LTC4352 - Low Voltage Ideal Diode Controller with Monitoring
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.
Features
Typical Application  | Applications
Packaging  |
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC4352CDD#PBF | 3x3 DFN-12 | C | $3.57 | $2.50 |
| LTC4352CDD#TRPBF | 3x3 DFN-12 | C | $2.56 | |
| LTC4352CMS#PBF | MS-12 | C | $3.57 | $2.50 |
| LTC4352CMS#TRPBF | MS-12 | C | $2.56 | |
| LTC4352HDD#PBF | 3x3 DFN-12 | H | $4.77 | $3.34 |
| LTC4352HDD#TRPBF | 3x3 DFN-12 | H | $3.40 | |
| LTC4352HMS#PBF | MS-12 | H | $4.77 | $3.34 |
| LTC4352HMS#TRPBF | MS-12 | H | $3.40 | |
| LTC4352IDD#PBF | 3x3 DFN-12 | I | $4.14 | $2.90 |
| LTC4352IDD#TRPBF | 3x3 DFN-12 | I | $2.96 | |
| LTC4352IMS#PBF | MS-12 | I | $4.14 | $2.90 |
| LTC4352IMS#TRPBF | MS-12 | I | $2.96 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC1329A | LTC4352 Low Voltage Ideal Diode Controller with Monitoring, LT4351 Replacement | $50.00 |
- Other
- Ideal Diode Controllers
- 如何选择电源
- LTC4352 - MOSFET 理想二极管控制器在低压应用中为坚固的电源“或”提供快速接通和关断
- MOSFET Ideal Diode Controller Provides Fast Turn-On and Turn-Off for Robust Power Supply ORing in Low Voltage Applications
- LTC4352 Footprints and Symbols
- 宽工作电压范围理想二极管控制器提供负输入保护和低电流工作
- Wide Operating Range Ideal Diode Controller Provides Negative Input Protection & Low Current Operation
- Avoid Debugging Cycles in Power Management for FPGA, GPU and ASIC Systems
- September 2008 - 0V to 18V Ideal Diode Controller Saves Watts and Space over Schottky
- R536 - Reliability Data
- DN549 - Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions
- DN549 - 给 Altera Arria 10 FPGA 和 Arria 10 SoC 供电：经过测试和验证的电源管理解决方案
