General Description
The RY81020 is a monolithic IC designed for step-down DC/DC converters, featuring low EMI, the ability to drive
2A continuous current, and excellent load and line regulation. The RY81020 can also operate at 98% duty cycle for
low dropout operation, and internal soft-start allows for low inrush currents, extending battery life in portable
systems. In terms of protection features, it features cycle-by-cycle peak current limiting, short-circuit protection,
thermal shutdown and undervoltage lockout.
The RY81020 is available in ESOP8 packages.
Features
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Wide input voltage Range: 4.5V~100V
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Adjustable Output Voltage from 0.8V to VIN
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Low RDS(ON) Switches 500mΩ
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420kHz Fixed Switching Frequency or
370-620kHz Adjustable Switching Frequency
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Duty Cycle up to 98%
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Short Circuit Protection
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Over Current Protection
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Internal Soft Startup
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Thermal Shutdown Protection
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Available in ESOP8 Packages
Applications
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LCD Monitor and LCD TV
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Battery-powered Equipment
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Entertainment Devices
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Digital Home Appliances: Digital TVs
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ADSL Modem Portable Instruments
Typical Application Circuit
