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Analog Devices Inc. LTC4365IDDB#TRMPBF
- Part No.:
- LTC4365IDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4365IDDB#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROTECT 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,681
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Product details
Overview
LTC4365IDDB#TRMPBF 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 125µA operating current, and features 36ms recovery delay-designed for automotive surge protection in 12V battery-fed ECUs.
For engineers reviewing the LTC4365IDDB#TRMPBF datasheet, LTC4365IDDB#TRMPBF pinout, LTC4365IDDB#TRMPBF application, or LTC4365IDDB#TRMPBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature grade, DFN-8 (3mm × 2mm) package, adjustable UV/OV thresholds via resistive dividers, and compatibility with back-to-back N-MOSFET configurations for bidirectional fault blocking.
Technical Context
The LTC4365IDDB#TRMPBF implements dual precision comparators (0.5V threshold ±25mV hysteresis) on UV and OV pins to detect input excursions outside user-defined windows. Its internal charge pump generates gate drive referenced to VOUT, delivering up to 9.8V enhancement above VOUT for reliable N-MOSFET turn-on across the full 2.5V–34V operating range.
Fault response includes a 50mA fast GATE pull-down for immediate MOSFET turn-off during UV/OV events, plus gentle shutdown via 90µA GATE sink that forces GATE to track VOUT decay-minimizing load-current slew rate and suppressing inductive voltage spikes. Recovery requires sustained valid input for 36ms to prevent chatter from line noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - supports wide-input industrial and automotive power rails without external regulators. |
| Protection Range | –40V to +60V - withstands reverse battery connection, load dump transients, and AC line coupling without damage. |
| UV/OV Threshold Accuracy | ±1.5% at 0.5V reference - enables precise 5V–18V window setting with standard 1% resistors and <1nA leakage. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of low-threshold N-MOSFETs even at low VIN (e.g., 2.5V). |
| Quiescent Current | 125µA typical - enables always-on protection in battery-backed systems without significant drain. |
| Recovery Delay | 36ms - debounces 50/60Hz AC ripple and prevents chattering during noisy supply transitions. |
| Temperature Range | –40°C to +85°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN with exposed pad (pin 9), RoHS-compliant, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return for internal circuitry and exposed pad connection point. |
| OV | Overvoltage Comparator Input | Connects to resistive divider; triggers GATE turn-off when VIN exceeds user-set threshold (0.5V internal reference). |
| UV | Undervoltage Comparator Input | Connects to resistive divider; triggers GATE turn-off when VIN falls below user-set threshold (0.5V internal reference). |
| VIN | Input Supply Terminal | Accepts protected input from –40V to +60V; powers internal circuitry within 2.5V–34V operating range. |
| SHDN | Shutdown Control Input | Active-high enable; pulls GATE low and reduces supply current to 10µA when low. |
| FAULT | Open-Drain Fault Indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN < UVLO (1.8V–2.4V); sinks ≥500µA. |
| VOUT | Output Sense Reference | Senses output-side voltage; serves as reference for GATE charge pump and reverse-protection logic. |
| GATE | N-MOSFET Gate Driver Output | Drives external back-to-back N-MOSFET gates; tracks VOUT during shutdown and provides up to 9.8V enhancement. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse Supply Protection | Automatically connects GATE to negative VIN to disable back-to-back N-MOSFETs-no external diodes or P-MOSFETs required. |
| Adjustable UV/OV Windows | Configurable via two independent resistive dividers; low 10nA pin leakage allows high-value resistors for minimal power loss. |
| Gentle Shutdown | 90µA GATE sink forces GATE to track VOUT decay, limiting dI/dt and preventing inductive kickback at the load. |
| No External TVS or Capacitor Required | Integrated 60V tolerance and 36ms recovery timer eliminate need for input clamping or bulk capacitance in most 12V automotive applications. |
| AEC-Q100 Qualified | Qualified per AEC-Q100 Grade 3 (–40°C to +85°C) for automotive ECU, infotainment, and ADAS power management. |
Applications
| Automotive Battery Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: 12V lead-acid battery input to engine control unit (ECU) subjected to load dump (up to +60V) and reverse jump-start (–40V). IC Role / Device Role / Timing Role: Primary input fault controller that isolates downstream circuitry by turning off external N-MOSFETs within 1µs of fault detection. Use Value: Eliminates need for discrete TVS diodes and series Schottky diodes-reducing BOM count and forward voltage drop while maintaining AEC-Q100 compliance. | Use Scenario: 24V DC industrial PLC I/O module powered from unregulated factory supply with line transients and brownouts. IC Role / Device Role / Timing Role: Overvoltage/undervoltage supervisor enforcing 18V–30V safe window before enabling downstream DC-DC converters. Use Value: Prevents latch-up or reset instability in microcontrollers during supply sags or surges-enabling robust operation without system-level watchdog intervention. |
| Portable Instrumentation Power Management | Laptop Docking Station Surge Suppression |
Use Scenario: Dual-input (AC adapter + Li-ion battery) portable test equipment requiring polarity-agnostic power connection. IC Role / Device Role / Timing Role: Reverse-voltage blocker and voltage-window enforcer ensuring only valid 5V–20V inputs reach the main power rail. Use Value: Enables hot-swap capability with no risk of damage from misconnected adapters-verified down to –40V with sub-1µs fault propagation. | Use Scenario: USB-C docking station with multiple upstream power sources (host laptop, wall adapter) feeding shared 12V/20V bus. IC Role / Device Role / Timing Role: Input protector for each source path, using SHDN to coordinate source selection and prevent backfeeding. Use Value: Allows seamless source handover without voltage glitches or cross-conduction-leveraging gentle shutdown to maintain stable VOUT during transitions. |
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 | Integrated 60V N-MOSFET; fixed 3.5V UVLO and 36V OV; no adjustable thresholds or reverse protection. | Best for space-constrained designs needing single-chip solution without external FETs-but lacks reverse blocking and programmability. | Select TPS26631RGER if board area is critical and fixed thresholds suffice; avoid if reverse polarity or custom UV/OV windows are required. |
| MAX14523ATA+T | Fixed 5.5V OV and 2.7V UV thresholds; supports only positive input; no reverse protection; 1.2A integrated switch. | Targeted at USB-powered peripherals-not suitable for automotive or industrial negative-rail environments. | Choose MAX14523ATA+T for low-cost consumer USB devices; reject for any application requiring –40V tolerance or adjustable windows. |
Compared with TPS26631RGER and MAX14523ATA+T, the LTC4365IDDB#TRMPBF uniquely combines adjustable UV/OV thresholds, true reverse supply blocking, and external N-MOSFET flexibility-making it the only option among the three qualified for AEC-Q100 automotive use with full –40V to +60V fault coverage.
Availability
LTC4365IDDB#TRMPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial power input conditioning, and portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC4365IDDB#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 industrial, automotive, communications, and healthcare markets.
The LTC4365IDDB#TRMPBF belongs to Analog Devices' LTC® fault protection controller family, engineered specifically for robust, low-loss input power supervision in harsh environments where overvoltage, undervoltage, and reverse polarity events must be blocked without compromising efficiency.
FAQ
What is the maximum input voltage the LTC4365IDDB#TRMPBF can withstand without damage?
The LTC4365IDDB#TRMPBF has an absolute maximum input voltage rating of –40V to +60V. This allows it to survive automotive load dump transients and reverse battery connections without external clamping components. Its operating range remains 2.5V to 34V, but the device's rugged input structure sustains these extreme fault conditions while protecting downstream circuitry. The LTC4365IDDB#TRMPBF achieves this through internal high-voltage design and integrated reverse-monitoring circuitry.
Does the LTC4365IDDB#TRMPBF require external MOSFETs, and why?
Yes, the LTC4365IDDB#TRMPBF requires external back-to-back N-channel MOSFETs to implement bidirectional blocking-essential for reverse voltage protection and low forward-drop operation. Unlike integrated switches, this architecture allows designers to select MOSFETs optimized for specific current, RDS(on), and voltage ratings (e.g., Si9945 for 60V systems). The LTC4365IDDB#TRMPBF drives their gates with up to 9.8V enhancement referenced to VOUT, ensuring full turn-on even at low input voltages.
How does the LTC4365IDDB#TRMPBF handle reverse supply conditions?
The LTC4365IDDB#TRMPBF detects negative VIN via an internal high-speed comparator and automatically connects the GATE pin to VIN, forcing both external N-MOSFETs into cutoff. This blocks current flow while avoiding body-diode conduction in the second MOSFET. The result is true reverse polarity isolation down to –40V without external diodes or P-MOSFETs. The LTC4365IDDB#TRMPBF's topology ensures no power loss or heat generation during reverse events.
Can the UV and OV thresholds of the LTC4365IDDB#TRMPBF be adjusted independently?
Yes, the LTC4365IDDB#TRMPBF provides fully independent UV and OV inputs (pins UV and OV), each accepting a resistive divider to set distinct thresholds. Both comparators use a precise 0.5V internal reference with 25mV hysteresis, enabling accurate windows such as 5V–18V for 12V automotive systems. Leakage currents below 10nA allow use of high-value resistors (e.g., 2.74MΩ, 215kΩ, 84.5kΩ) without accuracy degradation-the LTC4365IDDB#TRMPBF supports this configurability across its full temperature range.
What is the purpose of the 36ms recovery delay in the LTC4365IDDB#TRMPBF?
The 36ms recovery delay prevents output chatter during noisy or marginally stable input conditions-such as 50Hz/60Hz AC ripple or slow-rising battery voltage after cranking. After a UV or OV fault clears, the LTC4365IDDB#TRMPBF requires the input to remain within the programmed window for 36ms before re-enabling the external MOSFETs. This ensures stable power delivery and eliminates repeated on/off cycling. The LTC4365IDDB#TRMPBF implements this timing internally with no external components required.
LTC4365IDDB#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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC4365IDDB#TRMPBF FAQ
1.How can I place an order for LTC4365IDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365IDDB#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 LTC4365IDDB#TRMPBF reliable?
The price and inventory of LTC4365IDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365IDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365IDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365IDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365IDDB#TRMPBF?
LTC4365IDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365IDDB#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 LTC4365IDDB#TRMPBF?
For technical support, including LTC4365IDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365IDDB#TRMPBF requirements.
6.How does Aetrix verify that LTC4365IDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365IDDB#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 LTC4365IDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365IDDB#TRMPBF?
All LTC4365IDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365IDDB#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 LTC4365IDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365IDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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