TPS7H4001-SP Datasheet | Texas Instruments

Features - Radiation performance: - Radiation-hardness-assured up to TID 100 krad(Si) - SEL, SEB, and SEGR immune to LET = 75 Me V-cm2/mg - SET and SEFI characterized up to LET = 75 Me V-cm2/mg - Peak efficiency: 95.5% (VO = 1 V at 100 k Hz) - Power rail: 3 V to 7 V on VIN - Flexible switching frequency options: - 100-k Hz to 1-MHz adjustable internal oscillator - External sync capability: 100-k Hz to 1-MHz - SYNC pins can be configured as 500-k Hz clocks at 90° out of phase to parallel up to 4 devices - 0.6-V ±1.5% voltage reference over temperature, radiation, and line and load regulation for CDFP, KGD (known good die), and HTSSOP (QMLP) options - 0.6-V ±1.7% voltage reference over temperature, radiation, and line and load regulation for HTSSOP (SHP) option - Monotonic start-up into prebiased outputs - Adjustable slope pensation and soft-start - Adjustable input enable and power-good output for power sequencing VIN PVIN VIN PWRGD PHASE PWRGD VOUT VSENSE SSTR RT P PGND GND THERMAL PAD 2 Applications - Space satellite point of load supply 3 Description The TPS7H4001-SP is a radiation-hardness-assured, 7-V, 18-A synchronous buck converter with integrated low-resistance high-side and low-side MOSFETs. High efficiency and reduced ponent count are achieved through current mode control. The output voltage start-up ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is possible by correctly configuring the enable and the power good pins. The TPS7H4001-SP can be configured in primary-secondary mode and with the SYNC2 pin, four devices can be configured in parallel without an external clock. Cycle-by-cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current protection which prevents current runaway. Thermal shutdown disables the part when die temperature exceeds thermal...