Overview
The LTC4415IMSE#TRPBF, produced by Analog Devices Inc., is a dual 4A ideal diode integrated circuit. This device contains two monolithic PowerPath ideal diodes, each capable of supplying up to 4A with a typical forward conduction resistance of 50mΩ. It is designed for power supply ORing applications, ensuring minimal voltage drops and preventing oscillations during supply switchover. The LTC4415 is available in various packages, including the 16-Lead Plastic MSOP package for the IMSE variant, and operates over a wide temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Operating Supply Range | At Least One Input/Output Must Be in This Range | 1.7 | 5.5 | V | |
| Forward Regulation Voltage (VINx – VOUTx) | IOUTx = –1mA | 5 | 25 | mV | |
| Reverse Turn-Off Voltage (VINx – VOUTx) | –50 | –30 | –10 | mV | |
| Forward Dynamic Resistance in Regulation | IOUTx = –100mA to –300mA | 18 | 30 | mΩ | |
| On-Resistance in Constant Resistance Mode | IOUTx = –1A | 50 | 70 | mΩ | |
| PowerPath Turn-On Time | Before Enable VOUTx = 1.5V | 10 | 250 | µs | |
| Thermal Shutdown Threshold | Rising Temperature | 160 | °C | ||
| Open-Drain Output Low Voltage | Current Into Open-Drain Output = 3mA | 0.05 | 0.4 | V |
Key Features
- Dual 4A Ideal Diodes: Each diode can supply up to 4A with a typical forward conduction resistance of 50mΩ.
- Adjustable Current Limit: The output current limits can be adjusted independently from 0.5A to 4A using resistors on the CLIM pins.
- Independent Enable and Prioritization: The diodes are enabled using level-sensitive enable inputs EN1 and EN2, allowing for prioritization with minimal quiescent current.
- Low Reverse Current: Less than 1µA of reverse current flows from OUT to IN, making it suitable for power supply ORing applications.
- Open-Drain Status Outputs: Indicate when the ideal diodes are forward conducting or in overcurrent conditions.
- Thermal Shutdown Protection: Protects the device during momentary overload conditions.
Applications
- Power Supply ORing: Ideal for applications where multiple power sources need to be combined without significant voltage drops.
- Hot Swap and Redundant Power Systems: Suitable for systems requiring seamless power switchover and redundancy.
- High-Current Power Distribution: Used in systems that require high current handling with low forward voltage drop.
- Power Management in Industrial and Automotive Systems: Applicable in various industrial and automotive applications requiring reliable power management.
Q & A
- What is the maximum current each ideal diode in the LTC4415 can supply?
Each ideal diode in the LTC4415 can supply up to 4A.
- What is the typical forward conduction resistance of the LTC4415?
The typical forward conduction resistance is 50mΩ.
- How can the current limit be adjusted for each diode?
The current limit can be adjusted independently from 0.5A to 4A using resistors on the CLIM pins.
- What is the operating temperature range of the LTC4415IMSE#TRPBF?
The operating temperature range is –40°C to 125°C.
- What is the purpose of the open-drain status outputs?
The open-drain status outputs indicate when the ideal diodes are forward conducting or in overcurrent conditions.
- Does the LTC4415 have thermal shutdown protection?
Yes, the LTC4415 includes overtemperature protection to protect the device during momentary overload conditions.
- How do you enable the ideal diodes in the LTC4415?
The diodes are enabled using level-sensitive enable inputs EN1 and EN2.
- What is the reverse current from OUT to IN in the LTC4415?
Less than 1µA of reverse current flows from OUT to IN.
- Can the LTC4415 be used in hot swap and redundant power systems?
Yes, it is suitable for systems requiring seamless power switchover and redundancy.
- What package types are available for the LTC4415?
The LTC4415 is available in 16-Lead Plastic DFN and 16-Lead Plastic MSOP packages.
