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MIC2545A-2YM

Description
USB Power Switch Single 5.5V 0.5A to 3A 8-Pin SOIC N Tube
File Size684KB,18 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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MIC2545A-2YM Overview

USB Power Switch Single 5.5V 0.5A to 3A 8-Pin SOIC N Tube

MIC2545A-2YM Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeUSB Power Switch
Number of Switches1
Current Limit (A)0.5 to 3
Enable LogicActive Low
Minimum Input Voltage (V)2.7
Maximum Input Voltage (V)5.5
Number of Outputs2
Minimum Output Current (A)0.5
Output Voltage Range (V)7(Max)
Supply Current (mA)0.09
Operating Supply Voltage Range (V)2.7 to 5.5
Switch On Resistance (MOhm)35
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Typical Turn-On Delay Time (us)2000
Typical Turn-Off Delay Time (us)25
Typical Rise Time (us)1800
Typical Fall Time (us)23
PackagingTube
Pin Count8
Standard Package NameSOP
Supplier PackageSOIC N
MountingSurface Mount
Package Height1.48
Package Length4.93
Package Width3.94
PCB changed8
Lead ShapeGull-wing
MIC2545A/2549A
Programmable Current-Limit
High-Side Switch
General Description
The MIC2545A and MIC2549A are integrated high-side
power switches optimized for low-loss DC power switching
and other power-management applications, including
advanced configuration and power interface (ACPI). The
MIC2545A/49A is a cost-effective, highly-integrated
solution that requires few external components to satisfy
USB and ACPI requirements.
Load current management features include a precision,
resistor-programmable output current-limit and a soft-start
circuit, which minimizes inrush current when the switch is
enabled. Thermal shutdown, along with adjustable current-
limit, protects the switch and the attached device.
The MIC2545A/49A’s open-drain flag output is used to
indicate current-limiting or thermal shutdown to a local
controller. The MIC2549A has an additional internal latch
which turns the output off upon thermal shutdown,
providing robust fault control. The enable signal is
compatible with both 3V and 5V logic, and is also used as
the thermal shutdown latch reset for the MIC2549A.
The MIC2545A and MIC2549A are available in active-high
and active-low enable versions in 8-pin DIP, SOIC, and
TSSOP packages.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
2.7V to 5.5V input
Adjustable current-limit up to 3A
Reverse current flow blocking
90µA typical on-state supply current
1µA typical off-state supply current
50mΩ maximum on-resistance
Open-drain fault flag
Thermal shutdown
Thermal-shutdown output latch (MIC2549A)
2ms (slow) soft-start turn-on, fast turnoff
Available with active-high or active-low enable
Applications
USB power distribution
PCI Bus Power Switching
Notebook PC
ACPI power distribution
PC card hot swap applications
Inrush current-limiting
_________________________________________________________________________________________________________________________
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
June 2011
M9999-062711-A
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