LP8765-E PRODUCT BRIEF High Performance Power Management Unit for Handset Applications General Description Features The LP8765 is a complete Power Management Unit (PMU) designed for handset applications. The LP8765 PMU contains a 28V Over-Voltage Protection (OVP) single-input linear Li-Ion battery charger, backup battery charger, 10 lowdropout voltage regulators including 4 A-type LDOs, 4 D-type LDOs, one LILO LDO and one 28V OVP LDO, 2 high-efficiency buck regulators, 2 comparators, 3 current sinks, 12-bit ADC, real-time clock, 32 KHz OSC and one 2.5V reference output voltage. Programming is handled via a high-speed serial interface to program on/off conditions and output voltages of individual regulators, and to read status information of the PMU. The LP8765 can safely charge and maintain a single cell LiIon battery operating from an AC adapter or USB power source. The Li-Ion charger requires few external components and integrates the power FET. Charging is thermally regulated to obtain the most efficient charging rate for a given ambient temperature. A built-in OVP circuit at the charger inputs protects the PMU from input voltages up to +28V, eliminating the need for any external protection circuitry. Buck regulators have an automatic switch to PFM mode at low-load conditions providing very good efficiency at low-output currents. A-type LDO regulators provide excellent PSRR and very low noise, 10 µV typ., ideally suited for supplying voltage to RF section. The real-time clock/calendar provides time interval information as well as two programmable alarms. The current sink provides 4-bit current resolution with 6-bit PWM dimming, up to 120 mA maximum load current. Two general-purpose comparators can be used for detecting external accessories like ear plugs, etc. Notice: This document is not a datasheet. For more information regarding this product or to order samples, please contact your local Texas Instruments sales office or visit http://www.ti.com. ■ Linear Li-Ion Battery Charger with Single Input © 2012 Texas Instruments Incorporated 301620 SNOSBA6F ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 50 mA to 1200 mA Charging Current 4.05V to 4.75V Termination Voltage 28V OVP on the VIN_CHG Input Charging from either AC Adaptor or USB Two Synchronous Magnetic Buck Regulators IOUT 600 mA and 500 mA High-efficiency PFM mode @ low IOUT Auto-Mode PFM/PWM Switch Programmable Peak Switching Current Limit Low-Inductance 2.2 µH @2 MHz Switching Frequency 3% Accurate Buck Regulators up to 90% Efficiency LDOs 4 x A-type LDOs (3 x 200 mA, 1 x 100 mA) 4 x D-type LDOs (2 x 200 mA, 1 x 300 mA, 1 x 400 mA) 1 x LILO LDO (1 x 300 mA) 1 x 28V OVP LDO for USB Transceiver (1 x 10 mA) 10 µV noise on A-type LDOs 2% typ. Output Voltage Accuracy on LDOs 12-bit A/D Converter Three Controllable Current Sinks Two Comparators Interrupt Request to Reduce S/W Polling 32.786 KHz OSC Real-Time Clock with Two Programmable Alarms Thermal Shutdown with Early Warning Alarm 49-bump micro SMD package 3.7 x 3.7 mm, 0.5 mm pitch Applications ■ GSM, GPRS, EDGE, CDMA & 3G Handsets www.ti.com LP8765-E PRODUCT BRIEF June 11, 2012 LP8765-E General Typical Application Diagram 30162001 www.ti.com 2 LP8765-E Physical Dimensions inches (millimeters) unless otherwise noted 49-bump thin micro SMD Package Package Number RLA49JJA X1 = 3.669 mm ±0.030 mm X2 = 3.669 mm ±0.030 mm X3 = 0.650 mm ±0.075 mm 3 www.ti.com LP8765-E PRODUCT BRIEF Notes www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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