Preliminary Datasheet

LP6342

LP6342-03

Version 1.3 Datasheet

Oct.-2011

www.lowpowersemi.com

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1.5MHz,

2A Step-down Converter

General Description

The LP6342 is a 1.5MHz constant frequency current

mode PWM step-down converter. It is ideal for portable

equipment requiring very high current up to 2A from

single-cell Lithium-ion batteries while still achieving

over 90% efficiency during peak load conditions. The

LP6342 also can run at 100% duty cycle for low dropout

operation, extending battery life in portable systems

while light load operation provides very low output

ripple for noise sensitive applications.

The LP6342 can supply up to 2A output load current

from a 2.5V to 5.5V input voltage and the output voltage

can be regulated as low as 0.6V. The high switching

frequency minimizes the size of external components

while keeping switching losses low. The internal slope

compensation setting allows the device to operate with

smaller inductor values to optimize size and provide

efficient operation.

The LP6342 is available with adjustable (0.6V to VIN)

output voltage. The device is available in a Pb-free, 3mm

and is rated over the-40°C to +85°C temperature range.

Order Information

LP6342

□ □ □

F: Pb-Free

Package Type

QV: TDFN-10

MS: MSOP-10

SP:SOP8(EP)

Features

Input Voltage Range: 2.5V to 5.5V

Output Voltage Range: 0.6V to VIN

2A Output Current

High Efficiency :Up to 95%

100% Duty Cycle in Dropout

Low Shutdown Current: < 1 u A

1.5MHz Switching Frequency

Soft star Function

Short Circuit Protection

Thermal Fault Protection

3 m m × 3 m m TDFN-10 or MSOP-10,SOP8(EP)

Package

RoHS Compliant and 100% Lead (Pb)-Free

Applications

Portable Instruments

DSP Core Supplies

Cellular Phone and Smart mobile phone

PDA

GPS Applications

Marking Information

Please see website:www.lowpowersemi.com.

Typical Application Circuit

2.2uH

L1

Vout=(R1/R2+1)*VFB

VIN

R2

R1

EN

1

SW

7

FB

5

Vin

2

Vin

3

SW

8

LP6342

Vout_2A

C1

10uF

C2

22uF