Ultralow-noise CMOS linear regulator operates from a 2.2 V to 5.5 V input and supplies up to 150 mA. The regulator provides 9 μV rms output noise, 70 dB PSRR at 10 kHz, and 105 mV typical dropout at a 150 mA load. Fixed output voltage options span 1.8 V to 3.3 V, with logic-controlled enable, current-limit protection, and thermal-overload protection. The device is offered in 5-lead TSOT and 4-ball WLCSP package options and is specified over a −40°C to +125°C junction temperature range.
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| Regulator type | CMOS linear regulator |
| Maximum output current | 150mA |
| Input voltage range | 2.2 to 5.5V |
| Fixed output voltage range | 1.8 to 3.3V |
| Output voltage accuracy | ±1 initial% |
| Typical dropout voltage | 105 at 150 mA loadmV |
| Typical quiescent current | 10 at zero loadµA |
| Maximum shutdown current | 1.0 over -40°C to +125°CµA |
| Output noise | 9 from 10 Hz to 100 kHzµV rms |
| PSRR | 70 at 10 kHzdB |
| PSRR at 100 kHz | 55dB |
| Start-up time | 150 typicalµs |
| Current-limit threshold | 190 min, 260 typ, 400 maxmA |
| Enable input logic high | 1.2 minV |
| Enable input logic low | 0.4 maxV |
| Recommended input/output capacitance | 1 ceramic, 0.7 minimumµF |
| Operating junction temperature | -40 to +125°C |
| Thermal shutdown threshold | 150 typical°C |
| Package options | 5-lead TSOT; 4-ball 0.8 mm x 0.8 mm WLCSP |
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