Features
 Low RDS(ON) or internal switches (top/bottom)
120 mΩ/75 mΩ, 2.0 A
 4.5 ~ 30 V input voltage range
 High-efficiency, synchronous-mode
 Internal soft-start limits the inrush current
 Over current protection
 Thermal shutdown
 Green package:
TSOT23-6 is pin compatible
Applications
 Portable navigation devices
 Set top boxes
 Portable TVs
 LCD TVs
Descriptions
The DIU6921 is a high-efficiency, high-frequency
synchronous step-down DC-DC regulator IC
capable of delivering up to 2 A output currents.
The DIU6921 operates over a wide input voltage
range from 4.5 V to 30 V and integrates the main
switch and synchronous switch with very low
RDS(ON) to minimize the conduction loss.
The DIU6921 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 a
pseudo-constant frequency of 700 kHz under
heavy load conditions to minimize the size of the
inductor and capacitor.