TERMINAL ADJUSTABLE REGULATOR Power Management GM317 adjusta

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TERMINAL ADJUSTABLE REGULATOR Power Management GM317 adjusta

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GM317
TERMINAL ADJUSTABLE REGULATOR
Power Management
GM317 adjustable 3-terminal positive voltage regulator capable supplying excess over output voltage range This voltage regulator exceptionally easy requires only external resistors output voltage. Further, employs internal current limiting, thermal shutdown safe area compensation, making essentially blow-out proof. GM317 serves wide variety applications including local, card regulation. This device also used make programmable output regulator, connecting fixed resistor between adjustment output, GM317 used precision current regulator.
Features
Output current 1.5A 3-Terminal Regulators Input Regulation typ. 0.01% input Output Regulation typ. 0.1% Peak Output Current Constant over Temperature Range Regulator Wide Range Output Voltages 1.2V Available TO-220 TO-263 Packages Ripple Rejection Typically 80dB Direct replacements LM317
TYPICAL APPLICATION
GM317
VOUT
VOUT 240W
CIN* 0.1µF
IADJ
required regulator located appreciable distance from power supply filter. **CO needed stability, however, improve transient response. VOUT= 1.25V IADJR2
Since IADJ controlled less than 100µA, error associated with this term negligible most applications.
www.gammamicro.com
PRELIMINARY
GM317
Revision Feb. 2004
GM317 MARKING INFORMATION CONFIGURATIONS
TO-263-2 PAK)
TO-220
GM317
AYWW
GM317
AYWW
OUTPUT
INPUT OUTPUT INPUT
Assemble Location Year Work weeks
ORDERING INFORMATION
Ordering Number
GM317TA3T GM317TA3R GM317TB3T
Package
TO-263 TO-263 TO-220
Shipping
Units Tube Units Tape Reel Units Tube
detail Ordering Number identification, please last page.
GM317
GM317
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Output Differential Voltage, Continuous Total Dissipation 25°C free-air temperature Continuous Total Dissipation bellow) 25°C case temperature Operating free-air, case, virtual junction Temperature Range Storage Temperature Range Lead Temperature 1.6mm (1/16 inch) from case sec.
VALUE
UNIT
+125 +150
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Output Current, Operating virtual junction temperature,
1500
UNIT
SCHEMATIC DIAGRAM
5.6K 6.3V 125K 12.4K 6.7K 6.8K 5.1K 6.3V 3.6K 5.8K 2.4K 12.5K VOUT
6.3V
This device contains active transistors.
GM317
GM317
ELECTRICAL CHARACTERISTICS
over recommended ranges operating virtual junction temperature, unless otherwise noted. PARAMETER
Input Regulation (Note
TEST CONDITIONS*
(Note 10mA 1.5A 10V, 120H 10V, 120H, 10µF capacitor between ground 10mA 1.5A 25°C (Note 10mA 1.5A (Note
0.01 0.02
0.04
Unit
0.07
Ripple Rejection
0.003
Output Regulation
Output Voltage Change with Temperature Output Voltage Long-Term Drift (Note Output Noise Voltage Minimum Output Current maintain Regulation Adjustment-Termainal Current Adjustment-Termainal Current Change Reference Voltage (Output ADJ) 2.5V 40V, 10mA 1.5A 40V, 10mA 1.5A, 40V, 25°C 0.15 After 1000h 10Hz 10kHz, 25°C
1.25
Peak Output Current
Unless otherwise noted, these specifications apply following test conditions: 0.5A. conditions shown MAX, appropriate value specified under recommended operating conditions. Note characteristics measured with 0.1µF capacitor across input capacitor across output. Note Input regulation expressed here percentage change output voltage change input. Note Pulse testing techniques used mantain junction temperature close ambient temperature possible. Thermal effects must taken into account separately. Note Since long-term drift cannot measured individual devices prior shipment, this specification intended guarantee warranty. engineering estimate average drift expected from lot.
GM317
GM317
Typical Performance Characteristics
DVOUT, Output Voltage Change -0.2 -0.4 -0.6 -0.8 -1.0 IOUT, Output Current IADJ, Adjustment Current (µA) Junction Temperature (°C)
0.5A
25°C
1.5A VIN= VOUT=
Junction Temperature (°C)
150°C
-55°C
VOUT, Input Output Voltage Differential(Vdc)
Figure Load Regulation
Figure Current Limit
Figure Adjustment Current
DVOUT= 100mV Quiescent Current (mA) 1.5A
Ripple Rejection (dB)
-55°C
CADJ= 10µA
VOUT, Input Output Voltage Differential (Vdc)
Without CADJ
1.0A 500mA
25°C 150°C
200mA 20mA Junction Temperature (°C)
VOUT= 500mA
120Hz 25°C
VOUT, Output Voltage
Figure Dropout Voltage
VOUT, Input Output Voltage Differential (Vdc)
Figure Minimum Operating Current
Figure Ripple Rejection versus Output Voltage
Ripple Rejection (dB)
500mA VIN= VOUT= 25°C
CADJ= 10µF Without CADJ
1.0k 100k 1.0M Frequency (Hz)
Figure Ripple Rejection Versus Frequency
GM317
GM317 APPLICATION INFORMATION
Basic Circuit Operation GM317 terminal floating regulator. operation, GM317 develops maintains nominal 1.25V reference (Vref) between output adjustment terminals. This reference voltage converted programming current flows through ground. regulated output voltage given
VOUT= Vref IADJ
External Capacitors 0.1µF disc 1.0µF tantalum input bypass capacitor (CIN) recommended reduce sensitivity input line impedance. adjustment terminal bypassed ground improve ripple rejection. This capacitor (CADJ) prevents ripple from being amplified output voltage increased. 10µF capacitor should improve ripple rejection about 120Hz application. Although GM317 stable with output capacitance, like feedback circuit, certain values external capacitance cause excessive ringing. output capacitance (CO) form 1.0µF tantalum 25µF aluminum electrolytic capacitor output swamps this effect insures stability. Protection Diodes When external capacitors used with regulator sometimes necessary protection diodes prevent capacitors from discharging through current points into regulator.
Since current from adjustment terminal (IADJ) represents error term equation, GM317 designed control IADJ less than 100µA keep constant. this, quiescent operating current returned output terminal. This imposes requirement minimum load current. load current less than this minimum, output voltage will rise. Since GM317 floating regulator, only voltage differential across circuit which important performance, operation high voltages with respect ground possible.
VOUT VOUT
GM317
Figure shows GM317 with recommended protection diodes output output voltage excess 25Vor high capacitance values 25µF, CADJ 10µF). Diode prevents from discharging thru during input short circuit. Diode protects against capacitor CADJ discharging through during output short circuit. combination diodes prevents CADJ from discharging through during input short circuit.
1N4002 GM317 VOUT 1N4002
Vref Adjust
IPROG
IADJ
VOUT
Vref= 1.25V Typical Figure Basic Circuit Configuration Load Regulation GM317 capable providing extremely good load regulation, precautions needed obtain maximum performance. best performance, programming resistor (R1) should connected close regulator possible minimize line drops which effectively appear series with reference, thereby degrading regulation. groung returned near load ground provide remote ground sensing improve load regulation.
GM317
Adjust
CADJ
Figure Voltage Regulator with Protection Diodes
GM317
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
15.3 0.20 0.20
1.27 0.10 2.54 (2.54 0.20)
4.90 0.20 0.90 0.10 0.40 0.90 8.70 3.70 0.20 15.90 0.20 4.60 18.95 8.40 3.00 10.08 0.30 0.80 0.10 1.52 0.10
2.00 0.10
0.42 10.66
0.24 6.096
0.75 R0.30
Inches
0.45
9.20 0.20
10.00 0.20
4.90 0.20
Unit:
TO-220-3 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 2.80 0.10 4.50 0.20
+0.1 1.30 -0.05
1.46 1.00 13.08 0.20 1.27 0.10
0.50 -0.05
+0.1
2.54 (2.54 0.20)
2.40 0.20
Unit:
10.00 0.20
GM317
3-R0.2
GM317
ORDERING NUMBER
Gamma Micro. Circuit Type Shipping Tape Reel Tube
Package TA3: TO-263 TB3: TO-220
GM317

TERMINAL ADJUSTABLE REGULATOR Power Management GM317 adjusta

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