The simple-to-design switchers, which come in a monolithic package, speed time to market, reduce external component count and help reduce cost for point-of-load systems used in a wide variety of applications including HDTVs, set-top boxes and other consumer electronic systems.

TI's new 2-A TPS54283 and TPS54286 and 3-A TPS54383 and TPS54386 SWIFT converters reduce input capacitance by switching each output at 180 degrees out-of-phase at a frequency of 300 kHz and 600 kHz. Each device features current mode control and integrates the compensation components to lower the total number of required external parts. A unique sequencing pin helps designers meet critical sequencing requirements without additional circuitry by allowing the user to select which output ramps up first or to program both outputs to ramp ratio-metrically.

TI's new dual-channel, non-synchronous converters provide high efficiency and 1.5 percent output voltage accuracy (down to 0.8 V) for each output. With three selectable levels of over-current protection, low on-resistance and a thermal shutdown of 145C, the devices excel in hot environments where good thermal performance is needed, such as a DLP® high-definition digital TV that operates without the use of a cooling fan.

Key Features of TI's 2-A and 3-A SWIFT Converters:
4.5 V to 28 V input range
Output voltage down to 0.8 V with 1.5 percent accuracy to meet the newest DSP and FPGA power requirements
Dual PWM outputs 180 degrees out-of-phase
90 percent and higher efficiency at 2-A and 3-A continuous output current
Fixed 300 kHz switching frequency (TPS54283 and TPS54383) and 600 kHz (TPS54286 and TPS54386)
Internal 2.2 ms soft start time, plus ratio-metric or sequential start-up modes, selectable by a single pin
85 mOhm internal high-side MOSFETs
Pulse-by-pulse over-current protection -Texas Instruments