SY21113C1ADC

High Efficiency, 1.2MHz, 3.0A, 18V Input Synchronous Step Down Regulator

SY21113C1ADC High Efficiency, 1.2MHz, 3.0A, 18V Input Synchronous Step Down Regulator Datasheet

Parameters
Features
Description

Part Number	SY21113C1ADC
Vin_min (V)	4.2
Vin_max (V)	18
Vo_min (V)	0.6
Io_max (A)	3
Vref Accuracy	±1.5%
Fsw (MHz)	1.2
Iq (uA)	270
Package	TSOT23-6
Protection Mode	Hic-cup SCP
Features / Special Function	Auto-Discharge

Low R_DS(ON) for Internal Switches (Top/Bottom): 80mΩ/40mΩ
4.2-18V Input Voltage Range
3A Output Current Capability
1.2MHz Switching Frequency Minimize the External Components
Stable with 10µF C_OUT and 0.68µH Inductor
Instant PWM Architecture to Achieve Fast Transient Responses
Internal Soft-start Limits the Inrush Current
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 SY21113C1 is a high efficiency, 1.2MHz synchronous step-down DC/DC regulator capable of delivering up to 3A load current. It can operate over a wide input voltage range from 4.2V to 18V and integrate main switch and synchronous switch with very low R_DS(ON) to minimize the conduction loss.

The SY21113C1 adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 1.2MHz to minimize the size of the inductor and the capacitor.