ADM1014 データシートの表示（PDF） - Analog Devices
部品番号
コンポーネント説明
一致するリスト
ADM1014 Datasheet PDF : 12 Pages
| |||
PRELIMINARY TECHNICAL DATA
ADM1014–SPECIFICATIONS
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-PlugTM
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.
(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.)
Parameter
Min Typ Max
Units Test Conditions/Comments
5V/ 3.3V SUPPLY CONTROL
5V Overcurrent Threshold
-
8
-
5V Overcurrent Threshold Voltage
33
42
50
5V Overcurrent Threshold Voltage
70
80
90
5V Undervoltage Trip Threshold
4.42 4.65 4.7
5V Undervoltage Fault Response Time
-
110 160
5V Turn-On Time
-
9.75 -
(PWRON High to 5VOUT = 4.75V)
3V Overcurrent Threshold
-
10
-
3V Overcurrent Threshold Voltage
41
52
62
3V Overcurrent Threshold Voltage
89
98
108
3V Undervoltage Trip Threshold
2.74 2.86 2.9
3V Undervoltage Fault Response Time -
110 160
3V5VG Undervoltage Enable Threshold -
9.6 -
Voltage
3V Turn-On Time
-
9.75 -
(PWRON High to 3VOUT = 3.00V)
3V5VG Vout High
11.5 11.8 -
Gate Output Charge Current
19
25.0 29
Gate Turn-On Time
-
280 -
(PWRON High to 3V5VG = 11V)
Gate Turn-Off Time
-
2
-
A
See Typical Application Diagram
mV
VOCSET = 0.6V
mV
VOCSET = 1.2V
V
ns
ms
C3V5VG = 0.033µF, C5VOUT = 2000µF,
RL = 1⍀
A
See Typical Application Diagram
mV OCSET = 0.6V
mV OCSET = 1.2V
V
ns
V
ms
C3V5VG = 0.033µF, C3VOUT = 2000µF,
RL = 0.43⍀
V
PWRON = High, FLTN = High
µA
PWRON = High, V3V5VG = 4V
µs
C3V5VG = 0.033µF,3V5VG Rising 10% to 90%
µs
C3V5VG = 0.033µF, 3V5VG Falling 90% to 10%
+12V SUPPLY CONTROL
On Resistance of Internal PMOS
On Resistance of Internal PMOS
Overcurrent Threshold
Overcurrent Threshold
12V Undervoltage Trip Threshold
Undervoltage Fault Response Time
-
0.3 0.35
-
0.35 0.5
0.6 0.75 0.9
1.25 1.50 1.8
10.25 10.6 10.8
-
110 -
⍀
PWRON = High, ID = 0.5A, TA= TJ= 25oC
⍀
PWRON = High, ID = 0.5A, TA= TJ= 70oC
A
VOCSET = 0.6V
A
VOCSET = 1.2V
V
ns
–2–
REV. PrN 1/02
Share Link: 