Overview
The LTC4368IMS-2#PBF, produced by Analog Devices Inc., is a highly versatile power supply protection controller designed to safeguard applications from a wide range of voltage and current faults. This device protects against overvoltage, undervoltage, and reverse polarity conditions, as well as overcurrent faults in both forward and reverse directions. It is particularly useful in systems requiring robust power supply protection, such as automotive, industrial, and portable instrumentation applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Input Voltage: Operating Range | 2.5 | 60 | V | ||
| VIN Input Voltage: Protection Range | -40 | 100 | V | ||
| Input Supply Undervoltage Lockout (VIN Rising) | 1.8 | 2.2 | 2.4 | V | |
| Input Supply Current: On | SHDN = 2.5V | 80 | µA | ||
| Input Supply Current: Off | SHDN = 2.5V | 5 | µA | ||
| Operating Ambient Temperature Range | -40 | 85 | °C (LTC4368I) | ||
| Storage Temperature Range | -65 | 150 | °C | ||
| Forward Sense Threshold | +50 | mV | |||
| Reverse Sense Threshold (LTC4368-2) | -3 | mV |
Key Features
- Wide Operating Voltage Range: 2.5V to 60V, with overvoltage protection up to 100V and reverse supply protection down to -40V.
- Bidirectional Electronic Circuit Breaker: With adjustable ±1.5% undervoltage and overvoltage thresholds, and sense thresholds of +50mV forward and -3mV reverse (LTC4368-2).
- Low Operating Current: 80µA, and low shutdown current of 5µA.
- Control of Back-to-Back N-Channel MOSFETs: Ensures the load is connected to the input supply only when there are no voltage or current faults.
- Hot Swappable Supply Input: With a 32ms turn-on delay to debounce live supply input connections and block 50Hz and 60Hz AC power.
- Pin-Selectable Overcurrent Auto-Retry Timer or Latchoff: Allows for either latching off power or retrying after a user-adjustable delay).
- AEC-Q100 Qualified for Automotive Applications: Suitable for use in automotive environments).
Applications
- Automotive and Industrial Surge Protection: Protects against various power supply faults in automotive and industrial systems).
- Portable Instrumentation: Ensures reliable power supply protection in portable devices).
- Energy Storage Systems: Provides robust protection against power supply anomalies in energy storage applications).
- Reverse Battery Protection: Safeguards against reverse polarity conditions, which is crucial in many battery-powered systems).
Q & A
- What is the operating voltage range of the LTC4368IMS-2#PBF?
The operating voltage range is from 2.5V to 60V, with protection up to 100V and down to -40V).
- How does the LTC4368IMS-2#PBF protect against reverse polarity?
The device includes a bidirectional electronic circuit breaker with a reverse sense threshold of -3mV (LTC4368-2), ensuring protection against reverse polarity conditions).
- What is the typical operating current of the LTC4368IMS-2#PBF?
The typical operating current is 80µA, and the shutdown current is 5µA).
- How does the LTC4368IMS-2#PBF handle overcurrent faults?
The device can either latch off power or retry after a user-adjustable delay following an overcurrent fault).
- Is the LTC4368IMS-2#PBF suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications).
- What types of packages are available for the LTC4368IMS-2#PBF?
The device is available in 10-pin MSOP and 3mm × 3mm DFN packages).
- How does the LTC4368IMS-2#PBF block AC power?
The device includes a 32ms turn-on delay to debounce live supply input connections and block 50Hz and 60Hz AC power).
- Can the LTC4368IMS-2#PBF be used in hot swap applications?
Yes, it supports hot swappable supply inputs).
- What is the storage temperature range for the LTC4368IMS-2#PBF?
The storage temperature range is from -65°C to 150°C).
- How does the LTC4368IMS-2#PBF handle undervoltage and overvoltage conditions?
The device includes adjustable ±1.5% undervoltage and overvoltage thresholds, and triggers a 32ms recovery delay before the external MOSFETs are turned back on after UV/OV faults).
