Datasheet > LD3985XX

LD3985XX

更新时间： 2024-11-15 03:50:47

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器信息通信管理
页数	文件大小	规格书
22页	553K
描述
Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible

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中文翻译

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LD3985XX 数据手册

LD3985xx

Ultra low drop-low noise BiCMOS voltage

regulators low ESR capacitors compatible

Features

■ Input voltage from 2.5 V to 6 V

■ Stable with low ESR ceramic capacitors

■ Ultra low dropout voltage (100 mV typ. at 150

mA load, 0.4 mV typ. at 1 mA load)

■ Very low quiescent current (85 µA typ. at no

load, 170 µA typ. at 150 mA load; max 1.5 µA

in OFF mode)

Flip-chip

(1.57x1.22)

SOT23-5L

TSOT23-5L

■ Guaranteed output current up to 150 mA

■ Wide range of output voltage: 1.22 V; 1.8 V;

2.5 V; 2.6 V; 2.7 V; 2.8 V; 2.9 V; 3 V; 3.3 V;

4.7 V

The ultra low drop-voltage, low quiescent current

and low noise make it suitable for low power

applications and in battery powered systems.

Regulator ground current increases only slightly

in dropout, further prolonging the battery life.

Power supply rejection is better than 60 dB at low

frequencies and starts to roll off at 10 kHz. High

power supply rejection is maintained down to low

input voltage levels common to battery operated

circuits. Shutdown logic control function is

available, this means that when the device is used

as local regulator, it is possible to put a part of the

board in standby, decreasing the total power

consumption. The LD3985xx is designed to work

with low ESR ceramic capacitors. Typical

■ Fast turn-on time: typ. 200 µs

[C = 1 µF, C

= 10 nF and I = 1 mA]

BYP

■ Logic-controlled electronic shutdown

■ Internal current and thermal limit

■ Output low noise voltage 30 µV

over 10 Hz

RMS

to 100 kHz

■ S.V.R. of 60 dB at 1 kHz, 50 dB at 10 kHz

■ Temperature range: -40 °C to 125 °C

Description

applications are in mobile phone and similar

battery powered wireless systems.

The LD3985xx provides up to 150 mA, from 2.5 V

to 6 V input voltage.

Table 1.

Device summary

Part number

LD3985XX122

LD3985XX18

LD3985XX25

LD3985XX26

LD3985XX27

LD3985XX28

LD3985XX29

LD3985XX30

LD3985XX33

LD3985XX47

December 2007

Rev 12

1/22

www.st.com

12 3 4 5 6 7...22

中文翻译

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与LD3985XX相关器件

型号	品牌	获取价格	描述	数据表
LD3985XX12	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX122	STMICROELECTRONICS	获取价格	Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible
LD3985XX13	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX15	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX18	STMICROELECTRONICS	获取价格	Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible
LD3985XX20	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX21	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX22	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX24	ETC	获取价格	ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
LD3985XX25	STMICROELECTRONICS	获取价格	Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible

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