Intersil Corporation HIP1011 Datasheet

HIP1011

Data Sheet August 1999 File Number 4311.7

PCI Hot Plug Controller

The HIP1011 is the PCI Hot Plug voltage bus control IC f or
use in modern computer systems that facilitates hot plugging
of adapter cards into and out of an active or passive back
plane. Along with discrete power MOSFETs and a few
passivecomponents, the HIP1011 creates a small and simple
yet complete power control solution. F our independent
supplies are controlled, +5V, +3.3, +12V, and -12V. The +12V
and -12V switches are integrated. F or the +5V and +3.3V
supplies, overcurrent protection is provided by sensing the
voltage across external current-sense resistors. For the +12V
and -12V supplies, overcurrent protection is provided
internally . In addition, an on-chip reference is used to monitor
the +5V, +3.3V and +12V outputs for undervoltage conditions.
The PWRON input controls the state of the switches. During
an overcurrent condition on any output, or an undervoltage
condition on the +5V, +3.3V or +12V outputs, all MOSFETs
are immediately latched-off and a LOW (0V) is asserted on
the FLTN output. The FLTNlatchiscleared when the PWRON
input is toggled low again. During initial power-up of the main

supply (+12V), the PWRON input is inhibited from

V

CC

turning on the switches, and the latch is held in the Reset
state until the V

input is greater than 10V.

CC

User programmability of the overcurrent threshold and turn-on
slew rate is provided. A resistor connected to the OCSET pin
programs the overcurrent threshold. Capacitors connected to
the gate pins set the turn-on rate. Also, a capacitor may be
added to the FLTN pin to provide noise immunity.

Ordering Information

TEMP.

PART NUMBER

HIP1011CB 0 to 70 16 Ld SOIC M16.15
HIP1011CB-T 0 to 70 Tape and Reel

RANGE (oC) PACKAGE

PKG.

NO.

Features

• Controls Distribution of Four Supplies: +5V, +3.3V, +12V,
and -12V

• Internal MOSFET Switches for +12V and -12V Outputs

• Microprocessor Interface for On/Off Control and Fault
Reporting

• Adjustable Overcurrent Protection for All Supplies

• Provides Fault Isolation

• Adjustable Turn-On Slew Rate

• Minimum Parts Count Solution

• No Charge Pump

Applications

• PCI Hot Plug

• CompactPCI

Pinout

HIP1011

(SOIC)

TOP VIEW

M12VIN

FLTN

3V5VG

V

CC

12VIN

3VISEN

3VS

OCSET

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10
9

M12VO
M12VG
12VG
GND
12VO
5VISEN
5VS
PWRON

Typical Application

3.3V INPUT

-12V INPUT

12V INPUT

POWER CONTROL INPUT

2-1

3.3V,

7.6A OUT 0.5A OUT 0.1A OUT 5A OUT

5mΩ, 1%

6.04kΩ

1%

FAULT OUTPUT (ACTIVE LOW)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

12V,

HIP1011

M12VIN
FLTN
3V5VG
V

CC

12VIN
3VISEN
3VS
OCSET

(OPTIONAL)

M12VO
M12VG

12VG

GND

12VO

5VISEN

5VS

PWRON

1-888-INTERSIL or 321-724-7143

5V,-12V,

5mΩ, 1%

0.033µF

0.033µF

NOTE:

1. All capacitors are ±10%.

5V INPUT

HUF761315K8

0.033µF

| Copyright © Intersil Corporation 1999

Simplified Schematic

V

CC

V

CC

SET (LOW = FAULT)

HIP1011

RESET

5VREF

COMP

FAULT LATCH

+

-

V

OCSET

LOW = FAULT

COMP

COMP

COMP

/17

-

+

-

+

INHIBIT

-

+

INHIBIT

-

+

INHIBIT

V

CC

FLTN

4.6V

2.9V

10.8V

5VS

100µA

OCSET

PWRON

V

CC

5V ZENER

REFERENCE

V

CC

12VIN

POWER-ON

RESET

V

CC

V

V

OCSET

CC

5VREF

LOW WHEN V

CC

< 10V

HIGH =
FAULT

V

OCSET

COMP

+

-

V

COMP

OCSET

-

+

-

HIGH = SWITCHES ON

3V5VG

5VISEN

/13.3

-

+

/0.8

+

V

CC

0.3Ω

3VS

3VISEN

12VIN

12VG

12VO

GND

2-2

COMP

V

/3.3

OCSET

+

-

+

-

M12VIN

0.7Ω

M12VIN

M12VG

M12VO

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 start-

up ramp. During turn on, this capacitor is charged with a 25µA 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

(6.04kΩ, 1%) is compatible with the maximum allowable currents as outlined in the PCI specifi-

cation.
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 Connectto the load side of the current senseresistorinserieswithsourceof 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

PMOS

15 M12VG Gate of Internal

NMOS

16 M12VO Switched -12V

Output

Connect a capacitor between 12VG and 12VO to set the start up ramp for the +12V supply.

This capacitor is charged with a 25µA current source during start -up. 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 start up.

Connectacapacitorbetween M12VG andM12VOto set the startupramp for the M12Vsupply.

This capacitor is charged with 25µA during start up.

Switched 12V Output.

2-3