RY3430 General Description:

    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

RY3430 Typical Application Circuit:

RY3430 Pin Description:

RY3430 Order Information:

Part No.	Model	Description	Package	MOQ
70301007	RY3430	RY3430 Buck, 2.5-5.5V, 3A, 1.2MHz, VFB 0.6V, SOT23-5	SOT23-5	3000PCS

RY3430 Functional Block Diagram:

RY3430 Package Description:

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