MIC5019 查看數據表（PDF） - Micrel

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MIC5019

Ultra-Small High-Side N-Channel MOSFET Driver with Integrated Charge Pump

Micrel 

Micrel, Inc.

A logic-level MOSFET is required. The MOSFET’s

maximum current is limited slightly because the gate is

not fully enhanced. To predict the MOSFETs

performance for any pair of supply voltages, calculate

the gate-to-source voltage and refer to the MOSFET

data sheet.

VGS = VOUT – (VLOAD SUPPLY – VDS)

VOUT is determined from the driver supply voltage using

the “Typical Characteristics: Output Voltage vs. Supply

Voltage” graph.

Low-Side Switch Configuration

The low-side configuration makes it possible to switch a

voltage much higher than the MIC5019’s maximum

supply voltage.

Figure 7. Low-Side Switch Configuration

The maximum switched voltage is limited only by the

MOSFET’s maximum drain-to-source ratings.

MIC5019

July 2012

9

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