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MAX8939EWVT Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX8939EWVT Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 43 page  _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. System Power Management for Mobile Handset 19-5843; Rev 0; 5/11 Typical Operating Circuit appears at end of data sheet. General Description The MAX8939 power management IC contains the nec- essary supplies and features for supporting cell phone designs based on the Intel Mobile Communications (IMC) 61XX 3G platform. Designed to power all peripheral com- ponents in the platform, the MAX8939 also provides the necessary 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 IC is exposed to high ambient temperatures, allowing maximum charging current with- out damaging the IC. A dedicated current regulator is included for driving a charge indicator LED. Four programmable low-noise, low-dropout linear regula- tors (LDOs) provide the supply for noise sensitive periph- erals. A high power vibrator driver is I2C programmable in 70 PWM levels and 4 output voltages. The MAX8939 also offers 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 is a highly integrated IC that requires very few external components and is 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) Programmable Top-Off Current Threshold Proprietary Die Temperature Regulation Control 4.1V to 10V Input Voltage Range 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 2.7V to 5.5V Supply Voltage Range S Thermal Shutdown +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Ordering Information EVALUATION KIT AVAILABLE PART TEMP RANGE PIN-PACKAGE MAX8939EWV+T -40NC to +85NC 30 WLP (0.5mm pitch) |
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