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Analog Devices Inc. LTC4364CDE-1#PBF
- Part No.:
- LTC4364CDE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC4364CDE-1#PBF.pdf
- Description:
- SURGE STOPPER W/DIODE 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:215
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Product details
Overview
LTC4364CDE-1#PBF from Analog Devices is a surge stopper with ideal diode controller for automotive and industrial high-reliability power rails. It protects downstream loads from 200V/1ms transients, regulates output at adjustable clamp voltage (e.g., 27V), provides reverse input protection to –40V, and drives dual N-channel MOSFETs for overvoltage/overcurrent limiting and bidirectional blocking. Used in automotive infotainment power supplies.
For engineers reviewing the LTC4364CDE-1#PBF datasheet, LTC4364CDE-1#PBF pinout, LTC4364CDE-1#PBF application, or LTC4364CDE-1#PBF equivalent, key selection criteria include latch-off fault behavior, 4V–80V operating range, 10μA shutdown current, AEC-Q100 qualification, and DFN-14 package thermal performance.
Technical Context
The LTC4364CDE-1#PBF implements dual-loop protection: a voltage amplifier regulates HGATE to maintain 1.25V at FB during overvoltage, while a current amplifier limits ∆VSNS to 50mV (or 25mV during output short) by controlling the same HGATE. Fault timing is set by external capacitor on TMR, with distinct 1.25V warning and 1.35V turn-off thresholds.
Its ideal diode function uses DGATE to regulate forward voltage across M2 to 30mV, with fast 130mA pull-down to block reverse current when ∆VSD drops below –30mV. UV and OV comparators independently disable HGATE and inhibit retry-LTC4364-1 latches off after fault timeout, requiring SHDN or UV reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; withstands –40V reverse input and 200V/1ms transient without damage |
| Output Clamp Regulation | Adjustable via FB divider; maintains precise 1.25V reference at FB pin during overvoltage |
| Fault Response | LTC4364-1 latches HGATE off after TMR reaches 1.35V; requires active SHDN or UV pin reset |
| Ideal Diode Control | DGATE regulates VSD to 30mV forward drop; pulls low within 1.5μs if reverse voltage exceeds –30mV |
| Shutdown Current | 10μA at 12V (latched over full temperature range), enabling low-power system sleep modes |
| Package & Temp Grade | 14-lead 4mm × 3mm DFN; commercial grade (0°C to 70°C) with exposed pad for thermal relief |
| AEC-Q100 Qualification | Qualified per AEC-Q100 Rev H for automotive applications-supports under-hood and body control modules |
Pinout & Package
Package: 14-lead (4mm × 3mm) plastic DFN with optional exposed pad (Pin 15) connected to GND for improved thermal performance (θJA = 45°C/W).
| 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 |
| SENSE (Pin 2) | Current sense amplifier input | Monitors voltage across external sense resistor; triggers overcurrent protection at 50mV (25mV during output short) |
| DGATE (Pin 3) | Ideal diode gate drive output | Drives second N-MOSFET; regulates forward drop to 30mV and blocks reverse current within 1.5μs |
| SOURCE (Pin 4) | Common source reference | Return path for both MOSFET sources; defines anode of ideal diode and reference for SENSE/OUT differential |
| HGATE (Pin 5) | Surge stopper gate drive output | Controls main pass MOSFET; regulated by voltage/current amplifiers to clamp output or limit current |
| VCC (Pin 6) | Main supply input | Accepts 4V–80V; survives –40V reverse bias; powers internal circuitry and charge pumps |
| SHDN (Pin 7) | Shutdown control input | Pulling below 0.5V reduces ICC to 10μA and latches HGATE/DGATE off; open-circuit defaults to ~4V via internal clamp |
| UV (Pin 8) | Undervoltage comparator input | Threshold = 1.25V; falling edge disables HGATE; for LTC4364-1 only, falling below 0.6V resets latch |
| OV (Pin 9) | Overvoltage comparator input | Threshold = 1.25V; rising edge inhibits auto-retry; must fall below threshold before HGATE can restart (LTC4364-2) |
| GND (Pin 10) | Device ground reference | Primary return for internal circuitry and external bypass capacitors |
| FLT (Pin 11) | Fault open-drain output | Pulls low at TMR = 1.25V (warning); remains low after HGATE turn-off; sinks up to 2mA, rated to 80V |
| ENOUT (Pin 12) | Enable output open-drain | High-impedance when VOUT > VCC − 0.7V; latched; resets when VOUT < 2.2V; used for system power-good signaling |
| TMR (Pin 13) | Fault timer capacitor node | Charged by current proportional to VCC − VOUT; sets warning (1.25V), turn-off (1.35V), and cool-down (0.15V) thresholds |
| FB (Pin 14) | Voltage regulation feedback | Internal 1.25V reference; connects to resistive divider from OUT to GND to set output clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-MOSFET control | Single IC manages both surge stopper (HGATE) and ideal diode (DGATE) functions, eliminating discrete diode and separate controllers |
| Programmable fault timing | TMR capacitor sets precise, voltage-dependent timeout-shorter for higher VCC−VOUT to protect MOSFET SOA during sustained overvoltage |
| Reverse polarity hardening | Withstands –40V at VCC and –20V at OUT; DGATE/HGATE automatically clamp to SOURCE during reverse-battery events |
| Latch-off fault recovery | LTC4364-1's persistent fault state prevents uncontrolled re-engagement-requires explicit SHDN or UV reset for safety-critical systems |
| Low-quiescent operation | 370–750μA operating current and 10μA shutdown current enable use in always-on automotive modules without battery drain |
Applications
| Automotive Load Dump Protection | Industrial Redundant Power ORing |
|---|---|
Use Scenario: Protects infotainment head units from 120V load dump transients in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: LTC4364CDE-1#PBF acts as primary surge stopper-regulates output to 27V using HGATE-controlled MOSFET while maintaining uninterrupted operation. Use Value: Eliminates need for TVS diodes rated >1500W; extends system lifetime by preventing MOSFET thermal runaway during multi-second transients. | Use Scenario: Enables seamless switchover between two independent 24V DC power supplies in PLC backplanes. IC Role / Device Role / Timing Role: LTC4364CDE-1#PBF serves as ideal diode controller (DGATE) for reverse-blocking and as surge limiter (HGATE) for input rail stabilization. Use Value: Reduces forward voltage drop from 0.4V (Schottky) to 30mV, cutting conduction loss by >85% and enabling smaller heatsinks. |
| Hot-Swap Server Backplane | Avionic Power Sequencing |
Use Scenario: Safely inserts 48V line cards into live telecom backplanes without causing bus collapse or arcing. IC Role / Device Role / Timing Role: LTC4364CDE-1#PBF controls inrush via HGATE slew rate and blocks reverse current via DGATE during insertion/removal. Use Value: Limits peak inrush current to <1A using programmable ∆VSNS threshold; prevents brownout of shared 48V bus during hot-swap. | Use Scenario: Powers mission-critical flight control sensors requiring continuous operation during 28V aircraft bus dips and surges. IC Role / Device Role / Timing Role: LTC4364CDE-1#PBF provides hold-up via ideal diode (DGATE) during input shorts and clamps output at 28.5V during 100V transients. Use Value: Meets DO-160 Section 22 Level 3 surge immunity; holds output for >50ms during 100% bus dropout using external bulk capacitance. |
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 |
|---|---|---|---|
| LTC4364CDE-2#PBF | Auto-restart after fault cooldown (32-cycle TMR cycle); no latch; 0.1% retry duty cycle during overvoltage | Suitable for non-safety-critical systems needing automatic recovery without host intervention | Select LTC4364CDE-2#PBF when fault resilience outweighs deterministic shutdown requirements |
| TPS26631PWPR | Single-channel eFuse with integrated MOSFET; fixed 28V OVP; no ideal diode control; 1.5A max current | Lower complexity for basic overcurrent/overvoltage protection where reverse blocking is handled externally | Choose TPS26631PWPR for cost-sensitive 28V systems without hold-up or bidirectional protection needs |
Compared with LTC4364CDE-2#PBF, the LTC4364CDE-1#PBF provides deterministic fault containment critical for safety systems, while TPS26631PWPR trades dual-MOSFET flexibility for lower BOM count and fixed protection thresholds.
Availability
LTC4364CDE-1#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC backplanes, telecom hot-swap modules, and avionic sensor power supplies requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC4364CDE-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 precision instrumentation, industrial automation, and automotive markets.
The LTC4364 product line delivers robust front-end protection for high-availability power systems-designed specifically for automotive load dump, redundant ORing, and hot-swap applications demanding latch-off reliability and bidirectional fault containment.
FAQ
What is the key functional difference between LTC4364CDE-1#PBF and LTC4364CDE-2#PBF?
The LTC4364CDE-1#PBF latches off the HGATE-controlled MOSFET after fault timeout and requires manual reset via SHDN or UV pin. In contrast, the LTC4364CDE-2#PBF automatically restarts after a 32-cycle TMR cooldown period if OV conditions clear. This makes LTC4364CDE-1#PBF preferred for safety-critical automotive ECUs where uncontrolled re-engagement is unacceptable.
How does LTC4364CDE-1#PBF achieve reverse input protection to –40V?
The LTC4364CDE-1#PBF achieves –40V reverse input protection through absolute maximum rating design: its VCC pin tolerates –40V relative to GND without damage, and internal clamps force DGATE and HGATE to track SOURCE during reverse bias-turning off both MOSFETs and blocking conduction. No external components are required beyond standard input filtering.
Can LTC4364CDE-1#PBF regulate output voltage to a value other than 27V?
Yes. The LTC4364CDE-1#PBF regulates output voltage via the FB pin and an external resistive divider from OUT to GND. With the internal 1.25V reference, any clamp voltage ≥4V can be set-for example, 15V using R1=115kΩ and R2=10kΩ. The datasheet Figure 1 shows 27V as a typical automotive example, not a fixed value.
What is the role of the TMR pin in LTC4364CDE-1#PBF fault timing?
The TMR pin in LTC4364CDE-1#PBF sets three critical thresholds via external capacitor: 1.25V triggers FLT warning, 1.35V forces HGATE turn-off (latching), and 0.15V initiates cooldown cycling. Its charging current scales with VCC−VOUT, ensuring shorter timeouts during severe overvoltage-protecting the external MOSFET's safe operating area.
Is LTC4364CDE-1#PBF compatible with 48V industrial systems?
Yes. LTC4364CDE-1#PBF supports 4V–80V operation, making it fully compatible with 48V industrial systems. Its 200V/1ms surge tolerance, –40V reverse input rating, and ability to regulate output at 48V±5% (via FB divider) meet IEC 61000-4-5 Level 4 requirements when paired with appropriately rated MOSFETs and layout practices.
LTC4364CDE-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)
LTC4364CDE-1#PBF FAQ
1.How can I place an order for LTC4364CDE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364CDE-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 LTC4364CDE-1#PBF reliable?
The price and inventory of LTC4364CDE-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 LTC4364CDE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364CDE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364CDE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364CDE-1#PBF?
LTC4364CDE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364CDE-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 LTC4364CDE-1#PBF?
For technical support, including LTC4364CDE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364CDE-1#PBF requirements.
6.How does Aetrix verify that LTC4364CDE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364CDE-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 LTC4364CDE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364CDE-1#PBF?
All LTC4364CDE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364CDE-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 LTC4364CDE-1#PBF part is unused and in its original packaging.
Return procedure for LTC4364CDE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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