參數(shù)資料
型號(hào): MIC2545A
廠商: Micrel Semiconductor,Inc.
英文描述: Programmable Current Limit High-Side Switch(可編程 限流高邊開(kāi)關(guān))
中文描述: 可編程電流限制高邊開(kāi)關(guān)(可編程限流高邊開(kāi)關(guān))
文件頁(yè)數(shù): 1/16頁(yè)
文件大?。?/td> 124K
代理商: MIC2545A
June 2000
1
MIC2545A/2549A
MIC2545A/2549A
Micrel
MIC2545A/2549A
Programmable Current Limit High-Side Switch
Preliminary Information
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 re-
quires few external components to satisfy USB and ACPI
requirements.
Load current management features include a precision resis-
tor-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, pro-
tects the switch and the attached device.
The MIC2545A/49A’s open-drain flag output is used to indi-
cate 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.
Typical Application
EN
FLG
GND
ILIM
OUT
IN
OUT
IN
MIC2545A
On/Off
Peripheral
0.1μF
R
SET
+5V
10k
33μF
Typical Advanced Configuration and Power Interface (ACPI) Application
Features
2.7V to 5.5V input
Adjustable current-limit up to 3A
Reverse current flow blocking
90
μ
A typical on-state supply current
1
μ
A 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
Applications
USB power distribution
PCI Bus Power Switching
Notebook PC
ACPI power distribution
PC card hot swap applications
Inrush current-limiting
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
相關(guān)PDF資料
PDF描述
MIC2557 PCMCIA Card Socket VPP Switching Matrix
MIC2557BM Replaced by PT6501 :
MIC2557BMT&R PCMCIA Card Socket VPP Switching Matrix
MIC2558 PCMCIA Dual Card Socket VPP Switching Matrix
MIC2559 Replaced by PT6502 :
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參數(shù)描述
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MIC2545A-1BMTR 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel
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