The power supply IC integrates one current-mode buck DC/DC converter and one low-noise LDO regulator. The buck channel operates from a 2.5 V to 5.5 V supply, provides an adjustable 0.8 V to 4.5 V output, and supports up to 600 mA output current. The G variant LDO provides a fixed 3.3 V output with up to 300 mA load current and typical 55 μVrms output noise. Protection functions include overcurrent protection on both channels, LDO short-circuit protection, undervoltage lockout, thermal shutdown, and a 66 ms power-on-reset delay. The device is specified for −40 °C to +85 °C ambient operation in a 3 mm × 3 mm SON-10 package.
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| Function | Buck DC/DC converter plus low-noise LDO |
| Number of channels | 2 |
| Supply voltage | 2.5 to 5.5V |
| Buck output voltage | 0.8 to 4.5 adjustableV |
| Buck output current | 0.6 maxA |
| Buck switching frequency | 2.0 typicalMHz |
| Buck feedback threshold voltage | 0.3 ±2.5%V |
| Buck PMOS on resistance | 0.35 typicalΩ |
| Buck NMOS on resistance | 0.25 typicalΩ |
| Buck overcurrent protection | 0.9 to 1.5, 1.2 typicalA |
| LDO output voltage | 3.30 ±2.5%V |
| LDO output current | 0.3 maxA |
| LDO dropout voltage | 200 typical at 300 mAmV |
| LDO output noise voltage | 55 typical, 10 Hz to 100 kHzμVrms |
| LDO PSRR | 70 typical at 1 kHz and 10 kHzdB |
| LDO overcurrent protection | 500 to 980, 700 typicalmA |
| LDO short-circuit protection | 150 to 700, 350 typicalmA |
| Power-on-reset hold time | 52.8 to 79.2, 66 typicalms |
| UVLO threshold voltage | 1.95 to 2.25, 2.10 typicalV |
| Operating ambient temperature | -40 to +85°C |
| Package | SON-10, 3 mm × 3 mm |
These are design resources that include the Infineon MB39C022GPN
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