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 the junction of the wide and narrow portion of
the output lead.
(3) VMAX = 40V for LM137, IP137, LM137A, IP137A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV
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 8377
Website: http://www.semelab-tt.com
Issue 2
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