SY8631BQCC

6-channel PMIC with 2 Step Down Buck Regulators,3 Low Dropout LDO and 1 Channel RESET Output

SY8631BQCC 6-channel PMIC with 2 Step Down Buck Regulators,3 Low Dropout LDO and 1 Channel RESET Output Datasheet

Parameters
Features
Description

Part number	SY8631BQCC
Vin (min) (V)	2.5
Vin (max) (V)	5.5
Channel(#)	5
Application	Portable media players
Features	2ch synchronous buck and 3ch LDO, One RESET output and forced PWM mode seletion
Package	QFN4x4-24

• Input Voltage Range: 2.5V to 5.5V

• Input Voltage Range for LDOs : 1.8V to 5.5V

• 2 Channels DCDC Regulators and 3 Channels LDO Regulators

• 1A Output Current Capability for Each DC/DC Regulator

• DC/DC Regulators Output Voltage Externally Adjustable

• 2.2MHz Switching Frequency

• Power Save Mode at Light Load Condition for Higher Efficiency

• Forced-PWM Mode Selection by Mode Pin

• Total 38uA Quiescent Current for DC/DC Regulators

• 400mA Output Current Capability for LDO1

• 200mA Output Current Capability for LDO2 and LDO3

• LDO1, LDO2 Output Voltage Externally Adjustable

• Fixed 1.5V Output Voltage for LDO3

• Hard Short Protection, Thermal Shut Down Protection

• RoHS Compliant and Halogen Free

• Compact Package: QFN4x4-24

SY8631B is integrated Power Management IC for applications powered by one Li-ion or Li-Polymer cell which require multiple power rails. It integrates 2 step-down Buck regulators, 3 low dropout LDOs and 1 channel output. The highly efficient, 2.2MHz step-down Buck regulators will target at providing the core voltage and I/O voltage in a processor based system. Each LDO operates with an input voltage range between 1.8V and 5.5V allowing them to be supplied from one of the step-down converters or directly from the Li-ion battery.

SY8631B operates over a wide input voltage range from 2.5V to 5.5V to optimize the device for 5V, 3.3V or Li-ion battery applications.

Evaluation Board

Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_SY8631BQCC

EVB File

The EVB_SY8631BQCC is used to evaluate integrated Power Management IC for applications powered by one Li-ion or Li-Polymer cell which require multiple power rails.

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12
QFN4x4-24	2022-05-20