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SC1103 - Asynchronous Voltage Mode PWM Controller

General 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.

Key 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 Asynch.

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Datasheet Details

Part number SC1103
Manufacturer SEMTECH
File Size 195.90 KB
Description Asynchronous Voltage Mode PWM Controller
Datasheet download datasheet SC1103 Datasheet

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Other Datasheets by SEMTECH

Part Number Description
SC1101 Asynchronous Voltage Mode PWM Controller
SC1102 Synchronous Voltage Mode Controller
SC1102A Synchronous Voltage Mode Controller
SC1104A (SC1104A/B) Synchronous Voltage Mode PWM Controller
SC1104B (SC1104A/B) Synchronous Voltage Mode PWM Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.