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ADM1270 반도체 회로 부품 판매점

High Voltage Input Protection Device



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Analog Devices
ADM1270 데이터시트, 핀배열, 회로
Data Sheet
High Voltage Input Protection Device
ADM1270
FEATURES
Controls supply voltages from 4 V to 60 V
Gate drive for low voltage drop reverse supply protection
Gate drive for P-channel FETs
Inrush current limiting control
Adjustable current limit
Foldback current limiting
Automatic retry or latch-off on current fault
Programmable current-limit timer for safe operating area (SOA)
Power-good and fault outputs
Analog undervoltage (UV) and overvoltage (OV) protection
16-lead, 3 mm × 3 mm LFCSP
16-lead QSOP
APPLICATIONS
Industrial modules
Battery-powered/portable instrumentation
GENERAL DESCRIPTION
The ADM1270 is a current-limiting controller that provides
inrush current limiting and overcurrent protection for modular
or battery-powered systems. When circuit boards are inserted
into a live backplane, discharged supply bypass capacitors draw
large transient currents from the backplane power bus as they
charge. These transient currents can cause permanent damage
to connector pins, as well as dips on the backplane supply that
can reset other boards in the system.
The ADM1270 is designed to control the inrush current, when
powering on the system, via an external P-channel field effect
transistor (FET).
To protect the system from a reverse polarity input supply, there
is a provision made to control an additional external P-channel
FET. This feature prevents reverse current flow in case of a reverse
polarity connection, which can damage the load or the ADM1270.
The ADM1270 is available in a 3 mm × 3 mm, 16-lead LFCSP and
a 16-lead QSOP.
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
VCC/SENSE+ SENSE–
RPFG
VCAP
LDO
+–
ADM1270
UV
1V
OV
1V
+
+
IOUT
GATE DRIVE/
LOGIC
GATE
ISET
REF
SELECT
CURRENT-
LIMIT
CONTROL
TIMEOUT
CURRENT
+ LIMIT
TIMER
ON
TIMER
VCB
ENABLE FAULT PWRGD GND
Figure 1.
FLB
FB_PG
TIMER_OFF
TIMER
Rev. A
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2014–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


ADM1270 데이터시트, 핀배열, 회로
ADM1270* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
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Evaluation Kits
• ADM1270 Evaluation Board
Documentation
Data Sheet
• ADM1270: High Voltage Input Protection Device Data
Sheet
User Guides
• UG-760: Evaluating the ADM1270 High Voltage Input
Protection Device
Tools and Simulations
• ADM1270 Design Worksheet Tool
Design Resources
• ADM1270 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
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Technical Support
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* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.




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