HIP1011 データシートの表示（PDF） - Renesas Electronics

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HIP1011

PCI Hot Plug Controller

Renesas Electronics 

HIP1011

Pin Descriptions

PIN DESIGNATOR

FUNCTION

DESCRIPTION

1

M12VIN

-12V Input

-12V Supply Input. Also provides power to the -12V overcurrent circuitry.

2

FLTN

Fault Output

5V CMOS Fault Output; LOW = FAULT. An optional capacitor may be place from this pin to

ground to provide additional immunity from power supply glitches.

3

3V5VG

3.3V/5V Gate Output Drive the gates of the 3.3V and 5V MOSFETs. Connect a capacitor to ground to set the startup

ramp. During turn on, this capacitor is charged with a 25A current source.

4

VCC

12V VCC Input Connect to unswitched 12V supply.

5

12VIN

12V Input

Switched 12V supply input.

6

3VISEN

3.3V Current Sense Connect to the load side of the current sense resistor in series with source of external 3.3V

MOSFET.

7

3VS

3.3V Source

Connect to source of 3.3V MOSFET. This connection along with pin 6 (3VISEN) senses the

voltage drop across the sense resistor.

8

OCSET

Overcurrent Set Connect a resistor from this pin to ground to set the overcurrent trip point of all four switches. All

four over current trips can be programmed by changing the value of this resistor. The default

(6.04k 1%) is compatible with the maximum allowable currents as outlined in the PCI

specification.

9

PWRON

Power On Control Controls all four switches. High to Turn Switches ON, Low to turn them OFF.

10

5VS

5V Source

Connect to source of 5V MOSFET switch. This connection along with pin 11(5VISEN) senses

the voltage drop across the sense resistor.

11

5VISEN

5V Current Sense Connect to the load side of the current sense resistor in series with source of external 5V MOSFET.

12

12VO

Switched 12V Output Switched 12V output.

13

GND

Ground

Connect to common of power supplies.

14

12VG

Gate of Internal Connect a capacitor between 12VG and 12VO to set the startup ramp for the +12V supply. This

PMOS

capacitor is charged with a 25A current source during startup. The 3.3V and 5V UV circuitry

is enabled after the voltage on 12VG is less than 400mV. Therefore, if the capacitor on the pin

3 (3V5VG) is more than 25% larger than the capacitor on pin 14 (12VG) a false UV may be

detected during startup.

15

M12VG

Gate of Internal Connect a capacitor between M12VG and M12VO to set the startup ramp for the M12V supply.

NMOS

This capacitor is charged with 25A during startup.

16

M12VO

Switched -12V

Output

Switched 12V Output.

FN4311 Rev 9.00

March 2004

Page 4 of 8

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