hip1011a Intersil Corporation, hip1011a Datasheet - Page 3

• Manufacturer Part Number: hip1011a
• Description: Pci Hot Plug Controller
• Manufacturer: Intersil Corporation

Pin Descriptions
PIN NO.
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
DESIGNATOR
PWRON
M12VIN
3VISEN
5VISEN
OCSET
M12VG
M12VO
3V5VG
12VIN
FLTN
12VO
12VG
GND
VCC
3VS
5VS
Gate of Internal PMOS Connect a capacitor between 12VG and 12VO to set the start up ramp for the +12V supply.
Gate of Internal NMOS Connect a capacitor between M12VG and M12VO to set the start up ramp for the M12V
Switched 12V Output
3.3V/5V Gate Output
3.3V Current Sense
Power On Control
5V Current Sense
Overcurrent Set
12V V
Switched -12V
3
Fault Output
3.3V Source
FUNCTION
5V Source
-12V Input
12V Input
Ground
Output
CC
Input
-12V Supply Input. Also provides power to the -12V overcurrent circuitry.
5V CMOS Fault Output; LOW = FAULT. A capacitor may be placed from this pin to ground to
provide delay time to fault notification and power supply latch-off.
Drive the gates of the 3.3V and 5V MOSFETs. Connect a capacitor to ground to set the start-
up ramp. During turn on, this capacitor is charged with a 25PA current source.
Connect to unswitched 12V supply.
Switched 12V supply input.
Connect to the load side of the current sense resistor in series with source of external 3.3V
MOSFET.
Connect to source of 3.3V MOSFET. This connection along with pin 6 (3VISEN) senses the
voltage drop across the sense resistor.
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.
Controls all four switches. High to turn switches ON, Low to turn them OFF.
Connect to source of 5V MOSFET switch. This connection along with pin 11 (5VISEN)
senses the voltage drop across the sense resistor.
Connect to the load side of the current sense resistor in series with source of external 5V
MOSFET.
Switched 12V output.
Connect to common of power supplies.
This capacitor is charged with a 25PA current source during start-up. The 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 start up.
supply. This capacitor is charged with 25PA during start up.
Switched 12V Output.
HIP1011A
DESCRIPTION
November 16, 2004
FN4631.5