LM9070SX/NOPB集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LM9070SX/NOPB属于集成电路（IC）的线性+开关稳压器。由美国德州仪器公司制造生产的LM9070SX/NOPB稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

1FEATURES

2• Automotive Application Reliability

• 3% Output Voltage Tolerance

• Insensitive to Radiated RFI

• Dropout Voltage Less than 800 mV with 250

mA Output Current

• Externally Programmed Reset Delay Interval

• Keep-Alive Feature with 2 Logic Control Inputs

• 60V Load Dump Transient Protection

• Thermal Shutdown

• Short Circuit Protection and Disable Safety

特性 Features

• Reverse Battery Protection

• Low OFF Quiescent Current, 50 μA Maximum

• Wide Operating Temperature Range −40°C to

+125°C

• TO-263 and 20-Pin Power Surface Mount

Packages

• Lead Form Compatible with TLE4267 TO-220

Regulator

DESCRIPTION

The LM9070 is a 5V, 3% accurate, 250 mA low-

dropout voltage regulator. The regulator features an

active low delayed reset output flag which can be

used to reset a microprocessor system on turn-ON

and in the event that the regulator output falls out of

regulation for any reason. An external capacitor

programs a delay time interval before the reset output

can return high.

Designed for automotive application the LM9070

contains a variety of protection features such as

reverse battery, over-voltage shutdown, thermal

shutdown, input transient protection and a wide

operating temperature range.

A unique two-input logic control scheme is used to

enable or disable the regulator output. An ON/OFF

input can be provided by an ignition switch derived

signal while a second, Keep-Alive input, is generated

by a system controller. This allows for a system to

remain ON after ignition has been switched OFF. The

system controller can then execute a power-down

routine and after which command the regulator OFF

to a low quiescent current state (60 μA max).

Design techniques have been employed to allow the

regulator to remain operational and not generate false

reset signals when subjected to high levels of RF

energy (300V/m from 2 MHz to 400 MHz).