SC8721数据手册（英文版）
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SC8721 DATASHEET DRAFT
SOUTHCHIP SEMICONDUCTOR SOUTHCHIP CONFIDENTIAL, SUBJECT TO CHANGE
Copyright © 2019, Southchip Semiconductor Technology (Shanghai) Co., Ltd. 1
SC8721 High Efficiency, Synchronous, Buck-Boost Converter
with Four Integrated MOSFET
1 Descriptions
SC8721 is a synchronous 4-switch buck-boost converter
with four integrated switches. It is able to effectively output
voltage no matter it is higher, lower or equal to the input
voltage.
SC8721 supports very wide input and output voltage range.
It can support applications from 2.7V to 22V input range and
2.7V to 22V output range. Through its I2C interface, user
can program the output voltage and output current limit and
switching frequency. VINREG voltage can be adjusted by
external resistor.
SC8721 employs current-mode control and supports output
current limit, dynamic output voltage adjustment, internal
current limit, output short protection and over temperature
protections to ensure safety under different abnormal
conditions.
The IC is in a 21 pin 4x4 QFN package.
2 Features
• High Efficiency Buck-Boost Conversion
• Integrated Switches, 10 mΩ for Q1/4, 20 mΩ for Q2/3
• Wide VIN Range: 2.7 V to 22 V, 25V sustainable
• Wide VOUT Range: 2.7 V to 22 V, 25V sustainable
• Dynamic Output Voltage Control
• Adjustable Switching Frequency
• Output Voltage Cable Drop Compensation
• I2C Programmable Output Voltage
• I2C Programmable Output Current Limit
• Output Current Monitor
• Under Voltage Protection, Over Voltage Protection,
Over Current Protection
• Short Protection
• Thermal Shutdown Protection
• QFN-21 4 x 4 Package
3 Applications
• USB Power Delivery
• Wall Adapter
• Type C Hub
• Industry Power Supplies
4 Device Information
Part Number
Package
Dimension
SC8721QFER
21 pin QFN
4.0mm x 4.0mm x 0.75mm
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