RY9420 General Description:
The RY9420 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. RY9420 provides different frequency and FB versions, which can be selected according to different applications. It offers a very compact solution to provide a 2A continuous output current over a wide input supply range, with excellent load and line regulation. ECOT PSM control operation provides very fast transient response and easy loop design as well as very tight output regulation.
The RY9420 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package.
RY9420 Features:
Wide 4.5V to 36V Operating Input Range
2A Continuous Output Current
500K/1MHz Switching Frequency
ECOT Mode Control with Fast Transient Response
Built-in Over Current Limit
Built-in Over Voltage Protection
PSM Mode for High Efficiency in Light Load
Internal Soft-Start
100mΩ/50mΩ Low RDS(ON) Internal Power MOSFETs
Output Adjustable from 0.6/0.8/0.765V
No Schottky Diode Required
Short Protection with Hiccup-Mode
Integrated internal compensation
Thermal Shutdown
Available in SOT23-6 Package
-40°C to +85°C Temperature Range
RY9420 Applications:
Automotive Systems
Network Terminal Equipment
Security Monitoring Camera
Printer Systems
Industrial Power Systems
Distributed Power Systems
RY9420 Typical Application Circuit:
RY9420 Pin Description:
RY9420 Order Information (1):
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Marking
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Part No.
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Model
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Description
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Package
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T/R Qty
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hAYLL
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70301721
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RY9420AT6
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RY9420AT6 ECOT PSM Buck, 4.5-36V,2A,500KHz,VFB 0.6V, SOT23-6
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SOT23-6
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3000PCS
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hBYLL
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70301722
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RY9420BT6
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RY9420BT6 ECOT PSM Buck, 4.5-36V,2A,500KHz,VFB 0.8V, SOT23-6
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SOT23-6
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3000PCS
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hCYLL
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70301723
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RY9420CT6
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RY9420CT6 ECOT PSM Buck, 4.5-36V,2A,500KHz,VFB 0.765V,SOT23-6
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SOT23-6
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3000PCS
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hCYLL
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70301724
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RY9420HAT6
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RY9420HAT6 ECOT PSM Buck, 4.5-36V, 2A, 1MHz, VFB 0.6V, SOT23-6
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SOT23-6
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3000PCS
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hFYLL
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70301725
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RY9420HBT6
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RY9420HBT6 ECOT PSM Buck, 4.5-36V, 2A, 1MHz, VFB 0.8V, SOT23-6
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SOT23-6
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3000PCS
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hEYLL
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70301726
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RY9420HCT6
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RY9420HCT6 ECOT PSM Buck, 4.5-36V, 2A, 1MHz, VFB 0.765V, SOT23-6
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SOT23-6
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3000PCS
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RY9420 Functional Block Diagram:
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