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PDF ( 数据手册 , 数据表 ) MAX15068

零件编号 MAX15068
描述 Single Hot-Swap Controller
制造商 Maxim Integrated Products
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MAX15068 数据手册, 描述, 功能
MAX15068
EVALUATION KIT AVAILABLE
Dual ORing, Single Hot-Swap Controller with
Accurate Current Monitoring
General Description
The MAX15068 offers ORing function and hot-swap
features for two input-supply-rail applications requiring the
safe insertion and removal of circuit line cards from a live
backplane. The device integrates dual ORing MOSFET
controllers, a single hot-swap controller, electronic circuit-
breaker protection, and power monitoring in a single
package. The device is designed to operate from 3.7V to
18V supply voltages.
The device regulates the forward voltage drop across the
ORing MOSFETs to ensure smooth current transfer from
one supply to the other without oscillation. The ORing
MOSFET turns on quickly to reduce the load voltage droop
during supply switchover. If the input supply fails or is short-
ed, a fast turn-off minimizes reverse-current transients.
The device implements a foldback current limit during hot-
swap startup in order to control inrush current, thereby
lowering di/dt and keeping the operation of the hot-swap
MOSFET under safe operating area (SOA). An internal
70ms timer starts counting when the device enters the
hot-swap startup phase. After the hot-swap startup cycle
is completed, on-chip comparators provide active current-
limit protection against short-circuit and overcurrent faults.
The load is disconnected from the input quickly in the
event of a fault condition.
The device provides current monitoring from 3A to 10A
(VIN = 12V, TA = +25°C with RSENSE = 3mΩ) with ±0.6%
accuracy. A voltage proportional to the input current
delivered to the system could be read directly at the
IPMON pin.
The device is factory-calibrated to deliver accurate
overcurrent protection with ±5% accuracy. During an
overcurrent-fault condition, the device enters an autoretry
mode. The device features an adjustable slew-rate control
during startup. Additional features include power-good
and fault-indicator outputs.
The MAX15068 is available in a 20-pin, (4mm x 5mm)
TQFN package and is specified from a -40°C to +125°C
operating temperature range.
Features and Benefits
● 3.7V to 18V Operating Voltage Range (ORing and
Hot Swap)
● 4.8V to 18V Operating Voltage Range (Current
Monitor)
● Seamless Power Transition of Redundant Supplies
● Controls N-Channel MOSFETs
● < 0.5µs Turn-On and Reverse Turn-Off Time
Current Monitoring (±0.6% Accuracy Typ)
● Programmable Slew-Rate Control
Adjustable Current-Limit Fault Delay
● Programmable Circuit-Breaker Current Threshold
● Inrush Current Regulated at Startup with
Programmable SOA Control
● Programmable Undervoltage Lockout
● Small (4mm x 5mm) TQFN Package
Applications
● Baseband Station
● Redundant Power Supplies
● Supply Holdup
● Computer Systems and Servers
● Telecom Networks
● Storage Bridge Bay
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX15068.related.
19-6872; Rev 0; 12/13
Free Datasheet http://www.datasheet4u.com/







MAX15068 pdf, 数据表
MAX15068
Dual ORing, Single Hot-Swap Controller with
Accurate Current Monitoring
Typical Operating Characteristics (continued)
(VIN1 = VIN2 = 12V, CIN1 = CIN2 = CVS = 1µF, RSENSE = 3mΩ, unless otherwise noted.)
VIN1
VOG1
VGATE
STARTUP WAVEFORM
(VIN = 3.7V)
toc17
2V/div
5V/div
5V/div
VIN1
VOG1
40ms/div
VGATE
STARTUP WAVEFORM
(VIN = 12V)
toc18
5V/div
5V/div
VIN1
10V/div
VOG1
40ms/div
VGATE
STARTUP WAVEFORM
(VIN = 18V)
toc19
10V/div
10V/div
10V/div
40ms/div
OVERCURRENT-FAULT WAVEFORM
(CB = GND)
toc20
OVERCURRENT-FAULT WAVEFORM
(CB = Hi-Z)
toc21
OVERCURRENT-FAULT WAVEFORM
(CB = VS)
toc22
VIN1
VGATE
VOUT
IOUT
200µs/div
10V/div
VIN1
20V/div
VGATE
10V/div
VOUT
20A/div
IOUT
200µs/div
10V/div
VIN1
20V/div
VGATE
10V/div
20A/div
VOUT
IOUT
200µs/div
10V/div
20V/div
10V/div
20A/div
VIN1
VGATE
VOUT
OUT SHORT-CIRCUIT RESPONSE
toc23
10V/div
20V/div
10V/div
IIN1 10A/div
40µs/div
VIN1
VGATE
VOUT
IOUT
AUTORETY WAVEFORM
toc24
10V/div
20V/div
10V/div
200ms/div
20A/div
www.maximintegrated.com
Maxim Integrated 8
Free Datasheet http://www.datasheet4u.com/







MAX15068 equivalent, schematic
MAX15068
Typical Application Circuit
Dual ORing, Single Hot-Swap Controller with
Accurate Current Monitoring
12V
RSENSE
0.003Ω
12V 12V
137kΩ
20kΩ
CP1 IN1 OG1 CP2 IN2 OG2
CSP
ON
MAX15068
EN
VS CB GND PC
CSN GATE OUT
FAULT
PG
IPMON
CDLY
20kΩ
Ordering Information
PART
OPERATING RANGE
MAX15068ATP+
3.7V to 18V
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
FUNCTION
Autoretry, Current Monitor
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
20 TQFN-EP*
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
20 TQFN
PACKAGE
CODE
T2045+1C
OUTLINE
NO.
21-0726
LAND
PATTERN NO.
www.maximintegrated.com
Maxim Integrated 16
Free Datasheet http://www.datasheet4u.com/










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