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PDF MAX8808Z Data sheet ( Hoja de datos )
| Número de pieza | MAX8808Z | |
| Descripción | (MAX8808x) 1A Linear Li+ Battery Chargers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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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-
trolwww.DataSheet4U.com 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
OFF
ON
IN BATT
MAX8808X
MAX8808Y
CHG MAX8808Z
EN* ACOK
ISET
GND
VL
4.2V
Li+
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.
1 page  
1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
Pin Description
PIN NAME
FUNCTION
1 IN Input Supply Voltage. Bypass IN to GND with a 1µF or larger ceramic capacitor to improve line
noise and input transient rejection.
2 VL Internally Generated Logic Supply for IC. Bypass VL to GND with a 0.47µF ceramic capacitor.
3
GND
Ground. Connect GND and exposed pad to a large copper ground plane for maximum power
dissipation. Connect GND to the exposed paddle directly under the IC.
Charge-Current Program and Fast-Charge Current Monitor. Output current from ISET is 1.08mA
4
ISET
per amp of battery charging current. Set the charging current by connecting a resistor from ISET
to GND. Fast-charge current = 1302V / RISETΩ.
Charging Indicator. CHG is an open-drain output that goes low (LED capable) when charging
5
CHG
begins. CHG is high impedance when the battery current drops below 10% of the fast-charging
current, or when the IC is disabled. Connect a pullup resistor to the µP’s I/O voltage when
interfacing with a µP logic input.
6
EN
(MAX8808X/
MAX8808Z)
Logic-Level Enable Input. Drive EN high to disable charger. Pull EN low or leave unconnected for
normal operation. EN has an internal 200kΩ pulldown resistor.
EN Logic-Level Enable Input. Drive EN low to disable charger. Pull EN high for normal operation. EN
(MAX8808Y) has no internal pullup or pulldown resistor.
Input Status Indicator. ACOK is an open-drain output that asserts low when VIN < +7V and (VIN –
7
ACOK
VBATT) ≥ 40mV. ACOK requires an external 100kΩ pullup resistor. ACOK is high impedance
during shutdown.
8
BATT
Li+ Battery Connection. Bypass BATT to GND with a ceramic capacitor of at least 2.2µF per
ampere of charge current.
— EP Exposed Paddle. Connect the exposed paddle to a large ground plane for maximum power
dissipation. Connect GND to the exposed paddle directly under the IC.
_______________________________________________________________________________________ 5
5 Page 
1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
TOP VIEW
Pin Configuration
PROCESS: BiCMOS
8765
Chip Information
MAX8808
1 234
TDFN
( ) INDICATES THE MAX8808Y.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAX8808Z.PDF ] | |
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