HIP1020CK-T【PDF 2/6 页】IC CTRLR HOT PLUG SOT23-5

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Sheet目录40

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Pin Descriptions

SYMBOL

FUNCTION

DESCRIPTION

VCC

Bias Supply

Connect this pin to either a 12V or a 5V source. The HIP1020 detects the bias-voltage level at

pin 1 and decides whether to operate as a voltage-doubler or a voltage-tripler. Consequently,

it is not recommended to operate with bias voltages between 5V (?0%) and 12V (?0%). In

the absence of an enable signal at pin 5, the current into pin 1 is less than 1礎. It is necessary

for voltage to be present at pin 1 prior to applying an enable signal at pin 5.

GND

Ground

Connect to the negative rail of the supply that is connected to pin 1.

LGATE

Gate Driver for the 5V

and/or 3.3V

MOSFET(s)

When VCC = 12V, connect this pin to the gate(s) of the 5V and/or 3.3V MOSFETs. When VCC

= 5V, connect this pin to the gate of a 3.3V MOSFET. Upon a rising edge on EN (pin 5), the

voltage on this pin will ramp linearly to ~16V when VCC = 12V and ~12V when VCC = 5V. An

internal dv/dt activated clamp shunts coupled noise to ground preventing unintended turn on at

either output. The internal dv/dt-activated clamp also protects pin 5.

HGATE

12V or 5V MOSFET

Gate Driver

When VCC = 12V, connect this pin to the gate of the 12V MOSFET. When VCC = 5V, connect

this pin to the gate of the 5V MOSFET. Upon a rising edge on EN (pin 5), the voltage on this

pin will ramp linearly to ~22V when VCC = 12V and ~13V when VCC = 5V.

Enable

Connect a TTL or 3.3V logic signal to this pin to control the outputs at pins 3 and 4. A rising

edge on pin 5 initiates the linear voltage ramps at pins 3 and 4. Be sure that the device driving

EN does not enter a high-impedance state when enabling is not desired and that its maximum

rise time does not exceed 100祍.

HIP1020

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