1. Products
  2. Power Monitor, Control, and Protection
  3. PowerPath, Ideal Diodes, and Load Switches
  4. LTC4352


Alternative Parts

Overview

Features and Benefits

  • Low Loss Replacement for Power Diode
  • Controls N-Channel MOSFET
  • 0V to 18V Supply ORing or Holdup
  • 0.5μs Turn-On and Turn-Off Time
  • Undervoltage and Overvoltage Protection
  • Open MOSFET Detect
  • Status and Fault Outputs
  • Hot Swappable
  • Reverse Current Enable Input
  • 12-Pin MSOP and DFN (3mm × 3mm) Packages

Product Details

The LTC4352 creates a near-ideal diode using an external N-channel MOSFET. It replaces a high power Schottky diode and the associated heat sink, saving power and board area. The ideal diode function permits low loss power ORing and supply holdup applications.

The LTC4352 regulates the forward voltage drop across the MOSFET to ensure smooth current transfer in diode-OR applications. A fast turn-on reduces the load voltage droop during supply switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse currents.

The controller operates with supplies from 2.9V to 18V. For lower voltages, an external supply is needed at the VCC pin. Power passage is disabled during undervoltage or overvoltage conditions. The controller also features an open MOSFET detect circuit that flags excessive voltage drop across the pass transistor in the on state. A REV pin enables reverse current, overriding the diode behavior when desired.

Applications

  • Redundant Power Supplies
  • Supply Holdup
  • Telecom Infrastructure
  • Computer Systems and Servers

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC4352

Reference Designs (5)

Product Recommendations

LTC4352 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC4352CDD#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC4352CDD#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC4352CMS#PBF Material Declaration Reliability Data 12-Lead MSOP
LTC4352CMS#TRPBF Material Declaration Reliability Data 12-Lead MSOP
LTC4352HDD#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC4352HDD#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC4352HMS#PBF Material Declaration Reliability Data 12-Lead MSOP
LTC4352HMS#TRPBF Material Declaration Reliability Data 12-Lead MSOP
LTC4352IDD#PBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC4352IDD#TRPBF Material Declaration Reliability Data 12-Lead DFN (3mm x 3mm w/ EP)
LTC4352IMS#PBF Material Declaration Reliability Data 12-Lead MSOP
LTC4352IMS#TRPBF Material Declaration Reliability Data 12-Lead MSOP
Wafer Fabrication Data R536 Reliability Data

PCN-PDN Information

Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

Sample & Buy


Ordering FAQs


See our Ordering FAQs for answers to questions about online orders, payment options and more.

 

Buy Now Pricing


(**) Displayed Buy Now Price and Price Range is based on small quantity orders.

 

List Pricing


(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

 

Lead Times


Please see the latest communication from our CCO regarding lead times.

 

Sampling


Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help

 

Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.