Negative low dropout linear regulator supplies up to 500 mA for noise-sensitive rails. It operates from -1.8 V to -20 V input, provides 0.8 µV RMS integrated output noise from 10 Hz to 100 kHz, and delivers high ripple rejection around 74 dB at 1 MHz. The output voltage is set with a single resistor using a 100 µA SET pin current, and devices can be paralleled to increase output current and spread heat. Protection features include programmable current limit, foldback current limiting, and thermal limiting with hysteresis.
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| Regulator type | Negative low dropout linear regulator |
| Output current | 500mA |
| Input voltage range | -1.8 to -20V |
| Dropout voltage | 235 typicalmV |
| RMS output noise | 0.8, 10 Hz to 100 kHzµV RMS |
| Spot noise | 2.2 at 10 kHznV/√Hz |
| Power supply ripple rejection | 74 at 1 MHzdB |
| SET pin current | 100µA |
| SET pin initial accuracy | ±1% |
| Output voltage programming | Single resistor |
| Minimum output capacitor | 10 ceramicµF |
| Current limit | Programmable with foldback |
| Thermal protection | Thermal limit with hysteresis |
| Parallel operation | Supported for higher current, lower noise, and heat spreading |
| Operating junction temperature, E/I grades | -40 to 125°C |
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