Datasheet > LM2925T

LM2925T

更新时间： 2024-01-01 15:55:41

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
8页	226K
描述
Low Dropout Regulator with Delayed Reset

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LM2925T 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	, SIP5,.1,67TB	Reach Compliance Code：	unknown
风险等级：	5.92	可调性：	FIXED
标称回动电压 1：	0.8 V	最大绝对输入电压：	26 V
JESD-609代码：	e0	最大电网调整率：	0.05%
最大负载调整率：	0.05%	输出次数：	1
端子数量：	5	工作温度TJ-Max：	150 °C
工作温度TJ-Min：	-40 °C	最大输出电流 1：	0.5 A
标称输出电压 1：	5 V	封装主体材料：	PLASTIC/EPOXY
封装等效代码：	SIP5,.1,67TB	认证状态：	Not Qualified
子类别：	Other Regulators	表面贴装：	NO
技术：	BIPOLAR	端子面层：	Tin/Lead (Sn/Pb)
端子节距：	1.7 mm	端子位置：	SINGLE
最大电压容差：	5%

LM2925T 数据手册

April 1998

LM2925

Low Dropout Regulator with Delayed Reset

LM2925 cannot be harmed by temporary mirror-image inser-

tion. Familiar regulator features such as short circuit and

thermal overload protection are also provided.

General Description

The LM2925 features a low dropout, high current regulator.

Also included on-chip is a reset function with an externally

set delay time. Upon power up, or after the detection of any

error in the regulated output, the reset pin remains in the ac-

tive low state for the duration of the delay. Types of errors de-

tected include any that cause the output to become unregu-

lated: low input voltage, thermal shutdown, short circuit,

input transients, etc. No external pull-up resistor is neces-

sary. The current charging the delay capacitor is very low, al-

lowing long delay times.

Features

n 5V, 750 mA output

n Externally set delay for reset

n Input-output differential less than 0.6V at 0.5A

n Reverse battery protection

n 60V load dump protection

n −50V reverse transient protection

n Short circuit protection

n Internal thermal overload protection

n Available in plastic TO-220

n Long delay times available

n P⁺Product Enhancement tested

Designed primarily for automotive applications, the LM2925

and all regulated circuitry are protected from reverse battery

installations or two-battery jumps. During line transients,

such as a load dump (60V) when the input voltage to the

regulator can momentarily exceed the specified maximum

operating voltage, the 0.75A regulator will automatically shut

down to protect both internal circuits and the load. The

Typical Application Circuit

Connection Diagram

TO-220 5-Lead

DS005268-2

Order Number LM2925T

See NS Package Number T05A

DS005268-1

Required if regulator is located far from power supply filter.

must be at least 10 µF to maintain stability. May be increased

OUT

without bound to maintain regulation during transients. Locate as close as

possible to 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.

FIGURE 1. Test and Application Circuit

DS005268

www.national.com

12 3 4 5 6 7 8

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