40V , 600mA , Step-Down Converter SSP9451

Shanghai Siproin Microelectronics Co., Ltd

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The SSP9451 is a high frequency (1.8MHz) step-down switching regulator with integrated internal high-side high voltage power MOSFET. It provides single 0.6A(or less) highly efficient output with current mode control for fast loop response. The wide input range(4.2V to 40V) accommodates a variety of step-down applications under mobile environment input conditions.Low shutdown mode quiescent current of 1μA is suitable for battery-powered applications. High efficiency at light load condition is achieved by scaling down the switching frequency to reduce the switching and gate driving losses.The frequency folding technique helps prevent the inductance current from running out of control at startup. Hot shutdown provides reliable, fault tolerant operation.

Features

Output 0.6A peak current
230μA operating quiescent current
2 V to 40 V operating input range
500mΩ internal power MOSFET
8 MHz fixed switching frequency
Internally compensated
Stable with ceramic output capacitors
Internal soft-start
Precision current limit without current sensing resistor
>90% efficiency
Low shutdown mode current：<1μA
SOT23-6package

Application

High voltage power conversion
Automotive systems
Industrial power system
Distributed power system
Battery powered system

Technical Specifications

Item	Specifications	Remarks
Update Date	Shanghai Siproin Microelectronics Co., Ltd	2025
Lead time	within 30 days	Can be expedited
Material	See product manual	Request Inspection Report
Application	Applicable to multiple industries	Complies with standards
Keywords	Electronic component,Anologe IC,Power Management,Integrated circuit