©2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.2
Features
Output Current in Excess of 1.5A
Output Adjustable Between 1. 2V and 57V
Internal Thermal Overload Protection
Internal Short Circui t Current Limiting
Output Transistor Safe Area Compensation
TO-220 Package
Description
This monolithic integrated circuit is an ad justable 3-termi nal
positive voltage regulator designed to supply more than 1.5A
of load current with an output voltage adjustabl e over a 1.2
to 57V. It employs internal current limiting, thermal shut
down and safe area compensation.
TO-220
1. Adj 2. Output 3. Input
1
Output
23
Internal Block Diagram
Rlimit
3Vin
Vo
1
Voltage
Reference
Vad
j
2
Protection
Circuitry
+
-
Input
Output
LM317AHV
3-Terminal Positive Adjustable Regulator
LM317AHV
2
Absolute Maximum Ratings
Electrical Characteristics
(VI-VO=5V, IO= 0.5A, 0°C TJ + 125°C, IMAX = 1.5A, PDMAX = 20W, unless othe rwis e sp ecif ied )
Note :
1. Load and line re gulation are specified at constant junction temperature. Change in VD du e to heating effects must be taken
into account separately. Pulse testing with low duty is used. (PMAX = 20W)
2. CADJ, when used, is connected between the adjustment pin and ground.
Parameter Symbol Value Unit
Input-Output Voltage Differential VI - VO60 V
Lead Temperature TLEAD 230 °C
Power Dissipation PDInternally limited W
Operating Junction Temperature Range Tj0 ~ +125 °C
Storage Temperature Range TSTG -65 ~ +125 °C
Temperature Coefficient of Output Voltage ΔVo/ΔT ±0.02 %/°C
Parameter Symbol Conditions Min. Typ. Max. Unit
Line Regulation (Note1) Rline TA = +25°C
3V VI - VO 60V - 0.01 0.04 %/V
3V VI - VO 60V - 0.02 0.07 %/V
Load Regulation (Note1) Rload
TA = +25°C, 10mA IO IMAX
VO< 5V
VO 5V -18
0.4 25
0.5 mV
%/VO
10mA IO IMAX
VO < 5V
VO 5V -40
0.8 70
1.5 mV
%/VO
Adjustable Pin Current IADJ --46100μA
Adjustable Pin Current Change ΔIADJ 3V VI - VO 60V
10mA IO IMAX, PD PMAX -2.05 μA
Reference Volt ag e VREF 3V VIN - VO 60V
10mA IO IMAX, PD PMAX 1.20 1.25 1.30 V
Temperature Stability STT--0.7-%/V
O
Minimum Load Current to Maintain
Regulation IL(MIN) VI - VO = 60V - 3.5 12 mA
Maximum Output Current IO(MAX) VI - VO 15V, PD PMAX
VI - VO 60V, PD PMAX
TA = 25°C1.0 2.2
0.3 -A
RMS Noise, % of VOUT eNTA= +25°C, 10Hz f 10kHz - 0.003 0.01 %/VO
Ripple Rejection RR VO = 10V, f = 120Hz
without CADJ
CADJ = 10μF (Note2) 66 60
75 -dB
Long-Term Stability, TJ = THIGH ST TA = +25°C for end point
measurements, 1000HR -0.31 %
Thermal Resistance Junction to Case RθJC --5-°C/W
LM317AHV
3
Typical Performance Characteristics
Figure 1. Load Regulation
Figure 3. Dropout Voltage
Figure 2. Adjustment Current
Figure 4. Reference Voltage
TEMPERATURE (°C)
OUTPUT VOLTAGE DEVIATION(%)
TEMPERATURE (°C)
INPUT-OUTPUT DIFFERENTIAL(V)
TEMPERATURE (°C)
ADJUSTMENT CURRENT(uA)
TEMPERATURE (°C)
REFERENCE VOLTAGE(V)
LM317AHV
4
Typical Application
Figure 5. Programmable Regulator
•C
i is required when regulator is located an appreciable distance from power supply filter.
Co is not needed for stability, however, it does improve transient response.
Since IADJ is controlled to less than 100μA , the error associated with this term is negligible in most applications.
VI
KA317
Ci
0. 1μF
VI Vo
Vadj
R2
Iadj
VO
= 1.25V (1+ R2/ R1)+Iadj
R2
R1
Iadj
Co
1μF
Input Output
LM317HV
LM317AHV
5
Mechanical Dimensions
Package Dimensions in millimeters
TO-220 [ SINGLE GAUGE ]
LM317AHV
7/3/09 0.0m 001
Stock#DS400516
© 2009 Fairchild Semiconductor Corporation
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1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
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Ordering Information
Product Number Package Operating Temperature
LM317AHVT TO-220 0°C to +125°C