SI LS97OD 1A Step Down Switching Regulator Datasheet

Category: Electronics, Other Semiconductors, STMicroelectronics Inc

Overview of SI LS97OD Step Down Switching Regulator

The SI LS97OD datasheet describes a robust step down monolithic power switching regulator that is capable of delivering up to 1A of output current. It operates within a wide input voltage range of 4.4V to 36V, with an adjustable output voltage from 1.2V to 35V. The device features an accurate 3.3V (+2%) reference voltage and can operate with a low dropout, enabling 100% duty cycle in certain conditions.

Main Features

Key features include:

Fixed internal switching frequency of 250KHz.
Voltage feedforward enhancing performance across different input levels.
Zero load current capability for efficient operation at no load.
Internal current limiting and thermal shutdown for safety.
An inhibition function to reduce current consumption when not in use.
Synchronization capabilities for system-wide power coordination.
Protection against feedback disconnection, preventing potential damage.

Applications

This switching regulator is suitable for a range of consumer electronics, networking devices, computer peripherals, and industrial equipment. Its versatile nature makes it ideal for TVs, car radios, DC-DC modules, optical storage units, and DC-DC converters among others.

Test Application Circuit and Package Information

The datasheet provides a detailed test application circuit that highlights the external components needed for deployment alongside the L5970D. The regulator is available in an SO8 package, which is a common form factor for surface-mounted devices.

Additional Datasheet Contents

Beyond the first two pages, the datasheet includes:

Pin settings and descriptions.
Maximum ratings and thermal data for safe operation.
Detailed electrical characteristics for power system designers.
Typical performance curves and application ideas for ease of integration.
Package mechanical data, order codes, and revision history.

Overall, the SI LS97OD regulator’s efficiency and safety features, combined with its wide operating range, make it a reliable choice for various applications, as detailed in the October 2007, Revision 16 of its datasheet.