Intel Intersil ISL6144 Five-Voltage Monitor Specifications Manual
Summary
This controller provides advanced fault tolerance for critical power distribution systems by acting as an ORing MOSFET solution. Ideal for engineers designing high-reliability equipment—such as network servers and data center infrastructure—it ensures continuous operation by detecting faults, isolating shorts in fast (<300ns) bursts, and managing multiple power sources. The manual details its wide operating range (+10V to +75V), superior switching performance compared to traditional diodes, and application recommendations for robust, redundant UPS and power path designs.
Page 1 Text Content
ISL6144
Data Sheet February 15, 2007 FN9131.3
High Voltage ORing MOSFET Controller Features The ISL6144 ORing MOSFET Controller and a suitably sized Wide Supply Voltage Range +10V to +75V N-Channel power MOSFET(s) increases power distribution
Transient Rating to +100V
efficiency and availability when replacing a power ORing diode
in high current applications. Reverse Current Fault Isolation In a multiple supply, fault tolerant, redundant power distribution Internal Charge Pump Allows the use of N-Channel MOSFET
system, paralleled similar power supplies contribute equally to the load current through various power sharing schemes. HS Comparator Provides Very Fast <0.3µs Response Regardless of the scheme, a common design practice is to Time to Dead Shorts on Sourcing Supply. HS Comparator include discrete ORing power diodes to protect against reverse also has Resistor-adjustable Trip Level current flow should one of the power supplies develop a
HR Amplifier allows Quiet, <100µs MOSFET Turn-off for
catastrophic output short to ground. In addition, reverse current
Power Supply Slow Shut Down
can occur if the current sharing scheme fails and an individual
Open Drain, Active Low Fault Output with 120µs Delay
power supply voltage falls significantly below the others.
Provided in Packages Compliant to UL60950 (UL1950)
Although the discrete ORing diode solution has been used for
Creepage Requirements
some time and is inexpensive to implement, it has some drawbacks. The primary downside is the increased power QFN Package: dissipation loss in the ORing diodes as power requirements for Compliant to JEDEC PUB95 MO-220 systems increase. Another disadvantage when using an ORing QFN - Quad Flat No Leads - Package Outline diode would be failure to detect a shorted or open ORing diode, Near Chip Scale Package footprint, which improves jeopardizing power system reliability. An open diode reduces PCB efficiency and has a thinner profile the system to single point of failure while a diode short might
Pb-Free Plus Anneal Available (Ro HS Compliant)
pose a hazard to technical personnel servicing the system
www.BDTIC.com/Intersil while unaware of this failure.
Applications
The ISL6144 can be used in 10V to 75V systems having similar
ORing MOSFET Control in Power Distribution Systems
power sources and has an internal charge pump to provide a
N + 1 Redundant Distributed Power Systems
floating gate drive for the N-Channel ORing MOSFET. The High Speed (HS) Comparator protects the common bus from File and Network Servers (12V and 48V) individual power supply shorts by turning off the shorted feed’s
Telecom/Datacom Systems
ORing MOSFET in less than 300ns and ensuring low reverse current.
Ordering Information
An external resistor-programmable detection level for the HS
TEMP.
Comparator allows users to set the N-Channel MOSFET
PART PART RANGE PKG.
“VOUT - VIN” trip point to adjust control sensitivity to power NUMBER MARKING (°C) PACKAGE DWG. supply noise.
ISL6144IV* ISL61 44IV -40 to +105 16 Ld TSSOP M16.173
The Hysteretic Regulating (HR) Amplifier provides a slow turn-
ISL6144IVZA* ISL61 44IVZ -40 to +105 16 Ld TSSOP M16.173
off of the ORing MOSFET. This turn-off is achieved in less than
(See Note) (Pb-Free)
100μs when one of the sourcing power supplies is shutdown
slowly for system diagnostics, ensuring zero reverse current. ISL6144IR* ISL 6144IR -40 to +105 20 Ld 5x5 QFN L20.5x5
This slow turn-off mechanism also reacts to output voltage
ISL6144IRZA* ISL6144 IRZ -40 to +105 20 Ld 5x5 QFN L20.5x5
droop, degradation, or power-down.
(See Note) (Pb-Free)
An open drain FAULT pin will indicate that a fault has occurred.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
The fault detection circuitry covers different types of failures; material sets; molding compounds/die attach materials and 100% matte
including dead short in the sourcing supply, a short of any two tin plate termination finish, which are Ro HS compliant and compatible with both Sn Pb and Pb-free soldering operations. Intersil Pb-free
ORing MOSFET terminals, or a blown fuse in the power
products are MSL classified at Pb-free peak reflow temperatures that
distribution path.
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
*Add “-T” suffix for tape and reel.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004, 2006-2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
Page Summary Contents For Intel Intersil ISL6144 Five-Voltage Monitor Specifications Manual
Manual Details
| Brand | Intel |
|---|---|
| Pages | 29 |
| File Size | 784.95 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What is the voltage range for the ISL6144 controller?
It supports a wide supply voltage range of +10V to +75V.
How does the High Speed (HS) Comparator protect the power bus?
It protects against catastrophic output shorts by turning off the shorted feed in less than 300ns.
What is the benefit of using the ISL6144 over discrete ORing diodes?
It provides a lower profile, improves PCB efficiency, and prevents single point failure compared to traditional diode solutions.
Does the controller offer slow turn-off functionality for diagnostics?
Yes, the Hysteretic Regulating (HR) Amplifier achieves a slow turn-off in less than 100µs for system diagnostics.