LM2984

更新时间： 2024-11-22 22:51:43

品牌	Logo	应用领域
美国国家半导体 - NSC		微处理器
页数	文件大小	规格书
16页	402K
描述
Microprocessor Power Supply System

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LM2984 数据手册

April 1998

LM2984

Microprocessor Power Supply System

General Description

Features

n Three low dropout tracking regulators

n Output current in excess of 500 mA

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

n Low quiescent current standby regulator

n Microprocessor malfunction RESET flag

n Delayed RESET on power-up

n Accurate pretrimmed 5V outputs

n Reverse battery protection

The LM2984 positive voltage regulator features three inde-

pendent and tracking outputs capable of delivering the

power for logic circuits, peripheral sensors and standby

memory in a typical microprocessor system. The LM2984 in-

cludes circuitry which monitors both its own high-current out-

put and also an external µP. If any error conditions are

sensed in either, a reset error flag is set and maintained until

the malfunction terminates. Since these functions are in-

cluded in the same package with the three regulators, a

great saving in board space can be realized in the typical mi-

croprocessor system. The LM2984 also features very low

dropout voltages on each of its three regulator outputs (0.6V

at the rated output current). Furthermore, the quiescent cur-

rent can be reduced to 1 mA in the standby mode.

n Overvoltage protection

n Reverse transient protection

n Short circuit protection

n Internal thermal overload protection

n ON/OFF switch for high current outputs

n P⁺Product Enhancement tested

Designed also for vehicular applications, the LM2984 and all

regulated circuitry are protected from reverse battery instal-

lations or 2-battery jumps. Familiar regulator features such

as short circuit and thermal overload protection are also pro-

vided. Fixed outputs of 5V are available in the plastic TO-220

power package.

Typical Application Circuit

DS011252-1

must be at least 10 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to

OUT

the regulator. This capacitor must be rated over the same operating temperature range as the regulator. The equivalent series resistance (ESR) of this

capacitor is critical; see curve.

Order Number LM2984T

See NS Package Number TA11B

DS011252

www.national.com

12 3 4 5 6 7...16

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与LM2984相关器件

型号	品牌	获取价格	描述	数据表
LM2984C	NSC	获取价格	LM2984C Microprocessor Power Supply System
LM2984CT	NSC	获取价格	LM2984C Microprocessor Power Supply System
LM2984CT/NOPB	TI	获取价格	3 channel, 5V linear regulator for microprocessor power supplies 11-TO-220 -40 to 125
LM2984T	NSC	获取价格	Microprocessor Power Supply System
LM2984T/NOPB	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PZFM11
LM299	NSC	获取价格	Precision Reference
LM2990	NSC	获取价格	Negative Low Dropout Regulator
LM2990	TI	获取价格	LM2990 Negative Low Dropout Regulator
LM2990-5.0MD8	TI	获取价格	LM2990QML Negative Low Dropout Regulator
LM2990-5.0MW8	TI	获取价格	LM2990QML Negative Low Dropout Regulator

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