Datasheet > MIC1344

MIC1344

更新时间： 2024-11-30 01:21:23

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
17页	1604K
描述
Smart, 3A, Two-Channel, Power ORing Switch

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MIC1344 数据手册

MIC1344

Smart, 3A, Two-Channel, Power

ORing Switch

General Description

Features

The MIC1344 is an advanced two input, one output, hot

swappable, power multiplexer. It has both automatic and

manual input selection (ENA and ENB) and four status

outputs.

• Two input, one output, power ORing switch

• Input voltage operating range: 2.8V to 5.5V

• Automatic and manual input selection modes

• Four digital and two analog status outputs

• Current blocking: output-to-input and input-to-input

• Low on-resistance (70mΩ typical)

• Up to 3A current handling

• Low standby channel current (11µA typical)

• Separate current limiting and readback for each channel

In automatic mode, the MIC1344 will automatically connect

the higher of two input voltages (INA or INB), to the output

(OUT). In manual mode, either of the two inputs can be

routed to the output, or both power inputs can be turned off

so that multiple MIC1344’s can be used for more than two

power inputs.

The MIC1344 has four digital open drain status outputs.

The ASEL\ and BSEL\ outputs indicate which input is

selected. The STAOK and STBOK outputs indicate the

general health of the input channels. Specifically, these

outputs will be inactive (high) if the channel has sufficient

input voltage, the channel current is within acceptable

limits, the die temperature is not too hot, and the channel

has no reverse current detected.

• Available in 12-pin, 2mm × 2mm, QFN (FTQFN)

package

• Thermal-shutdown protection

• −40°C to 125°C junction temperature range

Applications

• Two input to one output power selector

• Multiple inputs to a single output power selector

• Charger input power selector

• Dual battery selector

• Main and backup power selector

• USB power selector

The current limit for each input channel of the MIC1344

can be individually set up to 3A, by two external current-

limit set resistors (ILIMA and ILMIB). The current flowing in

each of the channels can be read by measuring the

voltage at these resistors.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

• Portable products

• Supercapacitor ORing

• Backup battery diode ORing

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

April 24, 2015 Revision 1.0

12 3 4 5 6 7...17

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与MIC1344相关器件

型号	品牌	获取价格	描述	数据表
MIC1344YFT	MICREL	获取价格	Smart, 3A, Two-Channel, Power ORing Switch
MIC1426	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1426CM	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1426CMT&R	MICREL	获取价格	Buffer/Inverter Based MOSFET Driver, 1.5A, BICMOS, PDSO8, 0.150 INCH, SOIC-8
MIC1426CN	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1427	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1427CM	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1427CN	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1428	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver
MIC1428CM	MICREL	获取价格	Dual 1.2A-Peak Low-Side MOSFET Driver

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