MIC2026A/2076A
Dual-Channel Power Distribution Switch
General Description
The MIC2026A and MIC2076A are high-side MOSFET
switches optimized for general-purpose power distribution
requiring circuit protection. The MIC2026A is particularly
well suited for USB applications.
The MIC2026A/2076A are internally current limited and
have thermal shutdown that protects the device and load.
The MIC2076A offers “smart” shutdown that reduces
current consumption in fault modes. When the MIC2076A
goes into thermal shutdown due to current limiting, the
output is latched off until the switch is reset. The
MIC2076A can be reset by removing the load, toggling the
enable input, or cycling VIN.
Both devices employ soft-start circuitry that minimizes
inrush current in applications where highly capacitive loads
are employed.
A fault status output flag is asserted during overcurrent or
thermal shutdown conditions. Transient faults are internally
filtered.
The MIC2026A/2076A are available in an 8-pin SOIC
package.
All support documentation can be found on Micrel’s web
site at
www.micrel.com.
Features
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100mΩ typical R
DS(ON)
at 5.0V
140mΩ maximum R
DS(ON)
at 5.0V
2.7 V to 5.5 V operating range
500mA minimum continuous current per channel
Short circuit protection with thermal shutdown
Thermally isolated channels
Soft-start circuit
Fault status flag with 3ms filter eliminates false
assertions
UVLO (Undervoltage lockout)
Reverse current flow blocking (no “body diode”)
Circuit breaker mode (MIC2076A)
Pin compatible with the MIC2026/2076
Logic-compatible inputs
Low quiescent current
Applications
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USB peripherals
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General purpose power switching
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ACPI power distribution
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Notebook PCs
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PDAs
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PC card hot swap
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Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2009
M9999-072309-B
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
