
V V
Enable Input Current
30 75 2 4
A A A
(Note 8)
10
20
Output Leakage Current Output Low Voltage Low Threshold High Threshold Hysteresis
Note Note Note Note
VOH = 16V VIN = 2.5V, IOL= 250A Note 9 % of VOUT % of VOUT
93
0.01 220
1 2 300 400
A mV %
99.2 1
% %
1. Exceeding the absolute maximum ratings may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handing precautions recommended. 4. P D(max) =(T J(max) -T A ) / q JA , where q JA depends upon the printed circuit layout. See "Applications Information".
GM66300 SERIES
4
Note 5. Output voltage temperature coefficient is DV OUT(worst case) / (TJ(max) - TJ(min) ) where T J(max) is +125C and T J(min) is -40C. Note 6. V DO =V IN -V OUT when VOUT decreases to 99% of its nominal output voltage with V IN =V OUT +1V. For voltages below 2.5V, dropout voltage is the input-to-output voltage differential with the minimum input voltage being 2.5V. Minimum input operating voltage is 2.25V. Note 7. I GND is the quiescent current. IIN = IGND + IOUT Note 8. V EN 0.8V, V IN 8V, and VOUT = 0V Note 9. For a 1.8V device, VIN = 2.5V.
TYPICAL CHARACTERISTICS
400 350 Dropout Voltage (mV) 300 250 200 150 100 50 0 0 1000 2000 3000 VOUT = 1.8V Dropout Voltage (mV) VOUT = 2.5V 600 500 400 300 200 100 ILOAD = 3.0A 0 -40 -20 0 20 40 60 80 100 120 1.2 1.2 1.6 2.0 2.4 2.8 3.2 3.6 VOUT = 1.8V Output Voltage (V) VOUT = 2.5V
2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 ILOAD = 1.5A ILOAD = 3A ILOAD = 100mA
Output Current (mA)
Temperature (C)
Figure 1. Dropout Voltage vs. Output Current
Figure 2. Dropout Voltage vs. Temperature
Input Voltage(V)
Figure 3. Dropout Characteristics
100 90 80 Ground Current (mA) 70 60 50 40 30 20 10 0 0 2 4 6 ILOAD = 1000mA 8 10 12 Supply Voltage (V) ILOAD = 1500mA ILOAD = 3000mA Ground Current (mA)
8 7
25
20 5 4 3 2 1 0 -40 -20 ILOAD = 10mA 0 20 40 60 80 100 120 0 -40 Ground Current (mA) 6 VOUT = 1.8V VOUT = 2.5V
VOUT = 2.5V
15
VOUT = 1.8V
10
5 ILOAD = 1500mA -20 0 20 40 60 80 100 120
Temperature (C)
Temperature (C)
Figure 4. Ground Current vs. Supply Voltage
Figure 5. Ground Current vs. Temperature
Figure 6. Ground Current vs. Temperature
60 50 Ground Current (mA) 40 30 20 10 0 -40 -20 ILOAD = 3000A 0 20 40 60 80 100 120 Temperature (C) VOUT = 2.5V VOUT = 1.8V
6 Typical 1.8V Device 5 Short Circuit Current (A) Flag Voltage(V) 4 3 2 1 0 -40 -20 VIN = VOUT (NOM) + 1V VOUT =0 0 20 40 60 80 100 120 Temperature (C) Typical 2.5V Device
6 5 4 3 Flag High (OK)
VIN =5V
1 Flag Low (Fault) 0 0.01 0.1 1 10
100
1000 10000
Resistance (k )
Figure 7. Ground Current vs. Temperature
Figure 8. Short Circuit Current vs. Temperature
Figure 9. Error Flag Pull-up Resistor
GM66300 SERIES
5
2
APPLICATION INFORMATION
The GM66300 series is a high performance with lowdropout voltage regulator, suitable for moderate to high-current voltage regulator applications. Its 500mV dropout voltage at full load makes it especially valuable in battery-powered systems and as a high-efficiency noise filter in post-regulator applications. Unlike older NPN-pass transistor designs, where the minimum dropout voltage is limited by the base-toemitter voltage drop and collector-to-emitter saturation voltage. Dropout performance of the PNP output of these devices is limited only by the low VCE saturation Voltage. The GM66300 series regulator is fully protected from damage due to fault conditions. Current limiting is provided. This limiting is linear, output current during overload conditions is constant. Thermal shutdown disables the device when the die temperature exceeds the maximum safe operating temperature. Transient protection allows device (and load) survival even when the input voltage spikes above and below nominal. The output structure of these regulators allows voltages in excess of the desired output voltage to be applied without reverse current flow. Calculate the power dissipation of the regulator from these numbers and the device parameters from this datasheet, where the ground current is taken from data sheet PD = (VIN - VOUT)IOUT + VIN IGND
The heat sink thermal resistance is determined by: TJ(MAX) - TA qSA = - (qJC + qCS ) PD where TJ(max) 2C/W. The heat sink may be significantly reduced in applications where the minimum input voltage is known and is large compared with the dropout voltage. Use a series input resistor to drop excessive voltage and distribute the heat between this resistor and the regulator. The low dropout properties of Super beta PNP regulators allow significant reductions in regulator power dissipation and the associated heat sink without compromising performance. When this technique is employed, a capacitor of at least 1.0F is needed directly between the input and regulator ground. Output Capacitor The GM66300 series requires an output capacitor to maintain stability and improve transient response. Proper capacitor selection is important to ensure proper operation. The GM66300 series output capacitor selection is dependent upon the ESR (equivalent series resistance) of the output capacitor to maintain stability. When the output capacitor is 47F or greater, the output capacitor should have less than 1W of ESR. This will improve transient response as well as promote stability. Ultra-low-ESR capacitors, such as ceramic chip capacitors may promote instability. These very low ESR levels may cause an oscillation and/or underdamped transient response. When larger capacitors are used, the ESR requirement approaches zero. A 100F ceramic capacitor can be used on the output while maintaining stability. A low-ESR 47F solid tantalum capacitor works extremely well and provides good transient response and stability over temperature. Aluminum electrolytics can also be used, as long as the ESR of the capacitor is 1W. The value of the output capacitor can be increased without limit. Higher capacitance values help to improve transient response, ripple rejection, and reduce output noise. 125C and qCS is between 0C and
VIN
GM66300 - X.X
VIN
VOUT
VOUT
GND
+
CIN
+
COUT
Figure 10. Capacitor Requirements Thermal Design
GM66300 SERIES
6
Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Thermal design requires four application-specific parameters: Maximum ambient temperature (TA) Output Current (IOUT) Output Voltage (VOUT) Input Voltage (VIN) Ground Current (IGND)
Input Capacitor An input capacitor of 1F or greater is recommended when the device is more than 4 inches away from the bulk as supply capacitance, or when the supply is a battery. Small surfacemount ceramic chip capacitors can be used for the bypassing. Larger values will help to improve ripple rejection by bypassing the input to the regulator, further improving the integrity of the output voltage. Transient Response and 3.3V to 2.5V and 2.5V to 1.8V Conversions The GM66300 series has excellent transient response to variations in input voltage and load current. The device has been designed to respond quickly to load current variations and input voltage variations. Large output capacitors are not required to obtain this performance. A standard 47F output capacitor, preferably tantalum, is all that is required. Larger values improve performance even further. By virtue of its low-dropout voltage, this device does not saturate into dropout as readily as similar NPNbased designs. When converting from 3.3V to 2.5V or 2.5V to 1.8V, the NPN-based regulators are already operating in dropout, with typical dropout requirements of 1.2V or greater. To convert down to 2.5V without operating in dropout, NPN-based regulators require an input voltage of 3.7V at the very least. The GM66300 series regulator will provides excellent performance with an input as low as 3.0V or 2.5V respectively. This gives the PNP-based regulators a distinct advantage over older, NPN-based linear regulators. A typical NPN regulator does not have the headroom to do this conversion. Minimum Load Current The GM66300 series regulator is specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. A 10mA minimum load current is necessary for proper regulation. Error Flag The GM66300 series version features an error flag circuit which monitors the output voltage and signals an error condition when the voltage 5% below the nominal output voltage.
The error flag is an open-collector output that can sink 10mA during a fault condition. Low output voltage can be caused by a number of problems, including an overcurrent fault (device in current limit) or low input voltage. The flag is inoperative during overtemperature shutdown. When the error flag is not used, it is best to leave it open. The flag pin can be tied directly to pin 4, the output pin. Enable Input The GM66300 series version features an enable input for on/off control of the device. Its shutdown state draws "zero" current. The enable input is TTL/CMOS compatible for simple logic interface, but can be connected to up to 20V. When enabled, it draws approximately 15A.
GM66300 SERIES
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TO-220 PACKAGE OUTLINE DIMENSIONS
9.90 0.20 3.60 0.20 1.30 0.10 1.70 1.50 DP0.20 9.20 0.20 3.70 0.20 15.90 0.20 4.60 18.95 MAX 3 0.9 7.0 8.70 2.80 0.10 4.50 0.20 8.0
+0.1 1.30 -0.05
7.0
8.40 1.46 1.00 45 3.00
3
3
13.08 0.20
10.08 0.30
1.27 0.10
3-R0.2
2.54 TYP (2.54 0.20)
0.80 0.10 1.52 0.10
0.50 -0.05
+0.1
2.40 0.20
3
3
2 - R 0.3
Unit: mm
10.00 0.20
TO-220-5 PACKAGE OUTLINE DIMENSIONS
9.97 0.20 9.90 0.20 3.60 0.20 1.30 0.10 1.70 1.50 DP0.20 3.70 0.20 4.60 15.90 0.20 3 7.0 0.20 28.78 MAX 9.20 0.20 3 3 8.70 2.80 0.10 4.50 0.20 8.0 0.20 1.30 -0.05
+0.1
7.0
GM66300 SERIES
9.20 0.20
8.40 1.2
13.08 0.20
3-R0.2
5-0.8 0.10
0.50 -0.05
+0.1
2.40 0.20
1.7(TYP) 3 3
2 - R 0.3
Unit: mm
10.00 0.20
8
TO-263-2 PACKAGE OUTLINE DIMENSIONS
9.90 0.20 0.40 15 1.20 3 1.50 DP0.20 9.20 0.20 4.50 0.20 1.30 -0.05
+0.1
Pad Layout
0.63 17.02 0.33 8.38 3 0.10 0.01 R0.30 2.40 0.20 2.54 0.10 0.50 -0.05 10.0 0.20 7.0 4.0 0.04 1.016
+0.1
0.12 3.05
15.3 0.20 3 1.4 0.20 4.90 0.20 0.90 0.10 1.27 0.10 2.54 TYP (2.54 0.20) 0.75 R0.30 2.00 0.10
0.42 10.66
0.24 6.096
0.40 3 R 0.3 R 0.45 7.2 9.20 0.20 3 0.90
(
Inches ) mm
10.00 0.20
4.90 0.20
Unit: mm
TO-263-5 PACKAGE OUTLINE DIMENSIONS
9.90 0.40 15' 1.20 3 4.60 1.50 DP0.20 9.20 4.50 1.30
Pad Layout
15.3 2.00 0.10 3 9
1.20
4.90
0.75 R0.30
2.40 R0.30 2.54 0.50 11.5
3.8 1.7
1.70 TYP (1.70 0.20)
0.80 0.40 1.75
10.0 8.0 7.0 4.40
1.07
3 R 0.3
3 0.90 R 0.45 7.2 9.20 15.30 10.00
Units: mm
4.90
Unit: mm
GM66300 SERIES
9
17.5
ORDERING NUMBER
GM 66300/ 6630X 1.8 TA3 T
Gamma Micro. Circuit Type Shipping R: Tape & Reel T: Tube Package TA3: TO-263-2 TA5: TO-263-5 TB3: TO-220-3 TB5: TO-220-5
Output Voltage 1.8: 1.8V 2.5: 2.5V Blank: Adj
GM66300 SERIES
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GM66300 SERIES

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