ROHM Semiconductor’s BD71815AGW is a single-chip power management IC optimized for battery-powered portable devices using either i.MX 6 or 7 family of SoCs. This results in significantly reduced power consumption during both standby and normal operation, prolonging battery life considerably. The IC integrates five buck converters, eight LDOs, a boost driver for LED, and a 500 mA 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 6 MHz, which allows the use of smaller and cheaper inductors and capacitors. The regulator supplying the processor core also supports dynamic voltage scaling (DVS).

Features

• Optimized for single/dual core processors such as NXP i.MX 6UL, 6SL/SLL, i.MX 7D/S, 7ULP, and similar SoCs
• Five programmable 6 MHz buck converters (two with DVS), and eight LDOs (five programmable, three fixed)
  • Three LDOs for general purpose
  • LDO for DDR reference voltage (DV_REF)
  • 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
• Power path management for DC input and battery
• Fuel gauge with coulomb counter using 15-bit ƩΔ ADC for charging/discharging
• 1S JEITA-compliant linear Li+ battery charger with integrated 30 V OVP
  • Selectable charging voltage: 3.72 V to 4.34 V
  • 100 mA to 500 mA programmable charge current
  • Up to 2000 mA with external MOSFET
• 24 V boost, 25 mA LED driver with dimming
• 32 kHz crystal driver and RTC
• Battery monitoring and alarm output
• Highly OTP configurable and software programmable
• Very low 20 µA quiescent current with RTC, fuel gauge, and 1 LDO on
• LED Indicator for charger status
• I²C interface - 100 kHz, 400 kHz, and 1 MHz
• WL-CSP, 9 x 9 balls, 4 mm x 4 mm x 0.62 mm