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BL317L
3-TERMINAL ADJUSTABLE OUTPUT POSITIVE VOLTAGE
REGULATOR
BL317L
DESCRIPTION：
The BL317L is an Adjustable 3-terminal positive
voltage regulator capable of supplying in excess of
100mA over voltage range of 1.2V to 37V. This
voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output
voltage. What’s more, it employs internal current
limiting, thermal shutdown and safe area
compensation, making them essentially blow–out
proof.
The BL317L serves a wide variety of applications
including local, on card regulation. It can also be used
to make a programmable output regulator, or by
connecting a fixed resistor between the Adjustment
and output, the BL317L can be used as a precision
current regulator.
1
TO-92
FEATURES：







Output current in excess of 100mA
Output voltage Adjustable from 1.3V to 37V
Internal short circuit current limiting
Internal thermal overload protection
Output transistor safe-area compensation
Floating Operation for High Voltage Applications
Eliminates Stocking Many Fixed Voltages
ABSOLUTE MAXIMUM RATINGS：
Parameters
Input - Output Voltage Differential
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
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Symbol
VI-VO
PD
TJ
Tstg
Rating
40
Internal limited
-40~+125
-65~+150
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Units
V
W
C
C
V1.0
BL317L
BLOCK DIAGRAM：
Vin
300
300
300
3k
300
70
6.8V
6.8V
350
1.8k
8.67k
500
130
40
5.1k
200
10pf
6.3V
2k
6k
60
2.5
10pf
180 180
Vout
2.4k
12.8k
5
Adjust
ELECTRICAL CHARACTERISTICS：
（VI-VO=5V, -40C <Tj<125C, IO=40mA, IMAX=100mA,PMAX=625mW , unless otherwise specified）
Parameters
Symbol Figure Min Typ Max
Unit
1
Line Regulation , TA=25°С, 3.0V≤VI-VO≤40V
Regline
1
0.01 0.04
%/V
Load Regulation1, TA=25°С, 10mA≤IO≤Imax-BL317L
Vo≤5.0V
Regload
2
5.0
25
mV
Vo≥5.0V
0.1
0.5
%Vo
Adjustable Pin current
IAdj
3
50
100
μA
Adjustment Pin Current Change
1, 2
0.2
5.0
μA
IAdj
2.5V≤VI-VO≤40V, PD≤Pmax, 10mA≤IO≤Imax-BL317L
Reference Voltage
Vref
1.20 1.25 1.30
V
3
2.5V≤VI-VO≤40V, PD≤Pmax, 10mA≤IO≤Imax-BL317L
Line Regulation1, 3.0V≤VI-VO≤40V
Regline
1
0.02 0.07
%/V
1
Load Regulation , 10mA≤IO≤Imax-BL317L
Vo≤5.0V
Regload
2
20
70
mV
Vo≥5.0V
0.3
1.5
%Vo
Temperature Stability (Tlow≤TJ≤Thigh)
Ts
3
0.7
%Vo
Minimum Load Current to Maintain Regulation
IL(MIN)
3
3.5
10
mA
(VI-VO=40V)
Maximum output Current
VI-VO≤6.25V, PD≤Pmax
IMAX
3
100
200
mA
VI-VO≤40V, PD≤Pmax
20
RMS Noise, % of Vo, TA=25°С, 10Hz≤f≤10kHz
N
0.003
%/VO
Ripple Rejection2
RR
4
60
80
dB
VO＝1.2V, f=120Hz
80
CAdj=10uF, Vo=10.0V
Long-term Stability, TJ=Thigh3
%/1.0k
S
3
0.3
1.0
TA=25°С for Endpoint Measurements
Hrs.
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V1.0
BL317L
83
RJC
C/W
160
RJA
C/W
Notes: 1. Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating
effects must be taken into account separately. Pulse testing with low duty cycle is used.
2. CAdj, when used, is connected between the Adjustment pin and ground.
3. 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.
Thermal Resistance, Junction-to-Case
Thermal Resistance, Junction-to-Case
TEST CIRCUITS:
Figure 1. Line Regulation and ∆IAdj/Line Test Circuit
Figure 2. Load Regulation and ∆IAdj/Load Test Circuit
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BL317L
Figure 3. Standard Test Circuit
Figure 4. Ripple Rejection Test Circuit
TYPICAL CHARACTERISTICS PERFORMANCE:
Figure 5. Load Regulation
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Figure 6. Ripple Rejection
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BL317L
Figure 7. Current Limit
Figure 8. Dropout Voltage
Figure 9. Minimum operating Current
Figure 11. Temperature Stability
Figure 10. Ripple Rejection Versus Frequency
Figure 12. Adjustment Pin Current
Figure 13. Line Regulation
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Figure 14. Output Noise
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BL317L
Figure 15. Line Transient Response
Figure 16. Load transient Response
PACKAGE DIMENSIONS:
3.43
3.5±0.2
4.5±0.2
4.55±0.15
0.44±0.07
1.25±0.15
TO-92
Unit: mm
1.60
14.3±0.2
0.46±0.08
1.27
2.54±0.10
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