LD39050 datasheet(1/28 Pages) STMICROELECTRONICS

部件名	LD39050

功能描述	500 mA low quiescent current and low noise voltage regulator

PDF	28 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 28 page

This is information on a product in full production.

October 2015

DocID15470 Rev 3

1/28

LD39050

500 mA low quiescent current and low noise voltage regulator

Datasheet

- production data

Features

• Input voltage from 1.5 to 5.5 V

• Ultra low-dropout voltage (200 mV typ. at 500

mA load)

• Very low quiescent current (20 µA typ. at no

load, 100 µA typ. at 500 mA load, 1 µA max. in

OFF mode)

• Very low noise without bypass capacitor

• Output voltage tolerance: ± 2.0% @ 25 °C

• 500 mA guaranteed output current

• Wide range of output voltages available on

request: 0.8 V to 4.5 V with 100 mV step and

adjustable from 0.8 V

• Logic-controlled electronic shutdown

• Compatible with ceramic capacitor COUT = 1 µF

• Internal current and thermal limit

• Package DFN6 (3x3 mm) and DFN6 (2x2 mm)

• Temperature range: from -40 °C to 125 °C

Description

The LD39050 provides 500 mA maximum current

with an input voltage range from 1.5 V to 5.5 V

and a typical dropout voltage of 200 mV. Stability

is given by ceramic capacitors. The ultra low drop

voltage, low quiescent current and low noise

features make it suitable for low power battery-

powered applications. Power supply rejection is

65 dB at low frequencies and starts to roll off at 10

kHz. The enable logic control function puts the

LD39050 in shutdown mode allowing a total

current consumption lower than 1 µA. The device

also includes short-circuit constant current limiting

and thermal protection. Typical applications are

mobile phones, hard disks and battery-powered

systems.

www.st.com

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