MIC2549A Series

Adjustable 3A Single High-Side Current Limit Power Switch

Catalog

Adjustable 3A Single High-Side Current Limit Power Switch

Part	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output (Max) [Max]	Mounting Type	Output Type	Number of Outputs	Input Type	Package / Case	Package / Case	Package / Case	Features	Fault Protection	Switch Type	Output Configuration	Interface	Ratio - Input:Output [custom]	Supplier Device Package	Voltage - Load [Max]	Voltage - Load [Min]	Rds On (Typ)	Package / Case [y]	Package / Case [x]	Package / Case [custom]	Package / Case [custom]
Microchip Technology MIC2549A-1YN	85 °C	-40 °C	3 A	Through Hole	N-Channel	1	Non-Inverting	0.3 in	8-DIP	7.62 mm	Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	8-PDIP	5.5 V	2.7 V	35 mOhm
Microchip Technology MIC2549A-2BM	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		8-SOIC		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	8-SOIC	5.5 V	2.7 V	35 mOhm	3.9 mm	0.154 in
Microchip Technology MIC2549A-2BM-TR	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		8-SOIC		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	8-SOIC	5.5 V	2.7 V	35 mOhm	3.9 mm	0.154 in
Microchip Technology MIC2549A-1YTS-TR	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		14-TSSOP		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	14-TSSOP	5.5 V	2.7 V	35 mOhm			0.173 "	4.4 mm
Microchip Technology MIC2549A-2YTS	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		14-TSSOP		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	14-TSSOP	5.5 V	2.7 V	35 mOhm			0.173 "	4.4 mm
Microchip Technology MIC2549A-1YM-TR	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		8-SOIC		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	8-SOIC	5.5 V	2.7 V	35 mOhm	3.9 mm	0.154 in
Microchip Technology MIC2549A-1YTS	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		14-TSSOP		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	14-TSSOP	5.5 V	2.7 V	35 mOhm			0.173 "	4.4 mm
Microchip Technology MIC2549A-2YM-TR	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		8-SOIC		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	8-SOIC	5.5 V	2.7 V	35 mOhm	3.9 mm	0.154 in
Microchip Technology MIC2549A-2BTS-TR	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		14-TSSOP		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	14-TSSOP	5.5 V	2.7 V	35 mOhm			0.173 "	4.4 mm
Microchip Technology MIC2549A-1BTS	85 °C	-40 °C	3 A	Surface Mount	N-Channel	1	Non-Inverting		14-TSSOP		Slew Rate Controlled Status Flag	Current Limiting (Adjustable) Over Temperature Reverse Current	USB Switch	High Side	On/Off	1:1	14-TSSOP	5.5 V	2.7 V	35 mOhm			0.173 "	4.4 mm

Catalog

Adjustable 3A Single High-Side Current Limit Power Switch

Key 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

• + 50mO 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

• + UL recognized and EN/IEC 60950-1 (CB) Certified

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.