BD71805MWV Datasheet, PDF (1/100 Pages) Rohm – System PMIC for Battery Powered Systems

System PMIC for
Battery Powered Systems
BD71805MWV
General Description
The BD71805MWV is a single chip power management
IC for battery-powered portable devices. It integrates 4
Bucks, 3 LDOs, 2A single-cell linear charger, OVP,
Coulomb counter, RTC, 32 kHz crystal circuitry and 3
GPOs.
Four highly efficient 2.5MHz step-down converters
supply power to the application processor as well as
system peripherals such as DDR memory, wireless
modules, and touch controller. The regulator to the
processor core supports DVS. The regulators maintain
high efficiency over a wide range of current loads by
supporting both PFM and PWM modes. High switching
frequency allows the use of smaller and cheaper
inductors and capacitors.
Features
 4 Buck Converters:
- 1-2000mA Buck
- 3-1000mA Bucks
 3 LDOs (General purpose)
- 3-300mA LDOs
 LDO for DDR Reference Voltage
 LDO for Secure Non-Volatile Storage (SNVS)
 Single-cell Linear LIB Charger with 30V-OVP
- Selectable Charging Voltage : 3.72 to 4.34 V
- Programmable Charge Current : 100 to 2000mA
- DCIN Over Voltage Protection
- Battery Over Voltage Protection
- Support Battery Supplement Mode
- 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%)
- 1-sec cycle, 28-bit Accumulation
- Coulomb Count while Charging/Discharging
 Battery Monitoring and Alarm Output
- Under Voltage Alarm while Discharging
- Over Discharge Current Alarm
- Over/Under Temperature Alarm
- Programmable Thresholds and Time Durations
- Automatic Low Voltage Mode (Battery Protection)
3.5V Detection :
Interrupt to Processor to Ask User Plug-in
3.3V Detection :
Interrupt to Processor to Indicate Battery Critically
Low Condition
 Real Time Clock with 32.768kHz Crystal Oscillator
- 32.768kHz Clock Output
(Open Drain or CMOS Output Selectable)
 3 GPOs (Open Drain or CMOS Output Selectable)
 Power Control I/O
- Power On/Off Control Input
- Standby Input for Switching ON / STANDBY Mode
- Reset Input to Reset Hung PMIC
- Power On Reset Output
 I2C Interface
Applications
 E-Book Reader
 Portable Media Players
 Portable Navigation Devices
Key Specifications
 Input Voltage Range (DCIN):
3.5V to 28V
 Input Voltage Range (VIN,VSYS): 3.3V to 5.5V
 Input Voltage Range (DVDD):
1.5V to 3.4V
 Off Current :
25 μA (Typ)
[RTC+ Coulomb counter+ LDO_SNVS+ 32kOSC only]
 Operating temperature range:
-40°C to +85°C
Package
UQFN64MV8080
W(Typ) D(Typ) H(Max)
8.0mm x 8.0mm x 1.0mm
Status of this document
The English version of this document is formal specification. A customer may use this translation version only for a reference to help
reading the formal version. If there are any differences in translation version of this document formal version takes priority.
○Product structure：Silicon monolithic integrated circuit
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays
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TSZ02201-0Q4Q0AB00050-1-2
27.Feb.2015 Rev.001