LP3219-04

Apr.-2016

www.lowpowersemi.com

Page 1 of 12

Preliminary Datasheet

LP3219

1.5MHz, 2A Step-Down Converter

General Description

The LP3219 is a 1.5MHz constant frequency current

mode PWM step-down converter. It is ideal for

portable equipment which requires very high current

up to 2.0A from single-cell Lithium-ion batteries while

still achieving over 96% efficiency during peak load

conditions. The LP3219 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 noisy sensitive applications.

The LP3219 can supply up to 2.0A output load current

and the output voltage can be regulated as low as

0.61V. 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 LP3219 is available with adjustable (0.61V to VIN)

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

SOT23-5 package and is rated over the temperature

range of -40°C to +85°C.

Order Information

LP3219 □ □ □ □

F: Pb-Free

Package Type

B5: SOT23-5

VOUT Type

A: Adjustable

Features



Input Voltage Range: 2.5V to 5.5V



Output Voltage Range: 0.61V to VIN



2.0A Output Current



Low R(DSON) Internal Switches:80mΩ/70mΩ



High Efficiency: Up to 96%



100% Duty Cycle in Dropout



Low Shutdown Current: <1uA



1.5MHz Switching Frequency



Soft star Function



Short Circuit Protection



Thermal Fault Protection



SOT23-5Package



RoHS Compliant and 100% Lead (Pb)-Free

Applications



Portable Instruments



DSP Core Supplies



Cellular Phone and Smart mobile phone



PDA



GPS Applications

Marking Information

Device

Marking

Package

Shipping

LP3219

LPS

A3YWX

SOT23-5

3K/REEL

Marking indication:

Y:Production year W:Production week X:Production batch