©2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
• Output Current in Excess of 1.5A
• Output Adjustable Between 1.2V and 57V
• Internal Therm al Over load Protection
• Internal Short Circuit Current Limitin g
• Output T r ansisto r Safe Area Compensation
• TO-220 Package
Description
This monolithic integrated circuit is an adjustable 3-terminal
positive voltage regulator designed to supply more than 1.5A
of load current with an output voltage adjustable 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
KA317AHV
3-Terminal Positive Adjustable Regulator
KA317AHV
2
Absolute Maximum Ratings
Electrical Characteristics
(VI-VO=5V, IO= 0.5A, 0°C ≤ TJ ≤ +125°C, IMAX = 1.5A, PDMAX =20W, unless otherwise specified)
Note :
1. Load and line regulation are specified at constant junction temperature. Change in VD due to heat ing eff ects mus t be tak en
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 ∆Vo/∆T ±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 - - 46 100 µA
Adjustable Pin Current Change ∆IADJ 3V ≤ VI - VO ≤ 60V
10mA ≤ IO ≤ IMAX
PD ≤ PMAX -2.05 µA
Reference Voltage 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
KA317AHV
3
Typical Performance Chara cte ristic s
Figur e 1. Load Regul ation
Figure 3. Dropout Voltage
Figu re 2. Adjus t ment Curre nt
Figure 4. Referenc e Volta ge
TEMPERATURE (°C)
OUTPUT VOLTAGE DEVIATION(%)
TEMPERATURE (°C)
INPUT-OUTPUT DIFFERENTIAL(V)
TEMPERATURE (°C)
ADJUSTMENT CURRENT(uA)
TEMPERATURE (°C)
REFERENCE VOLTAGE(V)
KA317AHV
4
Typical Application
Figure 5. Programmable Regulator
Ci 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. 1µ
µµ
µF
VI Vo
Vadj
R2
Iadj
VO
= 1.2 5 V (1+ R2/ R1)+Iadj
R2
R1
Iadj
Co
1µ
µµ
µF
Input Output
KA317HV
KA317AHV
5
Mechanical Dimensions
Package Dimensions in millimeters
4.50 ±0.20
9.90 ±0.20
1.52 ±0.10
0.80 ±0.10 2.40 ±0.20
10.00 ±0.20
1.27 ±0.10
ø3.60 ±0.10
(8.70)
2.80 ±0.1015.90 ±0.20
10.08 ±0.30 18.95MAX.
(1.70)
(3.70)(3.00)
(1.46)
(1.00)
(45°)
9.20 ±0.2013.08 ±0.20
1.30 ±0.10
1.30 +0.10
–0.05
0.50 +0.10
–0.05
2.54TYP
[2.54 ±0.20]2.54TYP
[2.54 ±0.20]
TO-220
KA317AHV
7/2/02 0.0m 001
Stock#DSxxxxxxxx
2002 Fairchild Semicond uctor Corporation
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FAIRCHILD’S PRODUCTS AR E NOT AUTHORIZED FOR USE AS C RITICAL COMPONENTS I N LIFE S UPPORT DEVICE S
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORA TION. As used he rein :
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 syst em who se failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effec tiv ene ss.
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DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRO DUCTS HEREIN TO IMPROVE RELIABILITY, FUN C TION OR DESIGN . FAIRCHILD DO ES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIG HTS, NOR THE RIGHTS OF OTHERS.v
Ordering Information
Product Number Package Operating Temperature
KA317AHV TO-220 0°C to +125°C
