MAX8808 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN

19-3670; Rev 0; 4/05
EVAALVUAAILTAIOBNLEKIT
1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
General Description
The MAX8808X/MAX8808Y/MAX8808Z intelligent,
stand-alone constant-current/constant-voltage (CCCV),
thermally regulated linear chargers are designed for
charging a single-cell lithium-ion (Li+) battery. The
MAX8808X/MAX8808Y/MAX8808Z integrate the cur-
rent-sense circuit, MOS pass element, and thermal-reg-
ulation circuitry, and eliminate the reverse-blocking
Schottky diode to create the simplest and smallest
charging solution for handheld equipment.
The MAX8808X functions as a stand-alone charger to
control the charging sequence from the prequalification
state through fast-charge, top-off charge, and full-
charge indication. The MAX8808Y and MAX8808Z elimi-
nate the prequalification state to allow startup into a load
without a battery. Proprietary thermal-regulation circuitry
limits the die temperature when fast-charging or while
exposed to high ambient temperatures, allowing maxi-
mum charging current without damaging the IC.
The MAX8808X/MAX8808Y/MAX8808Z achieve high
flexibility by providing an adjustable fast-charge current
with an external resistor. Other features include a bat-
tery charging-status indicator (CHG), an active-low con-
trol input (EN) for the MAX8808X and MAX8808Z
(active-high control input for the MAX8808Y), and an
active-low input power-source detection output (ACOK).
The MAX8808X/MAX8808Y/MAX8808Z accept a
+4.25V to +15V supply, but disable charging when the
input voltage exceeds +7V to protect against unquali-
fied or faulty AC adapters. The MAX8808X/MAX8808Y/
MAX8808Z operate over the extended temperature
range (-40°C to +85°C) and are available in a compact
8-pin thermally enhanced 2mm x 2mm TDFN package
with 0.8mm (max) height.
Applications
Cellular and Cordless Phones
Smartphones and PDAs
Digital Still Cameras and MP3 Players
USB Appliances
Charging Cradles and Docks
Bluetooth^® Equipment
Pin Configuration appears at end of data sheet.
Features
♦ Stand-Alone Linear 1-Cell Li+ Battery Charger
♦ No External FET, Reverse Blocking Diode, or
Current-Sense Resistor Required
♦ Programmable Fast-Charge Current (1A max)
♦ Proprietary Die Temperature Regulation Control
(+115°C)
♦ +4.25V to +15V Input Voltage Range with Input
OVP Above +7V
♦ Charge-Current Monitor for Fuel Gauging
♦ Low Dropout Voltage—300mV at 500mA
♦ Input Power-Source Detection Output (ACOK) and
Charge-Enable Input (EN or EN)
♦ Soft-Start Limits Inrush Current
♦ Charge-Status Output (CHG) for LED or
Microprocessor (µP) Interface
♦ Tiny 2mm x 2mm 8-Pin TDFN Package, 0.8mm
(max) Height
Ordering Information
PART
PIN-PACKAGE
TOP
MARK
MAX8808XETA+ 8 TDFN-EP* 2mm x 2mm (T822-1)
MAX8808YETA+ 8 TDFN-EP* 2mm x 2mm (T822-1)
MAX8808ZETA+ 8 TDFN-EP* 2mm x 2mm (T822-1)
AAC
AAB
AAA
All devices specified over the -40°C to +85°C operating range.
+Denotes lead-free package.
*EP = Exposed paddle.
Typical Operating Circuit
4.25V TO 15V
IN
BATT
4.2V
MAX8808X
Li+
MAX8808Y
CHG MAX8808Z
OFF
ON
EN*
ACOK
ISET
VL
GND
Bluetooth is a registered trademark of Bluetooth SIG.
*MAX8808Y USES ACTIVE-HIGH LOGIC FOR EN.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.