Dallas, Tex. Texas Instruments Inc. says it has introduced the smallest 2.25-MHz high-performance, step-down DC/DC converters. Housed in a 6-pin, 2 x 2 mm SON package with a maximum height of 0.8, the TPS62290 device supports low-power DSPs and microcontroller-based portable electronics, and extends battery life in Bluetooth headsets, cell phones and other Li-ion battery-powered applications.
The 300-mA, 600-mA and 1-A synchronous, step-down DC/DC converters can regulate output voltages down to 0.6 V with ±1.5 percent accuracy, enabling the devices to power TI's C5000 and DaVinci DSPs, low-power MSP430 microcontrollers and other controllers with ultra-precise processor core supply requirements.
The TPS62290 provides up to 1 A of output current, and can be powered by a single-cell lithium-ion, three-cell nickel metal hydride (NiMH) and three-cell alkaline batteries with an input voltage range of 2.3 V to 6 V. The converter, which operates at a low 15 uA quiescent current, enters a power save mode during light load operating conditions and maintains efficiency up to 95 percent over the entire load current range. For low-noise applications, the device can be forced into fixed frequency pulse width modulation (PWM) mode by pulling the MODE pin high. In the shutdown mode, the TPS62290's current consumption is reduced to less than 1 uA.
TI also introduced the TPS62260, which supports up to 600 mA of output current, and the TPS62240 to support up to 300 mA. Both devices contain the same functionality and high-performance as the TPS62290 but can support a slightly wider input voltage range of 2 V to 6 V.
Pricing: Suggested retail pricing for the TPS62240 is $0.95 in quantities of 1,000. The TPS62260 is priced at $1.20 and the TPS62290 is priced at $1.75 in quantities of 1,000.
Availability: All three converters are shipping in volume from TI and its authorized distributors.
Product information: Evaluation modules of the TPS622xx converters, application notes and TI's power management ICs
Texas Instruments Inc., 1-800-477-8924, www.ti.com