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Part Number: MIC2549A
Description: The MIC2545A and MIC2549A are integrated high-side power switches optimized for low loss dc power swit...
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MIC2549A
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DataSheet
General Description
MIC2549A 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 o utput 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.
MIC2549A Maximum Ratings
Supply Voltage (VIN) ..................................................+6.0V
Output Voltage (VOUT) ...............................................+6.0V
Output Current (IOUT) ............................... Internally Limited
Enable Input (VEN) ......................................... 0.3V to +6V
Fault Flag Voltage (VFLG) ...........................................+6.0V
Fault Flag Current (IFLG) ............................................50mA
Storage Temperature (TS) ....................65°C to +150°C
Junction Temperature (TJ) ...................... Internally Limited
Lead Temperature (soldering 5 sec.) ...................... 260°C
ESD Rating, Note 3 ..................................................2000V
Operating Ratings (Note 2)
Supply Voltage (VIN) ................................... +2.7V to +5.5V
Ambient Temperature Range (TA) ..........40°C to +85°C
Package Thermal Resistance
PDIP (JA) .........................................................130°C/W
SOIC (JA) ......................................................... 160°C/W
TSSOP (JA), Note 6 ........................................100°C/W
Current Limit Set Range, Note 5........................ 0.5A to 3A
Output Voltage (VOUT) ...............................................+6.0V
Output Current (IOUT) ............................... Internally Limited
Enable Input (VEN) ......................................... 0.3V to +6V
Fault Flag Voltage (VFLG) ...........................................+6.0V
Fault Flag Current (IFLG) ............................................50mA
Storage Temperature (TS) ....................65°C to +150°C
Junction Temperature (TJ) ...................... Internally Limited
Lead Temperature (soldering 5 sec.) ...................... 260°C
ESD Rating, Note 3 ..................................................2000V
Operating Ratings (Note 2)
Supply Voltage (VIN) ................................... +2.7V to +5.5V
Ambient Temperature Range (TA) ..........40°C to +85°C
Package Thermal Resistance
PDIP (JA) .........................................................130°C/W
SOIC (JA) ......................................................... 160°C/W
TSSOP (JA), Note 6 ........................................100°C/W
Current Limit Set Range, Note 5........................ 0.5A to 3A
MIC2549A Features
• 2.7V to 5.5V input
• Adjustable current-limit up to 3A
• Reverse current flow blocking
• 90A typical on-state supply current
• 1A typical off-state supply current
• 50m 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
• Adjustable current-limit up to 3A
• Reverse current flow blocking
• 90A typical on-state supply current
• 1A typical off-state supply current
• 50m 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
MIC2549A Typical Application
• USB power distribution
• PCI Bus Power Switching
• Notebook PC
• ACPI power distribution
• PC card hot swap applications
• Inrush current-limiting
• PCI Bus Power Switching
• Notebook PC
• ACPI power distribution
• PC card hot swap applications
• Inrush current-limiting
MIC2549A Connection Diagram
MIC2549A-1BM
PDF/DataSheet Download
- Datasheet: MIC2549A-1BM
- File Size: 295675 KB
- Manufacturer: MICREL [Micrel Semiconductor]
- Click here to Download
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MIC2549A Relative Products
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