[Shenzhen Huazhimei Semiconductor Co., Ltd]

Overview:
HM2451 is a high-frequency (1.8MHz) step-down type with integrated high-side high-voltage power MOSFET.
Switching regulator. Provide a single channel maximum 0.6A high-efficiency output, and achieve a fast loop with current mode control response.
Wide range of input voltage (5 V to 40 V) can realize various step-down power supplies under mobile environment input conditions Transformation application. The 1uA shutdown quiescent current is suitable for battery-powered applications.
Under light load conditions, reduce the switching and gate drive losses by reducing the switching frequency, and achieve high Efficient power conversion.
The frequency fold technology helps prevent the inductor current from losing control at startup. Thermal shutdown provides reliable, fault-tolerant operation.
The circuit package is SOT23-6L.

FEATUREs
• 230uA working quiescent current
• 5 V to 40 V wide operating voltage range
• 500mΩ internal power MOSFET
• 1.8 MHz fixed switching frequency
• Internal compensation
• Ceramic output capacitor voltage regulation
• Internal soft start
• Precise current limit without sampling resistor
• Maximum efficiency up to 90%
• Low shutdown mode current: <1uA
• 6-pin SOT23 package

APPLICATIONs
• High voltage power conversion
• Automotive System
• Industrial Power System
• Distributed power system
• Battery powered system