The MediaTek MT6357 is a power management system IC optimized for 2G/3G/4G mobile phones and smartphones, containing 5 step-down converters and 29 LDOs, optimized for specific 2G/3G/4G smartphone subsystems. Advanced controls are available for power-up, battery charging, and RTC alarms. The MT6357 is optimized for maximum battery life, allowing the RTC circuit to remain active for several hours without a battery. The MT6357 uses an SPI interface and two SRCLKEN control pins to control the buck converter, LDO, and various drivers; It provides enhanced security controls and protocols for the handshake with the BB. The MT6357 is available in a 209-pin VFBGA package. The operating temperature range is -30 to +85°C.

features ● Handles all 2G/3G/4G smartphone baseband power management ●Input range: 2.6V~5V ● 5 buck converters and 29 LDOs optimized for specific 2G/3G/4G smartphone subsystems ● Full set of high-quality audio features: support uplink/downlink audio codec. ●SPI interface ● USB Battery Charging Specification Version BC1.2 Compliance ●Overcurrent and thermal overload protection ●Programmable under-voltage lockout protection ●Watchdog reset ●Flexible hardware PMIC reset function ● Power-on reset and start timer ●Precision voltage, temperature and current measurement fuel gauge ●209-pin VFBGA package The MT6357 is a fully integrated PMIC target for smartphone power supply vendors. Below is a block diagram of the MT6357 PMIC.


PMIC function blocks The MT6357 manages the power supply of baseband processors, SIM cards, cameras, vibrators, and more. The MT6357 includes the following simulation features for use on smartphone platforms. ●LDO & BUCK: Provides stable lower output voltage levels from lithium-ion batteries ●Sink current (ISINK) driver: The sink current used for the indicator ●Vibrator driver: Provide regulated power supply for vibrator. ●AUXADC: 15-bit analog-to-digital converter for thermal/accessory detection monitoring and measurement ●Controller: Generate power-on/power-down sequences, system resets, and exception handling functions ● Charger Controller: Control/protect the battery charging program ● A full set of high-quality audio functions: support uplink and downlink audio CODEC ● Fuel Gauge: Supports accurate battery capacity monitoring The following section will explain a more detailed description of each subblock.