MAX8939_11 Datasheet, PDF (1/44 Pages) Maxim Integrated Products – System Power Management for Mobile Handset

19-5843; Rev 1; 11/11
EVAALVUAAILTAIOBNLEKIT
System Power Management
for Mobile Handset
General Description
The MAX8939/MAX8939A power management ICs contain
the necessary supplies and features for supporting cell
phone designs based on the Intel Mobile Communications
(IMC) 61XX 3G platform. Designed to power all peripheral
components in the platform, the ICs also provide the neces-
sary signals to control the 61XX baseband processor.
The integrated lithium-ion (Li+) charger is protected up
to 28V input and features a protected output voltage
for supply of a USB transceiver. Proprietary thermal-
regulation circuitry limits the die temperature during
fast-charging or when the ICs are exposed to high ambi-
ent temperatures, allowing maximum charging current
without damaging the ICs. A dedicated current regulator
is included for driving a charge indicator LED.
Four programmable low-noise, low-dropout linear regu-
lators (LDOs) provide the supply for noise sensitive
peripherals. A high power vibrator driver is I²C program-
mable in 70 PWM levels and 4 output voltages. The ICs
also offer two step-up converters; one high power, low
voltage (5V) to supply an external audio amplifier or
camera flash, and a high voltage (28V) supply for the
display and keyboard backlight. Two integrated 25mA
current regulators provide independent ramp-up and
ramp-down control, programmable through I²C.
The MAX8939/MAX8939A are highly integrated ICs that
require very few external components and are available in a
compact 2.5mm x 3.0mm, 0.65mm max height wafer level
package (WLP).
Applications
Companion Chip for Cell Phones/Smartphones
Features
S Step-Up Converter
700mA Guaranteed Output Current
I²C Programmable Output 3.5V to 5.0V in 16 Steps
Over 90% Efficiency
On-Chip FET and Synchronous Rectifier
Fixed 2MHz PWM Switching
Small 2.2µH to 10µH Inductor
S WLED Boost Converter
28V Max Step-Up Output Voltage
60mA Output Current
Integrated nMOS Power Switch
Over 90% Efficiency
Fixed 2MHz Switching
Small 4.7µH to 10µH Inductor
Two 25mA Individually Programmable Current
Regulators
I²C Programmable Output Current (50µA to
25.25mA) with 128-Step Pseudo Log Dimming
Individually Programmable Ramp (Up/Down)
Timers
Low Dropout (150mV max)
S Linear One-Cell Li+ Battery Charger
No External MOSFET, Reverse Blocking Diode,
or Current-Sense Resistor
Programmable Fast-Charge Current (1.5ARMS max
for the MAX8939 or 850mARMS max for the
MAX8939A)
Programmable Top-Off Current Threshold
Proprietary Die Temperature Regulation Control
4.1V to 10V Input Voltage Range (MAX8939)
4.1V to 6.25V Input Voltage Range (MAX8939A)
with Input Overvoltage Protection Up to 28V
Low-Dropout Voltage (300mV at 500mA)
Input Power-Source Detection Output
Input Overvoltage Protected 4.75V Output
(SAFE_OUT) from IN
Charge Current Monitor Output
Indicator LED
Hardware Input Enable
5s Watchdog Feature During Charge
S Four Low-Noise LDOs
1x 400mA, 2 x 200mA and 1x 100mA Output
Current
High 65dB (typ) PSRR
Low Noise (45µVRMS typ)
1.7V to 3.2V Programmable Output Voltage
Low Quiescent Current (25µA typ)
400mA LDO with Hardware Enable Input
S Vibrator Driver
Guaranteed 200mA Output Current
Programmable Output Voltage 1.3V to VINVIB
Repetition Frequency 23.8kHz
PWM Speed Control in 70 steps
Active Stop Brake
S Control Interface for 61XX Baseband
MAX8939 Control Through I²C
RESET_IN Reset Input
Charger Detect PWR_ON_CMP Output
IRQ Interrupt Output
S 2.9V to 5.5V Supply Voltage Range
S Thermal Shutdown
Ordering Information
PART
MAX8939EWV+T
TEMP RANGE
-40NC to +85NC
MAX8939AEWV+T -40NC to +85NC
PIN-PACKAGE
30 WLP
(0.5mm pitch)
30 WLP
(0.5mm pitch)
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit appears at end of data sheet.
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