RY8401 Sync Step-Down Regulator

RY8401  Standoff 42V 0.6A 800KHz Sync Step-Down Regulator
1、Features
• Wide 4V to 38V Operating Input Range
• Standoff Voltage: 42V
• 600mA Continuous Output Current
• 800KHz Switching Frequency
• Short Protection with Foldback-Mode
• Built-in Over Current Limit
• Built-in Over Voltage Protection
• Support PSM Mode
• Internal Soft-Start
• 500mΩ/300mΩ Low RDS(ON) Internal Power
MOSFETs
• Output Adjustable from 0.8V
• No Schottky Diode Required
• Integrated internal compensation
• Thermal Shutdown
• Available in SOT23-6 Package
• -40°C to +85°C Temperature Range
2、Applications
• Battery-Powered Equipment
• Portable Media Players
• Industrial Distributed Power Applications
• Portable Hand-Held Instruments
3、General Description
   The RY8401 device is high-efficiency, synchronous step-down DC/DC regulators. With a wide input range, it is suitable for a wide range of applications, such as power conditioning from unregulated sources. It features a low RDSON (500mΩ/300mΩ typical) internal switch for maximum efficiency (92% typical). Supports PSM mode, the operating frequency is fixed at 800kHz, allowing the use of small external components while still being able to have
low output voltage ripple. With OVP function, the IC can stand off input voltage as high as 42V. The RY8401supports 600mA continuous output current, and it has a 0.8V nominal feedback voltage.
   Additional features include: thermal shutdown, VIN undervoltage lockout, and gate drive undervoltage lockout. The RY8401 is available in a low-profile SOT23-6 package.
4、Website：www.baitaishengshi.com
5、Typical Application Circuit