LM337 STMicroelectronics, LM337 Datasheet

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LM337

Manufacturer Part Number
LM337
Description
LM337THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATORS
Manufacturer
STMicroelectronics
Datasheet

Specifications of LM337

Ripple Rejection
77 dB
Excellent Thermal Regulation
0.002%/V

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DESCRIPTION
The LM137 series are adjustable 3-terminal nega-
tive voltage regulators capable of supplying in ex-
cess - 1.5A over a -1.2 to - 37V output voltage range.
They are exceptionally easy to use and require only
two external resistors to set the output voltage. Fur-
ther, both line and load regulation are better than
standard fixed regulators. Also, LM137 regulators
are supplied in standard transistor packages which
are easily mounted and handled. In addition to
higher performance than fixed regulators, the
LM137 series offer full overload protection available
only in integrated circuits. Included on the chip are
current limit, thermal overload protection and safe
area protection. All overload protection circuitry re-
mains fully functional even if the adjustment terminal
is disconnected.
PIN CONNECTIONS
March 1993
OUTPUT VOLTAGE ADJUSTABLE DOWN TO
V
1.5A GUARANTEED OUTPUT CURRENT
0.3%/V TYPICAL LOAD REGULATION
0.01%/V TYPICAL LINE REGULATION
CURRENT LIMIT CONSTANT WITH TEM-
PERATURE
RIPPLE REJECTION : 77dB
STANDARD 3-LEAD TRANSISTOR PACK-
AGES
EXCELLENT
0.002%/V
50ppm/ C TEMPERATURE COEFFICIENT
ref
1 - Output
2 - Adj
Case is input
THERMAL
(bottom view)
TO-3
REGULATION:
NEGATIVE VOLTAGE REGULATORS
(bottom view)
1 - Adj
2 - Output
3 - input
THREE-TERMINAL ADJUSTABLE
TO-39
Heatsink surface connected to input
LM137/LM237
(front view)
TO-220
TO-220
TO-39
TO-3
1 - Adj
2 - Output
3 - Input
LM337
1/14

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LM337 Summary of contents

Page 1

... PIN CONNECTIONS TO-3 (bottom view Output 2 - Adj Case is input March 1993 THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATORS REGULATION: TO-39 (bottom view Adj 2 - Output 3 - input Heatsink surface connected to input LM137/LM237 LM337 TO-3 TO-220 TO-39 TO-220 (front view Adj 2 - Output 3 - Input 1/14 ...

Page 2

... LM337 0 to 125 2/14 Parameter TO-220/TO-3 TO-39 LM137 LM237 LM337 Parameter TO-3 TO-220 TO-39 TO-3 TO-220 TO-39 PACKAGE TO LM137K o C LM237K LM237SP C LM337K LM337SP Value Unit 40 V 1.5 A 0.5 -55 to 150 C o -25 to 150 0 to 125 -65 to 150 C o Internally Limited W Typ. Max. Unit C/W ...

Page 3

... SCHEMATIC DIAGRAM LM137-LM237-LM337 3/14 ...

Page 4

... LM137-LM237-LM337 ELECTRICAL CHARACTERISICS o o LM137: -55 C < Tj < 150 LM237: -25 C < Tj < 150 LM337 < Tj < 150 5V 0.5 A (unless otherwise specified Symbol Parameter V Reference Voltage ref amb min j max 40V, 10mA max ...

Page 5

... LM137-LM237-LM337 5/14 ...

Page 6

... LM137-LM237-LM337 6/14 ...

Page 7

... L Vertical sensitivity 5mV/div. LM137-LM237-LM337 The LM137 specification is 0.02 %/W max.In figure 1, a typical LM337’s output drifts only 3mV for 0.03 – 10V) when a 10W pulse is applied for O 10ms. This performance is thus well inside the spe- cification limit of 0.02%/W x 10W = 0.2% max. When the 10W pulse is ended the thermal regulation again shows a 3mV step as the LM137 chip cools off ...

Page 8

... LM137-LM237-LM337 TYPICAL APPLICATIONS ADJUSTABLE NEGATIVE VOLTAGE REGULATOR * solid tantalum aluminium electrolytic required for stability solid tantalum is required only if regulator is more than 10cm from power supply filter capacitor. ADJUSTABLE LAB VOLTAGE REGULATOR * The 10 F capaci t ors are optimal to improve ripple rejection. ...

Page 9

... CURRENT REGULATOR NEGATIVE REGULATOR WITH PROTECTION DIODES * When C is larger than protects the LM137 in case the input supply is shorted When C2 is larger than 10 F and larger than – 25V, D2 protects the LM137 in case the output is shorted. LM137-LM237-LM337 9/14 ...

Page 10

... LM137-LM237-LM337 * – 5.2V REGULATOR WITH ELECTRONIC SHUTDOWN * Minimum output – 1.3V when control input is low. ADJUSTABLE CURRENT REGULATOR 10/14 ...

Page 11

... TO-3 MECHANICAL DATA mm DIM. MIN. TYP. A 11.00 B 0.97 C 1.50 D 8.32 E 19.00 G 10.70 N 16.50 P 25.00 R 4.00 U 38.50 V 30.00 MAX. MIN. 13.10 0.433 1.15 0.038 1.65 0.059 8.92 0.327 20.00 0.748 11.10 0.421 17.20 0.649 26.00 0.984 4.09 0.157 39.30 1.515 30.30 1.187 LM137-LM237-LM337 inch TYP. MAX. 0.516 0.045 0.065 0.351 0.787 0.437 0.677 1.023 0.161 1.547 1.193 D C P003F 11/14 ...

Page 12

... LM137-LM237-LM337 TO-220 MECHANICAL DATA DIM. MIN. A 4.40 C 1. 0.49 F 0.61 F1 1.14 F2 1.14 G 4.95 G1 2 13.0 L5 2.65 L6 15.2 L7 6.2 L9 3.5 DIA. 3.75 L5 12/14 mm TYP. MAX. MIN. 4.60 0.173 1.32 0.048 2.72 0.094 1.27 0.70 0.019 0.88 0.024 1.70 0.044 1.70 0.044 5.15 0.194 2.7 0.094 10.40 0.393 16.4 14.0 0.511 2.95 0.104 15.9 0.598 6.6 0.244 4.2 0.137 3.85 0.147 L2 Dia inch TYP. MAX. ...

Page 13

... TO39 MECHANICAL DATA mm DIM. MIN. TYP MAX. MIN. 0.500 0.49 6.6 8.5 9.4 0.200 1.2 0 (typ LM137-LM237-LM337 inch TYP. MAX. 0.019 0.260 0.334 0.370 0.047 0.035 P008B 13/14 ...

Page 14

... LM137-LM237-LM337 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice ...

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