LM337 데이터 시트보기 (PDF) - STMicroelectronics

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LM337

NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE

STMicroelectronics 

LM137/LM237

LM337

THREE-TERMINAL ADJUSTABLE

NEGATIVE VOLTAGE REGULATORS

. OUTPUT VOLTAGE ADJUSTABLE DOWN TO

Vref

. 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 THERMAL REGULATION:

0.002%/V

. 50ppm/°C TEMPERATURE COEFFICIENT

TO-3

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

TO-3

(bottom view)

TO-39

(bottom view)

TO-220

TO-39

TO-220

(front view)

March 1993

1 - Output

2 - Adj

Case is input

1 - Adj

2 - Output

3 - input

1 - Adj

2 - Output

3 - Input

Heatsink surface connected to input

1/14

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