EVB_RT7285CGJ6: 1.2V @ 1.5A, 4.3 ~ 18Vin


The RT7285C is a synchronous step-down converter with Advanced Constant On-Time (ACOT) mode control. The ACOT provides a very fast transient response with few external components. The low impedance internal MOSFET supports high efficiency operation with wide input voltage range from 4.3V to 18V. The proprietary circuit of the RT7285C enables to support all ceramic capacitors. The output voltage can be adjusted between 0.6V and 8V.

The RT7285C also provides output under voltage protection and thermal shutdown protection. The low current (<4µA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7285C is available in TSOT-23-6 package.

Product Feature

  • ±1.5% High Accuracy Feedback Voltage

  • Integrated N-MOSFET Switches

  • ACOTTM mode control

  • Output Adjustable from 0.6V to 8V

  • Up to 95% Efficiency

  • Fast Transient Response


Manufacturer Richtek USA Inc.
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number EVB_RT7285CGJ6-ND
Eval Board Supplier Richtek USA Inc.
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Output Voltage: Factory Set 1.2 V
Current Out 1.5 A
Voltage In 4.3 ~ 18 V
Efficiency @ Conditions >90%, 18V in, 5V @ 0.3 ~ 1.5 A
>90%, 15V in, 5V @ 0.3 ~ 1.5 A
>90%, 12V in, 5V @ 0.2 ~ 1.5 A
>85%, 9V in, 1.2V @ 150 ~ 900 mA
>85%, 5V in, 1.2V @ 100 ~ 900 mA
Voltage Out Range 0.6 ~ 8 V
Features Current Limit (Adj. or Fixed)
Shutdown, Enable, Standby
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 500 kHz
Standby Current [Typical] - Not Given
Quiescent Current [Typical] 500 µA
Component Count + Extras 12 + 17
Internal Switch Yes
Design Author Richtek USA Inc.
Application / Target Market Computer Peripherals
FPGA / DSP / Processors
Industrial Power
LCD TV / Monitor
Point of Load (PoL)
White Goods
Standby Current [Maximum] 4 µA
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part RT7285C

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