LTC4357 - Positive High Voltage Ideal Diode Controller
Features
- Reduces Power Dissipation by Replacing a Power Schottky Diode with an N-Channel MOSFET
- 0.5μs Turn-Off Time Limits Peak Fault Current
- Wide Operating Voltage Range: 9V to 80V
- Smooth Switchover without Oscillation
- No Reverse DC Current
- Available in 6-Lead (2mm × 3mm) DFN and 8-Lead MSOP Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC®4357 is a positive high voltage ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode. When used in diode-OR and high current diode applications, the LTC4357 reduces power consumption, heat dissipation, voltage loss and PC board area.
The LTC4357 easily ORs power sources to increase total system reliability. In diode-OR applications, the LTC4357 controls the forward voltage drop across the MOSFET to ensure smooth current transfer from one path to the other without oscillation. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC4357CDCB#PBF | 2x3 DFN-6 | DCB | C | 05-08-1715 | Yes |
| LTC4357CDCB#TRMPBF | 2x3 DFN-6 | DCB | C | 05-08-1715 | Yes |
| LTC4357CDCB#TRPBF | 2x3 DFN-6 | DCB | C | 05-08-1715 | Yes |
| LTC4357CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC4357CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC4357HDCB#PBF | 2x3 DFN-6 | DCB | H | 05-08-1715 | Yes |
| LTC4357HDCB#TRMPBF | 2x3 DFN-6 | DCB | H | 05-08-1715 | Yes |
| LTC4357HDCB#TRPBF | 2x3 DFN-6 | DCB | H | 05-08-1715 | Yes |
| LTC4357HMS8#PBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LTC4357HMS8#TRPBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LTC4357IDCB#PBF | 2x3 DFN-6 | DCB | I | 05-08-1715 | Yes |
| LTC4357IDCB#TRMPBF | 2x3 DFN-6 | DCB | I | 05-08-1715 | Yes |
| LTC4357IDCB#TRPBF | 2x3 DFN-6 | DCB | I | 05-08-1715 | Yes |
| LTC4357IMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LTC4357IMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LTC4357MPMS8 | MS-8 | MS8 | MP | 05-08-1660 | No |
| LTC4357MPMS8#PBF | MS-8 | MS8 | MP | 05-08-1660 | Yes |
| LTC4357MPMS8#TR | MS-8 | MS8 | MP | 05-08-1660 | No |
| LTC4357MPMS8#TRPBF | MS-8 | MS8 | MP | 05-08-1660 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4357CDCB#PBF | 2x3 DFN-6 | C | $2.43 | Yes | ||
| LTC4357CDCB#TRMPBF | 2x3 DFN-6 | C | $2.43 | $1.75 | Yes | |
| LTC4357CDCB#TRPBF | 2x3 DFN-6 | C | $2.43 | $1.70 | Yes | |
| LTC4357CMS8#PBF | MS-8 | C | $2.43 | $1.70 | Yes | |
| LTC4357CMS8#TRPBF | MS-8 | C | $1.75 | Yes | ||
| LTC4357HDCB#PBF | 2x3 DFN-6 | H | $3.36 | Yes | ||
| LTC4357HDCB#TRMPBF | 2x3 DFN-6 | H | $3.36 | $2.40 | Yes | |
| LTC4357HDCB#TRPBF | 2x3 DFN-6 | H | $3.36 | $2.35 | Yes | |
| LTC4357HMS8#PBF | MS-8 | H | $3.36 | $2.35 | Yes | |
| LTC4357HMS8#TRPBF | MS-8 | H | $2.41 | Yes | ||
| LTC4357IDCB#PBF | 2x3 DFN-6 | I | $2.91 | Yes | ||
| LTC4357IDCB#TRMPBF | 2x3 DFN-6 | I | $2.91 | $2.09 | Yes | |
| LTC4357IDCB#TRPBF | 2x3 DFN-6 | I | $2.91 | $2.04 | Yes | |
| LTC4357IMS8#PBF | MS-8 | I | $2.91 | $2.04 | Yes | |
| LTC4357IMS8#TRPBF | MS-8 | I | $2.09 | Yes | ||
| LTC4357MPMS8 | MS-8 | MP | $7.29 | $5.10 | No | |
| LTC4357MPMS8#PBF | MS-8 | MP | $7.29 | $5.10 | Yes | |
| LTC4357MPMS8#TR | MS-8 | MP | $5.16 | No | ||
| LTC4357MPMS8#TRPBF | MS-8 | MP | $5.16 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1203A | LTC4357 Positive High Voltage Ideal Diode Controller | $50.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4357HDCB#PBF | 2x3 DFN-6 | H | $3.36 | Yes | ||
| LTC4357HDCB#TRMPBF | 2x3 DFN-6 | H | $3.36 | $2.40 | Yes | |
| LTC4357HDCB#TRPBF | 2x3 DFN-6 | H | $3.36 | $2.35 | Yes | |
| LTC4357IDCB#PBF | 2x3 DFN-6 | I | $2.91 | Yes | ||
| LTC4357IDCB#TRMPBF | 2x3 DFN-6 | I | $2.91 | $2.09 | Yes | |
| LTC4357IDCB#TRPBF | 2x3 DFN-6 | I | $2.91 | $2.04 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- N + 1 Redundant Power Supplies
- High Availability Systems
- AdvancedTCA Systems
- Telecom Infrastructure
- Automotive Systems
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Design Tools
LTspice
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LTC4357
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
