Product Details Supplier Info More products

Semtech’s new digital DC-DC converter is ideal for high-current distributed main power supply rails in embedded applications for networking, communications, industrial and office automation equipment.

The SC493 is claimed to address complex power management requirements by enabling users to digitally configure and interrogate the status of the controller via an I2C bus.

The new converter is the latest addition to the company’s Ecospeed converter platform.

The SC493 combines the flexibility and feature set of a digital converter with the ultra-fast transient response and high efficiency of Semtech’s patented adaptive on-time (AOT) controller architecture.

The I2C interface of the instrument can be used to fine-adjust the output voltage and to implement margining, as well as to program device functions including output enable/disable, switching frequency, power-on delay time, soft-start time, the power-save mode and ultrasonic power-save frequency.

The I2C status register bits can be used for diagnostics, including current limit, over-temperature, over-/under-voltage, brown-out and power-good.

The AOT topology of the SC493 helps designers meet demanding ‘green’ power requirements by efficiently managing both standby and full current demands.

Semtech’s AOT core provides conventional current mode, voltage mode and constant on-time control topologies with minimal trade-offs.

This architecture enables static and dynamic regulation and high efficiency across light to full power loads, while eliminating the need for external compensation components, providing a simple, space-saving and cost-effective power management solution.

The SC493 switching frequency is programmable from 250kHz to 1MHz, enabling power supply rails to be optimised for either conversion efficiency or solution size.

The device also incorporates Semtech’s proprietary Smartdrive technology: a two-step, high-side FET turn-on solution that reduces electromagnetic interference (EMI) in noise-sensitive applications and that provides strong FET gate drives capable of supporting output currents up to 25A.

The Ecospeed architecture allows the SC493 to work with ceramic input and output capacitors.

This, combined with the fact there are no external compensation components, optimises bill-of-material costs and reduces the time to design.

The SC493 is packaged in a low-profile, 20-pad, 3.0 x 3.0 x 0.6mm, lead-free, halogen-free MLPQ package and is available immediately in production quantities priced at USD1.06 (GBP0.72) each in 3,000-piece lots.

View full profile