SY6402QVC

High Efficiency Bi-directional DC-DC Regulator with High Current Overvoltage Protection Switch

SY6402QVC High Efficiency Bi-directional DC-DC Regulator with High Current Overvoltage Protection Switch Datasheet

Parameters
Features
Description

Part number	SY6402QVC
Vin (min) (V)	2.7
Vin (max) (V)	16
Channel(#)	1
Application	SSD
Features	Input-side current limit switch Bi-directional DC-DC regulator with disconnect switch: boost charging mode and buck discharging mode
Package	QFN3×4-19

• Low RDS(ON) for Internal Switches

- Input Reverse Blocking Switch: 50 mΩ

- High-Side and Low-Side Switches of Bi-directional DC-DC Regulator: 60 mΩ /60 mΩ

- Disconnect Switch: 30 mΩ

• 2.7V-16V Input Voltage Range

• 36V Storage Voltage Rating

• Programmable Input Current Limit from 1A to 5A

• Selectable Over Voltage Protection: 3.3V, 5.0V, and 12V

• Reverse Blocking at Input Side

• Programmable Soft-Start Time

• Integrated High-Efficiency Bi-directional DC-DC Regulator: Boost Charging Mode and Buck Discharging Mode Auto-alternating with Programmable System Voltage

• Quasi-Fixed Frequency Constant OFF Time Control for Stable Operation: 500kHz

• Programmable Boost Charging Current

• Programmable Storage Voltage

• Power Path Management

• Short-Circuit Protection at Energy Storage Side

• Enable Control

• RoHS Compliant and Halogen Free

• Compact Package: QFN3×4-19

The SY6402 is designed to achieve energy storage and release management for the applications of data backup in Solid-State Driver and other backup power supplies. The integrated bi-directional Dc-Dc regulator transfers the energy between the system side and the energy storage side with high efficiency. The quasi-fixed frequency constant off time control is employed to achieve stable operation and fast dynamic response. Besides, a reverse blocking switch is integrated at the input side to prevent from energy leaking when the input power source is removed or inserted with inverse polarity. The programmable input current limit cooperates with the bi-directional Dc-Dc regulator to achieve power path management for better dynamic load response at the system side. Three different input voltage OVP thresholds are selectable for the applications with different kind of input power source.

The SY6402 along with QFN3×4-19 package provides compact PCB layout.

Evaluation Board

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

EVB_SY6402QVC

EVB File

The EVB_SY6402QVC is intended for evaluating high efficiency Bi-directional DC-DC regulator with high current overvoltage protection switch.

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12