RY9121 General Description：
The RY9121 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. 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 control operation provides very fast transient response and easy loop design as well as very tight output regulation.
The RY9121 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package.
RY9121 Features：
Wide 4.5V to 17V Operating Input Range
2A Continuous Output Current
500KHz Switching Frequency
ECOT Mode Control with Fast Transient Response
Built-in Over Current Limit
Built-in Over Voltage Protection
Force-PWM Mode
Internal Soft-Start
110mΩ/70mΩ Low RDS(ON) Internal Power MOSFETs
Output Adjustable from 0.6V
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
RY9121 Applications：
Digital Set-top Box (STB)
Tablet Personal Computer (Pad)
Flat-Panel Television and Monitor
Wi-Fi Router / AP
Digital Video Recorder (DVR)
Portable Media Player (PMP)
Cable Modem / XDSL
General Purposes
RY9121 Typical Application Circuit：
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RY9121 Pin Description：
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RY9121 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
|
T/R Qty
|
|
CDYLL |
70301121 |
RY9121 |
RY9121 ECOT Force-PWM Buck, 4.5-17V, 2A, 500KHz, VFB 0.6V, SOT23-6 |
SOT23-6 |
3000PCS |
Note (1): All RYCHIP parts are Pb-Free and adhere to the RoHS directive.
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