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Analog Devices Inc. LTC4365HDDB-1#TRMPBF
- Part No.:
- LTC4365HDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4365HDDB-1#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROTECT 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,170
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Product details
Overview
LTC4365HDDB-1#TRMPBF from Analog Devices is an automotive-grade overvoltage, undervoltage, and reverse supply protection controller for 12V automotive systems. It operates from 2.5V to 34V, withstands –40V to 60V fault conditions, features 1ms fast recovery after UV/OV faults, delivers up to 9.8V gate enhancement to external N-channel MOSFETs, and consumes only 125µA quiescent current during operation.
For engineers reviewing the LTC4365HDDB-1#TRMPBF datasheet, LTC4365HDDB-1#TRMPBF pinout, LTC4365HDDB-1#TRMPBF application, or LTC4365HDDB-1#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive temperature range (–40°C to 125°C), exact DFN package mapping, and two rigorously validated alternative parts with documented functional differences.
Technical Context
The LTC4365HDDB-1#TRMPBF integrates dual precision comparators (0.5V threshold, 25mV hysteresis) for user-adjustable UV and OV setpoints via external resistive dividers, a charge-pump-based gate driver delivering up to 9.8V enhancement referenced to VOUT, and a high-speed reverse-voltage monitor that connects GATE to negative VIN to block reverse current flow through back-to-back N-channel MOSFETs.
It implements a 1ms recovery delay timer (vs. 36ms in standard LTC4365) to enable rapid reconnection after transient faults, supports gentle shutdown via 90µA GATE pull-down with VOUT tracking, and asserts FAULT (open-drain) when SHDN is low, VIN is outside the UV/OV window, or VIN remains below UVLO (2.2V typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - defines minimum startup voltage and maximum continuous input for normal system operation. |
| Fault Protection Range | –40V to 60V - specifies absolute survivability limits against reverse polarity, load dump, or AC coupling transients. |
| UV/OV Threshold Accuracy | ±7.5mV at 0.5V - enables precise 5V–18V or other custom windows using high-value resistor dividers without calibration. |
| Recovery Delay Time | 1ms (LTC4365-1 variant) - ensures fast re-enabling after brief overvoltage spikes while suppressing noise-induced chatter. |
| Quiescent Current | 125µA - allows use in always-on automotive modules without excessive battery drain. |
| Shutdown Current | 10µA - supports ultra-low-power sleep states in infotainment or telematics ECUs. |
| Temperature Range | –40°C to 125°C - qualified per AEC-Q100 Grade H for under-hood and powertrain applications. |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN with exposed pad (pin 9), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Device Ground Reference | Primary return path for internal logic, comparators, and charge pump; must be connected to PCB ground plane. |
| OV (Pin 2) | Overvoltage Comparator Input | Accepts resistive divider tap to set rising-edge fault threshold; 0.5V internal reference, 25mV hysteresis, <10nA leakage. |
| UV (Pin 3) | Undervoltage Comparator Input | Accepts resistive divider tap to set falling-edge fault threshold; 0.5V internal reference, 25mV hysteresis, <10nA leakage. |
| VIN (Pin 4) | Main Power Input | Connects to raw supply (e.g., battery or alternator); handles –40V to 60V fault conditions and 2.5V–34V operating range. |
| SHDN (Pin 5) | Shutdown Control Input | Active-high enable; pulls GATE low and reduces supply current to 10µA when driven <0.4V (typical threshold). |
| FAULT (Pin 6) | Fault Status Output | Open-drain output pulled low during UV/OV fault, SHDN assertion, or VIN < UVLO; requires external pull-up. |
| VOUT (Pin 7) | Output Voltage Sense | Senses voltage at load side of external MOSFETs; serves as charge pump reference and enables reverse protection logic. |
| GATE (Pin 8) | N-Channel MOSFET Gate Driver | Drives gate of external N-MOSFET(s); provides up to 9.8V enhancement above VOUT and fast 50mA pull-down on fault. |
Key Features
| Feature | Design Value |
|---|---|
| Fast 1ms Recovery Timer | Enables immediate reconnection after short-duration transients (e.g., ignition pulses), unlike 36ms standard version. |
| Charge-Pump Gate Drive | Delivers up to 9.8V gate enhancement referenced to VOUT, enabling use of low-RDS(on) N-channel MOSFETs instead of costly P-channel devices. |
| Reverse Supply Protection | Automatically connects GATE to negative VIN to turn off back-to-back N-MOSFETs, blocking –40V reverse current without external diodes or controllers. |
| AEC-Q100 Qualified (Grade H) | Validated for –40°C to 125°C ambient operation with full reliability testing-suitable for engine control, ADAS, and body electronics. |
| No External TVS or Capacitor Required | Internal robustness eliminates need for input TVS diodes or bulk capacitors in most 12V automotive surge scenarios, reducing BOM count and board area. |
Applications
| Automotive Load Dump Protection | Industrial PLC Power Input Protection |
|---|---|
Use Scenario: Protecting infotainment head units from ISO 7637-2 Pulse 5a (load dump up to 60V, 100ms duration) in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Overvoltage protection controller that disables external N-MOSFETs within 2µs of OV detection and recovers in 1ms once voltage returns to safe window. Use Value: Prevents damage to downstream DC/DC converters and microcontrollers without requiring oversized TVS or derated MOSFETs. | Use Scenario: Securing programmable logic controller (PLC) I/O modules powered from unregulated 24V industrial supplies subject to brownouts and polarity reversal. IC Role / Device Role / Timing Role: Dual-threshold (UV/OV) supervisor and reverse-polarity blocker controlling back-to-back N-MOSFETs in main power rail. Use Value: Eliminates need for series Schottky diodes (reducing 0.3V drop and heat) while ensuring operation down to 2.5V and survival to –40V. |
| Laptop Adapter Input Protection | Portable Medical Device Power Management |
Use Scenario: Safeguarding USB-C PD-powered laptops against incorrect wall adapters (e.g., 20V applied to 5V-only port) or reversed polarity connections. IC Role / Device Role / Timing Role: Precision window comparator and gate driver that disconnects load within 1µs of UV/OV violation and blocks reverse current automatically. Use Value: Enables use of compact, low-RDS(on) N-MOSFETs instead of lossy P-MOSFETs, improving efficiency and thermal performance in space-constrained designs. | Use Scenario: Ensuring reliable power sequencing in portable ultrasound or ECG monitors powered by removable Li-ion batteries and external chargers. IC Role / Device Role / Timing Role: Fault-tolerant input supervisor that enforces 3.0V–4.2V battery-safe window and prevents reverse current flow during hot-swap battery replacement. Use Value: Guarantees zero reverse leakage (<10nA) and maintains <10µA shutdown current to maximize battery runtime between charges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage, undervoltage, and reverse supply protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365HDDB#TRMPBF | 36ms recovery delay (vs. 1ms); identical package, temp grade, and protection ranges. | Suitable for applications where slower reconnection is acceptable (e.g., non-real-time sensors), but not for fast-transient environments like start-stop systems. | Select LTC4365HDDB-1#TRMPBF when 1ms recovery is required; choose LTC4365HDDB#TRMPBF for cost-sensitive, less dynamic applications. |
| TPS26631PWPR | Integrated 60V N-channel MOSFET; fixed 6.5V UV/28V OV thresholds; no adjustable resistive divider support. | Targeted at simpler, fixed-threshold applications (e.g., USB PD accessories); lacks reverse protection and automotive temp grade. | Choose TPS26631PWPR only if fixed thresholds and integrated FET are acceptable; LTC4365HDDB-1#TRMPBF offers design flexibility and AEC-Q100 compliance. |
Compared with LTC4365HDDB#TRMPBF, the -1 variant trades longer fault-hold time for faster system recovery-critical in automotive start-stop cycles-while TPS26631PWPR sacrifices configurability and reverse protection for integration and lower component count in consumer-grade designs.
Availability
LTC4365HDDB-1#TRMPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial PLC power input protection, and portable medical device power management requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC4365HDDB-1#TRMPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4365 family is designed specifically for ruggedized input protection in harsh environments-delivering precise UV/OV window control, reverse polarity blocking, and fast-recovery fault response in compact DFN and TSOT packages.
FAQ
What is the key functional difference between LTC4365HDDB-1#TRMPBF and LTC4365HDDB#TRMPBF?
The LTC4365HDDB-1#TRMPBF features a 1ms recovery delay after UV/OV faults, whereas the LTC4365HDDB#TRMPBF uses a 36ms delay. This makes the -1 variant suitable for automotive start-stop systems and other applications requiring rapid reconnection after transient overvoltages. Both share identical operating range (2.5V–34V), fault tolerance (–40V to 60V), package, and AEC-Q100 Grade H qualification.
Does LTC4365HDDB-1#TRMPBF require external components for basic overvoltage and undervoltage protection?
Yes-LTC4365HDDB-1#TRMPBF requires external N-channel MOSFETs (typically back-to-back configuration) and a resistive divider network on UV/OV pins to set custom thresholds. However, it does not require external TVS diodes, input capacitors, or Schottky diodes for reverse protection in most 12V automotive applications, thanks to its integrated charge pump and reverse-voltage monitoring circuitry.
What is the role of the VOUT pin on LTC4365HDDB-1#TRMPBF, and why is it necessary?
The VOUT pin on LTC4365HDDB-1#TRMPBF senses the voltage at the load side of the external MOSFETs and serves as the reference for the internal charge pump. This enables gate drive relative to the output rail-not input-ensuring proper N-MOSFET enhancement even during reverse or low-VIN conditions. It is essential for correct reverse protection behavior and accurate gate-to-source voltage control.
Can LTC4365HDDB-1#TRMPBF protect against both positive and negative voltage transients?
Yes-LTC4365HDDB-1#TRMPBF protects against positive transients up to +60V (overvoltage) and negative transients down to –40V (reverse polarity). Its reverse protection circuit actively connects the GATE pin to negative VIN, forcing back-to-back N-MOSFETs into cutoff. This capability eliminates the need for external reverse-blocking diodes in automotive and industrial power inputs.
Is LTC4365HDDB-1#TRMPBF pin-compatible with other variants in the LTC4365 family?
Yes-LTC4365HDDB-1#TRMPBF is pin-compatible with all 8-lead DFN variants of the LTC4365 family, including LTC4365HDDB#TRMPBF, LTC4365IDDB-1#TRMPBF, and LTC4365CDDB-1#TRMPBF. The same PCB layout supports all variants; only the temperature grade and recovery timing differ. No layout changes are needed when upgrading from commercial or industrial grades to the automotive H-grade -1 variant.
LTC4365HDDB-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 125µA
- Voltage - Supply:
- 2.5V ~ 34V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC4365HDDB-1#TRMPBF FAQ
1.How can I place an order for LTC4365HDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365HDDB-1#TRMPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC4365HDDB-1#TRMPBF reliable?
The price and inventory of LTC4365HDDB-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365HDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365HDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365HDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365HDDB-1#TRMPBF?
LTC4365HDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365HDDB-1#TRMPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC4365HDDB-1#TRMPBF?
For technical support, including LTC4365HDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365HDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4365HDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365HDDB-1#TRMPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC4365HDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365HDDB-1#TRMPBF?
All LTC4365HDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365HDDB-1#TRMPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC4365HDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365HDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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