Electrical and electronic equipment (EEE) > Power management components > Step-down switching regulators > Radiation-hardness-assured (RHA), 3-V to 7-V input, 18-A, synchronous step-down converter
Summary
The Texas Instruments TPS7H4001-SP is a synchronous buck converter suitable for satellite point of load supply, communications and optical imaging payload.
The converter is radiation hardened available in a thermally enhanced ceramic flatpack package with integrated low-resistance high-side and low-side MOSFETs. Current mode control helps achieve high efficiency and reduced component count.
SS/TR pin controls the output voltage start-up ramp allowing operation as either in tracking situations or a stand-alone power supply. With a correct configuration of the enable and the power good pins, power sequencing also possible.
The converter can be configured in primary-secondary mode and with the SYNC2 pin, four devices can be configured in parallel without an external clock.
To protect the device, current runway is prevented by low-side sourcing current limit and the overload situations are prevented by cycle-by-cycle current limiting on the high-side FET.
Low-side sinking current limit turns off the low-side MOSFET preventing the excessive reverse current. When thermal shutdown temperature is exceeded by the die temperature, the component is disabled by thermal shutdown.
Applications
- Space satellite point of load supply
- Communications payload
- Optical imaging payload
Orderable Part Numbers
- 5962-1820501VXC
- 5962R1820501V9A
- 5962R1820501VXC
- TPS7H4001HKY/EM
Key features
- Radiation performance:
- Radiation-hardness-assured up to
TID 100 krad(Si) - SEL, SEB, and SEGR immune to
LET=75 MeV-cm2/mg - SET and SEFI characterized up to
LET=75 MeV-cm2/mg
- Radiation-hardness-assured up to
- Peak efficiency: 95.5% (VO=1 V at 100 kHz)
- Integrated 22-mΩ and 17-mΩ MOSFETs
- Power rail: 3 V to 7 V on VIN
- Flexible switching frequency options:
- 100-kHz to 1-MHz adjustable internal oscillator
- External sync capability: 100-kHz to 1-MHz
- SYNC pins can be configured as 500-kHz clocks at 90° out of phase to parallel up to
4 devices
- 6-V ±1.5% voltage reference over temperature, radiation, and line and load regulation
- Monotonic start-up into prebiased outputs
- Adjustable slope compensation and soft-start
- Adjustable input enable and power-good output for power sequencing
- Power-good output monitor for undervoltage and overvoltage
- 34-pin, thermally-enhanced ceramic flatpack package (HKY) for space applications
Development Kits
- TPS7H4001QEVM-CVAL - 4-channel, 72-A, 3-V to 7-V input, synchronous step-down converter evaluation module
- ALPHA-XILINX-KU060-SPACE - Alpha Data® board for Xilinx® Kintex® UltraScale™ XQRKU060 FPGA with TI power
Testing & qualification
Below are the technical documentations available for this product:
- Radiation & reliability report
- Single-Event Effects Test Report of the TPS7H4001-SP (Rev. A)
- TPS7H4001-SP Total Ionizing Dose (TID) Radiation Report
- TPS7H4001-SP Neutron Displacement Damage Characterization
- Application note
- Single-Event Effects Confidence Interval Calculations
- Heavy Ion Orbital Environment Single-Event Effects Estimations
- Selection guide
- White paper
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Last updated: 2021-12-21
TPS7H4001-SP
Radiation-hardness-assured (RHA), 3-V to 7-V input, 18-A, synchronous step-down converter
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