CIRCUIT OPERATES FROM 3.3VAUX AND +12V POWER SUPPLY
CHANNEL A
3
Q
RESET
FAULT
4
32
27
LATCH
SET
Q
12VIN
A
5V
REGULATOR
12VIN
A
12V IN
POWER-ON
RESET
COMMON TO BOTH CHANNELS
LOW WHEN
12VINA <
10V
CHANNEL B
15
17
16
( IDENTICAL TO CHANNEL A )
OVERCURRENT AND
UNDERVOLTAGE
COMPARATORS
FOR +3.3VAUX
CHANNEL A
CIRCUIT OPERATES FROM 3.3VAUX POWER SUPPLY
OVERCURRENT AND
UNDERVOLTAGE
COMPARATORS
FOR +5V
OVERCURRENT AND
UNDERVOLTAGE
COMPARATORS
FOR +3.3V
OVERCURRENT AND
UNDERVOLTAGE
COMPARATORS
COMBINING
LOGIC
FOR +12V
OVERCURRENT
COMPARATOR
FOR -12V
G
P-CHANNEL
G
G
S
MOSFET
D
S
P-CHANNEL
MOSFET
D
S
N-CHANNEL
MOSFET
D
ADM1014
7
AUXGA
31
AUXINA
8
AUXOA
EXTERNAL
N-CHANNEL
POWER
MOSFETS
+5V
+3.3V
IN
3V5VGA
33
5VSA
34
35
36
2
38
1
14
26
13
25
24
23
22
21
12
28
11
18
20
19
37
9
29
10
5VISENA
3VSA
3VISENA
12VGA
12VIN
A
12VOA
-12VGA
-12VINA
-12VOA
AUXGB
AUXINB
AUXOB
3V5VGB
5VSB
5VISENB
3VSB
3VISENB
12VGB
12VINB
12VOB
-12VGB
-12VINB
-12VOB
RSENSE3A
+5V
OUTA
EXTERNAL
N-CHANNEL
MOSFETS
+5V
IN
RSENSE3B
+5V
OUTA
RSENSE5A
POWER
RSENSE5B
IN
+3.3V
OUTA
+3.3V
IN
+3.3V
OUTA
FUNCTIONAL BLOCK DIAGRAM
REV. PrN 1/02
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
TM
Hot Plug is a trademark of Core International, Inc.
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
PCI Hot-Plug
GENERAL DESCRIPTION
TM
The ADM1014 is a dual PCI voltage bus controller that allows
hot-plugging of adapter cards into and out of an active or passive 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.
(Specifications are for each channel, 3.3VAUX=AUXINA=3.3V, VCC = 12VIN = +12V, -12VIN = -12V, Nominal 3.3V and 5V supplies to external
MOSFETs, TA = 0oC to +70oC, unless otherwise noted.)
3V5VG Vout High11.511.8-VPWRON = High, FLTN = High
Gate Output Charge Current1925.029µAPWRON = High, V
Gate Turn-On Time-280-µ sC
= 0.033µF,3V5VG Rising 10% to 90%
3V5VG
3V5VG
= 4V
(PWRON High to 3V5VG = 11V)
Gate Turn-Off Time-2-µsC
= 0.033µF, 3V5VG Falling 90% to 10%
3V5VG
+12V SUPPLY CONTROL
On Resistance of Internal PMOS-0.30.35⍀PWRON = High, ID = 0.5A, TA= TJ= 25oC
On Resistance of Internal PMOS-0.350.5⍀PWRON = High, I
Overcurrent Threshold0.60.750.9AV
Overcurrent Threshold1.251.501.8AV
(Specifications are for each channel, 3.3VAUX=AUXINA=3.3V, VCC = 12VIN = +12V, -12VIN = -12V, Nominal 3.3V and 5V supplies to external
MOSFETs, TA = 0oC to +70oC, unless otherwise noted.)
ParameterMinTypMaxUnitsTest Conditions/Comments
Gate Charge Current1925.029µAPWRON = High, V 12VG = 10V
Turn-On Time-16-msC
(PWRON High to 12VG = 1V)
Turn-Off Time-4.5-µsC
-12V SUPPLY CONTROL
On Resistance of Internal NMOS-0.71⍀PWRON = High, ID = 0.1A, TA=TJ=25oC
On Resistance of Internal NMOS-11 .3⍀PWRON = High, I
Overcurrent Threshold0.130.180.25AV
Overcurrent Threshold0.230.380.52AV
Gate Output Charge Current192529µAPWRON = High, V
Turn-On Time-16-msC
(PWRON High to M12VO = -10.8V)
Turn-Off Time-3-µsC
M12VIN Input Bias Current-2.55mAPWRON = High
+3.3VAUX SUPPLY CONTROL
On Resistance of Internal PMOS-0.25TBD⍀PAUXON = High, I
On Resistance of Internal PMOS-0.25TBD⍀PAUXON = High, I
Overcurrent Threshold-0.5TBDAV
Overcurrent Threshold-1.0TBDAV
3.3VAUX Undervoltage Trip Threshold-2.9TBDV
Undervoltage Fault Response Time-110-ns
Gate Charge Current1925.029µAPAUXON = High, V
Turn-On Time
(PAUXON High to AUXG = 1V)-16-msC
Turn-Off Time-3-µsC
3.3VAUX Power On Reset Threshold-2.5-VAUXIN Voltage Rising
CONTROL PINS
12VIN Supply Current-5.38mA
AUXIN Supply Current-3TBDmA
OCSET Current93100107µA
Overcurrent to Fault Response Time-500960ns
PWRONA/B, PAUXA/B Threshold Voltage1.01.62.1V
12V Power On Enable Threshold9.41010.2V12VINA Voltage Rising
12V Power On Reset Threshold8.99.19.3V12VINA Voltage Falling
FAULT O/P PINS
FLTA/B Output Low Voltage- 0.5 0.7VI
FLTA/B Output High Voltage
AUXIN
-0.5
AUXIN
-0.1 -VI
FLTA/B, Output Latch ThresholdTBD1.6TBDVI
FAUXA/B Output Low Voltage-0.50.7VI
FAUXA/B Output High Voltage
Storage Temperature Range . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
*This is a stress rating only and functional operation of the device at these or any
other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods of time may affect reliability.
THERMAL CHARACTERISTICS
38-Pin TSSOP Package:
q
= 100°C/Watt, q
JA
= 10°C/Watt
JC
ORDERING GUIDE
TemperaturePackagePackage
ModelRangeDescriptionOption
ADM1014JRU0°C to +70°C38-Pin TSSOPRU-38
PIN CONFIGURATION
M12VOA
M12VGA
PWRO N A
FLTNA
FAUXA
OCSET
AUXGA
AUXOA
12VGA
12VOA
12VOB
12VGB
AUXOB
AUXGB
FAUXB
FLTNB
PWRO N B
M12VGB
M12VOB