MIC2090_11 Datasheet, PDF (2/23 Pages) Micrel Semiconductor – Current Limiting Power Distribution Switches

Micrel, Inc.
Ordering Information
Part Number
MIC2090-1YM5
MIC2091-1YM5
MIC2090-2YM5
MIC2091-2YM5
Marking
L1K
M1K
L2K
M2K
Current
Limit
50mA
100mA
50mA
100mA
Current-Limit
Recovery
Auto-Retry
Auto-Retry
Latch-Off
Latch-Off
Junction Temperature
Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Pin Configuration
MIC2090/MIC2091
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
5-Pin SOT-23 (M5)
Pin Description
Pin Number
Pin Name
1
VIN
2
GND
3
EN
4
FAULT/
5
VOUT
Pin Function
Supply (Input): +1.8V to +5.5V. Provides power to the output switch and the MIC2090/MIC2091
internal control circuitry.
Ground.
Enable (Input): Active-high TTL compatible control input. A high signal turns on the internal
switch and supplies power to the load. This pin cannot be left floating.
Fault Status (Output): Open drain output. Can be connected to other open drain outputs. Must
be pulled high with an external resistor.
When EN=0, FAULT/ pin is high
When EN=1, a low on the FAULT/ pin indicates one or more of the following conditions:
1. The part is in current limit and is turned off.
2. The part is in thermal limit and is turned off.
3. The part is in UVLO
Switched Output (Output): The voltage on this pin is controlled by the internal switch. Connect
the load driven by the MIC2090/MIC2091 to this pin.
July 2011
2
M9999-070611-B