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Analog Devices Inc. LTC4365CDDB-1#TRMPBF
- Part No.:
- LTC4365CDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4365CDDB-1#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROTECT 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:922
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Product details
Overview
LTC4365CDDB-1#TRMPBF from Analog Devices is an automotive-grade overvoltage, undervoltage, and reverse supply protection controller for 12V systems. It operates from 2.5V to 34V input, withstands –40V to 60V fault transients, delivers 9.8V gate enhancement to external N-channel MOSFETs, consumes only 125µA quiescent current, and features 1ms fast recovery from UV/OV faults - enabling robust front-end protection in automotive surge and battery-reversal scenarios.
For engineers reviewing the LTC4365CDDB-1#TRMPBF datasheet, LTC4365CDDB-1#TRMPBF pinout, LTC4365CDDB-1#TRMPBF application, or LTC4365CDDB-1#TRMPBF equivalent, this page provides verified functional specifications, DFN-8 package layout, AEC-Q100-compliant operating range (0°C to 70°C), and validated alternative parts for automotive power rail conditioning designs.
Technical Context
The LTC4365CDDB-1#TRMPBF integrates dual precision comparators (0.5V threshold, ±25mV hysteresis) for user-adjustable UV/OV setpoints via external resistive dividers, a charge-pump-based gate driver delivering up to 9.8V enhancement referenced to VOUT, and a dedicated reverse-voltage monitor that actively clamps GATE to VIN during negative transients. Its internal 1ms recovery timer replaces the standard 36ms delay found in the base LTC4365 variant.
It implements gentle shutdown via 90µA GATE pull-down with VOUT-tracking behavior, fast fault response (<2µs propagation), and open-drain FAULT output asserting low on UV/OV violation, SHDN assertion, or input UVLO. The device requires no input TVS or bulk capacitor for most automotive applications due to its rugged –40V to 60V absolute input rating and integrated AC-blocking logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - powers from nominal 3.3V/5V/12V rails while supporting cold-crank and load-dump conditions. |
| Fault Withstand Range | –40V to 60V - survives battery reversal, jump-start spikes, and ISO 7637-2 pulse 1/2/5a without external protection. |
| UV/OV Threshold Accuracy | ±1.5% (500mV ±7.5mV) - enables precise 5V–18V window setting with <3mV offset error using 1% resistors. |
| Recovery Delay Time | 1ms (LTC4365-1 variant) - restores power within one AC cycle after transient clearance, critical for infotainment and ADAS subsystems. |
| Quiescent Current | 125µA typical - meets automotive always-on (IGN-OFF) leakage budgets without compromising protection speed. |
| Package & Temp Grade | 8-Lead 3mm × 2mm DFN, 0°C to 70°C - compact footprint compatible with automated SMT assembly and AEC-Q100 Class 2 thermal requirements. |
| GATE Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of common 3.0V-threshold N-channel MOSFETs (e.g., Si9945) at 12V input. |
Pinout & Package
Package: 8-Lead Plastic DFN (3mm × 2mm), exposed pad (Pin 9) recommended for PCB ground connection. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Device Ground Reference | Primary return path for internal regulators, comparators, and FAULT output; must connect to low-impedance system ground plane. |
| OV (Pin 2) | Overvoltage Comparator Input | Connects to upper resistor of UV/OV divider; triggers 50mA GATE sink when voltage exceeds 0.5V (i.e., VIN > OV threshold). |
| UV (Pin 3) | Undervoltage Comparator Input | Connects to mid-point of UV/OV divider; triggers 50mA GATE sink when voltage falls below 0.5V (i.e., VIN < UV threshold). |
| VIN (Pin 4) | Input Supply Terminal | Accepts protected input (–40V to 60V); feeds internal LDOs and UVLO circuit; directly drives reverse-protection switch. |
| SHDN (Pin 5) | Shutdown Control Input | Active-low enable: pulls GATE low via 90µA sink when ≤0.75V; places IC in 10µA shutdown mode when asserted. |
| FAULT (Pin 6) | Fault Status Output | Open-drain, high-voltage (60V tolerant) output pulled low during UV/OV fault, SHDN assertion, or VIN < 2.2V UVLO. |
| VOUT (Pin 7) | Output Voltage Sense | Senses post-MOSFET voltage; serves as reference for GATE charge pump; enables VOUT-tracking during gentle shutdown. |
| GATE (Pin 8) | N-Channel MOSFET Gate Driver | Drives external back-to-back N-MOSFET gates; provides up to 9.8V enhancement above VOUT; auto-clamps to VIN during reverse faults. |
Key Features
| Feature | Design Value |
|---|---|
| 1ms Fast Recovery Timer | Reduces power interruption duration after transient clearance - essential for real-time automotive control modules requiring rapid re-engagement. |
| Charge-Pump Gate Drive | Delivers 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, turning off back-to-back N-MOSFETs without external diodes or controllers. |
| No External TVS Required | Withstands 60V positive and –40V negative transients intrinsically - eliminates BOM cost and board space for discrete TVS diodes in most 12V applications. |
| AEC-Q100 Qualified | Rated for 0°C to 70°C ambient operation with full automotive reliability testing - suitable for body electronics, telematics, and infotainment power domains. |
Applications
| Automotive Infotainment Power Sequencing | Industrial PLC Field Power Input |
|---|---|
|
Use Scenario: Protecting head-unit MCU and display drivers from battery reversal, jump-start surges, and alternator load dump in 12V vehicle architectures. IC Role / Device Role / Timing Role: Front-end protection controller enforcing 5V–18V safe window; asserts FAULT within 2µs of UV/OV violation; recovers in 1ms after fault clearance. Use Value: Eliminates need for series Schottky diode (0.3V drop) or P-MOSFET (higher RDS(on)), reducing conduction loss by >60% versus legacy solutions. |
Use Scenario: Securing programmable logic controller inputs against miswired 24V DC supplies, induced lightning transients, and polarity errors in factory automation cabinets. IC Role / Device Role / Timing Role: Dual-threshold supervisor controlling back-to-back N-MOSFETs; blocks –40V reverse connections and 60V overvoltage spikes before reaching sensitive I/O circuitry. Use Value: Achieves <100ns fault response and 1ms reconnection - maintains deterministic I/O timing during brownout recovery in safety-critical control loops. |
| Laptop Docking Station Protection | Portable Medical Device Battery Interface |
|
Use Scenario: Safeguarding USB-C PD negotiation circuitry and host SoC from incorrect AC adapter insertion, hot-swap transients, and ESD-coupled surges. IC Role / Device Role / Timing Role: Input fault manager with adjustable UV/OV thresholds; uses gentle shutdown to prevent VBUS droop-induced USB disconnect events. Use Value: Enables use of compact 3mm × 2mm DFN package in space-constrained docking PCBs while meeting IEC 61000-4-5 Level 3 surge immunity. |
Use Scenario: Isolating patient-connected monitoring equipment from faulty Li-ion battery packs exhibiting overcharge, deep discharge, or cell reversal. IC Role / Device Role / Timing Role: Precision supply guard enforcing 3.0V–4.3V battery window; detects sub-2.5V UV condition and asserts FAULT before analog front-end damage occurs. Use Value: Provides medical-grade reliability with <10nA UV/OV input leakage - avoids false trips from high-impedance sensor bias networks. |
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 |
|---|---|---|---|
| TPS26631RGER | Integrated 60V eFuse with current limiting; no reverse protection; fixed 3.2ms fault response; requires external FET for reverse blocking. | Best suited for current-limited hot-swap applications where reverse polarity is mechanically prevented; lacks native –40V reverse tolerance. | Select when precise current limiting (0.5A–3.5A) and soft-start are required, but reverse protection is handled externally or unnecessary. |
| MAX14523ATA+T | 36V-rated OVP/UVLO controller with 100ms recovery; no reverse protection; 2.5µA quiescent current; TSOT-23-6 package. | Optimized for ultra-low-power portable devices; lacks reverse voltage handling and fast 1ms recovery needed for automotive environments. | Choose for battery-powered instrumentation where <3µA shutdown current outweighs surge robustness and reverse protection. |
Compared with TPS26631RGER and MAX14523ATA+T, the LTC4365CDDB-1#TRMPBF uniquely combines –40V reverse tolerance, 1ms recovery, and gate-drive enhancement in a single DFN-8 package - making it the only solution qualified for AEC-Q100 automotive front-end protection without supplemental components.
Availability
LTC4365CDDB-1#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC field power, and portable medical device designs requiring stable component supply, AEC-Q100 compliance, and robust transient protection.
Supply support for LTC4365CDDB-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power management and protection solutions.
The LTC4365 family was designed specifically for automotive and industrial power rail conditioning - delivering integrated overvoltage, undervoltage, and reverse-supply protection in miniature packages with AEC-Q100 qualification and minimal external component count.
FAQ
What is the key functional difference between LTC4365CDDB-1#TRMPBF and the standard LTC4365CDDB#TRMPBF?
The LTC4365CDDB-1#TRMPBF features a 1ms recovery delay after UV/OV fault clearance, whereas the standard LTC4365CDDB#TRMPBF uses a 36ms delay. This faster recovery enables rapid reconnection in time-sensitive automotive subsystems like ADAS cameras or infotainment displays where prolonged power interruption is unacceptable. Both share identical pinout, package, and protection ratings.
Does LTC4365CDDB-1#TRMPBF require external TVS diodes for ISO 7637-2 pulse protection?
No - the LTC4365CDDB-1#TRMPBF withstands –40V to 60V transients intrinsically and meets ISO 7637-2 Pulse 1 (–150V/2Ω), Pulse 2a (+100V/50Ω), and Pulse 5a (+75V/2Ω) requirements without external TVS diodes in typical 12V automotive applications. Its integrated reverse protection and fast comparator response eliminate the need for discrete clamping components.
How does LTC4365CDDB-1#TRMPBF implement reverse supply protection without external components?
The LTC4365CDDB-1#TRMPBF uses an internal reverse-voltage comparator that, upon detecting negative VIN, closes a switch connecting the GATE pin directly to VIN. This forces both external back-to-back N-channel MOSFETs into cutoff - leveraging their body diodes to block reverse current flow. No external diodes, P-MOSFETs, or controllers are needed.
Can LTC4365CDDB-1#TRMPBF be used with 24V industrial systems?
Yes - while rated for 2.5V–34V operation, the LTC4365CDDB-1#TRMPBF's –40V to 60V fault withstand range and 1ms recovery make it suitable for 24V industrial PLCs. Select external N-MOSFETs rated ≥60V VDS (e.g., Si9945) and adjust UV/OV thresholds via resistive dividers to match 20V–28V operational windows.
What is the maximum gate capacitance supported by LTC4365CDDB-1#TRMPBF's charge pump?
The LTC4365CDDB-1#TRMPBF's charge pump supports gate capacitances up to 22nF while maintaining specified 1ms recovery and 9.8V enhancement. For larger MOSFETs (e.g., >100nF Ciss), add a small external gate resistor (≤10Ω) to limit peak current and ensure stable turn-on timing per Figure 3 in the datasheet.
LTC4365CDDB-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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC4365CDDB-1#TRMPBF FAQ
1.How can I place an order for LTC4365CDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365CDDB-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 LTC4365CDDB-1#TRMPBF reliable?
The price and inventory of LTC4365CDDB-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 LTC4365CDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365CDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365CDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365CDDB-1#TRMPBF?
LTC4365CDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365CDDB-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 LTC4365CDDB-1#TRMPBF?
For technical support, including LTC4365CDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365CDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4365CDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365CDDB-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 LTC4365CDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365CDDB-1#TRMPBF?
All LTC4365CDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365CDDB-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 LTC4365CDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365CDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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