LM137K View Datasheet(PDF) - Semelab - > TT Electronics plc
Part Name
Description
Manufacturer
LM137K Datasheet PDF : 7 Pages
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NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS(1)(3) (TC = 25°C unless otherwise stated)
LM137, IP137, LM137HV, IP137HV
Symbols Parameters
Test Conditions
Min. Typ Max.
VREF
∆VOUT
∆VIN
Reference Voltage
Line Regulation (2)
IOUT = 10mA
10mA ≤ IOUT ≤ IMAX, P ≤ PMAX,
3V ≤ (VIN-VOUT) ≤ VMAX
3V ≤ (VIN-VOUT) ≤ VMAX,
IOUT = 10mA
-1.225 -1.250 -1.275
• -1.200 -1.250 -1.300
0.010 0.020
•
0.020 0.050
∆ VOUT
∆IOUT
IADJ
∆IADJ
IMIN
ICL
∆VOUT
∆TEMP
∆ VOUT
∆TIME
en
VOUT ≤ 5V
15
25
Load Regulation (2)(3)
10mA ≤ IOUT ≤ IMAX
VOUT ≥ 5V
VOUT ≤ 5V
•
0.3
0.5
20
50
Thermal Regulation
Ripple Rejection
VOUT ≥ 5V •
VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
VOUT = -10V
CADJ = 0
f = 120Hz
CADJ = 10µF • 66
0.3
1.0
0.002 0.02
60
77
Adjust Pin Current
•
65
100
10mA ≤ IOUT ≤ IMAX
•
0.5
5
Adjust Pin Current Change
3V ≤ (VIN-VOUT) ≤ 40V
•
2
5
3V ≤ (VIN-VOUT) ≤ 50V (HV Series) •
3
6
Minimum Load Current
(VIN - VOUT) ≤ 40V
•
(VIN - VOUT) ≤ 10V
•
2.5
5
1.2
3
(VIN - VOUT) ≤ 15V
• 1.5
2.2
3.2
Current Limit
(VIN - VOUT) = 40V
• 0.24 0.4
(VIN - VOUT) = 50V (HV Series) • 0.2
0.4
0.8
Temperature Stability
•
0.6
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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