HIP1020CK-T【PDF 6/6 页】IC CTRLR HOT PLUG SOT23-5

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All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.

Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reli-

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its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see web site http://www.intersil.com

Special Applications

The HIP1020 is well suited to work with N-Channel

MOSFETs controlling voltages other than 12V, 5V, or 3.3V

provided three basic constraints are observed. The first

constraint is that the bias voltage for the HIP1020 is either

12V or 5V. Chip operation at voltages significantly below 5V

is not possible, while a bias voltage very much above 12V

can unnecessarily stress the part. Operation between 5V

and 12V can confuse the chip as it tries to determine

whether to operate as a voltage doubler or voltage tripler.

The final two constraints have to do with proper operation of

the power MOSFETs. These constraints assume that a rail

voltage, V

RAIL

, is to be switched using an N-Channel power

MOSFET having a gate-to-source breakdown voltage of V

and a threshold voltage of V

GATE

can be either V

HGATE

or V

LGATE

depending on

which pin is connected to the power MOSFET and will be

selected based on which gate voltage is most appropriate for

the application. The requirement in Equation 2 is necessary

to assure that the power MOSFET is fully enhanced. V

should be the maximum data-sheet value needed to assure

adequately low r

DSON

. The requirement in Equation 3

assures that the power MOSFET is protected from

breakdown of the gate oxide.

GATE

RAIL

(EQ. 2)

GATE

RAIL

(EQ. 3)

HIP1020

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