Simple solution for powering set-top boxes

Edited by the Electronicstalk editorial team Jul 19, 2001

National Semiconductor reckons its new PWM inverting switching regulator provides the smallest, lowest-noise and easiest-to-use power solution for the tuner voltage in set-top boxes.

National Semiconductor reckons its new PWM inverting switching regulator provides the smallest, lowest-noise and easiest-to-use power solution for the tuner voltage in set-top boxes.

Capable of supplying -5V from a 5 or 12V input, the LM2611 delivers the needed power for STB tuner and LCD display designs or other voltage inverter requirements.

Its 1.4MHz oscillator permits the use of smaller external components while the Cuk topology reduces peak current and the external component count.

National's LM2611 operates from inputs of 2.7 to 14V and is capable of producing a negative output voltage of up to -(36V-Vin).

With its low 0.5ohm switch, the LM2611 produces higher efficiency and packs more power into a smaller area.

Features like internal compensation, cycle-by-cycle current limit and low noise make the LM2611 an exceptionally easy solution to use.

The LM2611 is ideal for creating the negative bias for active matrix displays or CCDs in digital cameras or creating -5V for the tuners in set-top boxes and cable modems.

It also provides the best MR amplifiers power solution for next generation hard disk drives.