Datasheet > LM2937ET-3.3

LM2937ET-3.3

更新时间： 2024-11-17 22:22:43

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
10页	297K
描述
400mA and 500mA Voltage Regulators

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数据手册
替代型号

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LM2937ET-3.3 数据手册

February 1998

LM2937-2.5, LM2937-3.3

400mA and 500mA Voltage Regulators

two-battery jumps and up to +60V/−50V load dump tran-

sients. Familiar regulator features such as short circuit and

thermal shutdown protection are also built in.

General Description

The LM2937-2.5 and LM2937-3.3 are positive voltage regu-

lators capable of supplying up to 500 mA of load current.

Both regulators are ideal for converting a common 5V logic

supply, or higher input supply voltage, to the lower 2.5V and

3.3V supplies to power VLSI ASIC’s and microcontrollers.

Special circuitry has been incorporated to minimize the qui-

escent current to typically only 10 mA with a full 500 mA load

current when the input to output voltage differential is greater

than 5V.

Features

n Fully specified for operation over −40˚C to +125˚C

n Output current in excess of 500 mA (400mA for

SOT-223 package)

n Output trimmed for 5% tolerance under all operating

conditions

n Wide output capacitor ESR range, 0.01Ω up to 5Ω

n Internal short circuit and thermal overload protection

n Reverse battery protection

n 60V input transient protection

n Mirror image insertion protection

The LM2937 requires an output bypass capacitor for stabil-

ity. As with most regulators utilizing a PNP pass transistor,

the ESR of this capacitor remains a critical design param-

eter, but the LM2937-2.5 and LM2937-3.3 include special

compensation circuitry that relaxes ESR requirements. The

LM2937 is stable for all ESR ratings less than 5Ω. This al-

lows the use of low ESR chip capacitors.

The regulators are also suited for automotive applications,

with built in protection from reverse battery connections,

Connection Diagram and Ordering Information

TO-220 Plastic Package

SOT-223 Plastic Package

DS100113-24

DS100113-25

Front View

Order Number LM2937ET-2.5, LM2937ET-3.3,

Order Number LM2937IMP-2.5, LM2937IMP-3.3,

See NS Package Number MA04A

See NS Package Number T03B

TO-263 Surface-Mount Package

DS100113-27

Side View

DS100113-26

Top View

Order Number LM2937ES-2.5, LM2937ES-3.3,

See NS Package Number TS3B

DS100113

www.national.com

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LM2937ET-3.3 替代型号

型号	品牌	替代类型	描述	数据表
LM2940T-5.0/NOPB	TI	功能相似	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2940CT-5.0/NOPB	TI	功能相似	LM2940-N/LM2940C 1A Low Dropout Regulator
LM2937ET-3.3/NOPB	TI	功能相似	LM2937-2.5, LM2937-3.3 400mA and 500mA Voltage Regulators

与LM2937ET-3.3相关器件

型号	品牌	获取价格	描述	数据表
LM2937ET-3.3/NOPB	TI	获取价格	LM2937-2.5, LM2937-3.3 400mA and 500mA Voltage Regulators
LM2937ET-5.0	TI	获取价格	LM2937 500 mA Low Dropout Regulator
LM2937ET-5.0	NSC	获取价格	500 mA Low Dropout Regulator
LM2937ET-5.0/NOPB	TI	获取价格	LM2937 500 mA Low Dropout Regulator
LM2937ET-5.0/NOPB	NSC	获取价格	IC VREG 5 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, PSFM3, ROHS COMPLIANT, PLASTIC, TO-
LM2937ET-8.0	TI	获取价格	LM2937 500 mA Low Dropout Regulator
LM2937ET-8.0	NSC	获取价格	500 mA Low Dropout Regulator
LM2937ET-8.0/NOPB	TI	获取价格	LM2937 500 mA Low Dropout Regulator
LM2937G-10-AA3-R	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR
LM2937G-10-AA3-T	UTC	获取价格	500mA LOW DROPOUT VOLTAGE REGULATOR

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