BD71815AGW Datasheet, PDF (1/107 Pages) Rohm – System PMIC for Battery Powered Systems

Datasheet
System PMIC for
Battery Powered Systems
BD71815AGW
General Description
BD71815AGW is a single-chip power management IC
for battery-powered portable devices. The IC integrates
5 buck converters, 8 LDOs, a boost driver for LED, and
a 500mA single-cell linear charger. Also included is a
Coulomb counter, a real-time clock (RTC), a 32 kHz
crystal oscillator and a general-purpose output (GPO).
The IC’s buck converters supply power to the application
processor as well as system peripherals such as DDR
memory, wireless modules, and touch controllers. These
regulators maintain high efficiency over a wide range of
current loads by supporting both PFM and PWM modes.
They also operate at a high switching frequency of
6MHz, which allows the use of smaller and cheaper
inductors and capacitors. The regulator supplying the
processor core also supports Dynamic Voltage Scaling
(DVS).
Features
 5 buck converters:
- 3 1000mA buck converters
- 1 800mA buck converter
- 1 500mA buck converter
 3 general-purpose LDOs
- 2 100mA LDOs
- 1 50mA LDO
 LDO for DDR Reference Voltage (DVREF)
 LDO for Secure Non-Volatile Storage (SNVS)
 LDO for Low-Power State Retention (LPSR)
 LDO for SD Card with dedicated enable terminal
 LDO for SD Card Interface with dedicated terminal
to dynamically change output voltage
 White LED Boost Converter
-25mA LED Boost Converter
 Single-cell Linear LIB Charger with 30V OVP
-Selectable charging voltage: 3.72 to 4.34 V
-Programmable charge current: 100 to 500mA
-Support for up to 2000mA charge current using
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 ΔΣ-ADC with External Current Sense
Resistor (10 mΩ, ±1% or 30mΩ, ±1%)
-1-sec cycle, 28-bit accumulation
-Coulomb count while charging/discharging
 Battery Monitoring and Alarm Output
-Under Voltage Alarm while discharging
-Over Current Alarm
-Over/Under Temperature Alarm
-Programmable thresholds and time durations
 Real Time Clock with 32.768kHz crystal oscillator
-32.768kHz clock output
(Open Drain or CMOS Output Selectable)
 1 GPO (Open Drain or CMOS Output Selectable)
 Power Control I/O
-Power On/Off control input
-Standby Input for switching RUN/SUSPEND State
-Reset Input to reset hung PMIC
-Power On Reset output
 1 LED Indicator
-Indicate charger status
 I2C interface
Applications
 E-Book reader
 Media players with smart devices, wearables
 Portable Navigation Devices with Home POS,
Human Machine Interfaces
Key Specifications
 Input Voltage Range (DCIN):
3.5V to 28V
 Input Voltage Range (VIN, VSYS): 2.9V to 5.5V
 Input Voltage Range (DVDD):
1.5V to 3.4V
 Off Current:
20 μA (Typ)
[RTC+ Coulomb counter+ LDO_SNVS only]
 Operating temperature range: -40°C to +85°C
Package
UCSP55M4C
W(Typ) x D(Typ) x H(Max)
4.0mm x 4.0mm x 0.62mm
D71815A
(Unit :mm)
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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TSZ02201-0Q4Q0AB00610-1-2
5.Oct.2016 Rev.001