1.25MHz, 600mA
Synchronous Step-Down
Regulator
CYT2806
Description
Features
The CYT2806 is a high efficiency monolithic
¾
¾
High Efficiency: Up to 96%
Very Low Quiescent Current: Only 20µA
synchronous buck regulator using a constant
frequency, voltage mode architecture. The device
is available in fixed output voltage of 1.8V and 1.5V
and adjustable output voltage. Supply current
during operation is only 20µA and drop to ≤1µA in
shutdown. The 2.5V to 5.5V input voltage range
During Operation
¾
¾
¾
¾
600mA Output Current
2.5V to 5V Input Voltage Range
1.25MHz Constant Frequency Operation
No Schottky Diode Required
makes the CYT2806 ideally suited for single Li-Ion ¾
Low Dropout Operation: 100% Duty Cycle
Shutdown Mode draws ≤ 1µA Supply Current
Excellent Line and Load Transient Response
Overtemperature Protection
battery-powered applications. 100% duty cycle
provides low dropout operation, extending battery
life in portable systems.
¾
¾
¾
¾
Available in SOT Package
Switching frequency is internally set at
1.25MHz, allowing the use of small surface mount
inductors and capacitors.
Application
The internal synchronous switch increases
efficiency and eliminates the need for an external
Schottky diode. The CYT2806 is available in low
profile SOT package.
¾
¾
¾
¾
¾
¾
Cellular Phone
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Pin Configuration
5 Lead SOT-23
Portable Instruments
Application Diagram
Preliminary and all contents are subject to change without prior notice
1
