Preliminary Datasheet

LP6341

LP6341 –05 Ver. 1.5 Datasheet

Feb.-2009

1.5MHz,

1.5A Step-down Converter With Soft-Start

General Description

The LP6341 contains a independent 1.5MHz constant

frequency, current mode, PWM step-down converters.

The

converter

integrates

a

main

switch

and

a

synchronous rectifier for high efficiency without an

external Schottky diode. The LP6341 is ideal for

powering portable equipment that runs from a single cell

Lithium-Ion (Li+) battery. The converter can supply

1500mA of load current from a 2.5V to 5.5V input

voltage. The output voltage can be regulated as low as

0.5/0.6V. The LP6341 can also run at 100% duty cycle

for low dropout applications.

The LP6341 is available in a 10-lead 3mm*3mm DFN-10

package and is rated over the -40°C to 85°C temperature

range.

Order Information

LP6341□ - □ □ □ □

□

F: Pb-Free

Package Type

QV: TDFN-10

Output Voltage Type

12: 1.2V

18: 1.8V

33: 3.3V

A:

Adjustable

Feedback Voltage

X:

0.6V

Default:

0.5V

Typical Application Circuit

Features

Input Voltage Range: 2.5V to 5.5V

Output Voltage Range: 0.6V to VI N

1500mA Load Current on Channel

Up to 95% Efficiency

100% Duty Cycle in Dropout

< 1 u A Quiescent Current

1.5MHz Switching Frequency

Soft star Function

Short Circuit Protection

Current Mode Operation

Thermal Fault Protection

3m m × 3mm TDFN-10 Package

RoHS Compliant and 100% Lead (Pb)-Free

Applications

Portable Media Players

Cellular and Smart mobile phone

PDA/DSC

GPS Applications

Marking Information

Please see website.

VIN

22pF

R1

LP6341XAQVF

1

7

5

2

3

8

EN

SW

FB

Vin

Vin

SW

Vout_1.5A

2.2uH

22uF

R2

Vout=(R1/R2+1)*VFB

10uF