PJ317
3-Terminal Adjustable Output Positive Voltage Regulator
T
•
•
•
•
he PJ317 is adjustable 3-terminal positive voltage
regulator capable of supplying in excess of 1.5 A
external resistors to set the output voltage. Further,
it
employs internal current limiting, thermal shutdown and
safe area compensation, making it essentially blow-out
proof.
over an output voltage range of 1.25 V to 37 V. This voltage
regulator is exceptionally easy to use and require only two
FEATURES
Output Current in Excess of 1.5 Ampere
Output Adjustable between 1.25 V and 37 V
Internal Thermal Overload Protection
Internal Short-Circuit Current Limiting
TO-220
TO-220 / TO-263 / TO-
92/ TO-252 / SOT-223
Pin 1. Adjust
2. Vout
3. Vin
Heatsink surface
connected to Pin2
TO-263
Constant with Temperature
•
•
•
•
Output Transistor Safe-Area Compensation
Floating Operation for High Voltage Applications
Standard 3-lead Transistor Packages
Eliminates Stocking Many Fixed Voltages
TO-92
TO-252
SOT-223
ORDERING INFORMATION
Device
Operating
Temperature
Package
Design
Load
Current
1.5A
1.5A
0.1A
0.5A
1A
0.3A
SOP-8
Pin 1. Vin
2. Vout
3. Vout
4. Adjust
5. Nc
6. Vout
7. Vout
8. Nc
PJ317CZ
PJ317CM
PJ317CT
PJ317CP
PJ317CW
PJ317CS
-20℃ to 85℃
TO-220
TO-263
TO-92
TO-252
SOT-223
SOP-8
CIRCUIT SCHEMATIC
STANDARD APPLICATION
* = Cin is required if regulator is located an appreciable distance from power supply filter.
** = Co is not needed for stability, however it does improve transient response.
V
out
= 1.25 V (1 + R
2
/ R
1
) + I
Adj
R
2
Since I
Adj
is controlled to less than 100
µA,
the error associated with this term is negligible in most applications
1-11
2002/10.rev.A
PJ317
3-Terminal Adjustable Output Positive Voltage Regulator
MAXIMUM RATINGS
RATING
Input-Output Voltage Differential
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
SYMBOL
V
I
- V
O
P
D
T
J
Tstg
VALUE
40
Internally Limited
-20 to + 85
-65 to +150
UNIT
Vdc
℃
℃
PJ317 ELECTRICAL CHARACTERISTICS
(V
I
-V
O
= 5.0 V; I
O
= 0.5A for TO-220 packages; T
J
=T
low
to T
high
[see Note 1]; I
max
and P
max
per Note 2; unless otherwise
specified.)
CHARACTERISTIC
Line Regulation (Note 3)
T
A
= 25
º
C
, 3.0 V
≤
V
I
-V
O
≤
40 V
Load Regulation (Note 3)
T
A
= 25℃
, 10 mA
≤
I
O
≤
I
max
, V
O
≤
5.0
V
O
≥
5.0
Thermal Regulation (T
A
= 25℃
)
20 ms Pulse
Adjustment Pin Current
Adjustment Pin Current Change , P
D
≤
P
max
10mA
≤
I
L
≤
I
max
, 2.5V
≤
V
I
- V
O
≤
40V
Reference Voltage (Note 4) , P
D
≤
P
max
10mA
≤
Io
≤
I
max
,, 3.0 V
≤
V
I
- V
O
≤
40 V
Line Regulation (Note 3) , 3.0 V
≤
V
I
- V
O
≤
40V
Current Limit (V
IN
-V
OUT
)
≤15V
Package CZ,CM
Package CW
Package CP
Package CS
Package CT
Temperature Stability (T
low
≤
T
J
≤
T
high
)
Minimum Load Current to
Maintain Regulation , (V
I
- V
O
= 40 V)
RMS Noise, % of V
O
T
A
=25℃, 10 H
Z
≤
f
≤
10 KH
Z
Long-Term Stability, T
J
= T
high
(Note 6)
T
A
=25℃ for Endpoint Measurements ,1000hrs
Thermal Resistance Junction to Case
FIGURE
1
2
SYMBOL
REGline
REGload
MIN.
--
--
--
--
--
--
1.20
--
TYP.
0.01
5.0
0.1
0.03
50
0.2
1.25
0.02
1.5
1
0.5
0.3
0.1
1
3.5
0.003
0.3
5.0
MAX.
0.04
25
0.5
0.07
100
5.0
1.30
0.07
UNIT
%/V
mV
%V
%W
µA
µA
V
%V
3
1.2
3
1
△I
Adj
I
Adj
V
ref
REGline
A
3
3
--
3
--
T
S
I
Lmin
N
S
R
θJC
--
--
--
--
--
--
10
--
1.0
--
%
mA
%
%
℃
/W
NOTES:
(1) T
low
= -20℃
T
high
= + 85℃
(2) I
max
= 1.5 A
P
max
: TO-220=20W, TO-263=3W, TO-252=2W, SOP-8=0.625W, TO-92=0.625W, SOT-
23=0.625W
(3) Load and line regulation are specified at constant junction temperature. Changes in V
O
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) C
Adj
, when used, is 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.
2-11
2002/10.rev.A
PJ317
3-Terminal Adjustable Output Positive Voltage Regulator
SCHEMATIC DIAGRAM
FIGURE 1- LINE REGULATION AND LINE TEST CIRCUIT
3-11
2002/10.rev.A
PJ317
3-Terminal Adjustable Output Positive Voltage Regulator
4-11
2002/10.rev.A
PJ317
3-Terminal Adjustable Output Positive Voltage Regulator
FIGURE 5-LOAD REGULATION
FIGURE 6-CURRENT LIMIT
FIGURE 7-ADJUSTMENT PIN CURRENT
FIGURE 8-DROPOUT VOLTAGE
FIGURE 9-TEMPERATURE STABILITY
CURRENT
FIGURE 10-MINIMUM OPERATING
5-11
2002/10.rev.A
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