The document describes a high-performance DC/DC power supply controller specifically designed for high current microprocessors. The device implements a dual-phase step-down controller with a 180° phase-shift between each phase. A precise 5-bit digital to analog converter (DAC) allows adjusting the output voltage from 0.800V to 1.550V with 25mV binary steps managing On-The-Fly VID code changes. The high precision internal reference assures the selected output voltage to be within ±0.6%. The high peak current gate drive affords to have fast switching to the external power mos providing low switching losses. The device assures a fast protection against load over current and load over/unde
The L6919E is a power supply controller designed for high-performance DC/DC conversion in high current microprocessor applications. It features a dual-phase step-down topology with a 180° phase shift, allowing for fast load transient response and efficient power delivery.
Key characteristics include an integrated high-current gate driver capable of up to 2A source current, TTL-compatible 5-bit programmable output voltage from 0.8V to 1.55V, and dynamic VID management. The device also incorporates overvoltage protection (OVP), under-voltage protection (UVP), and overcurrent protection realized using the lower MOSFET's Rds(on) or a sense resistor.
| Output Voltage Range | 0.800V to 1.550V |
|---|---|
| Voltage Step Resolution | 25mV |
| Output Voltage Accuracy | 0.6% |
| Gate Driver Source Current (High Side) | 2A |
| Maximum Junction Temperature | 150 °C |
| Package Type | SO-28 |
The oscillator is externally adjustable, but if not connected it defaults to 150kHz per channel (300kHz on the load).
Overcurrent protection is realized using either the lower MOSFET's Rds(on) or a sense resistor.
The device allows adjusting the output voltage with 25mV binary steps.