SC1103
SC1103 is Asynchronous Voltage Mode PWM Controller manufactured by SEMTECH.
POWER MANAGEMENT Description
The SC1103 is a versatile, low-cost, voltage-mode PWM controller designed for 12V input DC/DC power supply applications. A simple, fixed-voltage buck regulator can be implemented using the SC1103 with a minimum of external ponents. Internal level shift and drive circuitry eliminates the need for an expensive p-channel, high-side switch. The small device footprint allows for pact circuit design.
SC1103 Features include a temperature pensated voltage reference, triangle wave oscillator, current limit parator, frequency shift over-current protection, and an internally pensated error amplifier. Pulse by pulse current limiting is implemented by sensing the differential voltage across an external resistor, or an appropriately sized PC board trace.
The SC1103 operates at a fixed frequency of 200k Hz, providing an optimum promise between efficiency, external ponent size, and cost.
Asynchronous Voltage Mode PWM Controller for 12V...
