Texas Instruments LM337KTER, LM337KC, LM237KC, LM237KTER, LM337Y Datasheet
LM237, LM337
CHIP
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047C – NOVEMBER 1981 – REVISED JULY 1999
D
Output V oltage Range Adjustable From
–1.2 V to –37 V
D
Output Current Capability of 1.5 A Max
D
Input Regulation Typically 0.01% Per
Input-Voltage Change
D
Output Regulation Typically 0.3%
D
Peak Output Current Constant Over
Temperature Range of Regulator
D
Ripple Rejection Typically 77 dB
D
Direct Replacement for National
Semiconductor LM237 and LM337
description
The LM237 and LM337 are adjustable 3-terminal
negative-voltage regulators capable of supplying
in excess of –1.5 A over an output voltage range
of –1.2 V to –37 V . They are exceptionally easy to
use, requiring only two external resistors to set the
output voltage and one output capacitor for
frequency compensation. The current design has
been optimized for excellent regulation and low
thermal transients. In addition, the LM237 and
LM337 feature internal current limiting, thermal
shutdown, and safe-area compensation, making
them virtually immune to failure by overloads.
The LM237 and LM337 serve a wide variety of
applications, including local on-card regulation,
programmable output-voltage regulation, and
precision current regulation.
KC PACKAGE
(TOP VIEW)
OUTPUT
INPUT
ADJUSTMENT
The INPUT terminal is in electrical
contact with the mounting base.
TO-220AB
O
I
A
KTE PACKAGE
(TOP VIEW)
OUTPUT
INPUT
ADJUSTMENT
The INPUT terminal is in electrical contact with the mounting base.
O
I
A
The LM237 is characterized for operation over the
virtual junction temperature range of –25°C to
150°C. The LM337 is characterized for operation
over the virtual junction temperature range of 0°C
to 125°C.
T
J
–25°C to 150°C LM237KC LM237KTE —
0°C to 125°C LM337KC LM337KTE LM337Y
The KTE package is only available taped and reeled. Add the R suffix to the device type (e.g.,
LM237KTER). Chip forms are tested at 25°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
HEAT-SINK MOUNTED
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
AVAILABLE OPTIONS
PACKAGED DEVICES
(KC)
PLASTIC
FLANGE MOUNTED
(KTE)
FORM
(Y)
Copyright 1999, Texas Instruments Incorporated
1
LM237, LM337
Output current, I
mA
O erating virtual junction tem erature, T
J
°C
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047C – NOVEMBER 1981 – REVISED JULY 1999
schematic diagram
ADJUSTMENT
OUTPUT
INPUT
absolute maximum ratings over operating temperature ranges (unless otherwise noted)
†
Input-to-output differential voltage, VI – VO –40 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
(see Notes 1 and 2): KC package 22°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . .
JA
KTE package 23°C/W. . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Maximum power dissipation is a function of TJ(max),
ambient temperature is PD = (TJ(max) – TA)/
variations in individual device electrical characteristics and thermal resistance, the built-in thermal overload protection may be
activated at power levels slightly above or below the rated dissipation.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
θ
, and TA. The maximum allowable power dissipation at any allowable
θ
JA
JA
. Operating at the absolute maximum TJ of 150°C can impact reliability. Due to
recommended operating conditions
MIN MAX UNIT
p
p
O
p
|VI – VO| ≤ 40 V, P ≤ 15 W 10 1500
|VI – VO| ≤ 10 V, P ≤ 15 W 6 1500
LM237 –25 150
LM337 0 125
°
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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