IL317
1
IL317
THREE-TERMINAL ADJUSTABLE
OUTPUT POSITIVE VOLTAGE REGULATORS
The IL317 is adjustable 3-terminal positive voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
1.2 V to 37 V. These voltage regulator is exceptionally easy to use and
require only two external resistors to set the output voltage. Further, it
employ internal current limiting, thermal shutdown and safe area
compensation, making
them essentially blow-out proof.
The IL317 serve a wide variety of applications to make a
programmable output regulator, or by connecting a fixed resistor between
the adjustment and output, the IL317 series can be used as a precision
current requlator.
Output Current in Excess of 1.5 Ampere
Output Adjustable between 1.2 V and 37 V
Internal Thermal Overload Protection
Internal Short - Circuit Current Limiting Constant with Temperature
Output Transistor Safe-Area Compensation
Floating Operation for High Voltage Applications
Standard 3-lead Transistor Packages
Eliminates Stocking Many Fixed
Maximum ratings
Rating
Symbol
Value
Unit
Input - Output Voltage Differential
Vi - Vo
40
Vdc
Power Dissipation and Thermal Characteristics
PD
Internally Limited
Operating Junction Temperature Rang
TJ
-0 to +150
C
Storage Junction Temperature Rang
Tstg
-65 to +150
C
Pin 1. A just
2.
V out
3.
V in
(H eatsink
surface connected
to Pin 2.)
TO -220 A B
R 1
o
**
1F
A djust
R 2
in
*
0.1F
V out
V in
IL317
= C
in
is required if regulator is located an ap-
preciable distance from pow er supply filter.
= C
o
is
not needed for stability ; how ever, is
does im prove transient response.
Vout
V
R
R
R
ADJ
I
=
+
+
125 1
2
1
2
.
(
)
Since I
A D J
is controlled to less then 100 A, the
error associated w ith this term is negligible in m ost
applications.
Standard application
IL317
2
Electrical characteristics
(Vi-Vo= 5.0V, Io = 0.5 A, TJ = Tlow to Thigh (see Note 1); Imax = 1.5 A and Pmax = 20 W unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
Line Regulation (TA=+25
C)
3.0V
Vi - Vo 40 V
Regline
-
0.01
0.04
%/V
Load Regulation(TJ=+25
C)
10mA
IoImax,
Vin
5V
Vin
5 V
Regload
-
-
5.0
0.1
25
0.5
mV
%/Vo
Thermal Regulation (TA=+25
C)
20 ms Pulse
-
-
0.03
0.07
%/W
Adjustment Pin Current
IAdj
-
50
100
A
Adjustment Pin Current Change
2.5
Vi - Vo 40 V
10mA
IL Imax, PD Pmax
IAdj
-
0.2
5.0
A
Reference Voltage (Note 4)
3.0
Vi - Vo 40 V
10mA
IL Imax, PD Pmax
Vref
1.2
1.25
1.3
V
Line Regulation (Note 3)
3.0 V
Vi - Vo 40 V
Regline
-
0.02
0.07
%/V
Load Regulation (Note 3)
10mA
IoImax,
Vin
5V
Vin
5 V
Regload
-
-
20
0.3
70
1.5
%/V
%/V
Temperature Stability (Tlow
Tj Ttigh)
Ts
-
0.7
-
Minimum Load Current to
Maintain Regulation (Vi - Vo = 40 V)
ILmin
-
3.5
10
mA
Maximum Output Current
Vi - Vo
15 V , P 20 W
Vi - Vo = 40 V, P
20W, TA=+25C
Imax
1.5
0.15
2.2
0.4
-
-
A
RMS Nose , % of Vo
TA=+25
C, 10 Hz f 10 kHz
N
-
0.003
-
%/Vo
Ripple Rejection, Vo = 10 V, f = 120 Hz
(Note 5)
Without Cadj
Cadj = 10
F
RR
-
66
65
80
-
-
dB
Long-Term Stability, Tj = Thigh (Note 6)
TA=+25
C for Endpoint Measurements
S
-
0.3
1.0
%/1.0 k
Hrs.
Thermal Resistance Junction to Case
R
JC
-
5.0
-
C/W
Notes: (1) Tlow = 0
C , Thigh = +125 C
(2) Imax = 0.5 A , Pmax
(3) Load and line regulation are specified at constant junction tempereture. Changes in Vo due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
(4) Selected devices with tightened tolerance reference voltage available.
(5) Cadj , when used, connected between the adjustment pin and ground.
(6) Since Long - Term Stability cannot be measured on each device before shipment, this specification is an engineering
estimate of average stability from lot to lot.
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