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LM137K Datasheet PDF : 7 Pages
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NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS(1)(3) (TC = 25°C unless otherwise stated)
LM137A, IP137A, LM137AHV, IP137AHV
Symbols Parameters
Test Conditions
Min. Typ Max.
VREF
∆VOUT
∆VIN
∆ VOUT
∆IOUT
IADJ
∆IADJ
IMIN
ICL
∆VOUT
∆TEMP
∆ VOUT
∆TIME
en
Reference Voltage
Line Regulation (2)
Load Regulation (2)(3)
Thermal Regulation
Ripple Rejection
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Current Limit
Temperature Stability
IOUT = 10mA
10mA ≤ IOUT ≤ IMAX, P ≤ PMAX,
3V ≤ (VIN-VOUT) ≤ VMAX
-1.238 -1.250 -1.262
● -1.220 -1.250 -1.280
3V ≤ (VIN-VOUT) ≤ VMAX,
IOUT = 10mA
●
0.005 0.010
0.010 0.030
VOUT ≤ 5V
5
25
10mA ≤ IOUT ≤ IMAX
VOUT ≥ 5V
VOUT ≤ 5V
●
0.1 0.5
10
50
VOUT ≥ 5V ●
VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
VOUT = -10V
CADJ = 0
60
0.2 1.0
0.002 0.02
66
f = 120Hz
CADJ = 10µF ● 70
80
●
65
100
10mA ≤ IOUT ≤ IMAX
●
0.2
2
3V ≤ (VIN-VOUT) ≤ 40V
●
1.0
5
3V ≤ (VIN-VOUT) ≤ 50V (HV Series) ●
2
6
(VIN - VOUT) ≤ 40V
●
2.5
5
(VIN - VOUT) ≤ 10V
●
1.2
3
(VIN - VOUT) ≤ 15V
● 1.5
2.2
3.2
(VIN - VOUT) = 40V
● 0.24 0.4
1.0
(VIN - VOUT) = 50V (HV Series) ● 0.2
0.4
0.8
●
0.6 1.5
Long Term Stability
RMS Output Noise
(% of VOUT)
TA = 125°C, 1000Hrs
TA = 25°C, 10Hz ≤ f ≤ 10KHz
0.3 1.0
0.003
Units
V
%/V
mV
%
mV
%
%/W
dB
µA
mA
A
%
Notes
The ● denotes the specifications which apply over the full operating temperature range.
(1) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
(2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating
effects are covered under thermal regulation specifications. Load regulation is measured at 1/8” below the bottom of the package.
(3) VMAX = 40V for LM137, IP137, LM137A, IP137A, LM337, IP337, LM337A, IP337A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV, LM337HV, IP337HV, LM337AHV, IP337AHV
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com
Document Number 8380
Website: http://www.semelab-tt.com
Issue 1
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