SY87004WUS

5.5V, High Efficiency, Synchronous Boost Regulator with Bypass Mode

SY87004WUS 5.5V, High Efficiency, Synchronous Boost Regulator with Bypass Mode Datasheet

Parameters
Features
Description

Part number	SY87004WUS
Vin (min) (V)	1.9
Vin (max) (V)	5.5
Current limit (A)
Switching frequency (min)(kHz)	2100
Switching frequency (max)(kHz)	2100
Vout (min) (V)	2.85
Vout (max) (V)	5.5
Vref accuracy (±%)	1.5
Vout accuracy(±%)
Duty cycle (max)(%)	66
Iq (typ) (uA)	3
Features	Bypass mode,I2C,PFM/FCCM
Package	CSP1.65×1.65-16
Operating temperature range(°C)	-40 to 125
Functional safety category

Input Voltage Range: 1.9V to 5.5V
Program Output Range: 2.85V to 5.5V
Maximum Bypass Continuous Load Current :6A
Up to 95% Efficiency
Supports 0.9V signaling for SCL/SDA/EN Pins
Programmable Valley Inductor Current Limit and Output Voltage
I²C Configurable Auto Bypass Operation And Forced Bypass Mode
I²C configurable FCCM and PFM Modes
Low Operating Quiescent Current
Shutdown Current 0.1 µA (Typ.)
Load Disconnect During Shutdown
Compact Package CSP1.65×1.65-16

The SY87004 is a high efficiency, synchronous boost converter with bypass mode. The device is designed to operate in bypass mode by providing a low resistance path between the output and input when the input voltage is higher than the target voltage. It transition automatically into boost mode when the input voltage is lower than the desired output.

The SY87004 operates over a wide input voltage range from 1.9V to 5.5V and supports up to 6A maximum load current in bypass mode.

Overtemperature, overcurrent, as well as output undervoltage and input overvoltage protections are provided reliable operation.

The device operation and parameters can be configured using the I²C bus.

Evaluation Board

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

EVB_SY87004WUS

EVB File

The EVB_SY87004WUS is intended for evaluating the high efficiency, synchronous, adaptive constant on time control, step-up boost regulator.

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12

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