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