The product is a high-performance DC-DC converter that can provide power for high current microprocessors. It has a 5-bit digital to analog converter (DAC) that allows adjusting the output voltage from 1.30V to 2.05V with 50mV binary steps and from 2.10V to 3.50V with 100mV binary steps. The high precision internal reference assures the selected output voltage to be within ±1%. 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 overcurrent and load overvoltage. An external SCR is triggered to crowbar the input supply in case of hard over-voltage. An internal crowbar is also used to protect the output voltage.
The L6911D is a power supply controller designed for high-performance DC/DC conversion in high-current microprocessor applications. It features a 5-bit digital-to-analog converter (DAC) that allows precise adjustment of the output voltage from 1.100V to 1.850V in 25mV steps, with an accuracy of ±1% over line and temperature variations.
The device operates with a supply voltage (VCC) ranging from 5V to 12V and includes a 200kHz internal oscillator that is externally adjustable from 50kHz to 1MHz. It provides TTL-compatible programmable output, voltage-mode PWM control, and fast load transient response from 0% to 100% duty cycle. Protection features include over-current protection realized using the upper MOSFET's Rds(on), over-voltage protection with an external SCR trigger, and a power good output.
| Supply Voltage Range | 5V to 12V |
|---|---|
| Output Voltage Range | 1.100V to 1.850V |
| Output Voltage Accuracy | ±1% |
| Internal Oscillator Frequency | 200kHz |
| Adjustable Frequency Range | 50kHz to 1MHz |
| Gate Current Capability | Up to 1.3A |
| Package Type | SO-20 |
| Turn-On Vcc Threshold | 4.6 V |
| Soft Start Current | 10 µA |
| Error Amplifier DC Gain | 88 dB |
The output voltage can be precisely regulated from 1.100V to 1.850V with 25mV binary steps.
The frequency is adjustable from 50kHz to 1MHz using an external resistor (RT) connected between the RT pin and GND or VCC.
The device enters HICCUP mode, discharging the soft start capacitor.
Yes, the VID pins are TTL compatible inputs that are internally pulled-up.