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SC1103

Semtech Corporation
Part Number SC1103
Manufacturer Semtech Corporation
Description Asynchronous Voltage Mode PWM Controller
Published Apr 8, 2005
Detailed Description POWER MANAGEMENT Description The SC1103 is a versatile, low-cost, voltage-mode PWM controller designed for 12V input DC/...
Datasheet PDF File SC1103 PDF File

SC1103
SC1103

Overview
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 components.
Internal level shift and drive circuitry eliminates the need for an expensive p-channel, high-side switch.
The small device footprint allows for compact circuit design.
SC1103 features include a temperature compensated voltage reference, triangle wave oscillator, current limit comparator, frequency shift over-current protection, and an internally compensated 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 200kHz, providing an optimum compromise between efficiency, external component size, and cost.
SC1103 Asynchronous Voltage Mode PWM Controller for 12V Input Fe...


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