2.75-V to 6-V, 4-A step-down converter in a 2-mm x 3-mm QFN package with -55C extended temperature

The TPS6281xM is family of pin-to-pin 1-A,

2-A, 3-A, and 4-A synchronous step-down DC/DC converters. All devices offer high efficiency

and ease of use. The family of devices is based on a peak current mode control topology.

Low-resistive switches allow up to 4-A continuous output current at high ambient

temperature. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can

also be synchronized to an external clock in the same frequency range. The device can

automatically enter power save mode (PSM) at light loads to maintain high efficiency across

the whole load range. The device provides 1% output voltage accuracy in PWM mode which helps

design a power supply with high output voltage accuracy. The SS/TR pin allows the user to

set the start-up time or form tracking of the output voltage to an external source, allowing

external sequencing of different supply rails and limiting the inrush current during

start-up.

The TPS6281xM device is available in a 2-mm

× 3-mm VQFN package with wettable flanks.