Preliminary Datasheet
LP28300
2A Synchronous Buck Li-ion Charger
General Description
The LP28300 is a 2A Li-Ion battery charger intended for5V
wall adapters. It utilizes a 1.5MHz synchronous buck
converter topology to reduce power dissipation during
charging. Low power dissipation, an internal MOSFET
allow a physically small charger that can be embedded in a
wide range of handheld applications. The LP28300 includes
complete charge termination circuitry, automatic recharge
and a ±1% 4.2V float voltage. Input short-circuit protection
is included so no blocking diode is required.
Battery charge current, charge timeout and end-of-charge
indication parameters are set with external components.
Additional features include shorted cell detection,
temperature qualified charging and overvoltage protection.
The LP28300 is available in a low profile (0.75mm)
10-lead(3mm × 3mm) DFN package.
Features
Very Low Power Dissipation
2A Maximum Charge Current
No External MOSFETs and 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
Drainage Charge Current Thermal Regulation Status
Outputs for LED or System Interface
Optional Battery Temperature Monitoring Before and
During Charge Automatic Sleep Mode for Low-Power
Consumption Available in 3mm × 3mm TDFN-10
Package
RoHS Compliant and 100% Lead (Pb)-Free
Order Information
LP28300 -
□ □
□
F: Pb-Free
Package Type
QV: TDFN-10
Typical Application Circuit
Applications
Portable Media Players
Cellular and Smart mobile phone
PDA/DSC
Handheld Battery-Powered Devices
Handheld Computers
Charging Docks and Cradles
Marking Information
Please see website.
LP28300 – 01
Version
1.1 Datasheet
Sep.-2010
www.lowpowersemi.com
Page 1 of 10
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