Overview
The LTC4365ITS8-1#TRPBF, manufactured by Analog Devices Inc., is a highly versatile 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 LTC4365ITS8-1#TRPBF is particularly useful in environments where voltage stability is critical, such as automotive systems, industrial automation, and portable instrumentation.
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 |
| IVIN Input Supply Current | SHDN = 0V, VIN = VOUT, -40°C to 85°C | 10 | 125 | 150 | µA |
| IVIN Input Supply Current | SHDN = 0V, VIN = VOUT, -40°C to 125°C | 10 | 125 | 150 | µA |
| ISHDN SHDN Input Current | SHDN = 0.75V, VIN = 34V | ±10 | - | - | nA |
| tFAULT UV, OV Fault Propagation Delay | Overdrive = 50mV, VIN = VOUT = 12V | 1 | 2 | - | µs |
| tSTART Delay Coming Out of Shutdown Mode | SHDN Rising to ΔVGATE > 0V, VIN = VOUT = 12V | 400 | 800 | 1200 | µs |
| tSHDN(F) SHDN to FAULT Asserted | VIN = VOUT = 12V | 1.5 | 3 | - | µs |
Key Features
- Wide Operating Voltage Range: 2.5V to 34V with protection up to 60V and reverse protection to -40V.
- Adjustable Undervoltage and Overvoltage Protection Range: Configurable using an external resistive divider.
- Charge Pump Enhances External N-Channel MOSFET: Improves the performance of the external MOSFETs.
- Low Operating Current: 125µA in normal operation and 10µA in shutdown mode.
- Compact Packaging: Available in 8-Lead, 3mm × 2mm DFN and TSOT-23 packages.
- Fast Recovery from Fault: The LTC4365-1 version has a fast recovery time of 1ms.
- No Input Capacitor or TVS Required for Most Applications: Simplifies the design and reduces component count.
- AEC-Q100 Qualified for Automotive Applications: Suitable for use in automotive systems.
Applications
- Automotive Systems: Protects against overvoltage, undervoltage, and reverse supply conditions in automotive applications.
- Industrial Automation: Ensures reliable operation in industrial environments where voltage stability is crucial.
- Portable Instrumentation: Suitable for use in portable devices that require robust voltage protection.
- Laptops and Other Mobile Devices: Provides protection against voltage fluctuations and surges.
Q & A
- What is the operating voltage range of the LTC4365ITS8-1#TRPBF?
The operating voltage range is from 2.5V to 34V, with protection up to 60V and reverse protection to -40V.
- How does the LTC4365ITS8-1#TRPBF protect against overvoltage and undervoltage conditions?
It uses adjustable thresholds set by an external resistive divider to control the gate voltages of external N-channel MOSFETs.
- What is the typical operating current of the LTC4365ITS8-1#TRPBF?
The typical operating current is 125µA, and it drops to 10µA in shutdown mode.
- Does the LTC4365ITS8-1#TRPBF require an input capacitor or TVS for most applications?
No, it does not require an input capacitor or TVS for most applications, simplifying the design.
- What are the package options available for the LTC4365ITS8-1#TRPBF?
It is available in 8-Lead, 3mm × 2mm DFN and TSOT-23 packages.
- Is the LTC4365ITS8-1#TRPBF qualified for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- How fast is the recovery from fault in the LTC4365-1 version?
The recovery time from fault in the LTC4365-1 version is 1ms.
- What is the purpose of the charge pump in the LTC4365ITS8-1#TRPBF?
The charge pump enhances the performance of the external N-channel MOSFETs.
- Can the LTC4365ITS8-1#TRPBF block AC power?
Yes, it can block 50Hz and 60Hz AC power.
- What is the delay coming out of shutdown mode for the LTC4365ITS8-1#TRPBF?
The delay coming out of shutdown mode is between 400µs to 1200µs.
