Electronic Design

Power-Supply Sequencer ICs Expand Functional Range

Two supervisor/sequencing ICs bring fault protection and sequencing logic to multi-power-supply systems. Analog Devices' ADM106x Super Sequencer and ADM108x Simple Sequencer families expand the company's portfolio of supervisor/sequencing ICs for power-supply systems for infrastructure systems.

The ADM106x family consists of user-configurable devices that monitor up to 10 power supplies, with five of the inputs configurable as general-purpose logic. They can detect voltages as low as 0.6 V up to 14.4 V while offering total system management, including power-supply margining. An on-chip 12-bit analog-to-digital converter (ADC) facilitates read-back of the supply voltages. It also can be used in a closed-loop system with on-chip digital-to-analog converters (DACs) for adjustments and margining.

The ADM108x family consists of low-cost cascadable ICs. Its devices can be adjusted to monitor voltages from 0.6 to 22 V. During power-up conditions, they can provide time delays between the enabling of individual voltage regulators, providing power-up sequencing in multi-supply systems. This is especially useful for enabling peripheral ICs. Rated for −40°C to 125°C, AMD108x devices consume just 15 µA.

Super Sequencer ADM106x devices come in 40-lead lead-frame chip-scale packages (LFCSPs) and 48-lead twin quad flat packs (TQFPs). They range in price from $4 each (ADM1068) to $9 each (ADM1062) in 10,000-unit lots. Simple Sequencer ADM108x devices, housed in six-lead SC70 packages, start at $0.30 each in 10,000-unit lots. All devices are being sampled now, with production quantities available in June.

Analog Devices Inc.
www.analog.com

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