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LLXX22220033
LX2203
TM Li-Ion Battery Charger
PRODUCTION DATA SHEET
DESCRIPTION KEY FEATURES
Up to 1A charge current
The LX2203 is a tiny linear battery The LX2203 charges the battery in
Low drop out design
charger for Lithium Ion or Lithium two phases: constant current and
Reverse leakage protection
Polymer batteries. The LX2203 constant voltage. A reduced current
Linear thermal control loop
includes built in MOSFET, accurate conditioning mode is provided for
Pre-charge conditioning
current and voltage regulation, reverse deeply discharged batteries. The
Programmable Termination
blocking protection, over temperature LX2203 automatically restarts if the
Current
control, and charge status indicator. battery voltage falls below the top-off
Short Circuit protected
The accurate programmable charge threshold. The LX2203 enters a low
Small 3x3mm MLP package
current and independent termination quiescent current sleep mode when
current programming make it easy to power is removed.
APPLICATIONS
logically reprogram the charge current
limit at any time.
PDAs, MP3 Players
Cell Phones
Charging cradles
IMPORTANT: For the most current data, consult MICROSEMIs website: WWW.Microsemi .COM
PPAACCKKAAGGEE DDAATTAA
LX2203
TM Li-Ion Battery Charger
PRODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT
Supply Voltage (VIN)....................................................................................... -0.3V to 7V
Input Signals (SHDN, EN,CMP) ...................................................................... -0.3V to 7V
Battery Charging Current (I )....................................................................................1.2A
BAT
1 10 BAT
VIN
Operating Junction Temperature................................................................... -40C to 150C
2 9
Storage Temperature Range.........................................................................-65C to 150C VIN BAT
RoHS / Pb-free Peak Package Solder Reflow Temp(40 seconds max. exposure) ............260C (+0 -5)
3 8 CMP
STAT
4 Connect Bottom to 7
CTP EN
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Power GND
Ground. Currents are positive into, negative out of specified terminal.
56
GND CCP
LD PACKAGE
(Top View)
THERMAL DATA
RoHS / Pb-free 100% Matte Tin Lead Finish
Plastic Micro Leadframe Package 10-Pin
LD
THERMAL RESISTANCE-JUNCTION TO AMBIENT, 49C/W
JA
Junction Temperature Calculation: T = T + (P x ).
J A D JA
The numbers are guidelines for the thermal performance of the device/pc-board system. All of the
JA
above assume no ambient airflow.
FUNCTIONAL PIN DESCRIPTION
Name Description
Charging Output - This pin is wired to the positive terminal of the battery. (The negative battery terminal is wired
BAT
to GND.)
Charge Current Programming Pin - A resistor (Rccp) is connected between this pin and GND. See application
CCP
section for programming information.
CMP Compensation Pin Apply a 0.01F capacitor between CMP and VIN pins.
Charge Termination Programming Pin A resistor (Rctp) is connected between this pin and GND See
CTP
application section for programming information.
Enable - Applying a TTL compatible Hi signal enables the charger, a Low signal disables the charger and puts it
EN
in sleep mode.
GND Common Ground.
STAT Status - This pin is a logic low level when the battery is being charged. Pin can sink up to 5mA.
VIN Voltage Input Supply Voltage. Must be greater than VBAT to charge.
Copyright 2004
Microsemi
Page 2
Rev. 1.0a, 2005-08-10
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570