RY3420 Datasheet | ChipSourceTek

Features - High Efficiency: Up to 96% - 2.5V to 5.5V Input Voltage Range - 1.2MHz Constant Frequency Operation - No Schottky Diode Required - Low Dropout Operation: 100% Duty Cycle - PFM Mode for High Efficiency in Light Load - Over Temperature Protected - Low Quiescent Current: 40μA - Short Circuit Protection - Inrush Current Limit and Soft Start - 2A Continuous Output Current - SOT23-5 package RY3420 Applications - Cellular and Smart Phones - Portable Instruments - Wireless and DSL Modems - PDAs - Digital Still and Video Cameras - PC Cards RY3420 General Description 技 k The RY3420 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 40u A and drops to 科 e <1u A in shutdown. The 2.3V to 6V input voltage range makes the RY3420 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. T PWM/PFM mode operation provides very low output ripple voltage for noise sensitive applications. 特 e 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. 源 rc The RY3420 is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version. C矽hip Sou RY3420 Typical Application Circuit TEL: +86-0755-27595155 27595165 FAX: +86-0755-27594792 WEB:Http://.Chip Source Tek. E-mail: Sales@Chip Source Tek. Tony.Wang@Chip Source Tek. RY3420 1.2MHz 2A Synchronous Step-Down Regulator RY3420 Absolute Maximum Ratings (Note 1) Input Supply Voltage ……… -0.3V to 6.0V EN, FB Voltages…… -0.3V to 6.0V SW Voltage……….… -0.3V to (Vin+0.3V) Peak SW Sink and Source Current 3A Operating Temperature Range ……… -40°C to +85°C Junction Temperature(Note2) ………………...…... 125°C Storage...