Overview
The LTC4354IDDB#TRPBF is a negative voltage diode-OR controller manufactured by Analog Devices Inc. This component is designed to drive two external N-channel MOSFETs, effectively replacing two Schottky diodes and their associated heat sinks. This design significantly reduces power dissipation and saves space in the system. The LTC4354 is particularly useful in applications requiring the ORing of multiple power sources to ensure system reliability and efficiency.
Key Specifications
| Parameter | Value |
|---|---|
| Category | PMIC - OR Controllers, Ideal Diodes |
| Manufacturer | Analog Devices Inc. |
| Description | IC OR CTRLR SRC SELECT 8DFN |
| Package | 8-Lead (3mm x 2mm) Plastic DFN |
| Type | Source Selector Switch |
| Voltage - Supply | -48V to 80V |
| Operating Temperature | -40°C to 85°C |
| Mounting Type | Surface Mount |
| Current - Supply | 1.2 mA |
| FET Type | N-Channel |
| Internal Switch(s) | No |
| Delay Time - OFF | 700 ns |
| Input Voltages DA, DB | -0.3V to 80V |
| FAULT Pin Output Low | 200 mV to 400 mV |
Key Features
- Drives two external N-channel MOSFETs to replace two Schottky diodes and their associated heat sinks, reducing power dissipation and saving space.
- Smooth switchover without oscillation, ensuring reliable operation.
- Less than 1µs turn-off time limits peak fault current.
- Selectable fault thresholds and fault output for monitoring.
- No reverse DC current, enhancing system efficiency.
- Available in 8-Lead (3mm x 2mm) DFN and 8-Lead SO packages.
Applications
- -48V distributed power systems.
- AdvancedTCA® systems.
- Telecom infrastructure and other redundant power supply systems.
- Automotive systems requiring reliable and efficient power management.
Q & A
- What is the LTC4354IDDB#TRPBF used for? The LTC4354IDDB#TRPBF is used as a negative voltage diode-OR controller to drive two external N-channel MOSFETs, replacing Schottky diodes and their heat sinks in power management applications.
- What are the key benefits of using the LTC4354IDDB#TRPBF? The key benefits include reduced power dissipation, smooth switchover without oscillation, and the ability to monitor faults with selectable thresholds.
- What is the operating voltage range of the LTC4354IDDB#TRPBF? The operating voltage range is from -48V to 80V.
- What is the operating temperature range of the LTC4354IDDB#TRPBF? The operating temperature range is from -40°C to 85°C.
- What type of package is the LTC4354IDDB#TRPBF available in? It is available in 8-Lead (3mm x 2mm) Plastic DFN and 8-Lead SO packages.
- How does the LTC4354IDDB#TRPBF handle fault conditions? It has a fault output and selectable fault thresholds, and the MOSFETs are turned off in less than 1µs when a fault is detected.
- What are some common applications of the LTC4354IDDB#TRPBF? Common applications include -48V distributed power systems, AdvancedTCA® systems, telecom infrastructure, and automotive systems.
- How does the LTC4354IDDB#TRPBF reduce power dissipation? It uses N-channel MOSFETs as pass transistors, which significantly reduces power dissipation compared to traditional Schottky diodes.
- What is the supply current of the LTC4354IDDB#TRPBF? The supply current is 1.2 mA.
- How does the LTC4354IDDB#TRPBF ensure smooth switchover? It servos the voltage drop across the pass transistors to ensure smooth transfer of current without oscillation.
