Datasheet System PMIC for Battery Powered Systems BD71815AGW General Description Battery Monitoring and Alarm Output BD71815AGW is a single-chip power management IC - Under Voltage Alarm while discharging for battery-powered portable devices. The IC integrates - Over Current Alarm 5 buck converters, 8 LDOs, a boost driver for LED, and - Over/Under Temperature Alarm a 500mA single-cell linear charger. Also included is a - Programmable thresholds and time durations Coulomb counter, a real-time clock (RTC), a 32 kHz Real Time Clock with 32.768kHz crystal oscillator crystal oscillator and a general-purpose output (GPO). - 32.768kHz clock output (Open Drain or CMOS Output Selectable) The ICs buck converters supply power to the application 1 GPO (Open Drain or CMOS Output Selectable) processor as well as system peripherals such as DDR Power Control I/O memory, wireless modules, and touch controllers. These - Power On/Off control input regulators maintain high efficiency over a wide range of - Standby Input for switching RUN/SUSPEND State current loads by supporting both PFM and PWM modes. - Reset Input to reset hung PMIC They also operate at a high switching frequency of - Power On Reset output 6MHz, which allows the use of smaller and cheaper 1 LED Indicator inductors and capacitors. The regulator supplying the - Indicate charger status processor core also supports Dynamic Voltage Scaling I2C interface (DVS). Applications Features E-Book reader 5 buck converters: Media players with smart devices, wearables - 3 1000mA buck converters Portable Navigation Devices with Home POS, - 1 800mA buck converter Human Machine Interfaces - 1 500mA buck converter 3 general-purpose LDOs - 2 100mA LDOs Key Specifications - 1 50mA LDO Input Voltage Range (DCIN): 3.5V to 28V LDO for DDR Reference Voltage (DVREF) Input Voltage Range (VIN, VSYS): 2.9V to 5.5V LDO for Secure Non-Volatile Storage (SNVS) Input Voltage Range (DVDD): 1.5V to 3.4V LDO for Low-Power State Retention (LPSR) Off Current: 20 A (Typ) LDO for SD Card with dedicated enable terminal RTC+ Coulomb counter+ LDO SNVS only LDO for SD Card Interface with dedicated terminal Operating temperature range: -40C to +85C to dynamically change output voltage White LED Boost Converter - 25mA LED Boost Converter Package W(Typ) x D(Typ) x H(Max) Single-cell Linear LIB Charger with 30V OVP UCSP55M4C 4.0mm x 4.0mm x 0.62mm - Selectable charging voltage: 3.72 to 4.34 V - Programmable charge current: 100 to 500mA - Support for up to 2000mA charge current using D71815A external MOSFET - DCIN over voltage protection - Battery over voltage protection - Battery Supplement Mode support - Battery Short Circuit Detection Voltage Measurement for Thermistor - Bias voltage output for External Thermistor Embedded Coulomb Counter for Battery Fuel Gauging - 15-bit -ADC with External Current Sense Resistor (10 m, 1% or 30m, 1%) - 1-sec cycle, 28-bit accumulation - Coulomb count while charging/discharging (Unit :mm) Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0Q4Q0AB00610-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/103 TSZ22111 14 001 3.Mar.2017 Rev.002 BD71815AGW Contents General Description ........................................................................................................................................................................ 1 Features.......................................................................................................................................................................................... 1 Applications .................................................................................................................................................................................... 1 Key Specifications ........................................................................................................................................................................... 1 Package W(Typ) x D(Typ) x H(Max) ......................................................................................................................... 1 Contents ......................................................................................................................................................................................... 2 Typical Application Circuit ............................................................................................................................................................... 3 Block Diagram ................................................................................................................................................................................ 4 Pin Configuration ............................................................................................................................................................................ 5 Pin Descriptions .............................................................................................................................................................................. 6 PCB Layout Recommendations ...................................................................................................................................................... 8 Description of Blocks ...................................................................................................................................................................... 9 1. High Efficiency Buck Converters (BUCK1 5) and LDOs .................................................................................................... 9 2. Power ON/OFF Sequence ................................................................................................................................................. 11 3. States of Operation ............................................................................................................................................................ 12 4. Dynamic Voltage Scaling (DVS) Control ............................................................................................................................ 14 5. LDO4 and LDO5 Control (for SD Card) .............................................................................................................................. 15 6. Real Time Clock (RTC) Block............................................................................................................................................. 16 7. Over Voltage Protection (OVP) Block ................................................................................................................................. 21 8. Battery Charger Block ........................................................................................................................................................ 21 9. Coulomb Counter Block ..................................................................................................................................................... 25 10. 12-bit ADC (SAR) Block ..................................................................................................................................................... 26 11. Battery Monitor Block ......................................................................................................................................................... 26 12. White LED Boost Converter ............................................................................................................................................... 27 13. I2C Bus Interface Block ...................................................................................................................................................... 27 14. Interrupt Handling............................................................................................................................................................... 31 Absolute Maximum Ratings (Ta=25C) ......................................................................................................................................... 32 (Note 1) Thermal Resistance ............................................................................................................................................................. 32 Recommended Operating Conditions ........................................................................................................................................... 32 Electrical Characteristics............................................................................................................................................................... 33 Register Map ................................................................................................................................................................................ 42 Typical Performance Curves ......................................................................................................................................................... 87 I/O Equivalent Circuits .................................................................................................................................................................. 95 Operational Notes ......................................................................................................................................................................... 98 Ordering Information ................................................................................................................................................................... 101 Marking Diagrams ....................................................................................................................................................................... 101 Physical Dimension Tape and Reel Information .......................................................................................................................... 102 Revision History .......................................................................................................................................................................... 103 www.rohm.com TSZ02201-0Q4Q0AB00610-1-2 2016 ROHM Co., Ltd. All rights reserved. 2/103 3.Mar.2017 Rev.002 TSZ2211115001