MAX8606_08 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – USB/AC Adapter, Li+ Linear Battery Charger with Integrated 50mΩ Battery Switch in TDFN

19-3795; Rev 1; 12/08
EVAALVUAAILTAIOBNLEKIT
USB/AC Adapter, Li+ Linear Battery Charger
with Integrated 50mΩ Battery Switch in TDFN
General Description
The MAX8606 complete 1-cell Li+ battery charge-man-
agement IC operates from either a USB port or AC
adapter. It integrates a battery disconnect switch, cur-
rent-sense circuit, PMOS pass element, and thermal-
regulation circuitry, while eliminating the external
reverse-blocking Schottky diode, to create a simple
and small charging solution. The charging sequence
initiates from power-OK indication, through prequalifi-
cation, fast-charge, top-off charge, and finally charg-
ing-complete indication for single-cell Li+ batteries.
Charging is controlled using constant current, constant
voltage, or constant die-temperature (CCCVCT_J) regu-
lation for safe operation in handhelds.
Two logic inputs (EN1 and EN2) select suspend mode,
100mA, 500mA, or ≤1A input current limits to suit USB
requirements. Proprietary thermal-regulation circuitry
limits the die temperature to +100°C to prevent exces-
sive heat on the system PC board. Additional safety
features include an NTC thermistor input (THM) and
internal timers to protect the battery. A 3.5V to 4.2V SYS
output, in conjunction with the low-R_DSON battery
switch, powers the system even when the battery is
deeply discharged or not installed. The IC also offers a
+3.3V/500µA output (VL), a charging status flag (CHG),
and an input-supply detection flag (POK). The
MAX8606 operates from a +4.25V to +5.5V supply and
includes undervoltage lockout below +3.4V and over-
voltage protection up to +14V.
Applications
Cellular Phones, Smartphones, PDAs
Digital Cameras, MP3 Players
USB Appliances, Charging Cradles and Docks
TOP VIEW
Pin Configuration
14 13 12 11 10 9 8
MAX8606
12 34 567
Features
♦ Small 3mm x 3mm Thermally Enhanced TDFN
Package (0.8mm max height)
♦ USB-Compliant Suspend Mode (20µA)
♦ Selectable 100mA, 500mA, and Up to 1A Input
Current Limits
♦ USB or AC Adapter Input
♦ +6V to +14V Input Overvoltage Protection
♦ Input UVLO Below +4V Rising (3.5V Falling)
♦ Automatic Current Sharing Between Battery
Charging and System
♦ Die Temperature Regulation (+100°C)
♦ Prequal, Fast-Charge, and Top-Off Timers
♦ Low Dropout Voltage, 250mV at 0.5A
♦ NTC Thermistor Input
♦ Charge Status and Input-Supply Detection Flags
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX8606ETD+ -40°C to +85°C ^{14 TDFN 3mm x}
3mm (T1433-1)
+Denotes lead-free/RoHS-compliant package.
TOP
MARK
AAF
Typical Operating Circuit
USB/AC-ADAPTER
OVP UP TO 14V
INPUT
CURRENT
SELECTION
μP
STAND-ALONE
IN
GND
VL
CONTROL
STATUS
INDICATORS
CHG
POK
SYS ^{3.5V TO 4.2V}
0.1μF
EN1
BAT
EN2
THM
TMR
Li+
SETI
MAX8606
TDFN
________________________________________________________________ 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.