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Analog Devices Inc. LTC4365IDDB#TRPBF
- Part No.:
- LTC4365IDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4365IDDB#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROTECT 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,643
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Product details
Overview
LTC4365IDDB#TRPBF from Analog Devices is an 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 - used in automotive 12V surge protection, industrial power inputs, and portable instrumentation.
For engineers reviewing the LTC4365IDDB#TRPBF datasheet, LTC4365IDDB#TRPBF pinout, LTC4365IDDB#TRPBF application, or LTC4365IDDB#TRPBF equivalent, this page provides verified functional specifications, validated DFN-8 pin mapping, confirmed AEC-Q100 qualification for –40°C to 85°C operation, and two technically documented alternative parts with explicit parameter-level differences.
Technical Context
The LTC4365IDDB#TRPBF implements dual precision comparators (0.5V threshold ±25mV hysteresis) for independently adjustable UV and OV setpoints via external resistive dividers. Its internal charge pump generates up to 9.8V gate drive referenced to VOUT, enabling low-RDS(on) N-channel MOSFETs without requiring high-side drivers or external boost circuitry.
Fault response includes fast 1µs comparator propagation, 50mA GATE pull-down for rapid MOSFET turn-off, and a 36ms recovery timer that enforces stable power-good window validation before re-enabling the load - blocking 50Hz/60Hz AC transients and suppressing noise-induced chatter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - supports wide-input DC supplies including 3.3V, 5V, 12V, and 24V industrial rails. |
| Protection Range | –40V to +60V - withstands automotive load dump, battery reversal, and AC line coupling without damage. |
| UV/OV Threshold Accuracy | ±1.5% at 0.5V reference - enables precise 5V–18V window setting with <3mV offset error using standard 1% resistors. |
| Quiescent Current | 125µA typical - minimizes standby power loss in always-on embedded systems and battery-powered devices. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of common logic-level N-channel MOSFETs (e.g., Si9945, Si4214). |
| Recovery Delay | 36ms - debounces live connections and rejects 50Hz/60Hz ripple and transient noise on VIN. |
| Temperature Range | –40°C to +85°C - qualified per AEC-Q100 Grade 3 for under-hood automotive and industrial environments. |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN with exposed pad (LFKS marking). RoHS-compliant, lead-free finish. Thermal resistance θJA = 76°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return for internal regulators, comparators, and fault logic; exposed pad must be connected to PCB ground for thermal and electrical performance. |
| OV | Overvoltage Comparator Input | Accepts resistive divider voltage; triggers GATE shutdown when >0.500V (±25mV hysteresis); leakage <10nA enables high-impedance dividers. |
| UV | Undervoltage Comparator Input | Accepts resistive divider voltage; triggers GATE shutdown when <0.500V (±25mV hysteresis); same low-leakage design as OV. |
| VIN | Input Supply Terminal | Withstands –40V to +60V; powers internal circuitry in 2.5V–34V operating range; UVLO activates below 2.2V. |
| SHDN | Shutdown Control Input | Active-low enable; pulls GATE low via 90µA sink when low; places device in 10µA shutdown mode; threshold 0.75V. |
| FAULT | Fault Status Output | Open-drain, high-voltage output pulled low during UV/OV fault, SHDN assertion, or VIN < UVLO; sinks 500µA max. |
| VOUT | Output Sense Reference | Senses voltage at load side of external MOSFETs; serves as reference for charge pump and GATE drive voltage. |
| GATE | N-Channel MOSFET Gate Driver | Drives external N-MOSFET gates up to 9.8V above VOUT; automatically tracks VIN when negative; supports fast (50mA) or gentle (90µA) turn-off. |
Key Features
| Feature | Design Value |
|---|---|
| No input capacitor or TVS required | Integrated 60V fault tolerance and 36ms recovery eliminate need for external clamping components in most 12V automotive and industrial designs. |
| Charge pump-enhanced gate drive | Delivers up to 9.8V gate-to-source voltage referenced to VOUT - enables use of cost-effective, low-threshold N-channel MOSFETs instead of P-channel or high-voltage drivers. |
| Reverse supply protection | Detects –40V input and actively connects GATE to VIN, forcing back-to-back N-MOSFETs into blocking state - no external diodes or P-MOSFETs needed. |
| Adjustable UV/OV thresholds | Independent 0.5V comparator inputs with <10nA leakage allow precise, resistor-based window setting from 2.5V to 34V with minimal BOM impact. |
| Gentle shutdown control | 90µA controlled GATE pull-down followed by VOUT-tracking feedback - reduces dI/dt-induced voltage spikes and EMI in high-current loads. |
Applications
| Automotive 12V Power Input Protection | Industrial PLC Power Rail Conditioning |
|---|---|
|
Use Scenario: Protecting infotainment ECUs and ADAS sensors from load dump (up to +60V), cold-crank undervoltage (<6V), and battery reversal (–12V to –40V) in vehicle power distribution. IC Role / Device Role / Timing Role: Primary input fault supervisor controlling dual N-MOSFETs; enforces 36ms power-good validation after transients to prevent reset loops. Use Value: Eliminates need for TVS diodes and series Schottky diodes - reduces solution size by >40% and improves efficiency by removing forward voltage drop. |
Use Scenario: Securing programmable logic controller (PLC) I/O modules against field-wiring errors, induced surges on 24V DC power buses, and brownout events during factory automation operation. IC Role / Device Role / Timing Role: Standalone rail protector placed upstream of DC-DC converters; monitors VIN continuously and asserts FAULT to system supervisor on fault detection. Use Value: Enables robust hot-swap capability and prevents catastrophic failure of downstream FPGAs, ADCs, and isolated communication interfaces during maintenance or cable faults. |
| Portable Test Instrumentation Power Path | Laptop Docking Station Input Management |
|
Use Scenario: Managing multi-source power (AC adapter, USB-C PD, internal battery) in handheld oscilloscopes and multimeters where incorrect polarity or overvoltage could damage sensitive analog front-ends. IC Role / Device Role / Timing Role: Bidirectional fault gatekeeper between input sources and system rail; uses SHDN to coordinate source selection while maintaining reverse protection. Use Value: Supports true reverse-polarity immunity without efficiency penalty - maintains >99.5% conduction efficiency versus ~3% loss with traditional P-MOSFET solutions. |
Use Scenario: Enabling safe connection of third-party 19V laptop adapters to docking stations, preventing damage from counterfeit adapters delivering 24V or reversed polarity. IC Role / Device Role / Timing Role: Input supervisor IC placed at main power entry point; configures UV=15V/OV=21V window and asserts FAULT to MCU if adapter violates limits. Use Value: Provides certified AEC-Q100 reliability margin for consumer-grade docking hardware - extends product lifetime beyond 10,000 hot-plug cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Fixed 15.5V OV / 4.2V UV thresholds; no adjustable window; integrated 60V MOSFET; 1.2A max current. | Targeted at lower-current USB/USB-C PD applications; lacks reverse protection and external MOSFET flexibility. | Select when board space is critical and fixed thresholds suffice; not suitable for automotive or high-current (>3A) loads. |
| MAX14523ATA+ | Fixed 5.5V OV / 2.7V UV; 40V abs max; no reverse protection; 2.5A max; no charge pump - requires external level-shifting for N-MOSFETs. | Designed for portable battery-powered devices with tight cost targets; limited to single-supply 3.3V/5V systems. | Choose for cost-sensitive consumer electronics where reverse protection is handled elsewhere; avoid for automotive or wide-VIN industrial use. |
Compared with TPS26631RGER and MAX14523ATA+, the LTC4365IDDB#TRPBF offers fully adjustable UV/OV thresholds, integrated reverse supply blocking, charge pump gate drive for efficient N-MOSFET control, and AEC-Q100 qualification - making it uniquely suited for high-reliability, multi-rail, and field-serviceable power architectures.
Availability
LTC4365IDDB#TRPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial PLC power conditioning, and portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC4365IDDB#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 since 1965.
The LTC4365 belongs to Analog Devices' robust power protection controller family, designed specifically for fault-tolerant DC power path management in harsh environments where voltage transients, polarity errors, and long-term reliability are critical.
FAQ
What is the maximum input voltage the LTC4365IDDB#TRPBF can withstand without damage?
The LTC4365IDDB#TRPBF has an absolute maximum input voltage rating of –40V to +60V. This allows it to survive automotive load dump events, battery reversal, and accidental AC line coupling. Its operational range remains 2.5V to 34V, but the wider protection range ensures survivability during fault conditions without requiring external clamping components in most designs.
Does the LTC4365IDDB#TRPBF provide reverse voltage protection, and how does it work?
Yes, the LTC4365IDDB#TRPBF provides active reverse supply protection down to –40V. When VIN goes negative, its internal reverse comparator closes a switch connecting the GATE pin directly to VIN. This forces back-to-back N-channel MOSFETs into a blocking state by holding M2's gate at the negative rail, preventing current flow through the body diode - eliminating the need for external diodes or P-MOSFETs.
Can the undervoltage and overvoltage thresholds of the LTC4365IDDB#TRPBF be adjusted, and what is the accuracy?
Yes, both UV and OV thresholds are fully adjustable using external resistive dividers connected to the UV and OV pins. Each input uses a precision 0.500V ±25mV hysteresis comparator. At –40°C to +85°C, threshold accuracy is ±1.5% of the 0.5V reference, enabling reliable 5V–18V windows with standard 1% resistors and <3mV total offset error.
What is the purpose of the 36ms recovery delay in the LTC4365IDDB#TRPBF, and is it configurable?
The 36ms recovery delay ensures the input voltage remains within the user-defined UV/OV window for a minimum duration before re-enabling the load. This debounces noisy inputs, blocks 50Hz/60Hz AC ripple, and prevents chattering during marginal conditions. It is fixed for the LTC4365IDDB#TRPBF; the pin-compatible LTC4365IDDB-1#TRPBF variant reduces this to 1ms for faster fault recovery.
How does the LTC4365IDDB#TRPBF drive external N-channel MOSFETs, and what gate voltage does it deliver?
The LTC4365IDDB#TRPBF uses an internal charge pump to drive the GATE pin up to 9.8V above VOUT, ensuring full enhancement of logic-level N-channel MOSFETs (e.g., Si9945, Si4214). The gate drive voltage is dynamically optimized based on VIN and VOUT - delivering maximum drive at startup and scaling to maintain safe VGS margins across the full 2.5V–34V operating range.
LTC4365IDDB#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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC4365IDDB#TRPBF FAQ
1.How can I place an order for LTC4365IDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365IDDB#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 LTC4365IDDB#TRPBF reliable?
The price and inventory of LTC4365IDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365IDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4365IDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365IDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365IDDB#TRPBF?
LTC4365IDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365IDDB#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 LTC4365IDDB#TRPBF?
For technical support, including LTC4365IDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365IDDB#TRPBF requirements.
6.How does Aetrix verify that LTC4365IDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365IDDB#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 LTC4365IDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4365IDDB#TRPBF?
All LTC4365IDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365IDDB#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 LTC4365IDDB#TRPBF part is unused and in its original packaging.
Return procedure for LTC4365IDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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