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ADM1087

Features: Provide programmable time delays between enablesignals Can be cascaded with power modules for multiplesupply sequencing Power supply monitoring from 0.6 V Output stages: High voltage (up to 22 V) open-drain output (ADM1085/ADM1087) Push-pull output (ADM1086/ADM1088) Capacitor-adjustabl...

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ADM1087: Features: Provide programmable time delays between enablesignals Can be cascaded with power modules for multiplesupply sequencing Power supply monitoring from 0.6 V Output stages: High voltage (up ...

ADM1087 Data Sheet

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Part Number:
ADM1087
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/24

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Product Details

Description



Features:

Provide programmable time delays between enable  signals
Can be cascaded with power modules for multiple  supply sequencing
Power supply monitoring from 0.6 V
Output stages:
   High voltage (up to 22 V) open-drain output  (ADM1085/ADM1087)
   Push-pull output (ADM1086/ADM1088)
Capacitor-adjustable time delays
High voltage (up to 22 V) Enable and VIN inputs
Low power consumption (15 µA)
Specified over 40°C to +125°C temperature range
6-lead SC70 package


Application

Desktop/notebook computers, servers
Low power portable equipment
Routers
Base stations
Line cards
Graphics cards


Pinout

Connection Diagram


Specifications

Parameter                                                                                                   Rating
VCC                                                                                                −0.3 V to +6 V
VIN                                                                                               −0.3 V to +25 V
CEXT                                                                                               −0.3 V to +6 V
ENIN, ENIN                                                                                   −0.3 V to +25 V
ENOUT, ENOUT (ADM1085, ADM1087)                                          −0.3 V to +25 V
ENOUT, ENOUT (ADM1086, ADM1088)                                            −0.3 V to +6 V
Operating Temperature Range                                                  −40°C to +125°C
Storage Temperature Range                                                     −65°C to +150°C
JA Thermal Impedance, SC70                                                                146°C/W
Lead Temperature   
Soldering (10 s)                                                                                          300°C
Vapor Phase (60 s)                                                                                     215°C
Infrared (15 s)                                                                                            220°C


Description

The ADM1085/ADM1086/ADM1087/ADM1088 are simple sequencing circuits that provide a time delay between the  enabling of voltage regulators and/or dc-dc converters at powerup 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 of ADM1085/ADM1086/ADM1087/ADM1088 can be set with a pair of external resistors in a  voltage divider configuration. By choosing appropriate resistor  values, the threshold can be adjusted to monitor voltages as low  as 0.6 V. The simple sequencers are specified over the extended −40°C to  +125°C temperature range. With low current consumption of 15  µA (typ) and 6-lead SC70 packaging, the parts are suitable for  low-power portable applications.




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