LDS3985M18R datasheet(1/20 Pages) STMICROELECTRONICS

部件名	LDS3985M18R

功能描述	Ultra low drop-low noise BiCMOS 300 mA voltage regulator for use with very low ESR output capacitor

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 20 page

July 2010

Doc ID 11039 Rev 7

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20

LDS3985xx

Ultra low drop-low noise BiCMOS 300 mA voltage

regulator for use with very low ESR output capacitor

Features

■ Input voltage from 2.5 V to 6 V

■ Stable with low ESR ceramic capacitors

■ Ultra low dropout voltage (150 mV typ. at 300

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

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

load, 200 µA typ. at 300 mA load; max 1.5 µA

in off mode)

■ Guaranteed output current up to 300 mA

■ Wide range of output voltage:

– from 1.25 V to 5.0 V

■ Fast turn-on time: typ. 240 µs

–[CO = 2.2 µF, CBYP = 33 nF and IO = 1 mA]

■ Logic-controlled electronic shutdown

■ Internal current and thermal limit

■ Output low noise voltage 30 µVRMS over 10 Hz

to 100 kHz

■ SVR of 55 dB at 1 kHz, 50 dB at 10 kHz

■ Temperature range: - 40 °C to 125 °C

Description

The LDS3985xx provides up to 300 mA, from 2.5

V to 6 V input voltage. It is stable with ceramic and

high quality tantalum capacitor. The ultra low drop

voltage, low quiescent current and low noise

makes it suitable for low power applications and in

battery powered systems. Regulator ground

current increases only slightly in dropout, further

prolonging the battery life. 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. Typical applications are

in mobile phone and similar battery powered

wireless systems, portable information

appliances.

DFN6

SOT23-5L

Table 1.

Device summary

Part numbers

Output voltages

LDS3985XX15

1.5 V

LDS3985XX18

1.8 V

LDS3985XX25

2.5 V

LDS3985XX28

2.8 V

LDS3985XX30

3.0 V

LDS3985XX33

3.3 V

LDS3985XX50

5.0 V

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类似零件编号 - LDS3985M18R

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STMicroelectronics	LDS3985M18R	337Kb / 13P	ULTRA LOW DROP-LOW NOISE BICMOS 300mA V.REG. FOR USE WITH VERY LOW ESR OUTPUT CAPACITOR Dec-2004

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