–2–

REV.

PrN 1/02

ADM1014–SPECIFICATIONS

Parameter

Min

Typ

Max

Units

Test Conditions/Comments

5V/ 3.3V SUPPLY CONTROL

5V Overcurrent Threshold

-

8

-

A

See Typical Application Diagram

5V Overcurrent Threshold Voltage

33

42

50

mV

5V Overcurrent Threshold Voltage

70

80

90

mV

5V Undervoltage Trip Threshold

4.42

4.65

4.7

V

5V Undervoltage Fault Response Time

-

110

160

ns

5V Turn-On Time

-

9.75

-

ms

(PWRON High to 5VOUT = 4.75V)

3V Overcurrent Threshold

-

10

-

A

See Typical Application Diagram

3V Overcurrent Threshold Voltage

41

52

62

mV

OCSET = 0.6V

3V Overcurrent Threshold Voltage

89

98

108

mV

OCSET = 1.2V

3V Undervoltage Trip Threshold

2.74

2.86

2.9

V

3V Undervoltage Fault Response Time

-

110

160

ns

3V5VG Undervoltage Enable Threshold

-

9.6

-

V

Voltage

3V Turn-On Time

-

9.75

-

ms

(PWRON High to 3VOUT = 3.00V)

3V5VG Vout High

11.5

11.8

-

V

PWRON = High, FLTN = High

Gate Output Charge Current

19

25.0

29

µA

Gate Turn-On Time

-

280

-

µs

(PWRON High to 3V5VG = 11V)

Gate Turn-Off Time

-

2

-

µs

+12V SUPPLY CONTROL

On Resistance of Internal PMOS

-

0.3

0.35

On Resistance of Internal PMOS

-

0.35

0.5

Overcurrent Threshold

0.6

0.75

0.9

A

Overcurrent Threshold

1.25

1.50

1.8

A

12V Undervoltage Trip Threshold

10.25

10.6

10.8

V

Undervoltage Fault Response Time

-

110

-

ns

FEATURES

Controls Two PCI Slots

Controls all Four PCI Supplies, +3.3V, +5V, +12V,

-12V, plus 3.3V auxiliary supply

Internal MOSFET Switches for +3.3V AUX, +12V

and –12V outputs

Adjustable Overcurrent Protection for all Outputs

Undervoltage Protection on +3.3V, +5V, +12V and

+3.3V AUX Supplies

Open-Drain Fault Output with Adjustable Delay

Logic Control of Outputs

Adjustable Soft-start

APPLICATIONS

Compact PCI

GENERAL DESCRIPTION

The ADM1014 is a dual PCI voltage bus controller that allows

hot-plugging of adapter cards into and out of an active or pas-

sive backplane. The device requires only four external power

MOSFETs and a few discrete components for a complete

power-control solution for two PCI slots.

The ADM1014 operates from a +12V and +3.3V AUX supply

and controls five independent supplies (+3.3V, +3.3VAUX,

+5V, +12V and –12V) on two separate channels (A and B).

The power switches for the +3.3VAUX, +12V and –12V

supplies are integrated onto the chip, and internal current

limiting is provided. For the +3.3V and +5V supplies, the

device drives external, N-channel, power MOSFETs, and

provides overcurrent protection by sensing the voltage drop

across external current-sense resistors.

The current limits for all 10 supplies are set by a single resistor

to GND, connected to the OCSET pin.

Undervoltage sensing is provided on the +3.3V, +5V, +12V

and +3.3VAux supplies. Overcurrent sensing is provided on all

supplies. In the event of an overcurrent or undervoltage fault on

any of the outputs of either channel, all outputs on that channel

will be turned off.

Turn-on slew rate may be controlled using eight external

capacitors, connected to the gate drives of all of the supplies.

Logic control of the four main outputs is provided by the

PWRONA and PWRONB pins. When these pins are high, the

outputs are turned on, when low, the outputs are turned off.

The +3.3VAUX supplies have their own control inputs,

PAUXA and PAUXB.