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Step-down DCDC Controller (Middle voltage)

These products are middle voltage step-down DCDC controllers with an external output transistor.

Product Name Control Input Voltage Range Output Voltage Range Output Voltage Accuracy *1 Switching Frequency Output Tr. Output Current Protection Circuit Other Features Package Datasheet
R1223 PWM,
PWM/VFM Auto Switching
2.3V to 13.2V 1.5V to 5.0V ±2% 300kHz,
500kHz
External Depends on external MOSFET Latch,
Reset
Soft-Start SOT-23-5 Consumer
R1224 PWM,
PWM/VFM Auto Switching
2.3V to 18.5V 1.2V to 6.0V ±2% 180kHz,
300kHz,
500kHz
External Depends on external MOSFET Reset Soft-Start
UVLO
SOT-23-5 Consumer
1.0V to VIN,
Ext. Adjustable
R1225 PWM,
PWM/VFM Auto Switching
2.3V to 18.5V 1.2V to 6.0V ±2% 180kHz,
300kHz,
500kHz
External Depends on external MOSFET Latch Soft-Start
UVLO
SOT-23-6W Consumer
  • *1For the externally adjustable output voltage type, this is a feedback voltage accuracy.

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