Date: 13/06/2012

Current-mode and voltage-mode options in a single DC-DC switching controller from ADI

Analog Devices, Inc. (ADI) has introduced the ADP1853 wide-input-range, synchronous, step-down DC-to-DC controller with voltage tracking and advanced clock synchronization capability. The ADP1853 can be configured as a voltage-mode controller with input feed-forward or as a current-mode controller, depending on the application and customer preference.

The ADP1853 has clock-out and synchronization input to ensure 180-degree phase-shifted synchronization, eliminating troublesome "beat" frequencies and reducing system input capacitance when multiple devices are used. The controller's tracking capability enables controlled start-up.

The ADP1853 is designed for high-efficiency, high-current, fast-transient, point-of-load applications in communications networking, industrial, medical, and consumer applications.

In current-mode control, the device's architecture detects the current during the off period to improve noise immunity using the on-resistance of the low-side FET-or a series sense resistor for higher accuracy.

The module can be configured for voltage-mode control with minor adjustments to external resistor settings using input-line feed-forward for line rejection. The device has a selectable pulse-skip mode to increase efficiency during light load operation.

The ADP1853 is accompanied by ADI's online ADIsimPower tools for faster design.
Product Full production Temperature range Price each per 1,000 Packaging
ADP1853ACPZ-R7 Now –40°C to +125°C $1.20 20-lead LFCSP
ADP1853-EVALZ Jun-12 -- $60.00 --
Data sheet: http://www.analog.com/ADP1853