Nonsynchronous step-down switching regulator provides up to 1.2 A load current from a 3.0 V to 20 V input range. The regulator uses current-mode control with an integrated high-side MOSFET and operates at a fixed 700 kHz switching frequency. Output voltage can be set from 0.8 V to 0.85 times the input voltage with ±2% output accuracy over temperature. Protection features include undervoltage lockout, overcurrent protection, short-circuit protection, thermal shutdown, internal compensation, and soft start. The device is supplied in a 6-lead TSOT package and is rated for a −40°C to +125°C junction temperature range.
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| Regulator topology | Nonsynchronous step-down |
| Maximum load current | 1.2A |
| Input voltage range | 3.0 to 20V |
| Switching frequency | 700kHz |
| Output voltage range | 0.8 to 0.85 × VINV |
| Output accuracy | ±2% |
| Feedback regulation voltage | 0.800 typicalV |
| Supply current | 640 typical, 800 maxµA |
| Shutdown current | 18 typical, 35 maxµA |
| Peak current limit | 1.9 typicalA |
| High-side switch on resistance | 440 typicalmΩ |
| Minimum on time | 100 typicalns |
| Soft start time | 1460µs |
| Enable input threshold | 1.2 typicalV |
| Thermal shutdown threshold | 140°C |
| Operating junction temperature range | -40 to +125°C |
| Thermal resistance junction-to-ambient | 186.02°C/W |
| Package | 6-lead TSOT |
| RoHS | Compliant |
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