The ADM1051/ADM1051A is a dual voltage regulator controller produced by Analog Devices, with 1.515V and 1.818V outputs, support PC motherboard TYPEDET signal, low quiescent current and low shutdown current.
The ADM1051/ADM1051A are dual, precision voltage regulator controllers intended for power rail generation and active bus termination on personal computer motherboards. They contain a precision 1.2 V bandgap reference and two channels consisting of control amplifiers driving external power devices. Each channel has a shutdown input to turn off amplifier output and Hiccup Mode protection circuitry for the external power device.
The devices operate from a 12 V supply and work with external N-channel MOSFETs for low cost. The shutdown input on the 1.5 V channel can also be used with the TYPEDET signal on a PC motherboard to select the output voltage. The ADM1051A variant provides 1.8 V/3.3 V ICH sequenced power-up.
| Output Voltage Channel 1 | 1.515 V |
|---|---|
| Output Voltage Channel 2 | 1.818 V |
| Output Voltage Accuracy | ±2.5% |
| Supply Voltage | 12 V |
| Package Type | 8-Lead SOIC |
| Operating Temperature Range | 0°C to 70°C |
| Supply Current Normal Operation | 2.4 mA |
| Supply Current Shutdown Mode | 600 µA |
The device provides two independent outputs of 1.515 V and 1.818 V.
The output voltage accuracy is ±2.5% over line, load, and temperature.
It works with external N-channel MOSFETs for low cost.
The controllers operate from a 12 V supply.