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2022-09-24 23:20:14
ADM1051-Precision Dual Regulator Controller
OVERVIEW The ADM1051/ADM1051A are dual, precision, voltage regulator railroad generation and power active bus controllers intended for termination on PC motherboards. They contain a precision 1.2 V bandgap reference and a two-channel control amplifier to drive external power devices. Each channel has a shutdown input to shut down the amplifier output and hiccup mode external power supply device protection circuitry. The shutdown 1.5 V channel input can also be used with a signal on the TYPEDET PC motherboard to select the output voltage. The ADM1051/ADM1051A operates from a 12 V supply, which gives the amplifier enough headroom to drive an external N-channel MOSFET, as source follower operates, through a range of external devices. The advantage of this is that N-channel devices are cheaper in performance than comparable P-channel devices, and circuits are easier to use than a P-channel device stabilized in a common source configuration.
Features Two independent controllers on one chip
1.515 V and 1.818 V output shutdown input control each channel suitable for PC motherboard TYPEDET signal accuracy up to 2.5%, line, load and temperature low quiescent current Fail-safe mode requires no external voltage or current setting resistors
1.8 V/3.3 V ICH for sequencing on the ADM1051A
Small, 8-Pin SOIC Package
Application Desktop Computer Server Workstation