Analog Devices Inc. ADM1085AKSZ-REEL7

Overview

ADM1085AKSZ-REEL7 from Analog Devices is a Simple Sequencer IC for controlled power-up of multiple voltage regulators or dc-dc converters. The device monitors the VIN threshold through an external resistor divider, supports monitoring points down to 0.6 V, and starts a capacitor-adjustable enable delay after the upstream rail reaches its threshold. This ADM1085 variant uses active-high ENIN and active-high ENOUT logic with open-drain ENOUT; can be pulled up as high as 22 V, allowing the sequencer to match the enable or shutdown polarity required by the next regulator stage. The device operates with high-voltage VIN and enable inputs up to 22 V, draws 15 µA typical supply current, and is specified over −40°C to +125°C in a 6-lead SC70 package.

For engineers reviewing the ADM1085AKSZ-REEL7 datasheet, ADM1085AKSZ-REEL7 pinout, ADM1085AKSZ-REEL7 application, or ADM1085AKSZ-REEL7 equivalent, this part should be evaluated as a Simple Sequencer for regulator enable timing rather than as a conventional reset supervisor. The main comparison points are enable-input polarity, ENOUT output polarity, open-drain or push-pull output type, adjustable delay capacitor, monitored VIN threshold network, and compatibility with the enable or shutdown input of the downstream regulator.

Technical Context

In a multi-rail startup chain, ADM1085AKSZ-REEL7 is placed between an upstream supply-good node and the enable input of the next regulator. The VIN divider determines the rail threshold, and the CEXT capacitor sets the enable delay using the tEN relationship defined in the data sheet, so the designer can delay the next rail until the previous rail is valid and settled. Key design checks include VIN divider tolerance, CEXT value and leakage, ENIN polarity, ENOUT output type, pull-up voltage for open-drain versions, and whether the downstream converter expects active-high or active-low enable control.

Key Specifications

Pinout & Package

The ADM1085AKSZ-REEL7 pinout is implemented in a 6-lead SC70 package. The functional pins are VCC, GND, VIN, CEXT, ENIN, and ENOUT, with polarity and output-stage behavior determined by the selected ADM1085/ADM1086/ADM1087/ADM1088 variant.

For PCB layout, place the VIN divider close to the VIN pin and route CEXT with low leakage because capacitor current and board contamination can shift the programmed enable delay. Open-drain versions also require a pull-up resistor sized for the target logic rail.

Key Features

• Provides programmable time delays between regulator enable signals.
• Can be cascaded with power modules for multi-supply sequencing.
• Supports power-supply monitoring from 0.6 V using an external resistor divider.
• Offers capacitor-adjustable timing through the CEXT pin.
• Available with open-drain or push-pull output stages depending on the family member.
• Supports high-voltage VIN and enable-related inputs up to 22 V with 15 µA typical current.

Applications

Equivalent & Alternatives

Compared with ADM1086, ADM1087, and ADM1088, ADM1085AKSZ-REEL7 differs mainly by enable-input polarity, enable-output polarity, and open-drain versus push-pull output behavior, so it should be matched to the regulator enable logic and pull-up requirements before replacement.

Quality

ADM1085AKSZ-REEL7 should be sourced through traceable channels with attention to package identity, orderable suffix, and whether the replacement still matches the intended device role.

Production validation should include startup behavior, threshold accuracy, fault response, and the sequencing or monitoring performance that matters for the real end application.

Availability

ADM1085AKSZ-REEL7 is available at Aetrix Electronics and is suitable for maintenance, new design qualification, and repeatable production support in systems that depend on this exact device role.

Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming lifecycle position, package option, operating range, and sourcing continuity helps reduce replacement risk.

Manufacturer

Analog Devices is a semiconductor manufacturer known for analog, mixed-signal, power-management, monitoring, sequencing, and interface products used in industrial, communications, medical, and embedded electronics.

The ADM1085-ADM1088 line is a family of supervisor and timing-control devices used for monitored startup, reset handling, and power-rail qualification in embedded digital systems.

FAQ

What is ADM1085AKSZ-REEL7 used for?

It is used as a supervisory reset and timing controller for board-level supply monitoring.

Where can I find the ADM1085AKSZ-REEL7 datasheet download?

The ADM1085AKSZ-REEL7 datasheet can be accessed from the confirmed manufacturer source used for this family.

What should be considered in ADM1085AKSZ-REEL7 pinout design?

Designers should review the 3-lead SC70 package, control-interface routing, monitoring or sequencing pins, and the actual supply-path layout used by the target board.

Is ADM1085AKSZ-REEL7 a generic regulator?

Only if the device family is actually a regulator. Otherwise it should be treated according to its real monitoring, supervisory, or sequencing role.

What are common ADM1085AKSZ-REEL7 equivalent solutions?

Common candidates depend on package fit, operating range, sequencing or supervisory behavior, and whether the replacement stays with the same electrical job on the board.