ADM1200

The ADM1200 is FET driver capable of driving N channel FETs. Is features a capacitor programmable SLEW rate control system ensuring that the output voltage rises and falls at a controlled rate and in a linear fashion. The ADM1200 is designed to ensure that the output voltage follows the voltage on the SLEW pin to within ~100mV. It can also be cascaded to perform simple tracking functionality of supply rails ensuring that each voltage rails track within ~100mV of each other in multi supply systems. Any number of these devices can be cascaded to form a multi supply tracking solution.

The ADM1200 requires 2.7V to 16.5V on its Vcc pin to operate. An on-board charge pump generates a high voltage GATE drive to fully enhance FETs in the power path.

The Slew Rate of the ramp is adjustable via an external capacitor on the C_SLEW pin and can be programmed from 100V/s to 1000V/s. When multiple devices are cascaded the C_SLEW pin of each subsequent device should be tied to the output rail(V_OUTFB) of the previous device to ensure that supply will slew up and down with the previous supply.

The ADM1200 is offered in two variants. The product features an UP/DOWNb pin,  Up/STOPb pin. For both devices a high level on the this input will initiate tracking up sequence. A low on the UP/DOWNb pin of the product will initiate a tracking down of the supply rails, while a low on the UP/STOPb pin of the product will initiate an emergency fast shutdown of all supply rails simultaneously. The ADM1200 is packaged in a tiny 6-pin SOT-23 package.