MIC2003/2013 Fixed Current Limit Power Distribution Switch0 pages

MIC20XX Family
Fixed and Adjustable Current Limiting
Power Distribution Switches
Kickstart is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
CableCARD is a trademark of CableLabs.
Protected by U.S. Patent No. 7,170,732
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
General Description
MIC20XX family of switches are current limiting, high-side power switches, designed for general purpose power distribution and control in digital televisions (DTV), printers, set top boxes (STB), PCs, PDAs, and other peripheral devices. See Functionality Table on page 6 and Pin Configuration Drawings on page 8.
MIC20XX family’s primary functions are current limiting and power switching. They are thermally protected and will shutdown should their internal temperature reach unsafe levels, protecting both the device and the load, under high current or fault conditions
Features include fault reporting, fault blanking to eliminate noise-induced false alarms, output slew rate limiting, under voltage detection, automatic-on output, and enable pin with choice of either active low or active high enable. The FET is self-contained, with a fixed or user adjustable current limit. The MIC20XX family is ideal for any system where current limiting and power control are desired.
The MIC201X (3 x 9) and MIC2019A switches offer a unique new patented feature: Kickstart™, which allows momentary high current surges up to the secondary current limit (ILIMIT_2nd) without sacrificing overall system safety.
The MIC20xx family is offered, depending on the desired features, in a space saving 5-pin SOT-23, 6-pin SOT-23, and 2mm x 2mm MLF® packages.
Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com.
Features
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MIC20X3 – MIC20X9 70mÙ typical on-resistance @ 5V
•
MIC2005A/20X9A
170mÙ typical on-resistance @ 5V
•
Enable active high or active low
•
2.5V – 5.5V operating range
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Pre-set current limit values of 0.5A, 0.8A, and 1.2A*
•
Adjustable current limit 0.2A to 2.0A* (MIC20X7-MIC20X9)
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Adjustable current limit 0.1A to 0.9A* (MIC20X9A)
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Under voltage lock-out (UVLO)
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Variable UVLO allows adjustable UVLO thresholds*
•
Automatic load discharge for capacitive loads*
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Soft start prevents large current inrush
•
Adjustable slew rate allows custom slew rates*
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Automatic-on output after fault
•
Thermal Protection
* Available on some family members
Applications
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Digital televisions (DTV)
•
Set top boxes
•
PDAs
•
Printers
•
USB / IEEE 1394 power distribution
•
Desktop and laptop PCs
•
Game consoles
•
Docking stations
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Typical Application
September 2009
M9999-090309-A