SY21113E1ADC

High Efficiency, Fast Response, 3.0A, 18V Input Synchronous Step Down Regulator

SY21113E1ADC High Efficiency, Fast Response, 3.0A, 18V Input Synchronous Step Down Regulator Datasheet

Parameters
Features
Description

Part Number	SY21113E1ADC
Vin_min (V)	4.5
Vin_max (V)	18
Vo_min (V)	0.6
Io_max (A)	3
Vref Accuracy	±1.5%
Fsw (MHz)	0.5
Iq (uA)
Package	TSOT23-6
Protection Mode	Hic-cup SCP
Features / Special Function

Low R_DS(ON) for Internal Switches (Top/Bottom): 80mΩ/40mΩ
4.5-18V Input Voltage Range
3A Output Current Capability
500 kHz Switching Frequency Minimize the External Components
Stable with 10µF C_OUT and 2.2µH Inductor
Instant PWM Architecture to Achieve Fast Transient Responses
Internal Soft-start Limits the Inrush Current
Forced PWM Operation
Cycle-by-cycle Peak/Valley Current Limitation
Hic-cup Mode Output Short Circuit Protection
Thermal Shutdown with Auto Recovery
Output Auto Discharge Function
Compact Package: TSOT23-6

The SY21113E1 is a high efficiency, 500 kHz synchronous step-down DC/DC regulator capable of delivering up to 3A load current. It can operate over a wide input voltage range from 4.5V to 18V and integrate main switch and synchronous switch with very low R_DS(ON) to minimize the conduction loss.

The SY21113E1 adopts the instant PWM architecture to achieve fast transient responses for high step down applications. In addition, it operates at pseudo-constant frequency of 500 kHz to minimize the size of the inductor and the capacitor.