PWM Controller Revs Up Low-Voltage Applications

With an operating frequency of 2 MHz, the TPS43000 BiCMOS pulse width modulation (PWM) controller has been set on course to play a key role in building highly efficient, synchronous rectification dc/dc power conversion units. Applications include both battery-powered portable and non-portable products, such as networking equipment, servers and base stations. The controller can regulate buck, boost, SEPIC and flyback topologies.Intended to ease system design in low voltage applications, the high-frequency PWM controller can work with input voltages as low as that provided by two alkaline or nickel batteries (i.e., 1.8V) through voltages as high as 9.0V. And it can control output voltages spanning a 0.8V to 8.0V range. Operating at 500 kHz, the controller draws just 1 mA, with sleep mode consuming only 100 µA and complete shutdown using a mere 1 µA.The TPS43000 is housed in a compact, low-profile 16-pin TSSOP power package and costs $2.75 each/1,000. For more details, contact TEXAS INSTRUMENTS INC., Santa Clarita, CA. (800) 477-8924, ext. 4500.