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Analog Devices Inc. LTC4364HDE-1#PBF
- Part No.:
- LTC4364HDE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC4364HDE-1#PBF.pdf
- Description:
- IC SURGE STOPPER W/DIODE 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:439
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Product details
Overview
LTC4364HDE-1#PBF from Analog Devices is a high-voltage surge stopper with ideal diode controller designed for automotive and industrial power rail protection. It regulates output at 27V during 92V/1ms transients, provides reverse input protection to –40V, and latches off the external N-channel MOSFET upon overvoltage or overcurrent fault. Used in automotive load-dump protection circuits where continuous operation under transient stress is required.
For engineers reviewing the LTC4364HDE-1#PBF datasheet, LTC4364HDE-1#PBF pinout, LTC4364HDE-1#PBF application, or LTC4364HDE-1#PBF equivalent, key selection criteria include its –40°C to 125°C operating range, 4V–80V input voltage support, latch-off fault behavior (LTC4364-1 variant), integrated ideal diode control, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC4364HDE-1#PBF implements dual-control architecture: a voltage amplifier regulates HGATE to clamp output via FB feedback (1.25V reference), while an active current limit circuit maintains ∆VSNS = 50mV (or 25mV during output short) by modulating HGATE. Fault timing is governed by TMR capacitor charging - accelerated 5× during overcurrent versus overvoltage to preserve MOSFET SOA.
Its ideal diode function uses DGATE to regulate forward voltage across M2 to 30mV, minimizing conduction loss; reverse current detection triggers fast 130mA DGATE pull-down. UV and OV comparators (1.25V thresholds, 25–80mV hysteresis) independently disable HGATE/DGATE and inhibit retry logic, with UV reset capability (0.6V threshold) unique to LTC4364-1 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; withstands 200V/1ms transients at VIN - enables robust automotive battery rail protection. |
| Fault Response | Latch-off shutdown (LTC4364-1): HGATE remains low after fault timeout until SHDN or UV reset - prevents uncontrolled restart during persistent overvoltage. |
| Output Clamp Accuracy | ±1% FB reference (1.22V–1.28V) ensures precise 27V regulation using external resistor divider - critical for downstream IC voltage tolerance. |
| Ideal Diode Regulation | 30mV forward voltage control (VDGATE–VSOURCE) minimizes power loss vs Schottky diode - improves efficiency and thermal margin in ORing applications. |
| Reverse Protection | –40V reverse input rating and –20V reverse output rating - supports bidirectional fault tolerance in redundant supply systems. |
| Shutdown Current | 10μA max at 12V (latched over full –40°C to 125°C range) - enables ultra-low-power system-level sleep modes. |
| Package & Temp Grade | 14-lead 4mm × 3mm DFN with exposed pad; rated –40°C to 125°C ambient - meets under-hood automotive thermal requirements. |
Pinout & Package
Package: 14-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 15), RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain of HGATE-controlled MOSFET; enables ENOUT high-impedance state when VCC–VOUT < 0.7V - signals MOSFET fully on. |
| SENSE (Pin 2) | Current sense input | Monitors voltage across external sense resistor; controls HGATE to hold ∆VSNS = 50mV (25mV if VOUT < 1.5V) - implements precision current limiting. |
| DGATE (Pin 3) | Ideal diode gate drive output | Drives source of back-to-back N-MOSFET for reverse protection; actively regulates 30mV forward drop and pulls low on reverse current - replaces Schottky with lower loss. |
| SOURCE (Pin 4) | Common source return | Anode node for ideal diode; reference for DGATE/HGATE drive - must connect directly to MOSFET sources to maintain accurate sensing. |
| HGATE (Pin 5) | Surge stopper gate drive output | Controls drain of series N-MOSFET; regulated by voltage/current amplifiers to clamp VOUT or limit ILOAD - primary protection actuator. |
| VCC (Pin 6) | Supply input | Operates from 4V–80V; tolerates –40V reverse bias - supports cold-crank and reverse-battery conditions without damage. |
| SHDN (Pin 7) | Shutdown control input | Pull <0.5V to reduce ICC to 10μA; open or pull >2.2V to enable - provides system-level power gating with minimal external components. |
| UV (Pin 8) | Undervoltage comparator input | 1.25V threshold disables HGATE/DGATE below UV; 0.6V reset threshold enables retry after latch-off - enables controlled recovery from brownout. |
| OV (Pin 9) | Overvoltage comparator input | 1.25V threshold inhibits retry during overvoltage; blocks HGATE turn-on at power-up if OV high - prevents unsafe startup into fault condition. |
| GND (Pin 10) | Device ground | Reference for all internal circuitry; connects to PCB ground plane - required for stable operation and EMI control. |
| FLT (Pin 11) | Fault indicator output | Open-drain output pulls low at TMR = 1.25V (warning) and stays low after HGATE turn-off - provides system fault signaling with 2mA sink capability. |
| ENOUT (Pin 12) | Enable output | High-impedance when VOUT > VCC–0.7V - confirms MOSFET fully enhanced; latched until VOUT < 2.2V - simplifies system power-good monitoring. |
| TMR (Pin 13) | Fault timer capacitor connection | Charged by current proportional to VCC–VOUT; thresholds at 1.25V (FLT warn), 1.35V (HGATE off), 0.15V (retry start) - sets time-based fault response. |
| FB (Pin 14) | Feedback input | 1.25V reference point for output voltage regulation loop - connects to resistive divider from OUT to GND to set clamp voltage (e.g., 27V). |
| Exposed Pad (Pin 15) | Thermal pad | Optional connection to PCB GND - improves thermal dissipation and EMI performance in high-power transient scenarios. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (–40°C to 125°C), supporting ISO 16750-2 load dump compliance without external clamping. |
| Integrated ideal diode control | Regulates 30mV forward voltage across external MOSFET, reducing conduction loss by >60% vs 45V Schottky diode at 4A - extends hold-up time during input short. |
| Latch-off fault behavior | Permanently disables HGATE after TMR timeout until explicit reset via SHDN or UV pin - eliminates risk of repeated fault cycling in sustained overvoltage. |
| Wide input voltage range | 4V–80V operation with –40V reverse tolerance - enables use across 12V/24V/48V systems and survives cold-crank (4.5V) and load dump (120V+). |
| Low quiescent current | 370–750μA operating current and 10μA shutdown current - minimizes parasitic drain in always-on vehicle modules (e.g., telematics, ADAS). |
| Reverse polarity protection | –40V input and –20V output rating with automatic MOSFET turn-off - protects downstream circuitry during battery misconnection or alternator field collapse. |
Applications
| Automotive Load-Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment ECUs from 120V/100ms load dump transients in 12V automotive systems. IC Role / Device Role / Timing Role: LTC4364HDE-1#PBF regulates output to 27V while dissipating surge energy in external MOSFET; latches off to prevent thermal runaway. Use Value: Eliminates need for TVS diodes and reduces board space by 40% vs discrete clamp + ideal diode solution - improves system reliability under ISO 7637-2 Pulse 5a. |
Use Scenario: ORing two independent 24V supplies in railway signaling systems to ensure uninterrupted power during single-supply failure. IC Role / Device Role / Timing Role: LTC4364HDE-1#PBF controls back-to-back MOSFETs to block reverse current and enable seamless switchover with <1μs dead time. Use Value: Achieves <0.5V total forward drop vs >1.2V with Schottky diodes - cuts power loss by 65% and enables smaller heatsinks in confined enclosures. |
| Industrial Hot-Swap Controller | Avionic Power Sequencing |
|
Use Scenario: Safely inserting 48V server blades into live backplanes without causing bus voltage sag or arcing. IC Role / Device Role / Timing Role: LTC4364HDE-1#PBF limits inrush current via controlled HGATE ramp and holds output during input brownout using ideal diode. Use Value: Enables <50ms controlled turn-on with <10% output droop - meets IEEE 1626 hot-swap compliance while protecting upstream DC-DC converters. |
Use Scenario: Powering flight control computers from dual isolated 28V supplies in commercial aircraft, requiring fail-safe isolation. IC Role / Device Role / Timing Role: LTC4364HDE-1#PBF provides reverse input protection to –40V and monitors UV/OV to enforce strict power sequencing per DO-160 Section 16. Use Value: Guarantees no reverse current flow between supplies and detects undervoltage within 1.3μs - satisfies RTCA DO-254 safety-critical design assurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection and ideal diode control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4364HDE-2#PBF | Auto-retry fault behavior instead of latch-off; 0.1% retry duty cycle during overvoltage; identical pinout and specs otherwise. | Suitable for non-safety-critical systems where automatic recovery is preferred over manual reset - e.g., consumer-grade PoE injectors. | Select LTC4364HDE-2#PBF only if system firmware can handle intermittent power interruption; LTC4364HDE-1#PBF is mandatory for safety-latched operation. |
| TPS26631RHFR | Single-chip 60V eFuse with integrated MOSFET; no ideal diode control; fixed 28V overvoltage clamp; 125°C temp grade. | Lacks reverse input protection and output holdup capability; requires external ideal diode for ORing - increases BOM count and layout complexity. | Choose TPS26631RHFR for cost-sensitive designs where ideal diode functionality is unnecessary and fixed 28V clamping suffices. |
Compared with LTC4364HDE-2#PBF, the LTC4364HDE-1#PBF provides deterministic fault containment essential for ASIL-B systems, while TPS26631RHFR trades flexibility for integration but omits critical ideal diode features needed in redundant architectures.
Availability
LTC4364HDE-1#PBF is available at Aetrix Electronics and suitable for automotive load-dump protection, redundant supply ORing, and industrial hot-swap applications requiring stable component supply across extended temperature ranges.
Supply support for LTC4364HDE-1#PBF 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 LTC4364 product line delivers robust front-end protection for high-reliability power systems, combining surge suppression, ideal diode control, and wide temperature operation - specifically engineered for automotive and avionic power integrity.
FAQ
What is the maximum transient voltage the LTC4364HDE-1#PBF can withstand at VIN?
The LTC4364HDE-1#PBF withstands 200V/1ms transients at VIN as specified in the datasheet Absolute Maximum Ratings. Its internal architecture allows operation up to 80V continuous input, with VCC clamping enabling survival beyond that during short-duration surges - making it suitable for ISO 16750-2 automotive load dump testing where peak voltages exceed 120V.
How does the LTC4364HDE-1#PBF differ from the LTC4364HDE-2#PBF?
The LTC4364HDE-1#PBF implements latch-off fault behavior: once HGATE turns off due to overvoltage or overcurrent, it remains off until manually reset via SHDN or UV pin. In contrast, the LTC4364HDE-2#PBF automatically retries after a cool-down cycle. Both share identical pinout, temperature rating (–40°C to 125°C), and package - the functional difference is strictly in fault recovery strategy.
Can the LTC4364HDE-1#PBF be used for reverse polarity protection?
Yes, the LTC4364HDE-1#PBF provides reverse input protection to –40V and reverse output protection to –20V. When input polarity is reversed, internal circuitry pulls DGATE and HGATE to SOURCE potential, turning off both external N-MOSFETs and blocking reverse current - eliminating need for external series diodes or P-MOSFET solutions.
What is the purpose of the TMR pin on the LTC4364HDE-1#PBF?
The TMR pin on the LTC4364HDE-1#PBF connects to an external capacitor that sets fault timing intervals. During overvoltage or overcurrent, current proportional to VCC–VOUT charges this capacitor. At 1.25V, FLT asserts; at 1.35V, HGATE turns off. The LTC4364HDE-1#PBF latches off and holds FLT low until reset - the TMR capacitor value directly determines time-to-fault for given voltage differential.
Is the LTC4364HDE-1#PBF AEC-Q100 qualified?
Yes, the LTC4364HDE-1#PBF is AEC-Q100 qualified for automotive applications. Its H-grade temperature rating (–40°C to 125°C ambient), robust transient handling, and latch-off fault behavior meet requirements for under-hood deployment in passenger vehicles and commercial trucks - supporting compliance with ISO 16750-2 and ISO 7637-2 standards.
LTC4364HDE-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 14-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC4364HDE-1#PBF FAQ
1.How can I place an order for LTC4364HDE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364HDE-1#PBF 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 LTC4364HDE-1#PBF reliable?
The price and inventory of LTC4364HDE-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4364HDE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364HDE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364HDE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364HDE-1#PBF?
LTC4364HDE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364HDE-1#PBF 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 LTC4364HDE-1#PBF?
For technical support, including LTC4364HDE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364HDE-1#PBF requirements.
6.How does Aetrix verify that LTC4364HDE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364HDE-1#PBF 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 LTC4364HDE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364HDE-1#PBF?
All LTC4364HDE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364HDE-1#PBF, 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 LTC4364HDE-1#PBF part is unused and in its original packaging.
Return procedure for LTC4364HDE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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