Overview
The LTC4359HDCB#TRMPBF, produced by Analog Devices Inc., is a positive high voltage ideal diode controller designed to drive an external N-channel MOSFET. This device effectively replaces a Schottky diode, offering significant improvements in power consumption, heat dissipation, and voltage loss. It is particularly suited for applications requiring smooth current delivery without oscillation, even at light loads.
The LTC4359 features a wide operating voltage range of 4V to 80V and includes reverse input protection up to –40V. It also has a shutdown mode that reduces the quiescent current to 9µA for load switch applications and 14µA for ideal diode applications. This makes it an ideal choice for demanding environments such as automotive and telecom systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Operating Supply Range (VIN) | 4 | - | 80 | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| Lead Temperature (Soldering, 10 sec) | - | - | 300 | °C |
| Shutdown Current | - | 9 | - | µA |
| Operating Current | - | 150 | - | µA |
| Package Type | - | 6-Pin DFN | - | - |
| Package Dimensions | - | 2mm × 3mm | - | - |
Key Features
- Wide Operating Voltage Range: 4V to 80V, making it versatile for various applications.
- Reverse Input Protection: Up to –40V, ensuring protection against reverse voltage conditions.
- Low Quiescent Current: 9µA in shutdown mode for load switch applications and 14µA for ideal diode applications.
- Smooth Switchover: Ensures smooth current delivery without oscillation, even at light loads.
- High Temperature Rating: Operates from –40°C to 125°C, suitable for demanding environments.
- AEC-Q100 Qualified: Meets the quality and reliability requirements for automotive applications.
- Multiple Package Options: Available in 6-Pin DFN, 8-Lead MSOP, and 8-Lead SO packages.
Applications
- Automotive Systems: Ideal for automotive battery protection and redundant power supplies.
- Telecom Infrastructure: Suitable for systems requiring high reliability and smooth power delivery.
- Computer Systems/Servers: Used in power supply holdup and redundant power supply configurations.
- Solar Systems: Helps in reducing power dissipation and improving overall system efficiency.
Q & A
- What is the primary function of the LTC4359?
The LTC4359 is a positive high voltage ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode.
- What is the operating voltage range of the LTC4359?
The operating voltage range is from 4V to 80V.
- What is the reverse input protection voltage of the LTC4359?
The device offers reverse input protection up to –40V.
- What is the quiescent current in shutdown mode for the LTC4359?
The quiescent current in shutdown mode is 9µA for load switch applications and 14µA for ideal diode applications.
- What are the package options available for the LTC4359?
The LTC4359 is available in 6-Pin DFN, 8-Lead MSOP, and 8-Lead SO packages.
- Is the LTC4359 suitable for automotive applications?
Yes, the LTC4359 is AEC-Q100 qualified and meets the quality and reliability requirements for automotive applications.
- How does the LTC4359 handle power source failures?
The LTC4359 ensures fast turn-off to minimize reverse current transients if a power source fails or is shorted.
- Can the LTC4359 be used in redundant power supply configurations?
Yes, the LTC4359 can easily OR power sources in systems with redundant supplies.
- What is the maximum operating temperature of the LTC4359?
The maximum operating temperature is 125°C.
- How does the LTC4359 reduce power dissipation?
The LTC4359 reduces power dissipation by replacing a power Schottky diode, thereby reducing heat and voltage loss.
