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Application Note: SA24403
High Efficiency Fast Response, 3.5A, 40V Input
Synchronous Step Down Regulator
General Description Features
The SA24403 develops a high efficiency synchronous Low RDS(ON) for Internal Switches (Top/Bottom) :
step-down DC/DC converter capable of delivering 115/80mΩ
3.5A load current. The SA24403 operates over a wide 4.2-40V Input Voltage Range
input voltage range from 4.2V to 40V and integrates Internal Compensation
main switch and synchronous switch with very low Internal 1ms Soft-start Limits the Inrush Current
RDS(ON) to minimize the conduction loss. Adjustable Switching Frequency Range: 300kHz to
2.2MHz
The SA24403 adopts peak current control scheme. The 3.5A Output Current Capability
switching frequency is adjustable from 300kHz to ±2% 0.6V Reference Over -40°C~125°C
2.2MHz using an external resistor. The device also
Cycle-by-cycle Peak Current Limitation
features ultra low quiescent operating to achieve high
Short Circuit Protection
efficiency under light load. And the internal soft-start
limits inrush current during power on. Thermal Shutdown and Auto Recovery
RoHS Compl
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