SY20018IAAC

High Efficiency, 1.5MHz, 1A Buck

SY20018IAAC High Efficiency, 1.5MHz, 1A Buck Datasheet

Parameters
Features
Description

Part Number	SY20018IAAC
Vin_min (V)	2.5
Vin_max (V)	5.5
Io_max (A)	1
Channels
Vo_min (V)	0.6
Fsw (MHz)	1.5
Vref (V)
Vref Accuracy	±1.5%
Iq (uA)	50
Rdson1	260
Rdson2	160
Soft Start	0.7
Package	SOT23-5
Topology
Protection Mode	Hic-cup SCP
Features / Special Function	100% Dropout Operation
Temp Range

2.5V to 5.5V Input Voltage Range
50μA Low Quiescent Current
Low RDS(ON) for Internal Switches (Top/Bottom) 260mΩ /160mΩ
High Switching Frequency 1.5MHz Minimizes the External Components
Internal Soft-start Limits the Inrush Current
100% Dropout Operation
Reliable Short Circuit Protection
Output Auto Discharge Function
RoHS Compliant and Halogen Free
Compact Package: SOT23-5

The SY20018I high-efficiency 1.5MHz synchronous step-down DC/DC regulator operates over a wide input voltage range of 2.5V to 5.5V, and can deliver an output current up to 1A with a low quiescent current of 50µA. It integrates a main switch and a synchronous switch with very low R_DS(ON) to minimize conduction loss. The 1.5MHz switching frequency allows for low output-voltage ripple, as well as small external inductor and capacitor values.

The SY20018I is highly integrated, so only the input and output capacitors, inductor, and feedback resistors need to be selected for the targeted application specifications.

The SY20018I is available in a compact SOT23-5 package.