Power controller

The ADP1864 is Analog Devices’ first constant frequency, current-mode, step-down DC/DC controller in a TSOT (thin-small-outline-transistor package).

The device is suitable for use in of 5A distributed power systems – including set-top boxes, wireless base stations and medical instrumentation.

The device’s 14V input range means that it can be used in 12V power-supply wall bricks or systems requiring more than 10V input voltages.

Using Analog Devices’ in- package trim techniques, the company claims that the device’s on-board reference accuracy is three times better than the closest competing devices, reducing the overall system regulation error budget to five percent over temperature. The company also says that the load line regulation of 1mV/A is twice that of competing devices.

The ADP1864’s additional features include internal soft-start, short-circuit protection, output over-voltage protection, input under-voltage protection, and programmable current limit. Current-mode control provides fast and stable load transient performance, while the 580 kHz operating frequency reduces the size of the on-board inductor required, freeing up board space.

Available in full production quantities, the ADP1864 is housed in a 6-lead TSOT and priced at $1.05 in 1,000-unit quantities. The ADP1864 is specified over the extended industrial temperature range (–40 degrees C to +85 degrees C).