Single-phase synchronous step-down DC/DC controller drives external N-channel MOSFETs in a constant-frequency voltage-mode architecture. The controller supports Intel IMVP-6 and IMVP-6.5 VID features, 4.5 V to 36 V input operation, and a phase-lockable 150 kHz to 550 kHz switching frequency. Differential remote output sensing, programmable active voltage positioning, current monitoring, UVLO, overvoltage protection, overcurrent protection, PWRGD, and thermal-throttling flags are included. The EUHF package variant uses a 38-lead 5 mm by 7 mm plastic QFN with exposed pad and is specified for a -40 °C to 125 °C junction temperature range.
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| Controller topology | Synchronous step-down DC/DC controller |
| Number of phases | 1 |
| Input voltage range | 4.5 to 36V |
| Switching frequency range | 150 to 550kHz |
| Minimum on-time | <35ns |
| Output voltage programming | 7-bit IMVP-6/IMVP-6.5 VID code |
| Package | 38-lead 5mm × 7mm plastic QFN with exposed pad |
| Operating junction temperature range | -40 to 125°C |
| Internal VCC voltage | 4.9 min, 5.2 typ, 5.5 maxV |
| VIN supply current, normal mode | 11 typ, 27 maxmA |
| Shutdown supply current | 100 maxµA |
| EXTVCC switchover voltage | 4.25 min, 4.50 typ, 4.75 maxV |
| INTVCC undervoltage reset | 3.7 min, 3.9 typ, 4.1 maxV |
| Error amplifier DC gain | 80dB |
| Error amplifier unity-gain bandwidth | 20MHz |
| Thermal resistance, junction to ambient | 34°C/W |
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These are design resources that include the Analog Devices LTC3816EUHF
Demonstration circuit 1672A features the LTC3816 for Intel IMVP-6/6.5 CPUs, providing 25A output current with 4.5V to 28V input and 7-bit VID voltage programming.
