LP6250 datasheet(1/8 Pages) POWER

номер детали	LP6250

подробное описание детали	2.1A Synchronous Current Boost DC/DC Regulator

PDF	8 Pages

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производитель	POWER [Lowpower Semiconductor inc]

домашняя страница	http://www.lowpowersemi.com

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Preliminary Datasheet

LP6250

LP6250 –00 Version 1.0 Datasheet

Sep.-2010

www.lowpowersemi.com

Page 1 of 8

2.1A Synchronous Current Boost DC/DC Regulator

General Description

The LP6250 is high efficiency Synchronous Boost

DC/DC Converter, fixed frequency, current-mode

step-up converter with output to input disconnect. A

PWM step-up DC/DC converters optimized to

provide a high efficiency solution to medium power

system.

Its

PWM

circuitry

with

built-in

2.1A@250mΩ power mosfet makes this converter

highly power efficiently. Selectable high switching

frequency allows faster loop response and easy

filtering with a low noise output. The non-inverting

input its error amplifier is connected to an internal

0.5V precision reference voltage. Soft-start time can

be programmed with an external capacitor, which

sets the input current ramp rate. Current mode

control and external compensation network make it

easy and flexible to stabilize the system. the devices

regulates the output voltage up to 5V from either a

2cell NiMH/NiCd or a single-cell Li-ion Battery

with a 500KHz fixed frequency switching. These

features minimize overall solution footprint by

allowing the use of tiny, low profile inductors and

ceramic capacitors.

Ordering Information

LP6250 - □ □

□

F: Pb-Free

Package Type

QV: TDFN-10

Marking Information

Please see website.

Features

Up to 94% efficiency

Shut-down current:<1uA

Output voltage Up to 5V

500KHz fixed frequency switching

High switch on current:2.1A@250mΩ

Available in TDFN-10 Package 　

Applications

Battery products

Host Products

Motor Power Devices

Typical Application Circuit

LP6250QVF

6

9

3

10

1

4

2

5

7

BATT

SW

FB

GND

EN

LBO

OUT

GND

LBI

R2

10K

C3

22pF

5V

R3

100K

R5

ON/OFF

R1

90K

C1

22uF

R5

6.8uH

C2

47uF

R4

Vin

LBO

Pin Configurations

3

4

OUT

FB

2

7

5

LBO

NC

GND

LBI

BATT

10

9

EN

GND

6

1

SW

8

11

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Lowpower Semiconductor ...	LP6252	460Kb / 8P	Output to Input Disconnect at Shutdown Mode
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производитель	номер детали	датащи	подробное описание детали
Kingbor Technology Co	KB3429	154Kb / 5P	Synchronous Boost DC//DC Regullator
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