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MILPITAS, CA January 6, 2016 Linear Technology Corporation introduces the LTC4236, a dual ideal diodeOR and single Hot Swap controller with a load current monitoring output. High availability systemsservers, network routers, and solidstate drivespower circuit boards with multiple power supply feeds. The LTC4236 combines (diodeORs) two power supplies while providing inrush current control, overcurrent protection, and current monitoring, all in a compact footprint. For supply ORing, lowloss Nchannel MOSFETs replace power Schottky diodes and associated heat sinks, reducing voltage drop, power loss and solution area. The downstream Hot Swap MOSFET facilitates safe board insertion and removal from a live backplane, and protects from shortcircuit faults with a fast acting currentlimited circuit breaker. A lowoffset groundreferenced output signal enables load current measurement with an external analogtodigital converter.
The LTC4236 regulates a low 15mV forward voltage drop across the ideal diode MOSFETs to prevent DC reverse current while ensuring smooth current transfer during supply switchover. Ideal diode fast turnon and turnoff minimizes output voltage droop and transient reverse current. A diode off input and backtoback MOSFET capability enable supply prioritization, important when ORing a main supply with a higher voltage auxiliary supply or battery. In an output shortcircuit, the LTC4236 further reduces its low 25mV current limit and runs an adjustable timer to limit MOSFET power dissipation. For application flexibility, the connector debounce filter delay is fixed internally or adjustable with an external capacitor.
The LTC4236 is available in two options: the LTC42361 remains off after an overcurrent fault, whereas the LTC42362 automatically turns on with a 0.15% duty cycle. Specified over the 0°C to 70°C commercial and 40°C to 85°C industrial temperature ranges, the LTC4236 is offered in a 28pin 4mm x 5mm QFN package. 1,000piece pricing starts at $4.25 each. Device samples and evaluation circuit boards are available online or from your local Linear Technology sales office. For more information, visit www.linear.com/product/LTC4236.
Ideal DiodeOR & Inrush Current Control for Redundant Supplies
Load Current Monitoring Output Low Loss Replacement for Power Schottky DiodeOR
Smooth Supply Switchover without Oscillation
Fast ≤ 0.5µs Ideal Diode Turn On/Off
Enables Safe Board Insertion into a Live Backplane
Adjustable Debounce & OvercurrentFault Timers Fast 0.5µs Response to Overcurrent
Current Limit Folds Back to Reduce MOSFET Power Dissipation
2.9V to 18V Operating Range Fault, Power Good & Diode Status Outputs
28Pin 4mm x 5mm QFN Package
Compact Dual Supply ORing & Single Hot Swap Controller with Load Current Monitoring OutputThe USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for over three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and
aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, µModule® subsystems, and wireless sensor network products. For more information, visit
www.linear.com.
, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
Tel: (408) 4321900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
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Angela Ao
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yfunasaki@linear.com
Takashi Matsuda
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630.420.8744 www.ezwire.com 0Linear Technology Corporation issued this content on 2016-01-06 and is solely responsible for the information contained herein. Distributed by Public, unedited and unaltered, on 2016-01-06 20:15:20 UTC
Original Document: http://www.linear.com/docs/47531