LP78073A-01

Jun.-2015

www.lowpowersemi.com

Page 1 of 10

Preliminary Datasheet

LP78073A

1A Charge+ 2.7A Synchronous Boost PMIC

General Description

The LP78073A is a PMIC，which has 1ch Charger and 1ch

Synchronous Boost Converter with ESOP-8 package.

Its charger is a complete constant-current constant voltage

linear charger for single cell lithium-ion batteries. Furthermore,

the LP78073A is specifically designed to work within USB

power specifications. No external sense resistor is needed, and

no blocking diode is required due to the internal MOSFET

architecture. Thermal feedback regulates the charge current to

limit the die temperature during high power operation or high

ambient temperature. The charge voltage is fixed at 4.2V, and

the charge current can be ISET rammed externally with a single

resistor. The charger automatically terminates the charge cycle

when the charge current drops to 1/10th the ISET rammed

value after the final float voltage is reached. When the input

supply (wall adapter or USB supply) is removed, the LP78073A

automatically enters a low current state, dropping the battery

drain current to less than 8µA.

Other features include charge current monitor, under voltage

lockout, automatic recharge and a status pin to indicate charge

termination and the presence of an input voltage.

converter. Its PWM circuitry with built-in 2.7A Current 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 and its error amplifier is connected to an

internal 800mV precision reference voltage.

Order Information

LP78073A □ □ □

F: Pb-Free

Package Type

SP: ESOP-8

Features



Charger:



Programmable Charge Current Up to 1000mA



No MOSFET, Sense Resistor or Blocking Diode

Required



Constant-Current/Constant-Voltage Operation with

Thermal Regulation to Maximize Charge Rate

Without Risk of Overheating



Charges Single Cell Li-Ion Batteries Directly from

USB Port



8µA Supply Current in Shutdown



Drainage Charge Current Thermal Regulation Status

Outputs for LED or System Interface



Boost:



5V/1.2A Output Current @ Vin=3.3V



1MHz fixed frequency switching



High Switch On Current: 2.7A



Low RDS(ON) Integrated Power Mosfet



Efficiency is 95%



Built-in OTP, OCP, Soft-Star



Consumption Available in ESOP-8 Package



RoHS Compliant and 100% Lead (Pb)-Free

Applications



MID/Pad



Power Bank



Smart Phone



Bluetooth Applications

Marking Information

Device

Marking

Package

Shipping

LP78073ASPF

SP:ESOP-8

2.5K/REEL