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MAX5916EUI+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
General Description
The MAX5915/MAX5915A/MAX5916/MAX5916A dual
PCI 2.2 hot-swap controllers allow for safe insertion and
removal of two PCI cards into live PCI slots or back-
planes by limiting the inrush current at startup. After
startup, these devices provide protection against short-
circuit, overcurrent, and undervoltage conditions.
The MAX5915/MAX5915A/MAX5916/MAX5916A pro-
vide independent power controls for +3.3V, +5V, ±12V,
and +3.3V auxiliary supplies of two PCI cards. These
devices provide intelligent selective thermal shutdown
control that shuts down the channel with an overcurrent
fault. All devices include internal power MOSFETs for the
+12V, -12V, and +3.3V auxiliary outputs. These devices
use internal charge pumps to activate the gates of the
internal FETs controlling 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 device to moni-
tor two PCI card slots.
The MAX5915/MAX5915A offer latched fault protection
and the MAX5916/MAX5916A offer autorestart fault pro-
tection. The devices are available in the low-profile
28-pin TSSOP package.
Features
♦ PCI 2.2 Compliant
♦ Independent Power Controls for +3.3V, +5V, ±12V,
and +3.3V Auxiliary Supplies of Two PCI Cards
♦ Internal MOSFET Switches for ±12V and +3.3V
Auxiliary Outputs
♦ Separate ON/OFF Control Input for Each Channel
♦ Independent +3.3V Auxiliary Output ON/OFF
Control
♦ Overcurrent Foldback with Timeout and Shutdown
Protection for ±12V and +3.3V Auxiliary Rails with
Status Report
♦ Brick Wall with Timeout and Shutdown Protection
for +5V and +3.3V Rails with Status Report
♦ Output Undervoltage Monitoring for +3.3V, +5V,
+12V, and +3.3V Auxiliary Rails with Status Report
♦ +3.3V Auxiliary Autorestart
♦ Intelligent Selective Thermal Shutdown Control
Shuts Down Only the Channel with an Overcurrent
Fault
♦ 28-Pin TSSOP Package
MAX5915/MAX5915A/MAX5916/MAX5916A
Dual PCI 2.2 Hot-Swap Controllers
________________________________________________________________ Maxim Integrated Products 1
19-2420; Rev 2; 9/05
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.
Ordering Information
Applications
PCI 2.2 Server
PCI Server
RAID
PART TEMP RANGE PIN-PACKAGE
MAX5915EUI* -40°C to +85°C 28 TSSOP
MAX5915UUI 0°C to +85°C 28 TSSOP
MAX5915AEUI* -40°C to +85°C 28 TSSOP
MAX5915AUUI 0°C to +85°C 28 TSSOP
MAX5916EUI* -40°C to +85°C 28 TSSOP
MAX5916UUI 0°C to +85°C 28 TSSOP
MAX5916AEUI* -40°C to +85°C 28 TSSOP
MAX5916AUUI 0°C to +85°C 28 TSSOP
Selector Guide, Pin Configuration, Functional Diagram, and
Typical Operating Circuit appear at end of data sheet.
Typical Application Circuit
+12VIN
+3.3V
+5V
-12VIN
3.3VGATE_
3.3VSEN_
3.3VO_
5VGATE_ 5VSEN_
FAIRCHILD
FDS6670A
FAIRCHILD
FDS6670A
0.005Ω
0.005Ω
10kΩ
10kΩ
5VO_
5V
470µF
47µF
3.3VAUXIN
3.3VAUXO_
PGOOD_
GND
ON_
ON
OFF
AUXON_
+12VO_
-12VO_
MAX5915
MAX5915A
MAX5916
MAX5916A
470µF
4.7µF⎥⎥ 0.1µF
ON
OFF
4.7µF⎥⎥ 0.1µF
4.7µF⎥⎥ 0.1µF
47µF
47µF
-12V
+12V
+3.3VAUX
*Contact factory for availabilty.
MAX5915/MAX5915A/MAX5916/MAX5916A
Dual PCI 2.2 Hot-Swap Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
+12VIN to GND ...................................................-0.3V to +14.0V
-12VIN to GND........................................................-14V to +0.3V
-12VO_ to GND......................................+0.3V to (V
-12VIN
- 0.3V)
+12VO_, 3.3VGATE_, 5VGATE_
to GND..................................................-0.3V to (V
+12VIN
+ 0.3V)
Any Other Pin to GND ...........................................-0.3V to +6.0V
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TSSOP (derate 23.8mW/°C above +70°C) ...........1.9W
Operating Temperature Ranges:
MAX591_U_ _ ......................................................0°C to +85°C
MAX591_A U_ _ ...................................................0°C to +85°C
MAX591_E_ _....................................................-40°C to +85°C
MAX591_ AE_ _ ................................................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
-12VIN
= -12V, V
+12VIN
= +12V, V
3.3VAUXIN
= +3.3V, V
ON_
= V
AUXON_
= +5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified.
Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLIES
Main Supply Input Voltage
Range
V
+12VIN
10.8 12 13.2 V
Main Supply Undervoltage
Lockout (UVLO)
V
+12UVLO
V
+12VIN
rising 9.6 10 10.8 V
Main Supply UVLO Hysteresis V
UVLO, HYS
100 mV
Main Input UVLO Delay Time t
DEG, UVLO
Figures 1 and 2 (Note 1) 1.6 ms
Supply Current I
Q
2.5 5.0 mA
+3.3V SUPPLY CONTROL
Gate Charge Current I
3.3VGATE_
,
CHG
V
3 .3 V GAT E
_ = + 6V , V
3 .3 V S E N _
= + 3.3V ,
V
3 .3 V O
_ = + 3.3V
51530µA
Gate Discharge Current I
3.3VGATE_
,
DIS
V
3.3VGATE
_ = +12V, V
ON_
= 0V 50 150 250 µA
Gate High Voltage V
3.3VGATE_
,
HIGH
I
3.3VGATE
_ = 1µA
V
+12VIN
-
0.5
V
+12VIN
V
Gate Low Voltage V
3.3VGATE_
,
LOW
I
3.3VGATE
_ = 1µA, V
ON
_ = 0V 0.1 0.4 V
3.3VO_ Input Bias Current I
3.3VO_, BIAS
V
3.3VO
_ = +3.3V 20 µA
3.3VO_ Internal Pulldown R
PD
V
ON
_ = 0V 1 kΩ
3.3VSEN_ Input Bias Current I
3.3VSEN_
,
BIAS
V
3.3VSEN
_ = +3.3V 10 µA
Current-Limit Threshold V
3.3V, LIM
V
3.3VGATE
_ = +6V 41 46 51 mV
Output Undervoltage Threshold V
3.3VIN, UV
V
3.3VGATE
_ falling 2.79 2.89 2.99 V
Output Undervoltage Threshold
Hysteresis
30 mV
MAX5915/MAX5915A/MAX5916/MAX5916A
Dual PCI 2.2 Hot-Swap Controllers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
-12VIN
= -12V, V
+12VIN
= +12V, V
3.3VAUXIN
= +3.3V, V
ON_
= V
AUXON_
= +5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified.
Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
+5V SUPPLY CONTROL
Gate Charge Current I
5VGATE
_
,
CHG
V
5VGATE
_ = +6V, V
5VSEN
_ = +5V,
V
5VO
_ = +5V
51530µA
Gate Discharge Current I
5VGATE
_
, DIS
V
5VGATE
_ = +12V, V
ON
_ = 0V 50 150 250 µA
Gate High Voltage V
5VGATE
_
,
HIGH
I
5VGATE
_ = 1µA
V
+12VIN
-
0.5V
V
+12VIN
V
Gate Low Voltage V
5VGATE
_
,
LOW
I
5VGATE
_ = 1µA, V
ON
_ = 0V 0.1 0.4 V
5VO_ Input Bias Current I
5VO
_
, BIAS
V
5VO
_ = +5V 20 µA
5VO_ Internal Pulldown R
5VO
_
, PD
V
ON
_ = 0V 1 kΩ
5VSEN_ Input Bias Current I
5VSEN
_
, BIAS
V
5VSEN
_ = +5V 10 µA
Current-Limit Threshold V
5VO
_
, LIM
V
5VGATE
_ falling 27 31 35 mV
Output Undervoltage Threshold V
5VO
_
, UV
Output falling 4.34 4.50 4.70 V
Output Undervoltage Threshold
Hysteresis
45 mV
+12V SUPPLY CONTROL
T
A
= +25°C, I
D
= 0.5A 0.32 0.38
On-Resistance of Internal Switch R
DS(ON), +12V
T
A
= +85°C, I
D
= 0.5A 0.5
Ω
Foldback Current Limit I
+12VIN, LIM
V
+12VO
_ = 0V 0.68 1 1.36 A
Current-Foldback Threshold Output current rising (Note 2) 1.4 A
Output Undervoltage Threshold V
+12VO
_
, UV
Output falling 10.00 10.4 10.82 V
+12VO_ Internal Pulldown R
+12VO
_
, PD
V
ON
_ = 0V 1 kΩ
-12V SUPPLY CONTROL
T
A
= +25°C, I
D
= 0.1A 0.58 0.9
On-Resistance of Internal Switch R
DS(ON), -12V
T
A
= +85°C, I
D
= 0.1A 1.3
Ω
Foldback Current Limit I
-12VIN, LIM
V
-12VO_
= 0V 136 205 273 mA
Current-Foldback Threshold Output current rising (Note 2) 240 mA
-12VO_ Internal Pullup R
-12VO_, PU
V
ON_
= 0V 1 kΩ
+3.3VAUX SUPPLY CONTROL
Input Voltage Range V
3.3VAUXIN
3.0 3.3 3.6 V
3.3VAUXIN Undervoltage
Lockout
V
UVLO, AUX
Input rising 2.65 2.75 2.85 V
Hysteresis V
UVLO-AUX
,
HYS
30 mV
Supply Current I
Q, 3.3VAUX
12mA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

MAX5916EUI+

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Buy MAX5916EUI+
Manufacturer:
Maxim Integrated
Description:
Hot Swap Voltage Controllers Dual PCI 2.2 Hot Swap Controller
Lifecycle:
New from this manufacturer.
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