MIC2548-2BM TR Micrel Inc, MIC2548-2BM TR Datasheet

IC SW CURR LIMIT HI SIDE 8-SOP

MIC2548-2BM TR

Manufacturer Part Number
MIC2548-2BM TR
Description
IC SW CURR LIMIT HI SIDE 8-SOP
Manufacturer
Micrel Inc
Type
High Sider
Datasheet

Specifications of MIC2548-2BM TR

Input Type
Non-Inverting
Number Of Outputs
1
On-state Resistance
80 mOhm
Current - Peak Output
1.5A
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output / Channel
-
Other names
MIC2548-2BMTR
MIC2548-2BMTR
General Description
The MIC2544 and MIC2548 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 MIC2544/48 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 current-limit,
protects the switch and the attached device.
The MIC2544/48’s open-drain flag output is used to
indicate current-limiting or thermal shutdown to a local
controller. The MIC2548 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 MIC2548.
The MIC2544 and MIC2548 are available in active-high
and active-low enable versions in the 8-pin SOIC
(small-outline integrated circuit) and 8-pin MSOP (micro-
small-outline package).
_________________________________________________________________________________________________________
Typical Application
April 2010
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Typical Advanced Configuration and Power Interface (ACPI) Application
Features
• 2.7V to 5.5V input
• Adjustable current-limit up to 1.5A
• Reverse current flow blocking (no “body diode”)
• 75μA typical on-state supply current
• 1μA typical off-state supply current
• 120mΩ maximum on-resistance
• Open-drain fault flag
• Thermal shutdown
• Thermal shutdown output latch (MIC2548)
• 2ms (slow) turn-on and 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
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Programmable Current Limit
MIC2544/2548
High-Side Switch
M9999-043010

Related parts for MIC2548-2BM TR

MIC2548-2BM TR Summary of contents

Page 1

... The enable signal is compatible with both 3V and 5V logic, and is also used as the thermal shutdown latch reset for the MIC2548. The MIC2544 and MIC2548 are available in active-high and active-low enable versions in the 8-pin SOIC (small-outline integrated circuit) and 8-pin MSOP (micro- small-outline package) ...

Page 2

... MIC2544-2YMM Active Low MIC2548-1BM Active High MIC2548-1BMM Active High MIC2548-2BM Active Low MIC2548-2BMM Active Low MIC2548-1YM Active High MIC2548-1YMM Active High MIC2548-2YM Active Low MIC2548-2YMM Active Low *Thermal Shutdown Latch April 2010 Latch* Temperature Range -40°C to +85°C -40°C to +85°C -40° ...

Page 3

... High input >1.7V typical; low input <1.5V typical. Do not float. MIC2548 only: Also resets thermal shutdown latch. Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent FLG or thermal shutdown conditions. MIC2548 only: latched low on thermal shutdown. GND Ground. Current Limit: Sets current-limit threshold using an external resistor, R ILIM connected to ground. 154Ω ...

Page 4

... Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 4. Off is ≤0.8V and on is ≥2.4V for the MIC2544-1 and MIC2548-1. Off is ≥2.4V and on is ≤0.8V for the MIC2544-2 and MIC2548-2. The enable input has about 200mV of hysteresis. ...

Page 5

Micrel, Inc. Test Circuit Timing Diagrams April 2010 Functional Characteristics Test Circuit Figure 1a. MIC2544/48-1 Figure 1b. MIC2544/48-2 5 MIC2544/2548 M9999-043010 ...

Page 6

... Micrel, Inc. Timing Diagrams continued Figure 2a. MIC2548-2 Timing: Output is reset by toggling EN April 2010 Figure 2b. MIC2544-2 Timing 6 MIC2544/2548 M9999-043010 ...

Page 7

Micrel, Inc. Typical Characteristics April 2010 7 MIC2544/2548 M9999-043010 ...

Page 8

Micrel, Inc. Typical Characteristics continued April 2010 8 MIC2544/2548 M9999-043010 ...

Page 9

Micrel, Inc. Functional Characteristics April 2010 9 MIC2544/2548 M9999-043010 ...

Page 10

Micrel, Inc. Block Diagram April 2010 10 MIC2544/2548 M9999-043010 ...

Page 11

... Overtemperature detection functions only when the switch is enabled. The MIC2548 features an internal latch which causes the part to remain off after thermal shutdown until a reset pulse is provided via the enable pin (pin 1). While in current-limit, the thermal shutdown latch prevents on/off cycling of the output ...

Page 12

... Micrel, Inc. Application Information Supply Filtering A 0.1μF to 1μF bypass capacitor from IN to GND, located near the MIC2544 and MIC2548, is strongly recommended to control supply transients. Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry ...

Page 13

Micrel, Inc. April 2010 Figure 5. Hot Plug Application 13 MIC2544/2548 M9999-043010 ...

Page 14

Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...

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