ISL75051SEH
3A, Rad Hard, Positive, Ultra Low Dropout Regulator
Key Features
- DLA SMD# 5962-11212
- Output Current Up to 3.0A at TJ = +150°C
- Output Accuracy ±1.5% over MIL Temp Range
- Ultra Low Dropout:
- 65mV Typ Dropout at 1.0A
- 225mV Typ Dropout at 3.0A
- Noise of 100µVRMS from 300Hz to 300kHz
- SET Mitigation with No Added Filtering/Diodes
- Input Supply Range: 2.2V to 6.0V
- Fast Load Transient Response
- Shutdown Current of 1µA Typ
- Output Adjustable Using External Resistors
- PSRR 66dB Typ @ 1kHz
- Enable and PGood Feature
- Programmable Soft-start/Inrush Current Limiting
- Adjustable Overcurrent Limit from 0.5A to 8.5A
- Over-temperature Shutdown
- Stable with 47µF Min Tantalum Capacitor
- 18 Ld Ceramic Flatpack Package
- Radiation Environment
- High Dose Rate (50-300rad(Si)/s): 100krad(Si)
- Low Dose Rate (0.01rad(Si)/s): 100krad(Si)**Product capability established by initial characterization. The "EH" version is acceptance tested on a wafer by wafer basis to 50 krad(Si) at low dose rate
Description
The ISL75051SEH is a radiation hardened low-voltage, high-current, single-output LDO specified for up to 3.0A of continuous output current. These devices operate over an input voltage range of 2.2V to 6.0V and are capable of providing output voltages of 0.8V to 5.0V adjustable based on resistor divider setting. Dropout voltages as low as 65mV can be realized using the device.
The OCP pin allows the short circuit output current limit threshold to be programmed by means of a resistor from the OCP pin to GND. The OCP setting range is from 0.5A minimum to 8.5A maximum. The resistor sets the constant current threshold for the output under fault conditions. The thermal shutdown disables the output if the device temperature exceeds the specified value. It subsequently enters an ON/OFF cycle until the fault is removed. The ENABLE feature allows the part to be placed into a low current shutdown mode that typically draws about 1µA. When enabled, the device operates with a typical low ground current of 11mA, which provides for operation with low quiescent power consumption.
The device is optimized for fast transient response and single event effects. This reduces the magnitude of SET seen on the output. Additional protection diodes and filters are not needed. The device is stable with tantalum capacitors as low as 47µF and provides excellent regulation all the way from no load to full load. Programmable soft-start allows the user to program the inrush current by means of the decoupling capacitor value used on the BYP pin.
Applications
- LDO Regulator for Space Application
- DSP, FPGA and µP Core Power Supplies
- Post-regulation of Switched Mode Power Supplies
- Down-hole Drilling
