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GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Description
GM66015 series of positive adjustable and fixed regulators is designed to provide 1.5A output current with low dropout voltage performance. Onchip trimming adjusts the reference voltage with an accuracy of O 1% for adjustable, and O 2% for fixed output voltage versions. Besides the features mentioned, GM66015 works well in post regulators or micro-processor power supplies where low voltage operation and fast transient response are required. GM66015 includes over current protection and thermal shutdown protection as well.
GM66015 is available in TO-220, surface-mount TO-263, surface-mount TO252 and SOT223 packages.
Features
Adjustable or Fixed Output Output Current of 1.5A Low Dropout, 1.5V max at 1.5A Output Current 0.04% Line Regulation 0.2 % Load Regulation 100% Thermal Limit Burn-In Fast Transient Response Pin to Pin Compatible with LT1086 series
Applications
Post Regulators for Switching Supplies High Efficiency Linear Regulators Motherboards
Typical Application Circuit
VIN VOUT 1.5A COUT CIN VIN
GM66015-x.x
GND
GM66015-adj
ADJ R1
VOUT 1.5A
CIN
COUT
R2
Fixed Output Voltage Version
Adjustable Output Voltage Version
GM66015V1.00
1
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Marking Information and Pin Configurations (Top View)
SOT223 TO 252 (D-PAK) TO 220 TO 263 (D2-PAK)
GM66015 VVAYWW
GM66015 VVAYWW GM66015 VVAYWW
GM66015 VVAYWW
1.GND/ADJ
VV: Output Voltage Codes (05: 5.0V, ...A: ADJ) A: Assembly/Test Site Code Y: Year WW: Week
2. VOUT
3. VIN
1.GND/ADJ
2. VOUT
3. VIN
2. VOUT
1. GND/ADJ
3. VIN
2 VOUT
1. GND/ADJ
3. VIN
GM66015V1.00
2
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Ordering Information
Ordering Number GM66015-ATA3T GM66015-ATA3R GM66015-ATB3T GM66015-ATC3T GM66015-ATC3R GM66015-AST3T GM66015-AST3R GM66015-1.8TA3T GM66015-1.8TA3R GM66015-1.8TB3T GM66015-1.8TC3T GM66015-1.8TC3R GM66015-1.8ST3T GM66015-1.8ST3R GM66015-2.5TA3T GM66015-2.5TA3R GM66015-2.5TB3T GM66015-2.5TC3T GM66015-2.5TC3R GM66015-2.5ST3T GM66015-2.5ST3R GM66015-3.3TA3T GM66015-3.3TA3R GM66015-3.3TB3T GM66015-3.3TC3T GM66015-3.3TC3R GM66015-3.3ST3T GM66015-3.3ST3R GM66015-5.0TA3T GM66015-5.0TA3R GM66015-5.0TB3T GM66015-5.0TC3T GM66015-5.0TC3R GM66015-5.0ST3T GM66015-5.0ST3R 5.0V 3.3V 2.5V 1.8V Adj VOUT Package TO-263 TO-263 TO-220 TO-252 TO-252 SOT-223 SOT-223 TO-263 TO-263 TO-220 TO-252 TO-252 SOT-223 SOT-223 TO-263 TO-263 TO-220 TO-252 TO-252 SOT-223 SOT-223 TO-263 TO-263 TO-220 TO-252 TO-252 SOT-223 SOT-223 TO-263 TO-263 TO-220 TO-252 TO-252 SOT-223 SOT-223 Shipping 50 Units/Tube 800 Units / Reel 50 Units/Tube 80 Units/Tube 2,500 Units / Reel 80 Units/Tube 2,500 Units / Reel 50 Units/Tube 800 Units / Reel 50 Units/Tube 80 Units/Tube 2,500 Units / Reel 80 Units/Tube 2,500 Units / Reel 50 Units/Tube 800 Units / Reel 50 Units/Tube 80 Units/Tube 2,500 Units / Reel 80 Units/Tube 2,500 Units / Reel 50 Units/Tube 800 Units / Reel 50 Units/Tube 80 Units/Tube 2,500 Units / Reel 80 Units/Tube 2,500 Units / Reel 50 Units/Tube 800 Units / Reel 50 Units/Tube 80 Units/Tube 2,500 Units / Reel 80 Units/Tube 2,500 Units / Reel
GM66015V1.00
3
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Absolute Maximum Ratings
PARAMETER Input Voltage Power Dissipation Operating Junction Temperature Storage Temperature Lead Temperature 1.6mm (1/6 inch) from case for 10 seconds SYMBOL VI PD TJ Tstg RATINGS 15 Internally Limited - 40 to 125 - 60 to 150 260 UNITS V W C C C
Block Diagram
VIN
VOUT
ADJ
For fixed output Options GND
GM66015V1.00
4
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
GM7805 Electrical Characteristics (TI = 25C, Inless otherwise noted)
Parameter
Reference Voltage GM66015-A
Symbol
VREF
Test Condition
IOUT = 10mA, VIN - VOUT = 1.5V 10mA IOUT 1.5A, 3.3V VIN 7V IOUT = 10mA, VIN = 3.3V 10mA IOUT 1.5A, 3.3V VIN 7V IOUT = 10mA, VIN = 4V
Min
1.238 1.225 1.782 1.764 2.475 2.460 3.267 3.247 4.950 4.920
Typ
1.250 1.250 1.800 1.800 2.500 2.500 3.300 3.300 5.000 5.000
Max
1.262 1.275 1.818 1.836 2.525 2.540 3.333 3.353 5.050 5.080
Unit
V
GM66015-1.8
GM66015-2.5 Output Voltage GM66015-3.3 VO
10mA IOUT 1.5A, 4V VIN 7V IOUT = 10mA, VIN = 4.8V 10mA IOUT 1.5A, 4.8V VIN 7V IOUT = 10mA, VIN = 6.5V 10mA IOUT 1.5A, 6.5V VIN 7V IOUT = 10mA IOUT = 10mA, 3.3V VIN 7V
V
GM66015-5.0 GM66015-A GM66015-1.8 Line Regulation GM66015-2.5 GM66015-3.3 GM66015-5.0 GM66015-A GM66015-1.8 Load Regulation GM66015-2.5 GM66015-3.3 GM66015-5.0 Dropout Voltage Current Limit Minimum Load Current GM66015-1.8 Quiescent Current GM66015-2.5 GM66015-3.3 GM66015-5.0 Adjust Pin Current GM66015-A IADJ IQ VD ICL IO(MIN) VOL VOI
IOUT = 10mA, 4V VIN 7V IOUT = 10mA, 4.8V VIN 7V IOUT = 10mA, 6.5V VIN 7V VIN -VOUT =1.5V,10mA IOUT 1.5A VIN = 3.3V, 10mA IOUT 1.5A VIN = 4.0V, 10mA IOUT 1.5A VIN = 4,8V, 10mA IOUT 1.5A VIN = 6.5V, 10mA IOUT 1.5A IOUT = 1.5A VIN -VOUT =3V VIN = 5.0V VIN = 3.3V, 10mA IOUT 1.5A VIN = 4.0V, 10mA IOUT 1.5A VIN = 4,8V, 10mA IOUT 1.5A VIN = 6.5V, 10mA IOUT 1.5A IOUT = 10mA, 2.75V VIN 7V TA = 25C , 30ms Pulse 1.5
0.04
0.20
%
0.08
0.40
%
1.15 2.3 1.7
1.3 5.0
V A mA
5
13
mA
50
0.003
120
A
Ripple Rejection
RA
IOUT = 750mA, VIN - VOUT = 1.5V
60
80
dB
GM66015V1.00
5
Thermal Regulation
%/W
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Application Information
GM66015 series linear regulators provide fixed and adjustable output voltages at currents up to 5.0A. These regulators are protected against over-current conditions and include thermal shutdown protection. The GM66015 has a composite PNP-NPN output transistor and require an output capacitor for stability. A detailed procedure for selecting this capacitor is as below: Stability Considerations The output compensation capacitor helps to determine three main characteristics of a linear regulator's performance: start-up delay, load transient response, and loop stability. The capacitor value and type is based on cost, availability, size, and temperature constraints. A tantalum or aluminum electrolytic capacitor is preferred, as a film or ceramic capacitor with almost zero ESR can cause instability. An aluminum electrolytic capacitor is the least expensive type. But when the circuit operates at low temperatures, both the value and ESR of the capacitor will vary widely. For optimum performance over the full operating temperature range, a tantalum capacitor is the best. A 22F tantalum capacitor will work fine in most applications. But with high current regulators, such as GM66015 higher capacitance values will improve the transient response and stability. Most applications for Gm66015 involve large changes in load current, so the output capacitor must supply instantaneous load current. The ESR of the output capacitor causes an immediate drop in output voltage given by:
V = I x ESR In microprocessor applications an output capacitor network of several tantalum and ceramic capacitors in parallel is commonly used. This reduces overall ESR and minimizes the instantaneous output voltage drop under transient load conditions. The output capacitor network should be placed as close to the load as possible for the best results.
Protection Diodes When large external capacitors are used with most linear regulators, it is wise to add protection diodes. If the input voltage of the regulator is shorted, the output capacitor will discharge into the output of the regulator. The discharge current depends on the value of capacitor, output voltage, and rate at which VIN drops.
1N4002 1N4002
VIN
VOUT
VIN
GM66015-3.3
C1 GND C2 C1
GM66015-A
ADJ R1 C2
VOUT
CADJ
R2
(a) Fixed version
(b) Adjustable version
GM66015V1.00
Figure 1. Protection Diode Scheme for large Output Capacitors
For GM66015, the discharge path is through a large junction, and protection diodes are normally not needed. However, if the regulator is used with large output capacitance values and the input voltage is instantaneously shorted to ground, damage can occur. In this case, a diode connected as shown above in Figure 1 is recommended.
6
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Output Voltage Sensing
GM66015 series is a three-terminal regulator, so it cannot provide true remote load sensing. Load regulation is limited by the resistance of the conductors connecting the regulator to the load. For best results, GM66015 should be connected as shown 1n F1gure 2.
Conductor Parasitic RC Resistance
RLOAD
VIN
VOUT
VIN
VOUT
Conductor Parasitic RC Resistance
RLOAD
GM66015-3.3
GND
GM66015-A
ADJ
R1 R2
(a) Fixed version
(b) Adjustable version
Figure 2. Conductor Parasitic Resistance Effects are Minimized by this Grounding Scheme.
Calculating Power Dissipation and Heat Sink Requirements GM66015 series include thermal shutdown and current limit circuitry to protect the devices. However, high power regulators normally operate at high junction temperatures so it is important to calculate the power dissipation and junction temperatures accurately to be sure to use an adequate heat sink. The case is connected to VOUT on GM66015, so electrical isolation may be required for some applicat1ons. Thermal compound should always be used with high current regulators like GM66015. The thermal characteristics of an IC depend on four factors: 1. 2. 3. 4. Maximum Ambient Temperature TA (C) Power Dissipation PD (Watts) Maximum Junction Temperature TJ (C) Thermal Resistance Junction to amb1ent JA
The relationship of these four factors is expressed by equation (1): TJ = TA + PD x JA Maximum ambient temperature and power dissipation are determ1ned by the design while the maximum junction temperature and thermal resistance depend on the manufacturer and the package type. The maximum power dissipation for a regulator is expressed by equation (2): PD(MAX) = (VIN(MAX) - VOUT(MIN) ) x IOUT(MIN) + VIN(MIN) x IQ where: VIN(MAX) is the maximum input voltage, VOUT(MIN) is the minimum output voltage, IOUT(MAX) is the maximum output current IQ is the max1mum quiescent current at IOUT(MAX). A heat sink effect1vely increases the surface area of the package to improve the flow of heat away from the IC into the air. Each material in the heat flow path between the IC and the environment has a thermal resistance. Like series electrical resistances, these resistance are summed to determine JA, the total thermal resistance between the junction and the air. This is expressed by equation (3): JA = JC + CS + SA where: JC is the thermal resistance of Junction to Case, CS is the thermal resistance of Case to Heat Sink, SA is the thermal resistance of Heat Sink to Ambient air. The value for JA is calculated using equation (3) and the result can be substituted in equation (1). The value for CS is 3.5C/W for a given package typed based on an average d1ie size. For a high current regulator such as GM66015, the majority of the heat is generated in the power transistor sect1on.
GM66015V1.00
7
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Package Outline Dimensions - TO263
0.390 - 0.415 (9.906 - 10.541) 0.105 - 0.180 (4.191 - 4.572)
0.045 - 0.055 (1.143 - 1.397)
0.060 (1.524) TYP
15 TYP
0.330 - 0.370 (8.382 - 9.398)
0.143 + 0.012 0.143 - 0.002 (3.632 + 0305) (3.362 - 0.508)
0.059 (1.499) TYP 0.050 +/- 0.012 (1.270 +/- 0.305) 0.020 - 0.039 (0.510 - 0.990)
0.090 - 0.110 (2.286 - 2.794)
0.050 (1.270)
0.013 - 0.023 (0.330 - 0.584)
Package Outline Dimensions - TO252
0.039 - 0.050 (1.020 - 1.270) 0.055 - 0.080 (1.400 - 2.030) 0.018 - 0.023 (0.460 - 0.580)
0.205 - 0.215 (5.210 - 5.460)
SEATING PLAN
0.210 - 0.228 (5.330 - 5.800)
0.370 - 0.410 (9.400 - 10.420)
GM66015V1.00
0.090 (2.285) TYP 0.180 (4.570) TYP
0.045 - 0.060 (1.150 - 1.520) 0.030 - 0.045 (0.760 - 1.140)
0.020 (0.510) MIN 0.018 - 0.023 (0.460 - 0.580)
8
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Package Outline Dimensions - SOT223
0.248 - 0.264 (6.30 - 6.71) 0.116 - 0.124 (2.95 - 3.15) 0.010 - 0.014 (0.25 - 0.36)
1016 -
0.071 (1.8) MAX
0.264 - 0.287 (6.71 - 7.29)
0.130 - 0.146 (3.30 - 3.71)
0.0008 - 0.0040 (0.0203 - 0.1016) 10 - 16 0.012 (0.31) 0.090 (2.29) 0.033 - 0.041 (0.84 - 1.04) NOM 10 MAX
MIN
0.025 - 0.033 (0.64 - 0.84) 0.81 (4.6)NOM
NOM
GM66015V1.00
9
GM66015
1.5A LOW DROPOUT PRECISION REGULATOR
Ordering Number
GM 66015 - 1.8
APM Gamma Micro Circuit Type Output Voltages A: ADJ 1.8: 1.8V 2.5: 2.5V 3.3: 3.3V 5.0: 5.0V
TA3
Package Type TA3: TB3: TC3: ST3: TO263 TO220 TO252 SOT223
T
Shipping Type
T: Tube R: Tape & Reel
GM66015V1.00
8 10 10 6

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