LP78083 datasheet(1/8 Pages) POWER

部件名	LP78083

功能描述	650mA High Efficiency Synchronous Buck with Dual Channel LDO

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制造商	POWER [Lowpower Semiconductor inc]

网页	http://www.lowpowersemi.com

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Preliminary Datasheet

LP78083

LP78083 – Ver. 1.0 Datasheet

Feb.-2008

Page 1 of 8

650mA High Efficiency Synchronous Buck

with Dual Channel

LDO

General Description

The LP78083 are PMU, and contain a 650mA Buck

DC/DC and dual channel 350mA Linear Regulator,

Buck DC/DC is a constant frequency, current mode,

PWM step-down converter. The device integrates a

main switch and a synchronous rectifier for high

efficiency. The 2.1V to 6.5V input voltage range makes

the LP78083 is ideally suited for portable electronic

devices that are powered from 1-cell Li-ion battery or

from other power sources within the range such as

cellular phones, PDAs and handy-terminals. Internal

synchronous rectifier with low RDS(ON) dramatically

reduces conduction loss at PWM mode. The internal

synchronous switch increases efficiency while

eliminate the need for an external Schottky diode.The

switching ripple is easily smoothed-out by small

package filtering elements due to a fixed operation

frequency of 1.5MHz. This along with small 2*2 DFN-8

package provide small PCB area application. Other

features include soft start, lower internal reference

voltage with 2% accuracy, over temperature protection,

and over current protection。

Ordering Information

LP78083 -□ □/ □ □ □ □ □

F: Pb-Free

Package Type

QV: SOT23-6

Out3 Voltage Type

30: 3.0V

33: 3.3V

Out2 Voltage Type

30: 3.0V

33: 3.3V

Features

650mA Buck High Efficiency: 96% 

1.5MHz Fixed-Frequency PWM Operation

Adjustable Output From 0.6V to VIN 　

350mA LDO: 3.0V and 3.3V Fixed output

100% Duty Cycle Low Dropout Operation

Available in 2*2 TDFN-8 Package 　

Low than 1µA Shutdown Current

Applications

Portable Media Players/MP3 players

Cellular and Smart mobile phone

PDA

DSC

Wireless Card

Pin Configurations

PIN NO

Function

1

SW

2

GND

3

OUT2

4

VIN

5

OUT3

6

EN

7

VDD

8

FB1

Marking Information

Please see website.

类似零件编号 - LP78083

制造商	部件名	数据表	功能描述
Lowpower Semiconductor ...	LP78081	385Kb / 8P	600mA High Efficiency Synchronous Buck with 350mA LDO
	LP78081-30B6F	385Kb / 8P	600mA High Efficiency Synchronous Buck with 350mA LDO
	LP78081-33B6F	385Kb / 8P	600mA High Efficiency Synchronous Buck with 350mA LDO
	LP78084	1Mb / 20P	Total Power solution of Portable Applications 800mA Charge 800mA Buck DC/DC300mA LDO
	LP78084-18QVF	1Mb / 20P	Total Power solution of Portable Applications 800mA Charge 800mA Buck DC/DC300mA LDO

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类似说明 - LP78083

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