The Texas Instruments TPS7H1101A-SP is a LDO linear regulator suitable in power supply for RF, VCOs, receivers, and amplifiers. The regulator is suitable for satellite point of load supply for FPGAs, microcontrollers, ASICs, and data converters. The regulator is radiation-hardened and uses a PMOS pass element configuration. The thermal protection, current limit and current foldback features of the regulator make it suitable for space environment.
The component allows for an implementation of a precise and programmable foldback current limit with a wide adjustment range. Thermal protection is provided by disabling the output when a certain junction temperature is reached.
Complex power requirements of DSPs, microcontrollers or FPGAs are supported by the component through the programmable soft start, enable on and off functionality, a Power Good open-drain output and current sharing capability. The device has been designed to offer a high level of PSRR.
The regulator is packaged in a 16-pin ceramic flatpack (HKR) enabling high thermal performance. The system features are designed to provide a higher reliability, flexibility and can configured to use in parallel operation.
The current sense (CS) monitoring feature helps to indicate the voltage proportional to the output current when a resistor is connected the CS terminal. The foldback current limit is enabled when the voltage at CS is pulled greater than 90% of Vref and is disabled when it is pulled below 0.544 V.
Overcurrent limit activation point is set by connecting a resistor from the programmable current limit (PCL) terminal to ground and when is reached, LDO goes into current foldback mode.
The LDO can be enabled or disabled using the enable feature. The status of the output voltage regulation is indicated using the open-drain connection, Power Good (PG) which adds to the flexibility in control and monitoring.
- Space satellite point of load supply for FPGAs, microcontrollers, ASICs, and data converters
- Radiation-hardened low-noise linear regulator power supply for RF, VCOs, receivers, and amplifiers
- Clean analog supply requirements
- Command and data handling (C&DH)
- Optical imaging payload
- Radar imaging payload
- Satellite electrical power system (EPS)
Orderable Part Numbers
- Radiation hardness assurance (RHA) qualified up to total ionizing dose (TID) 100 krad(Si)
- ELDRS-free: 100 krad(Si)
- Dose rate: 10 mrad(Si)/s
- Single event latch-up (SEL) immune to LET=85 MeV-cm2/mg
- SEB and SEGR immune to LET=85 MeV-cm2/mg
- SET/SEFI onset threshold > 40 MeV-cm2/mg
- Specifically designed to always upset low to avoid damage to critical downstream component
- SET/SEFI cross-section plot
- Ultra-low VIN range: 1.5 V to 7 V
- 3-A maximum output current
- Current share/parallel operation to provide up to 6-A output current
- Stable with ceramic output capacitor
- ±2% accuracy over line, load, and temperature
- Programmable soft start through external capacitor
- Input enable across all input voltages and power-good output for power sequencing
- Ultra-low dropout LDO voltage: 62 mV at 1 A (25°C), VOUT =1.8 V
- Low noise: 20.33 µVRMS, VIN =2 V, VOUT =1.8 V at 3 A
- PSRR: over 45 dB at 1 kHz
- Excellent load/line transient response
- Foldback current limit
- Thermally-enhanced CFP package, 0.4° C/W RθJC
- 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
- TPS7H1101A-SP Neutron Displacement Damage (NDD) Characterization
- TPS7H1101A-SP Total Ionizing Dose (TID) Radiation Report
- Single-Event Effects Test Report of the TPS7H1101A-SP LDO
- Application note
- Failure Containment in Spacecraft Point-of-Load Power Supplies
- Single-Event Effects Confidence Interval Calculations
- Heavy Ion Orbital Environment Single-Event Effects Estimations
- Use of an LDO as a Load Switch for Space Applications
- Selection guide
- Technical article
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Last updated: 2021-12-21