ADM1085AKSZ-REEL7

ADM1085 is a simple sequencing circuit that provides a time delay between the enabling of voltage regulators and/or dc-dc converters at power-up in multiple supply systems. When the output voltage of the first power module reaches a preset threshold, a time delay is initiated before an enable signal allows subsequent regulators to power up. Any number of these devices can be cascaded with regulators to allow sequencing of multiple power supplies. Threshold levels can be set with a pair of external resistors in a voltage divider configuration. With appropriate resistor values, the threshold can be adjusted to monitor voltages as low as 0.6V. Typical applications are desktop/notebook computers, servers, low power portable equipment, routers, base stations, line cards, graphics cards.

• Provide programmable time delays between enable signals, capacitor-adjustable time delays
• Can be cascaded with power modules for multiple supply sequencing
• High voltage (up to 22V) enable and VIN inputs, active-high (ENOUT) logic output
• Enable input pin allows the output signal to the regulator to be controlled externally
• VCC operating voltage range from 2.25 to 3.6V (TA=-40°C to +125°C, VCC=full operating range)
• Supply current is 15μA max (TA=-40°C to +125°C, VCC=full operating range)
• Threshold temperature coefficient is 30ppm/°C (TA=-40°C to +125°C, VCC=full operating range)
• 6-lead thin shrink small outline transistor package (SC70)
• Temperature rating range from −40°C to +125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party