SY21275DBC (SY7205ADBC)

High Performance Boost Regulator for UHD TV Display

SY21275DBC High Performance Boost Regulator for UHD TV Display Datasheet

Parameters
Features
Description

Part number	SY21275DBC
Vin (min) (V)	8.6
Vin (max) (V)	15.9
Current limit (A)	4.5
Switching frequency (min)(kHz)	500
Switching frequency (max)(kHz)	500
Vout (min) (V)	8.6
Vout (max) (V)	16
Vref accuracy (±%)	1.5
Vout accuracy(±%)
Duty cycle (max)(%)	90
Iq (typ) (uA)	120
Features	OVP
Package	DFN3×3-10
Operating temperature range(°C)	-40 to 125
Functional safety category

Wide 8.6V–15.9V Input Voltage Range
Low RDS(ON) for N-channel MOSFET: 75mΩ (typical)
95% Typical Efficiency
Feedback Reference Voltage: 1.25V ±1.5%
500kHz Fixed Switching Frequency
Pulse Skipping Mode at Light Load
Adjustable Soft-Start Limits Inrush Current
EN ON/OFF Control
Overvoltage Protection
Cycle-by-Cycle Current-Limiting Protection
Input UVLO
Thermal Shutdown with Automatic Recovery
Compact DFN3×3-10 Packag

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Evaluation Board

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

EVB_SY21275DBC_1

The EVB_SY21275DBC_1 is intended for evaluating a high efficiency, current-mode control Boost regulator SY21275 which is targeted for UHD TV display.

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12
DFN3x3-10	2022-05-20

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