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MIC2044

Micrel Semiconductor
Part Number MIC2044
Manufacturer Micrel Semiconductor
Description Protected Power Distribution Switch
Published Oct 6, 2008
Detailed Description MIC2044/2045 Micrel MIC2044/2045 Single Channel, High Current, Low Voltage, Protected Power Distribution Switch Genera...
Datasheet PDF File MIC2044 PDF File

MIC2044
MIC2044

Overview
MIC2044/2045 Micrel MIC2044/2045 Single Channel, High Current, Low Voltage, Protected Power Distribution Switch General Description The MIC2044 and MIC2045 are high-side MOSFET switches optimized for general purpose power distribution applications that require circuit protection.
These devices switch up to 5.
5V and as low as 0.
8V while offering both programmable current limiting and thermal shutdown to protect the device and the load.
A fault status output is provided to indicate overcurrent and thermal shutdown fault conditions.
Both devices employ soft-start circuitry to minimize the inrush current in applications that employ highly capacitive loads.
Additionally, for tighter control over inrush current during start up, the output slew-rate may be adjusted by an external capacitor.
The MIC2045 features a auto-reset circuit breaker that latches the output OFF upon detecting an overcurrent condition lasting more than 32ms.
The output is reset by removing or reducing the load.
Data sheets and support documentation can be found on Micrel’s web site at www.
micrel.
com.
Features • 30mΩ maximum on-resistance • 0.
8V to 5.
5V operating range • Adjustable current limit • Up to 6A continuous output current • Short circuit protection • Very fast reaction to short circuits • Thermal shutdown • Adjustable slew-rate control • Circuit breaker mode (MIC2045) • Fault status flag • Power-Good detection • Undervoltage lockout • No reverse current flow through the switching MOSFET when OFF or disabled • Low quiescent current Applications • Docking stations • LAN servers • WAN switches • Hot swap board insertions • Notebook PCs • PDAs • Base stations • RAID controllers • USB hosts Typical Application +3.
3V Power Supply OUT1 OUT2 4.
7CmF3 IN LogicON/OFF Controller OVERCURRENT 0.
1CmF1 20RkW1 0.
022Cm4F* 0.
1CmF2 MIC2044-1BTS 8 VBIAS 7, 11, 13, 16 VIN VOUT 9,12,14 PGREF 15 2 EN 3 /FAULT R4 20kW 4 SLEW PWRGD 1 R2924kW 1% R243.
3kW 1% m CLOAD 33 F VOUT 3.
3V@ 3.
5A MIC39100-2.
5...


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