Features
 Low RDS(ON) for internal switches (top/bottom)
120 mΩ/75 mΩ, 2.0 A
 4.5 ~ 28 V input voltage range
 High-efficiency synchronous-mode
 Internal soft-start limits the inrush current
 Overcurrent protection
 Thermal shutdown
 Green package:
TSOT23-6 is pin compatible
Applications
 Meters and PLC Modules
 Industrial Control
 Portable TV
Descriptions
The DIO54270 is a high-efficiency, high frequency
synchronous step-down DC-DC regulator IC
capable of delivering up to 2 A output currents.
The DIO54270 family operate over a wide input
voltage range from 4.5 V to 28 V and integrate
main switch and synchronous switch with very
low RDS(ON) to minimize the conduction loss.
The DIO54270 adopts the COT 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 500 kHz under heavy load conditions
to minimize the size of inductor and capacitor.