Original Creation Date: 07/12/95
Last Update Date: 03/23/00
Last Major Revision Date: 04/21/99
MNLM137-K REV 0A0 MICROCIRCUIT DATA SHEET
3 TERMINAL ADJUSTABLE NEGATIVE REGULATOR
General Description
The LM137K is an adjustable 3-terminal negative voltage regulator capable of supplying in
excess of -1.5A over an output voltage range of -1.2V to -37V. This regulator is
exceptionally easy to apply, requiring only 2 external resistors to set the output voltage
and 1 output capacitor for frequency compensation. The circuit design has been optimized
for excellent regulation and low thermal transients. Futher, the LM137K features internal
current limiting, thermal shutdown and safe-area compensation, making them virtually
blowout-proof against overloads.
The LM137K serves a wide variety of applications including local on-card regulation,
programmable-output voltage regulation or procision current regulation. The LM137K is an
ideal complement to the LM117K adjustable positive regulator.
NS Part Numbers
LM137K/883
Industry Part Number
LM137
Prime Die
LM137
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description Temp ( C)
o
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
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MICROCIRCUIT DATA SHEET
MNLM137-K REV 0A0
Features
- Output voltage adjustable from -1.2V to -37V
- 1.5A output current guaranteed, -55 C to +150 C
- Line regulation typically 0.01%/V
- Load regulation typically 0.3%
- Excellent thermal regulation, 0.002%/W
- 50 ppm/ C temperature coefficient
- Temperature-independent current limit
- Internal thermal overload protection
- Stantard 3-lead transistor package
- Output short circuit protected
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MICROCIRCUIT DATA SHEET
MNLM137-K REV 0A0
(Absolute Maximum Ratings)
(Note 1)
Power Dissipation
(Note 2) Internally Limited
Input-Output Voltage Differential 40V
Operating Junction Temperature -55 C to +150 C
Maximum Junction Temperature
(Note 2) 150 C
Storage Temperature -65 C to + 150 C
Lead Temperature 300 C(Soldering, 10 seconds)
Thermal Resistance
ThetaJA 40 C/W(Still Air) 14 C/W(500LF/Min Air Flow)
3 C/WThetaJC
Package Weight 12750mg(Typical)
ESD Rating
(Note 3) 2K Volts
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Operating Ratings indicate conditions for which the device is functional, but do not
guarantee specific performance limits. For guaranteed specifications and test
conditions, see the Electrical Characteristics. The guaranteed specifications apply
only for the test conditions listed. Some performance characteristics may degrade
when the device is not operated under the listed test conditions.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is
dictated by Tjmax (maximum junction temperature), ThetaJA (package junction to
ambient thermal resistance), and TA (ambient temperature). The maximum allowable
power dissipation at any temperature is Pdmax = (Tjmax - TA) /ThetaJA or the number
given in the Absolute Maximum Ratings, whichever is lower.
Note 3: Human body model, 100pF discharged through 1.5K Ohms
Recommended Operating Conditions
Ta -55 C to +125 C
Input Voltage Range -41.25V to -4.25V
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MNLM137-K REV 0A0 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vin=-4.25V, Il=8mA, Vout=Vref
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Vref Reference Voltage -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
Vin = -42V -1.275 -1.225 V 1
Vin = -41.3V -1.3 -1.2 V 2, 3
Iq Minimum Load
Current Vout = -1.7V 3 mA 1, 2,
3
Vout = -1.7V, Vin = -11.75V 3 mA 1, 2,
3
Vout = -1.7V, Vin = -42V 5 mA 1
Vout = -1.7V, Vin = -41.3V 5 mA 2, 3
Rline Line Regulation -42V < Vin < -4.25V -9 9 mV 1
-41.3V < Vin < -4.25V -23 23 mV 2, 3
Rload Load Regulation Vin=-6.25V, 8mA < Il < 1.5A -25 25 mV 1, 2,
3
Vin = -14.5V, 8mA < Il < 1.5A -25 25 mV 1
Vin=-40V, 8mA < Il < 300 mA -25 25 mV 1
Vin=-40V, 8mA < Il < 250 mA -25 25 mV 2, 3
Iadj Adjustment Pin
Current 100 uA 1, 2,
3
Vin = -42V 100 uA 1
Vin = -41.3V 100 uA 2, 3
Delta Iadj
/(line) Change vs Line
Voltage -42V < Vin < -4.25V -5 5 uA 1
-41.3V < Vin < -4.25V -5 5 uA 2, 3
Delta
Iadj/
(load)
Change vs Load
Current 8 mA < Il < 1.5A, Vin=-6.25V -5 5 uA 1, 2,
3
Vrth Thermal
Regulation
Thermal Recovery
Vin = -14.5V, Il=1.5mA, t=10mS -5 5 mV 1
Vin = -14.5V, Il=8mA, t=10mS -5 5 mV 1
Theta JC Thermal
Resistance 1 3 Deg
C/W
1
Icl Current Limit Vin = -5V -3.5 -1.5 A 1, 2,
3
Vin = -40V -1.2 -0.24 A 1, 2,
3
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MNLM137-K REV 0A0 MICROCIRCUIT DATA SHEET
Electrical Characteristics
AC PARAMETERS
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Rr Ripple Rejection
Ratio Vin= -6.25V, Vout=Vref, f=120Hz,
Il=0.5A, ei=1Vrms 2, 3 66 dB 4, 5,
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DC PARAMETERS: DRIFT VALUES
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vin = -4.25V, Il = 8mA, Vout=Vref. "Deltas not required on B-Level product. Deltas required for
S-Level product ONLY as specified on Internal Processing Instructions (IPI)."
Vref Reference Voltage -0.01 0.01 V 1
Rline Line Regulation -42V < Vin < -4.25V -4 4 mV 1
Iadj Adjustment Pin
Current -10 10 uA 1
Note 1: Guaranteed parameter, not tested.
Note 2: Bench test refer to (SG) RPI-3-362.
Note 3: Test at +25 C, guaranteed but not tested at +125 C and -55 C.
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MICROCIRCUIT DATA SHEET
MNLM137-K REV 0A0
Graphics and Diagrams
GRAPHICS# DESCRIPTION
05191HRB4 METAL CAN (KA), TO-3, 2LD, LOW PROFILE (B/I CKT)
K02CRE METAL CAN (KA), TO-3, 2LD, LOW PROFILE (P/P DWG)
P000200A METAL CAN (KA), TO-3, 2 LD, LOW PROFILE (PINOUT)
See attached graphics following this page.
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N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
VOUT
ADJUSTMENT
BOTTOM VIEW
LM137K, LM137HVK
2 - LEAD TO3
CONNECTION DIAGRAM
P000200A
CASE IS INPUT
MICROCIRCUIT DATA SHEET
MNLM137-K REV 0A0
Revision History
Rev ECN # Rel Date Originator Changes
0A0 M0003392 03/23/00 Rose Malone Update MDS from MNLM137-K, Rev. 0BL to Fully Released
MDS MNLM137-K, Rev. 0A0.
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