1.0A PRECISION LINEAR REGULATORS Power Management GM1117 ser

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1.0A PRECISION LINEAR REGULATORS Power Management GM1117 ser

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GM1117
1.0A PRECISION LINEAR REGULATORS
Power Management
GM1117 series positive adjustable fixed regulators designed provide 1.0A output with dropout voltage performance. On-chip trimming adjusts reference voltage them work post regulators microprocessor power supplies where voltage operation fast transient response required. Pin-to-pin compatible with LT1086 family regulators, GM1117's available surface-mount SOT-223 TO-252 packages.
Features
Adjustable Fixed Output Output Current 1.0A Dropout Voltage (max.) 1.3V 1.0A Line Regulation 0.2% max. Load Regulation 0.4% max. Fast Transient Response Current Limit Protection Thermal Shutdown Protection
Application
High Efficiency Linear Regulators Post Regulators Switching Supplies Microprocessor Supply Hard Drive Controllers Battery Chargers Adjustable Power Supply
TYPICAL APPLICATION CIRCUITS
(Adjustable Version)
(Fixed Version)
VOUT= 3.45V
VIN> 4.75V
VOUT
133W 1.0% 232W 1.0%
VIN> 4.75V
VOUT= 3.3V
10µF Tant
10µF Tant.
10µF Tant
10µF Tant.
VOUT= VREF
IADJ
Notes: needed device from filter capacitors minimum value required stability www.gammamicro.com
PRELIMINARY
GM1117
Revision May. 2004
GM1117-Adj
GM1117-3.3 VOUT
GM1117 MARKING INFORMATION CONFIGURATIONS (Top View)
TO-252 (DPAK) TO-220
TO-263-2 PAK)
SOT-223
GM1117 VVAYWW
GM1117
VVAYWW
GM1117
VVAYWW
GM1117
VVAYWW
VOUT
ADJ/ GND*
VOUT
ADJ/ GND* V/VVV Output Voltage 5.0V, 285= 2.85V =Adj Assembly Location Year Work Week
VOUT
ADJ/ GND*
VOUT ADJ/GND*
fixed versions GND, adjustable versions VOUT
ORDERING INFORMATION
Ordering Number
GM1117-AST3T GM1117-AST3R GM1117-ATC3T GM1117-ATC3R GM1117-ATB3T GM1117-ATA3T GM1117-ATA3R GM1117-1.5ST3T GM1117-1.5ST3R GM1117-1.5TC3T GM1117-1.5TC3R GM1117-1.5TB3T GM1117-1.5TA3T GM1117-1.5TA3R GM1117-1.8ST3T
Output Voltage
Package
SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263
Shipping
Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel
GM1117
GM1117-1.8ST3R GM1117-1.8TC3T GM1117-1.8TC3R GM1117-1.8TB3T GM1117-1.8TA3T GM1117-1.8TA3R
detail Ordering Number identification, please last page.
GM1117 ORDERING INFORMATION (Continued)
Ordering Number
GM1117-2.5ST3T GM1117- ST3R GM1117-2.5TC3T GM1117-2.5TC3R GM1117-2.5TB3T GM1117-2.5TA3T GM1117-2.5TA3R GM1117-2.85ST3T GM1117- 2.85 ST3R GM1117-2.85TC3T GM1117-2.85TC3R GM1117-2.85TB3T GM1117-2.85TA3T GM1117-2.85TA3R GM1117-3.0ST3T GM1117- ST3R GM1117-3.0TC3T GM1117-3.0TC3R GM1117-3.0TB3T GM1117-3.0TA3T GM1117-3.0TA3R GM1117- ST3T GM1117- ST3R GM1117-3.3TC3T GM1117-3.3TC3R GM1117-3.3TB3T GM1117-3.3TA3T GM1117-3.3TA3R GM1117-5.0ST3T GM1117- ST3R GM1117-5.0TC3T GM1117-5.0TC3R GM1117-5.0TB3T GM1117-5.0TA3T GM1117-5.0TA3R
Output Voltage
2.85 2.85 2.85 2.85 2.85 2.85 2.85
Package
SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263
Shipping
Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube 2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel Units Tube 2,500 Units Tape Reel
2,500 Units Tape Reel Units Tube Units Tube Units Tape Reel
detail Ordering Number identification, please last page.
GM1117
Units Tube
GM1117
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Dissipation
Input Voltage Lead Temperature(Soldering, 10sec)
SYMBOL
TLEAD TSTG
VALUE
Internally limited
UNIT
Operating Junction Temperature Range Control Section Power Transistor Storage Temperature Range
Damage Threshold Thermal Characteristics SOT-223 Thermal Resistance, Junction-to-Case DPAK Thermal Resistance, Junction-to-Case Thermal Resistance, Junction-to-Case
RqJC
BLOCK DIAGRAM (Fixed Version)
VOUT
Thermal Shutdown Bandgap Reference
Error Amplifier
Output Current Limit
(Adjustable Version)
VOUT
GM1117
Thermal Shutdown Bandgap Reference
Error Amplifier
Output Current Limit
GM1117
ELECTRICAL CHARACTERISTICS
(Typicals limits appearing normal type apply 25°C) Parameter
Reference Voltage GM1117-Adj GM1117-1.8 GM1117-2.5 Output Voltage GM1117-3.3 GM1117-5.0 GM1117-Adj GM1117-1.8 Line Regulation GM1117-2.5 GM1117-3.3 GM1117-5.0 GM1117-Adj GM1117-1.8 Load Regulation GM1117-2.5 GM1117-3.3 GM1117-5.0 Dropout Voltage Current Limit Minimum Load Current GM1117-Adj GM1117-1.8 GM1117-2.5 Quiescent Current GM1117-3.3 GM1117-5.0 Adjust Current Temp. Coefficient Thermal Regulation Ripple Rejection GM1117-Adj IADJ REGLOAD REGLINE
Symbol
VREF
Condition
IOUT=10mA, VIN= 10mA IOUT 1.0A, 2.65V IOUT=10mA, VIN=3.3V IOUT 1.0A, 3.3V IOUT=10mA, VIN=4V IOUT 1.0A, IOUT=10mA, VIN=4.8V IOUT 1.0A, 4.8V IOUT=10mA, VIN=6.5V IOUT 1.0A, 6.5V 1.0A IOUT=10mA, 2.75V IOUT=10mA, 3.3V IOUT=10mA, IOUT=10mA, 4.8V IOUT=10mA, 6.5V
1.238 1.225 1.782 1.764 2.475 2.450 3.267 3.234 4.950 4.900
1.250 1.250 1.800 1.800 2.500 2.500 3.300 3.300 5.000 5.000 0.04 0.04 0.04 0.04 0.04 0.20 0.20 0.20 0.20 0.20 1.15
1.262 1.275 1.818 1.836 2.525 2.550 3.333 3.366 5.050 5.100 0.20 0.20 0.20 0.20 0.20 0.40 0.40 0.40 0.40 0.40
Unit
VIN-VOUT=1.5V, 10mA VIN=3.3V, 10mA VIN=4.0V, 10mA VIN=4.8V, 10mA VIN=6.5V, 10mA 1.0A 1.0A 1.0A 1.0A
IOUT=1.0A VIN-VOUT=3V VIN=5V
VIN=3.3V, 10mA VIN=4.0V, 10mA VIN=4.8V, 10mA VIN=6.5V, 10mA 1.0A 1.0A 1.0A 1.0A
%/°C
IOUT=10mA, 2.75V
0.005 0.003
VIN-VOUT=1.5V, IOUT=10mA TA=25°C, 30ms pulse VIN-VOUT=1.5V, IOUT=1.0A
GM1117
GM1117
GM1117 VOUT VREF VOUT
APPLICATION INFORMATION
GM1117 series linear regulators provide fixed adjustable output voltages currents 1.0A. These regulators protected against overcurrent conditions include thermal shutdown protection. GM1117's have composite PNP-NPN output transistor require output capacitor stability. detailed procedure selecting this capacitor follows.
IAdj CAdj
Figure Resistor Divider Scheme
Adjustable Operation
GM1117 output voltage range 1.25 external resistor divider sets output voltage shown Figure regulator maintains fixed 1.25V (typical) reference between output adjust pin. resistor divider network causes fixed current flow ground. This current creates voltage across that adds 1.25 across sets overall output voltage. adjust current (typically also flows through adds small error that should taken into account precise adjustment VOUT necessary. output voltage according formula: VOUT VREF IAdj
Stability Considerations
output compensation capacitor helps determine three main characteristics linear regulator's performance: start-up delay, load transient response, loop stability. capacitor value type based cost, availability, size temperature constraints. tantalum aluminum electrolytic capacitor preferred, film ceramic capacitor with almost zero cause instability. aluminum electrolytic capacitor least expensive type, when circuit operates temperatures, both value capacitor will vary widely. optimum performance over full operating temperature range, tantalum capacitor best. 22µF tantalum capacitor will work fine most applications, with high current regulators such GM1117 higher capacitance values will improve transient response stability. Most applications GM1117's involve large changes load current, output capacitor must supply instantaneous load current. output capacitor causes immediate drop output voltage given
term IAdj represents error added adjust current. chosen that minimum load current least should same type, e.g. metal film best tracking over temperature. While required, bypass capacitor from adjust ground will improve ripple rejection
microprocessor applications output capacitor network several tantalum ceramic capacitors parallel commonly used. This reduces overall minimizes instantaneous output voltage drop under transient load conditions. output capacitor network should placed close load possible best results. Used with large output capacitance values input voltage instantaneously shorted ground, damage occur. this case, diode connected shown above Figure
GM1117
transient response. tantalum capacitor recommended "first cut" design. Type value varied obtain optimum performance price.
GM1117
Protection Diodes
When large external capacitors used with most linear regulator wise protection diodes. input voltage regulator shorted, output capacitor will discharge into output regulator. discharge current depends value capacitor, output voltage rate which drops.
Figure (a),(b) Protection Diode Scheme Large Output Capacitors Fixed Version
Output Voltage Sensing
GM1117 series three terminal regulators, they cannot provide true remote load sensing. Load regulation limited resistance conductors connecting regulator load. best results GM1117 should connected shown Figure
Conductor Parasitic Resistance RLOAD
VOUT
GM1117-3.3 Fixed Version
IN4002 VOUT VOUT VOUT Adjustable Version Adjustable Version
Figure (a),(b) Conductor Parasitic Resistance Effects Minimized this Grounding Scheme Fixed Adjustable Output Regulators
GM1117-3.3
Conductor Parasitic Resistance RLOAD
GM1117-Adj
IN4002 VOUT VOUT GM1117-Adj CADJ
Calculating Power Dissipation Heat Sink Requirements
GM1117 series precision linear regulators include thermal shutdown current limit circuitry protect devices. However, high power regulators normally operate high junction temperatures important calculate power dissipation junction temperatures accurately sure that adequate heat sink. case connected VOUT GM1117, electrical isolation required some applications. Thermal compound should always used with high current regulators like GM1117.
GM1117 linear regulators, discharge path through large junction, protection diodes normally needed. However, regulator used with large output capacitance values input voltage instantaneously shorted ground, damage occur. this case, diode connected shown above Figure
GM1117
GM1117
thermal characteristics depend four factors: Maximum Ambient Temperature (°C) Power Dissipation (Watts) Maximum Junction Temperature (°C) Thermal Resistance Junction ambient RQJA (°C/W) These relationship these four factors expressed equation (1):
RQJA .(1)
Maximum ambient temperature power dissipation determined design while maximum junction temperature thermal resistance depend manufacturer package type. maximum power dissipation regulator expressed equation (2): PD(max) VIN(max)- VOUT(min) IOUT(max) VIN(max)IQ .(2) where: VIN(max) maximum input voltage, VOUT(min) minimum output voltage, IOUT(max) maximum output current maximum quiescent current IOUT(max). heat sink effectively increases surface area package improve flow heat away from into air. Each material heat flow path between environment thermal resistance. Like series electrical resistances, these resistance summed determine RQJA total thermal resistance between junction air. This expressed equation (3): RQJA RQJC .(3) Where following °C/W: RQJC thermal resistance junction case, RQCS thermal resistance case heat sink, RQSA thermal resistance heat sink ambient value RQJA calculated using equation result substituted equation (1). value RQJC 3.5°C/W given package type based average size. high current regulator such GM1117 majority heat generated power transistor section.
GM1117
GM1117
Typical Performance Characteristics
1.00
0.10
TCASE
Output Voltage Deviation
0.08 0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10
0.95
TCASE 25°C
VDROPOUT
0.90
0.85
0.80
TCASE 125°C
0.75
1000
-0.12
(°C)
IOUT(mA)
Figure Dropout Voltage Output Current
Figure Reference Voltage Temperature
Adjust Current(µA)
10mA
Ripple Rejection(dB)
TCASE 25°C 1.0A (VIN VOUT) 3.0V VRIPPLE 1.0VP-P Cadj =0.1µF
Temperature (°C)
Frequency(Hz)
Figure Adjust Current Temperature
Figure Ripple Rejection Frequency
Load Step(mA) Voltage Deviation(mV)
-100 -200 1000
Time(µS)
VOUT 3.3V COUT 22µF Tantalum CAdj =0.1µF
VOUT(V)
Figure Transient Response
Figure Short Circuit Current VIN-VOUT
GM1117
GM1117
TO-252-3 PACKAGE OUTLINE DIMENSIONS
6.50 0.05 5.340 0.05 0.5°
2.30 0.05 0.508 0.0127
Layout
0.05
0.244 6.20
6.10 0.05 7.20 0.05
0.75 0.10 0.89 0.05 0.81 0.038
0.25 0.13 R0.15 0.05 0~0.075 2.30TYP 0.70 0.05
0.070 0.05 9.900 0.75 0.10 2.70 0.10 1.525 0.10
0.228 5.80
0.118
0.243 6.172
0.101 2.58
0.063
Inches
Unit:
SOT- PACKAGE OUTLINE DIMENSIONS
1.80max 0.05 1.75 0.10 0.60 0.65 0.10
0.10 0.15
1.75 0.10
GM1117
0.95TYP
0.10
0.06 0.04
Layout
0.15
0.079
0~10° 0.079
0.091
0.091
0.248
0.84 0.46 6.50 0.10
0.059
0.059
0.059
Inches
Unit:
GM1117 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 8.70 2.80 0.10 4.50 0.20
+0.1 1.30 -0.05
8.40 1.46 1.00 3.00
10.08 0.30
1.27 0.10
2.54 (2.54 0.20)
0.80 0.10 1.52 0.10
3-R0.2
13.08 0.20
0.50 -0.05
+0.1
2.40 0.20
Unit:
10.00 0.20
TO-263-2 PACKAGE OUTLINE DIMENSIONS
9.90 0.20 0.40 1.20 1.50 DP0.20 9.20 0.20 4.50 0.20 1.30 -0.05
+0.1
Layout
0.63 17.02 0.33 8.38 0.10 0.01 R0.30 2.40 0.20 2.54 0.10 0.50 -0.05 10.0 0.20 0.04 1.016
+0.1
0.12 3.05
0.20
1.27 0.10 2.54 (2.54 0.20)
0.40
0.90
Inches
0.45
9.20 0.20
10.00 0.20
4.90 0.20
Unit:
GM1117
4.90 0.20 0.90 0.10
15.3 0.20
2.00 0.10
0.42 10.66
0.24 6.096
0.75 R0.30
GM1117
ORDERING NUMBER
1117
Gamma Micro. Shipping Tape Reel Tube
Circuit Type
Output Voltage Adj, 1.5: 1.5V 1.8: 1.8V, 2.5: 2.5V 2.85: 2.85V, 3.0: 3.0V 3.3: 3.3V, 5.0: 5.0V
Package TC3: TO-252 TB3: TO-220 TA3: TO-263-2 ST3: SOT-223
GM1117

1.0A PRECISION LINEAR REGULATORS Power Management GM1117 ser

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