Radiation-tolerant, 3V to 7V input quad channel 3A per channel synchronous step-down converter

The TPS7H4104 and TPS7H4102 are 7V, 3A per

channel, multichannel, peak-current mode, synchronous buck converters optimized for

use in area sensitive, space environment applications. The device incorporates four

(TPS7H4104) or two (TPS7H4102) identical channels that can be use to step down the

power input voltage into independent voltages up to 3A per phase or interleaved to

increment the output current up to 12A (TPS7H4104) or 6A (TPS7H4102).

Each channel incorporates the

high-side and low-side power MOSFETs with programmable soft-start and slope

compensation. Additionally, per channel power-good flags and enable signals are

provided. The TPS7H4104 also includes an ENSEQ input that enables a sequential

power‑up and a reverse‑sequence power‑down.

Various current limit mechanisms are

included for robust current limiting during fault conditions. Thermal shutdown

disables the device when the die temperature exceeds thermal limit.