Buck

Overview

High efficiency&high power density.

Silergy's high-efficiency DC / DC step-down switching regulators have a wide range of input voltage ranges and output current capabilities, and there is always a step-down regulator that can meet your system requirements.

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Product Type	In Production Pre-sample NRND
Application Type	Consumer Industrial Automotive
Vin(min)	≥	Vo(max)	≤
Vin(max)	≤	Io(max)	≤
Iq(typ)	≤

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Part number	Channel!(#)	Vin (min) !(V)	Vin (max) !(V)	Switching frequency (min)!(kHz)	Switching frequency (max)!(kHz)	Vout (min) !(V)	Vout (max) !(V)	Iout (max) !(A)	Vref accuracy! (±%)	Vout accuracy!(±%)	Control mode	Duty cycle (max)!(%)	Operation mode	Iq (typ) !(uA)	Features	Package	Datasheet	Online Simulation
Matching parts：193						5.15 5.1 3.338 3.3 3.2 2.5 1.8 1.5 1.225 1.2 1 0.95*VIN 0.9 0.81 0.8 0.765 0.7625 0.7125 0.6 0.4 0.1-1	? 37.6 36 34.2 33.84 24 12.5 12 9.5 9.2 6 5.95 5.5 5.15 5.1 5 4.4 3.4 3.338 3.3 2.5 1.8 1.55 1.5 1.3875 1.2 1		3(over temperature) 3 2(over temperature) 2 1.5(over temperature) 1.5 1.2 1(over temperature) 1	2 1.5 1(over temperature) 1	Peak current control Constant on time Clock+Ipeak COT+Ripple COT+Ivalley COT OFF+lpeak COT OFF+Ipeak	100% 100 99.9 98 95 94 90 88 85 84 80 75 70 65	PFM/FCCM PFM FCCM/PFM Selectable FCCM Auto PFM		Stackable PMBus Soft start Power good I2C Output discharge programmable current limit Latch-off SCP Programmable current limit Latch-off SCP Hiccup SCP Soft start LDO output LDO output programmable current limit Hiccup SCP Programmable current limit Asynchronous Pre-bias startup Output discharge Buffered reference 0.5*Vbuck+10mV souring/sinking LDO output Fixed 0.61V sourcing/sinking LDO Asynchronous I2C Interleave operation Enable Fixed soft-start Low Iq UVP with hiccup Low ISD Cycle by cycle overcurrent protection Pre-bias startup Auto-discharge Wettable flanks package OVP External bias input Adjustable switching frequency Spread spectrum Frequency synchronization 100% duty cycle Forced PWM Adjustable soft-start EN ON/OFF control with accurate threshold Power good Auto-Discharge Fixed soft-start Low Iq Thermal shutdown SCP with hiccup 99.9% duty cycle Low shutdown current Spread spectrum Cycle by cycle current limit Precise Ref accuracy PFM selectable in light load Internal compenstation Smooth prebias start up Synchronization to External Clock Support 42V Load Dump Support 3V Cold Crank Auto-Discharge 100% Dropout Power Good Indicator	TSOT23-8 TSOT23-6 SOT583 SOT563 SOT23-6 SOT23-5 SO8E QFN3×4-21 QFN3×4-19 QFN3×4-14 QFN3×4-13 QFN3×3-20 QFN3×3-16 QFN3×3-12 QFN3×3-10 QFN3.5×4-20 QFN3.5×4-14 QFN3.5×3.5-20 QFN3.5×3.5-18 QFN2×3-9 QFN2×3-14 QFN2×2-12 QFN2×2-10 QFN2×1.5-8 QFN2x2-12 QFN2.5×2.5-16 QFN1.5×1.5-7 LGA6×6-42 DFN4×4-8 DFN3×3-12 DFN3×3-10 DFN2×2-8 DFN2×2-7 DFN2×2-6 DFN2×1.5-8 DFN1.5×1.5-6 DFN1.4×1.8-6 DFN1.45×1-6 CSP1.56×1.96-20	Y N

SY26024DQD	1	2.5	5.5	2200	2200	0.6	5	4	1(over temperature)		COT+Ripple	100	Auto PFM	21	Power good,Output discharge	DFN1.5×1.5-6	Y	Consumer
SY26023DQD	1	2.5	5.5	2200	2200	0.6	5	3	1(over temperature)		COT+Ripple	100	Auto PFM	21	Power good,Output discharge	DFN1.5×1.5-6	N	Consumer
SY20277QQC	1	2.7	5.5	1500	1500	0.6	1.5	12		1	COT+Ripple	70	Auto PFM	95	Output discharge, I2C	QFN3×3-12	N	Consumer
SY20118ADFC	1	2.5	5.5	1000	1000	0.6	5	4	1.5		COT OFF+Ipeak	100	Auto PFM	55	Power good,Output discharge	DFN2×2-8	Y	Consumer
SY81153CART	1	4	18	1200	1200	0.6	5.5	3	1(over temperature)		COT+Ripple	75	Auto PFM	160		SOT563	N	Consumer
SY81105EADT	1	4.5	18	400	400	0.6	9.5	5	1		COT+Ripple	75	FCCM			TSOT23-6	N	Consumer
SY81105ADT	1	4.5	18	400	400	0.6	9.5	5	1		COT+Ripple	75	Auto PFM	200		TSOT23-6	N	Consumer
SY81104EADT	1	4.5	18	400	400	0.6	5.5	4	1		COT+Ripple	75	FCCM			TSOT23-6	N	Consumer
SY81103EABT	1	4.5	18	500	500	0.6	9.2	3	1.5		COT+Ripple	75	FCCM			SOT23-6	N	Consumer
SY81103CABT	1	4.5	18	1200	1200	0.6	9.2	3	1.5		COT+Ripple	75	Auto PFM	200		SOT23-6	N	Consumer
SY81103BABT	1	4.5	18	1200	1200	0.6	9.2	3	1.5		COT+Ripple	75	FCCM			SOT23-6	N	Consumer
SY81102CABT	1	4.5	18	1200	1200	0.6	9.2	2	1.5		COT+Ripple	75	Auto PFM	200		SOT23-6	N	Consumer
SY81102BABT	1	4.5	18	1400	1400	0.6	9.2	2	1.5		COT+Ripple	75	FCCM			SOT23-6	N	Consumer
SY81058TABT	1	4.5	18	500	500	0.765	9.2	3	1.5		COT+Ripple	75	Auto PFM	200		SOT23-6	N	Consumer
SY81058EABT	1	4.5	18	500	500	0.6	9.2	3	1.5		COT+Ripple	75	FCCM			SOT23-6	N	Consumer
SY81057TABT	1	4.5	18	500	500	0.765	9.2	2	1.5		COT+Ripple	75	Auto PFM	200		SOT23-6	N	Consumer
SY80033LDFD	1	2.5	5.5	1000	1000	0.6	5	3	1.5		COT OFF+Ipeak	100	Auto PFM	55	Power good,Output discharge,Latch-off SCP	DFN2×2-8	N	Consumer
SY80033DFD	1	2.5	5.5	1000	1000	0.6	5	3	1.5		COT OFF+Ipeak	100	Auto PFM	55	Power good,Output discharge	DFN2×2-8	N	Consumer
SY2A26066WYQ	1	3	7	660	2200	0.6	5.95	6	1		Constant on time	85	PFM/FCCM	850	Enable,Power good,Auto-discharge,Adjustable soft-start,UVP with hiccup,Low ISD,Adjustable switching frequency,Cycle by cycle overcurrent protection,Forced PWM,Pre-bias startup	QFN2×3-14	N	Automotive
SY2A23006XHQ	1	2.8	5.5	1800	3000	0.6	5.5	6	1.2		Peak current control	100	PFM/FCCM	38	Enable,Power good,Auto-discharge,Adjustable soft-start,Low Iq,Wettable flanks package,UVP with hiccup,100% duty cycle,Low ISD,Adjustable switching frequency,Spread spectrum,Cycle by cycle overcurrent protection,Forced PWM,Frequency synchronization,Pre-bias startup	QFN2×3-9	N	Automotive

Selection Guide

Title	Date
Automotive_Solutions_Q1_2026	2026-03-06
Silergy_Catalog_Q1_2026	2026-02-09