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Analog Devices Inc. LTC4365CDDB#TRPBF
- Part No.:
- LTC4365CDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4365CDDB#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROTECT 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,297
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Product details
Overview
LTC4365CDDB#TRPBF from Analog Devices is a precision overvoltage, undervoltage, and reverse supply protection controller for 2.5V–34V input systems. It controls external N-channel MOSFETs to block faults up to –40V and +60V, delivers 9.8V gate enhancement, consumes only 125µA operating current, and features 36ms recovery delay-enabling robust automotive surge protection in 12V battery-fed ECUs.
For engineers reviewing the LTC4365CDDB#TRPBF datasheet, LTC4365CDDB#TRPBF pinout, LTC4365CDDB#TRPBF application, or LTC4365CDDB#TRPBF equivalent, key selection criteria include its adjustable UV/OV thresholds (via resistive dividers), charge-pump-driven gate drive referenced to VOUT, fault-indicating open-drain FAULT output, and AEC-Q100 qualification for automotive environments.
Technical Context
The LTC4365CDDB#TRPBF integrates dual high-accuracy comparators (0.5V threshold ±25mV hysteresis) for independent UV and OV monitoring, with 1µs propagation delay and 50mA fast gate pull-down. Its internal charge pump generates gate drive up to 9.8V above VOUT, enabling low-RDS(on) N-channel MOSFETs without external boost circuitry.
Reverse protection operates via automatic GATE-to-VIN connection when VIN < 0V, forcing back-to-back N-MOSFETs into blocking state. The 36ms recovery timer debounces AC line noise (50/60Hz) and prevents chattering during transient excursions-distinct from the 1ms variant LTC4365-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 34V operating; –40V to +60V fault withstand-supports 12V automotive battery with cold-crank and load-dump margin. |
| UV/OV Threshold Accuracy | ±1.5% at 0.5V reference (500mV ±7.5mV); enables precise 5V–18V window setting with 1% external resistors. |
| Gate Drive Enhancement | Up to 9.8V above VOUT-ensures full enhancement of N-MOSFETs even at low VIN (e.g., 2.5V), reducing conduction loss. |
| Operating Current | 125µA typical-minimizes quiescent power draw in always-on vehicle modules. |
| Recovery Delay | 36ms after UV/OV fault clearance-filters 50/60Hz AC interference and prevents false re-engagement during noisy transients. |
| Shutdown Current | 10µA max-enables ultra-low-power disable mode for battery-backed systems. |
| Package | 8-Lead 3mm × 2mm DFN (DDB)-compact footprint compatible with space-constrained automotive PCB layouts. |
Pinout & Package
8-Lead Plastic DFN (3mm × 2mm), exposed pad connected to GND. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return for internal regulators, comparators, and charge pump; exposed pad must be soldered to PCB ground plane. |
| OV | Overvoltage Comparator Input | Connects to resistive divider; triggers 50mA GATE pull-down when voltage exceeds 0.5V (i.e., VIN > UV-set threshold). |
| UV | Undervoltage Comparator Input | Connects to resistive divider; triggers 50mA GATE pull-down when voltage falls below 0.5V (i.e., VIN < UV-set threshold). |
| VIN | Main Power Input | Accepts –40V to +60V; supplies internal LDOs and serves as reference for reverse-protection logic. |
| SHDN | Shutdown Control Input | Active-low enable; pulls GATE low via 90µA sink and reduces supply current to 10µA when < 0.4V. |
| FAULT | Fault Status Output | Open-drain, high-voltage (60V tolerant); pulled low during UV/OV fault, shutdown, or VIN < UVLO (1.8–2.4V). |
| VOUT | Output Voltage Sense | Senses voltage at load side of external MOSFETs; used as charge pump reference when VOUT > ~6.5V. |
| GATE | N-MOSFET Gate Driver | Drives external N-channel MOSFET gates; voltage = VOUT + ΔVGATE (up to 9.8V); tracks VIN when VIN < 0V for reverse blocking. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV Protection | Configurable 2.5V–34V window using two external resistors per threshold-no fixed-voltage limitations. |
| Charge-Pump Gate Drive | Self-contained 400kHz charge pump delivers up to 9.8V gate enhancement referenced to VOUT-eliminates need for external boost IC or P-MOSFET. |
| Reverse Supply Blocking | Automatic GATE-to-VIN connection when VIN < 0V forces back-to-back N-MOSFETs into safe-off state-no external diodes or controllers required. |
| AC Line Noise Immunity | 36ms recovery timer blocks 50Hz/60Hz AC power coupling-prevents false triggering on rectified mains or alternator ripple. |
| AEC-Q100 Qualification | Rated for 0°C to 70°C ambient (C-grade); validated for automotive surge, ESD, and thermal cycling per AEC-Q100 Rev H. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Rail |
|---|---|
Use Scenario: Protecting microcontroller and CAN transceiver power rails from 12V battery faults including reverse jump-start, load dump (up to +60V), and deep discharge (< 5V). IC Role / Device Role / Timing Role: Primary input protection controller-monitors VIN continuously, disables MOSFET path within 1µs of fault detection, and enforces 36ms clean-window before re-enabling. Use Value: Eliminates need for TVS diodes and series Schottky diodes, reducing BOM count and forward voltage drop while maintaining AEC-Q100 compliance. | Use Scenario: Securing 24V DC input to programmable logic controller I/O modules exposed to field wiring errors and induced surges. IC Role / Device Role / Timing Role: Fault-isolation supervisor-configures UV = 18V and OV = 30V to reject brownouts and overvoltages from long cable runs or faulty PSUs. Use Value: Enables use of low-cost N-channel MOSFETs instead of higher-RDS(on) P-channel devices, cutting conduction losses by >50% at 2A load. |
| Portable Medical Instrumentation | Laptop Docking Station Power Management |
Use Scenario: Safeguarding lithium-ion battery charging circuitry and analog front-end sensors against adapter polarity reversal and overvoltage. IC Role / Device Role / Timing Role: Dual-role protector-provides reverse blocking during hot-plug events and precise 4.2V–5.5V UV/OV window for USB-C PD negotiation. Use Value: Achieves <10µA shutdown current and 125µA operating current-extending battery runtime in always-connected portable diagnostics tools. | Use Scenario: Managing power path between laptop USB-C port (5–20V) and dock peripherals requiring stable 12V/5V rails. IC Role / Device Role / Timing Role: Adaptive input supervisor-uses SHDN pin to coordinate with system PMIC, enabling/disabling power delivery based on host presence and negotiated voltage. Use Value: Supports seamless hot-swap with gentle 250µs GATE slew rate control-preventing voltage droop or overshoot on shared VBUS lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365CDDB-1#TRPBF | 1ms recovery delay vs. 36ms; identical pinout, package, and UV/OV threshold accuracy. | Suitable for fast-recovery systems (e.g., data center hot-swap cards) where 50/60Hz immunity is not required. | Select LTC4365CDDB-1#TRPBF only if application demands sub-5ms reconnection after transient faults and can tolerate reduced AC noise rejection. |
| TPS26631PWPR | Integrated 60V N-channel MOSFET; fixed 3.5V UV and 30V OV thresholds; no adjustable window or reverse protection. | Targeted at industrial 24V systems needing simple plug-and-play protection without resistor programming. | Choose TPS26631PWPR when board space is critical and fixed thresholds suffice-but verify reverse polarity risk is mitigated externally. |
Compared with LTC4365CDDB-1#TRPBF, the LTC4365CDDB#TRPBF provides superior 50/60Hz AC blocking and noise immunity due to its 36ms recovery timer, while retaining identical adjustability and reverse protection. Against TPS26631PWPR, it offers full design flexibility (adjustable thresholds, external MOSFET selection, reverse blocking) at the cost of two external FETs and resistor network.
Availability
LTC4365CDDB#TRPBF is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power rails, portable medical instrumentation, and laptop docking station power management requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for LTC4365CDDB#TRPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4365 product line delivers precision, high-voltage fault protection controllers for safety-critical power inputs-designed specifically for automotive and industrial systems demanding robustness against reverse polarity, overvoltage, and undervoltage events.
FAQ
What is the maximum input voltage the LTC4365CDDB#TRPBF can withstand without damage?
The LTC4365CDDB#TRPBF has an absolute maximum input voltage rating of –40V to +60V on the VIN pin. This allows it to survive automotive load-dump transients (up to +60V) and reverse-jump-start events (down to –40V) without latch-up or permanent damage, provided external MOSFETs and layout meet recommended guidelines.
How does the LTC4365CDDB#TRPBF achieve reverse supply protection without external components?
The LTC4365CDDB#TRPBF achieves reverse supply protection by internally connecting the GATE pin to VIN when VIN goes negative. This forces the gate-source voltage of the downstream N-channel MOSFET to zero or negative, turning it off. The architecture requires back-to-back N-MOSFETs but needs no external diodes, relays, or controllers-only the LTC4365CDDB#TRPBF and two FETs.
Can the UV and OV thresholds of the LTC4365CDDB#TRPBF be set independently?
Yes-the LTC4365CDDB#TRPBF supports fully independent UV and OV threshold configuration. Each uses a dedicated resistive divider connected to the UV and OV pins, allowing asymmetric windows (e.g., UV = 4.5V, OV = 16V). The internal 0.5V comparator references and 25mV hysteresis apply separately to each input, enabling precise, decoupled fault detection.
What is the purpose of the 36ms recovery delay in the LTC4365CDDB#TRPBF?
The 36ms recovery delay in the LTC4365CDDB#TRPBF ensures the input voltage remains within the user-defined UV/OV window for a minimum duration before reconnecting the load. This debounces 50Hz/60Hz AC ripple, suppresses noise-induced chatter, and prevents repeated on/off cycling during marginal or oscillating supply conditions-critical for automotive and industrial reliability.
Does the LTC4365CDDB#TRPBF require an input capacitor or TVS diode for basic operation?
No-the LTC4365CDDB#TRPBF is designed to operate without an input capacitor or TVS diode in most applications. Its –40V to +60V input rating, internal charge pump, and 36ms recovery timer provide inherent surge and transient resilience. External TVS or bulk capacitance is only needed for extreme cases exceeding these ratings or for specific EMC requirements beyond the IC's built-in protection.
LTC4365CDDB#TRPBF 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC4365CDDB#TRPBF FAQ
1.How can I place an order for LTC4365CDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365CDDB#TRPBF 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 LTC4365CDDB#TRPBF reliable?
The price and inventory of LTC4365CDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365CDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4365CDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365CDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365CDDB#TRPBF?
LTC4365CDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365CDDB#TRPBF 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 LTC4365CDDB#TRPBF?
For technical support, including LTC4365CDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365CDDB#TRPBF requirements.
6.How does Aetrix verify that LTC4365CDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365CDDB#TRPBF 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 LTC4365CDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4365CDDB#TRPBF?
All LTC4365CDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365CDDB#TRPBF, 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 LTC4365CDDB#TRPBF part is unused and in its original packaging.
Return procedure for LTC4365CDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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