This document describes a power supply integrated circuit (IC) called L6911E. The IC features an operating supply voltage from 5V to 12V buses, up to 1.3A gate current capability, a TTL-compatible 5-bit programmable output compliant with VRM 8.5 (providing output voltage from 1.050V to 1.825V with 0.025V binary steps), voltage mode PWM control, excellent output accuracy (+/-1%) over line and temperature variations, very fast load transient response, power good output voltage, overvoltage protection and monitor, overcurrent protection realized using the upper MOSFET's RdsON, 200kHz internal oscillator, externally adjustable oscillator from 50kHz to 1MHz, and soft start and inhibit functions. The IC is suitable for power supply applications for advanced microprocessor cores and distributed power supply.
The L6911E is a power supply controller specifically designed to provide high-performance DC/DC conversion for high-current microprocessors. It features a precise 5-bit digital-to-analog converter (DAC) that allows the output voltage to be adjusted from 1.050V to 1.825V with 25mV binary steps. The device includes a high-precision internal reference source ensuring output accuracy within ±1% over line and temperature variations.
| Output Voltage Range | 1.050V to 1.825V |
|---|---|
| Voltage Step | 25mV |
| Output Accuracy | ±1% |
| Gate Current Capability | Up to 1.3A |
| Internal Oscillator Frequency | 200kHz |
| Adjustable Frequency Range | 50kHz to 1MHz |
| Package Type | SO-20 |
| Gain-Bandwidth Product | 15 MHz |
| Slew Rate | 10 V/µS |
The output voltage can be adjusted from 1.050V to 1.825V.
The frequency is adjustable from 50kHz to 1MHz using an external resistor connected to the RT pin.
Yes, it includes over-current protection realized using the upper MOSFET's RdsON.
The device provides excellent output accuracy of ±1% over line and temperature variations.