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ADM1186 データシート(PDF) 1 Page - Analog Devices |
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ADM1186 データシート(HTML) 1 Page - Analog Devices |
1 / 28 page Quad Voltage Up and Down Sequencer and Monitor with Programmable Timing ADM1186 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved. FEATURES Powered from 2.7 V to 5.5 V on the VCC pin Monitors four supplies via 0.8% accurate comparators Digital core supports up and down supply sequencing Multiple devices can be cascaded (ADM1186-1) Four inputs can be programmed to monitor different voltage levels with resistor dividers Capacitor programmable supply sequence time delays and a timeout delay to 5% accuracy at 25°C Four open-drain enable outputs Open-drain power-good output Open-drain sequence complete pin and bidirectional open-drain fault pin (ADM1186-1 only) APPLICATIONS Monitor and alarm functions Up and down power supply sequencing Telecommunication and data communication equipment PCs, servers, and notebook PCs GENERAL DESCRIPTION The ADM1186-1 and ADM1186-2 are integrated, four-channel voltage monitoring and sequencing devices. A 2.7 V to 5.5 V power supply is required on the VCC pin for power. Four precision comparators, VIN1 to VIN4, monitor four voltage rails. All four comparators share a 0.6 V reference and have a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the undervoltage (UV) trip points for the monitored supply rails. The ADM1186-1 and ADM1186-2 have four open-drain enable outputs, OUT1 to OUT4, that are used to enable power supplies. An open-drain power-good output, PWRGD, indicates whether the four VINx inputs are above their UV thresholds. A state machine monitors the state of the UP and DOWN pins on the ADM1186-1 or the UP/DOWN pin on the ADM1186-2 to control the supply sequencing direction (see Figure 2). In the WAIT START state, a rising edge transition on the UP or UP/DOWN pin triggers a power-up sequence. A falling edge transition on the DOWN or UP/DOWN pin in the POWER-UP DONE state triggers a power-down sequence. APPLICATION DIAGRAM 5V IN EN OUT ADP1706 5V IN EN OUT ADP2107 5V 3.3V AUX IN EN OUT ADP1821 5V IN EN OUT ADP1706 FAULT UP DOWN DLY_EN_OUT1 DLY_EN_OUT2 DLY_EN_OUT3 DLY_EN_OUT4 BLANK_DLY PWRGD SEQ_DONE VIN1 VIN2 VIN3 VIN4 VCC OUT1 OUT2 GND OUT3 OUT4 ADM1186-1 3.3V AUX 2.5V AUX 2.5V 1.8V 1.2V 3.3V SEQUENCE CONTROL 3.3V AUX 1µF 100nF 3.3V AUX 5V 3.3V AUX 5V Figure 1. |
同様の部品番号 - ADM1186 |
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同様の説明 - ADM1186 |
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