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PDF MAX5916EUI Data sheet ( Hoja de datos )
| Número de pieza | MAX5916EUI | |
| Descripción | Dual PCI 2.2 Hot-Swap Controllers | |
| Fabricantes | Maxim Integrated | |
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19-2420; Rev 0; 4/02
Dual PCI 2.2 Hot-Swap Controllers
General Description
The MAX5915/MAX5916 dual PCI 2.2 hot-swap con-
trollers allow for safe insertion and removal of two PCI
cards into live PCI slots or backplanes by limiting the
inrush current at startup. After startup, the
MAX5915/MAX5916 provide protection against short-
circuit, overcurrent, and undervoltage conditions.
The MAX5915/MAX5916 provide independent power
controls for +3.3V, +5V, ±12V, and +3.3V auxiliary sup-
plies of two PCI cards. The MAX5915/MAX5916 provide
intelligent selective thermal shutdown control that shuts
down the channel with an overcurrent fault. Both the
MAX5915 and MAX5916 include internal power
MOSFETs for the +12V, -12V, and +3.3V auxiliary out-
puts. The MAX5915/MAX5916 use internal charge
pumps to activate the gates of the internal FETs control-
ling the +3.3V auxiliary supply. Internal FETs and current-
sense circuitry regulate the ±12V and the +3.3V auxiliary
supplies. Channels A and B operate independently,
allowing a single MAX5915/MAX5916 to monitor two PCI
card slots.
The MAX5915 offers latched fault protection and the
MAX5916 offers autorestart fault protection. The
devices are available in the low-profile 28-pin TSSOP
package and are specified over the -40°C to +85°C
extended temperature range.
PCI 2.2 Server
PCI Server
RAID
Applications
Features
o PCI 2.2 Compliant
o Independent Power Controls for +3.3V, +5V, ±12V,
and +3.3V Auxiliary Supplies of Two PCI Cards
o Internal MOSFET Switches for ±12V and +3.3V
Auxiliary Outputs
o Separate ON/OFF Control Input for Each Channel
o Independent +3.3V Auxiliary Output ON/OFF
Control
o Overcurrent Foldback with Timeout and Shutdown
Protection for ±12V and +3.3V Auxiliary Rails with
Status Report
o Brick Wall with Timeout and Shutdown Protection
for +5V and +3.3V Rails with Status Report
o Output Undervoltage Monitoring for +3.3V, +5V,
+12V, and +3.3V Auxiliary Rails with Status Report
o +3.3V Auxiliary Autorestart
o Intelligent Selective Thermal Shutdown Control
Shuts Down Only the Channel with an Overcurrent
Fault
o 28-Pin TSSOP Package
Ordering Information
PART
FAULT
MANAGEMENT
TEMP
RANGE
PIN-
PACKAGE
MAX5915EUI
Latched
-40°C to +85°C 28 TSSOP
MAX5916EUI Autorestart -40°C to +85°C 28 TSSOP
Pin Configuration, Functional Diagram, and Typical Operating
Circuit appear at end of data sheet.
Typical Application Circuit
+12V
4.7µF 0.1µF
-12V
4.7µF 0.1µF
ON
OFF
10kΩ
+3.3VAUX
4.7µF 0.1µF
ON
OFF
10kΩ
FAIRCHILD
+3.3V FDS6670A
+5V
0.005Ω
FAIRCHILD
FDS6670A
470µF
0.005Ω
+12VIN 3.3VGATE_
-12VIN
3.3VAUXIN
3.3VSEN_
3.3VO_ 5VGATE_ 5VSEN_
ON_
AUXON_
MAX5915
MAX5916
GND
5VO_
+12VO_
-12VO_
3.3VAUXO_
PGOOD_
470µF
47µF
5V
47µF
47µF
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Dual PCI 2.2 Hot-Swap Controllers
Typical Operating Characteristics
(V+12VIN = +12V, V3.3VAUXIN = +3.3V, V-12VIN = -12V, V5V = +5V, V3.3V = +3.3V, R5VSEN_ = 0.005Ω, R3.3VSEN_ = 0.005Ω, C3.3VO_ =
C5VO_ = 470µF, C+12VO_ = C-12VO_ = C3.3VAUXO_ = 47µF, TA = +25°C, unless otherwise noted. See Typical Application Circuit.)
+12VO_ VOLTAGE
vs. OUTPUT CURRENT
12.1
12.0
11.9
11.8
11.7
11.6
11.5
11.4
0
0.5 1.0
OUTPUT CURRENT (A)
1.5
-12VO_ CURRENT FOLDBACK
vs. DIFFERENTIAL SWITCH VOLTAGE
250
200
150
100
50
0
0 2 4 6 8 10
V-12VIN - V-12VO_ (V)
3.3VO_ VOLTAGE
vs. OUTPUT CURRENT
3.32
3.30
3.28
3.26
3.24
3.22
3.20
3.18
3.16
0
FAIRCHILD
FDS6670A
24
6
OUTPUT CURRENT (A)
12
8
+12VO_ CURRENT FOLDBACK
vs. DIFFERENTIAL SWITCH VOLTAGE
1.1
0.9
0.7
0.5
0.3
0.1
-0.1
0
2 4 6 8 10
V+12VIN - V+12VO_ (V)
5VO_ VOLTAGE
vs. OUTPUT CURRENT
5.02
5.00
4.98
4.96
4.94
4.92
4.90
4.88
4.86
4.84 FAIRCHILD
4.82 FDS6670A
4.80
0 12 3 4
OUTPUT CURRENT (A)
12
5
3.3VO_ SENSE RESISTOR VOLTAGE
vs. DIFFERENTIAL SWITCH VOLTAGE
48
46
44
42
40
38
36
34 DURING CURRENT LIMIT
FAIRCHILD
32 FDS6670A
30
1.0
1.5 2.0 2.5
VIN - V3.3VSEN_ (V)
3.0
3.5
-12VO_ VOLTAGE
vs. OUTPUT CURRENT
-11.5
-11.6
-11.7
-11.8
-11.9
-12.0
-12.1
0
50 100 150 200
OUTPUT CURRENT (mA)
250
5VO_ SENSE RESISTOR VOLTAGE
vs. DIFFERENTIAL SWITCH VOLTAGE
40
38
36
34
32
30
28
26
24 DURING CURRENT LIMIT
22 FAIRCHILD
FDS6670A
20
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIN - V5VSEN_ (V)
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
0
3.3VAUX_ VOLTAGE
vs. OUTPUT CURRENT
0.15 0.30 0.45 0.60 0.75 0.90 1.05 1.20
OUTPUT CURRENT (A)
_______________________________________________________________________________________ 5
5 Page 
Dual PCI 2.2 Hot-Swap Controllers
Pin Description
PIN NAME
FUNCTION
1 +12VOA Channel A +12V Output
2 3.3VGATEA Channel A +3.3V External N-Channel MOSFET Gate Drive. 3.3VGATEA driven by +12VIN.
3 3.3VSENA Channel A External 3.3V Current-Sense Input
4 3.3VOA Channel A +3.3V Output Sense
5
ONA
Channel A Master ON/OFF Output Control. Drive ONA logic high to enable channel A +3.3V, +5V, and
±12V outputs. V+12VIN must be > UVLO threshold.
6
ONB
Channel B Master ON/OFF Output Control. Drive ONB logic high to enable channel B +3.3V, +5V, and
±12V outputs. V+12VIN must be > UVLO threshold.
7 GND Ground
8
PGOODA
Channel A Power-Good Output. PGOODA is an open-drain output that pulls low when a fault is detected on
channel A outputs.
9
PGOODB
Channel B Power-Good Output. PGOODB is an open-drain output that pulls low when a fault is detected on
channel B outputs.
10
AUXONA
Channel A 3.3VAUX ON/OFF Control Input. Drive AUXONA logic high to enable channel A +3.3V auxiliary
output.
11
AUXONB
Channel B 3.3VAUX ON/OFF Control Input. Drive AUXONB logic high to enable channel B +3.3V auxiliary
output.
12 3.3VAUXOA Channel A 3.3VAUX Output
13 3.3VAUXIN 3.3VAUX Input. Provides power to the +3.3V auxiliary channels.
14 3.3VAUXOB Channel B 3.3VAUX Output
15 -12VOB Channel B -12V Output
16 -12VIN -12V Input
17 -12VOA Channel A -12V Output
18 5VOB Channel B +5V Output Sense
19 5VSENB Channel B External +5V Current-Sense Input
20 5VGATEB Channel B +5V External N-Channel MOSFET Gate Drive. 5VGATEB driven by +12VIN.
21 5VOA Channel A +5V Output Sense
22 5VSENA Channel A External +5V Current-Sense Input
23 5VGATEA Channel A +5V External N-Channel MOSFET Gate Drive. 5VGATEA driven by +12VIN.
24 3.3VOB Channel B +3.3V Output Sense
25 3.3VSENB Channel B External +3.3V Current-Sense Input
26 3.3VGATEB Channel B +3.3V External N-Channel MOSFET Gate Drive. 3.3VGATEB driven by +12VIN.
27 +12VOB Channel B +12V Output
28 +12VIN +12V Input. +12VIN powers the main supplies of the MAX5915/MAX5916.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet MAX5916EUI.PDF ] | |
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