LTC4352
RECOMMENDED FOR NEW DESIGNSLow Voltage Ideal Diode Controller with Monitoring
- Part Models
- 12
- 1ku List Price
- Starting From $3.82
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 2
Video 1
Product Selection Guide 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4352CDD#PBF | 12-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4352CDD#TRPBF | 12-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4352CMS#PBF | 12-Lead MSOP | ||
| LTC4352CMS#TRPBF | 12-Lead MSOP | ||
| LTC4352HDD#PBF | 12-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4352HDD#TRPBF | 12-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4352HMS#PBF | 12-Lead MSOP | ||
| LTC4352HMS#TRPBF | 12-Lead MSOP | ||
| LTC4352IDD#PBF | 12-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4352IDD#TRPBF | 12-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC4352IMS#PBF | 12-Lead MSOP | ||
| LTC4352IMS#TRPBF | 12-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LTC4352CMS#PBF | PRODUCTION | |
| LTC4352CMS#TRPBF | PRODUCTION | |
| LTC4352HMS#PBF | PRODUCTION | |
| LTC4352HMS#TRPBF | PRODUCTION | |
| LTC4352IMS#PBF | PRODUCTION | |
| LTC4352IMS#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC4352CMS#PBF | PRODUCTION | |
| LTC4352CMS#TRPBF | PRODUCTION | |
| LTC4352HMS#PBF | PRODUCTION | |
| LTC4352HMS#TRPBF | PRODUCTION | |
| LTC4352IMS#PBF | PRODUCTION | |
| LTC4352IMS#TRPBF | PRODUCTION | |
|
Apr 18, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices |
||
| LTC4352HMS#PBF | PRODUCTION | |
| LTC4352HMS#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4352
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.
Evaluation Kits
LTC4352 Low Voltage Ideal Diode Controller with Monitoring, LT4351 Replacement
Resources
Reference Designs
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