LDS3985 Datasheet

IC型號：
LDS3985
PDF描述：
STMicroelectronics [ULTRA LOW DROP-LOW NOISE BICMOS 300mA V...
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337.84KB
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STMICROELECTRONICS

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LDS3985

SERIES

ULTRA LOW DROP-LOW NOISE BICMOS 300mA V.REG.

FOR USE WITH VERY LOW ESR OUTPUT CAPACITOR

INPUT VOLTAGE FROM 2.5V TO 6V

STABLE WITH LOW ESR CERAMIC

CAPACITORS

ULTRA LOW DROPOUT VOLTAGE (150mV

TYP. AT 300mA LOAD, 0.4mV TYP. AT 1mA

LOAD)

VERY LOW QUIESCENT CURRENT (85碌A(chǔ)

TYP. AT NO LOAD, 200碌A(chǔ) TYP. AT 300mA

LOAD; MAX 1.5碌A(chǔ) IN OFF MODE)

GUARANTEED OUTPUT CURRENT UP TO

300mA

WIDE RANGE OF OUTPUT VOLTAGE:

1.25V; 1.35; 1.5V; 1.8V; 2V; 2.1V; 2.2V; 2.5V;

2.6V; 2.7V; 2.8V; 2.85V; 2.9V; 3V; 3.1V; 3.2V;

3.3V; 4.7V

FAST TURN-ON TIME: TYP. 240碌s

=2.2碌F, C

BYP

= 33nF AND I

=1mA]

LOGIC-CONTROLLED ELECTRONIC

SHUTDOWN

INTERNAL CURRENT AND THERMAL LIMIT

OUTPUT LOW NOISE VOLTAGE 30碌V

RMS

OVER 10Hz to 100KHz

S.V.R. OF 55dB AT 1KHz, 50dB AT 10KHz

TEMPERATURE RANGE: -40擄C TO 125擄C

DFN6

SOT23-5L

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.

DESCRIPTION

The LDS3985 provides up to 300mA, from 2.5V to

6V input voltage.

Figure 1: Schematic Diagram

December 2004

Rev. 1

1/13

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