RY3410   5.5V 1.2A 1.5MHz Synchronous Step-Down Regulator
1、Features
? 2.5V to 5.5V Input Voltage Range
? 1.2A Continuous Output Current
? 1.5MHz Switching Frequency
? Built-in Short Protection
? Built-in Over Current Limit
? Built-in Over Voltage Protection
? PFM Mode for High Efficiency in Light Load
? Internal Soft-Start
? High Efficiency: Up to 96%
? Output Adjustable from 0.6V
? No Schottky Diode Required
? Over Temperature Protected
? Low Quiescent Current: 40μA
? Available in SOT23-5 package
? -40°C to +85°C Temperature Range
2、Applications
? Cellular and Smart Phones
? Wireless and DSL Modems
? PDAs
? Portable Instruments
? Digital Still and Video Cameras
? PC Cards
3、General Description
   The RY3410 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 RY3410 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 1.5MHz, allowing the use of small surface mount inductors and capacitors. Low output
voltages are easily supported with the 0.6V feedback reference voltage.
The RY3410 requires a minimal number of readily available, external components and is available in a space saving
SOT23-5 package
4、Website：www.baitaishengshi.com
5、Typical Application Circuit