Overview
The LTC4365IDDB#TRPBF from Analog Devices is a highly versatile and robust overvoltage, undervoltage, and reverse supply protection controller. This device is designed to protect applications from power supply input voltages that may be too high, too low, or even negative. It achieves this by controlling the gate voltages of external N-channel MOSFETs to ensure the output stays within a safe operating range.
The LTC4365 is particularly useful in environments where power supply stability is critical, such as in automotive, industrial automation, and portable instrumentation applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Input Voltage Range | Operating Range | 2.5 | 34 | V | |
| VIN Input Voltage Range | Protection Range | -40 | 60 | V | |
| Input Supply Current (IVIN) | SHDN = 0V, VIN = VOUT, -40°C to 85°C | 10 | 25 | 50 | µA |
| Shutdown Current (ISHDN) | SHDN = 0.75V, VIN = 34V | ±10 | nA | ||
| Shutdown Threshold (VSHDN) | Falling to ΔVGATE = 0V | 0.4 | 0.75 | 1.2 | V |
| Fault Propagation Delay (tFAULT) | Overdrive = 50mV, VIN = VOUT = 12V | 1 | 2 | µs | |
| Turn-On Delay (tSTART) | Coming Out of Shutdown Mode, SHDN Rising to ΔVGATE > 0V, VIN = VOUT = 12V | 400 | 800 | 1200 | µs |
Key Features
- Wide Operating Voltage Range: 2.5V to 34V
- Overvoltage Protection: Up to 60V
- Reverse Supply Protection: Up to -40V
- AC Power Blocking: Blocks 50Hz and 60Hz AC power
- Fast Recovery from Fault: LTC4365-1 has a 1ms recovery time
- No Input Capacitor or TVS Required: For most applications
- Adjustable Undervoltage and Overvoltage Protection Range: Using an external resistive divider
- Charge Pump Enhancement: For external N-channel MOSFETs
- Low Operating Current: 125µA
- Low Shutdown Current: 10µA
- Compact Packaging: 8-Lead, 3mm × 2mm DFN and TSOT-23 packages
- AEC-Q100 Qualified for Automotive Applications: Ensures reliability in automotive environments
Applications
- Automotive Systems: Protects against reverse and overvoltage conditions in automotive applications.
- Industrial Automation: Ensures stable power supply in industrial automation systems.
- Portable Instrumentation: Protects portable devices from voltage fluctuations.
- Laptops and Other Mobile Devices: Provides robust power supply protection for mobile electronics.
Q & A
- What is the operating voltage range of the LTC4365?
The LTC4365 operates within a voltage range of 2.5V to 34V.
- What is the maximum overvoltage protection provided by the LTC4365?
The LTC4365 provides overvoltage protection up to 60V.
- Does the LTC4365 require an input capacitor or TVS for most applications?
No, the LTC4365 does not require an input capacitor or TVS for most applications.
- How does the LTC4365 enhance external N-channel MOSFETs?
The LTC4365 includes a charge pump that enhances the external N-channel MOSFETs.
- What is the typical operating current of the LTC4365?
The typical operating current of the LTC4365 is 125µA.
- What is the shutdown current of the LTC4365?
The shutdown current of the LTC4365 is 10µA.
- What are the package options available for the LTC4365?
The LTC4365 is available in 8-Lead, 3mm × 2mm DFN and TSOT-23 packages.
- Is the LTC4365 qualified for automotive applications?
Yes, the LTC4365 is AEC-Q100 qualified for automotive applications.
- How does the LTC4365 block AC power?
The LTC4365 blocks 50Hz and 60Hz AC power.
- What is the recovery time from fault for the LTC4365-1?
The LTC4365-1 has a fast recovery time of 1ms from fault.
