The RY3430 is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version. Supply current with no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makes the RY3430 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.PWM/PFM mode operation provides very low output ripple voltage for noise sensitive applications.
Switching frequency is internally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors.Low output voltages are easily supported with the 0.6V feedback reference voltage.
The RY3430 is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version.
RY3430 Features:
High Efficiency: Up to 96%
2.5V to 5.5V Input Voltage Range
1.2MHz Constant Frequency Operation
Up to 3.0A Current Output
No Schottky Diode Required
PFM Mode for High Efficiency in Light Load
Over temperature Protected
Low Quiescent Current: 40μA
Short Circuit Protection
Inrush Current Limit and Soft Start
Low Dropout Operation:100% Duty Cycle
SOT23-5 package
RY3430 Applications:
Cellular and Smart Phones
Wireless and DSL Modems
PDAs
Portable Instruments
Digital Still and Video Cameras
PC Cards
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