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Analog Devices Inc. LTC4364IS-2#PBF
- Part No.:
- LTC4364IS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC4364IS-2#PBF.pdf
- Description:
- IC SURGE STOPPER W/DIODE SMD
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
LTC4364IS-2#PBF from Analog Devices is a surge stopper with ideal diode controller designed for automotive and industrial power rail protection. It regulates output voltage to 27V during 92V/1ms transients, provides reverse input protection to –40V, delivers 0.1% retry duty cycle in overvoltage faults, and operates across 4V–80V input range - used in automotive load-dump protection circuits.
For engineers reviewing the LTC4364IS-2#PBF datasheet, LTC4364IS-2#PBF pinout, LTC4364IS-2#PBF application, or LTC4364IS-2#PBF equivalent, key selection criteria include adjustable fault timer, AEC-Q100 qualification, SO-16 package compatibility, and automatic restart behavior distinguishing it from latch-off LTC4364-1 variants.
Technical Context
The LTC4364IS-2#PBF integrates dual gate drivers: HGATE controls an external N-channel MOSFET for overvoltage/overcurrent regulation (clamping VOUT at 27V via FB divider), while DGATE drives a second N-MOSFET for ideal diode operation with 30mV forward voltage regulation and fast reverse-current shutdown.
Its fault management uses a single TMR capacitor to set warning (1.25V), turn-off (1.35V), and auto-retry (0.15V × 32 cycles) thresholds; unlike LTC4364-1, it automatically recovers after cool-down when OV pin is below threshold - enabling uninterrupted operation in transient-heavy environments like vehicle electrical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 80V - supports cold-crank (4V) and load-dump (up to 92V with clamp) in automotive systems |
| Output Clamp Voltage | Adjustable via FB divider (e.g., 27V) - maintains stable load supply during transients without external regulators |
| Fault Retry Duty Cycle | 0.1% (LTC4364-2 only) - enables low-duty-cycle recovery after overvoltage, minimizing thermal stress on pass MOSFET |
| Reverse Input Protection | –40V - withstands reverse battery connection without damage or latch-up |
| Shutdown Current | 10μA at 12V - ensures minimal parasitic drain in always-on vehicle subsystems |
| Package & Temp Range | 16-Lead Plastic SO, –40°C to +85°C - AEC-Q100 qualified for under-hood and chassis-mounted applications |
| Overcurrent Threshold | 45–55mV (SENSE–OUT) - dynamically scales to 25mV during output short for enhanced MOSFET SOA protection |
Pinout & Package
Package: 16-Lead Plastic SO (Small Outline), exposed pad not present; RoHS-compliant #PBF finish; footprint compatible with industry-standard SOIC-16 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain of HGATE-controlled MOSFET; triggers ENOUT high-impedance state when VCC − VOUT < 0.7V |
| SENSE (Pin 2) | Current sense input | Monitors voltage drop across external sense resistor; initiates current limiting at 45–55mV (or 18–32mV during short) |
| DGATE (Pin 4) | Ideal diode gate drive output | Drives second N-MOSFET to regulate forward drop at ~30mV; pulls low within 1.5μs on reverse current detection |
| SOURCE (Pin 5) | Common source reference | Return node for both MOSFET sources; defines ideal diode anode and serves as gate-drive reference for DGATE/HGATE |
| HGATE (Pin 6) | Surge stopper gate drive output | Controls primary N-MOSFET; regulates VOUT via voltage/current loops; pulls down with 1mA during fault |
| VCC (Pin 8) | Positive supply input | Accepts 4V–80V; tolerates –40V reverse bias; powers internal circuitry and charge pumps |
| SHDN (Pin 9) | Shutdown control input | Pulling below 0.5V reduces ICC to 10μA; open-circuit defaults to ~4V via internal clamp |
| UV (Pin 10) | Undervoltage comparator input | 1.25V threshold with 25–80mV hysteresis; holds HGATE/DGATE off during brownout |
| OV (Pin 11) | Overvoltage comparator input | 1.25V threshold; disables auto-retry if above threshold during fault recovery |
| GND (Pin 12) | Device ground | Signal and power return; referenced by all analog comparators and amplifiers |
| FLT (Pin 13) | Fault open-drain output | Pulls low at TMR = 1.25V (warning); sinks up to 2mA; withstands 80V |
| ENOUT (Pin 14) | Enable output | High-impedance when VOUT > VCC − 0.7V; latched; resets at VOUT < 2.2V |
| TMR (Pin 15) | Fault timer capacitor node | Charged by current proportional to VCC−VOUT; sets warning (1.25V), turn-off (1.35V), and retry (0.15V × 32) timing |
| FB (Pin 16) | Voltage regulator feedback | 1.25V reference input; sets output clamp voltage via resistive divider from OUT to GND |
Key Features
| Feature | Design Value |
|---|---|
| Auto-restart fault recovery | LTC4364-2 variant performs 32-cycle cool-down (0.15V ↔ 1.35V) before re-enabling HGATE - avoids manual reset in inaccessible installations |
| Integrated ideal diode control | Maintains 30mV forward voltage across external MOSFET (M2), replacing Schottky diodes and eliminating 0.3–0.7V dropout loss |
| Dynamic overcurrent threshold scaling | Reduces sense threshold from 50mV to 25mV when VOUT drops below 1.5V - protects MOSFET during hard shorts |
| AEC-Q100 qualified | Rated for –40°C to +85°C ambient (I-grade); validated for automotive surge, ESD, and lifetime reliability requirements |
| Reverse polarity robustness | Withstands –40V on VCC/SOURCE and –20V on OUT/SENSE - eliminates need for upstream TVS or series diodes in reverse-battery scenarios |
Applications
| Automotive Load-Dump Protection | Industrial Redundant Supply ORing |
|---|---|
Use Scenario: Protecting infotainment ECUs during 12V system load dump events (92V/1ms). IC Role / Device Role / Timing Role: LTC4364IS-2#PBF regulates VOUT at 27V using HGATE-controlled MOSFET while maintaining continuous power delivery. Use Value: Prevents downstream DC/DC converter overvoltage failure and eliminates need for oversized input capacitors or clamping Zeners. | Use Scenario: Combining two independent 24V supplies to feed a single load with seamless failover. IC Role / Device Role / Timing Role: LTC4364IS-2#PBF acts as active ORing controller - DGATE-driven MOSFET blocks reverse current while HGATE manages inrush and fault isolation. Use Value: Achieves <1μs reverse-current blocking vs. >100ns body-diode conduction in passive diode ORing, reducing cross-conduction risk. |
| Hot-Swap Power Entry Module | Avionic Power Conditioning Unit |
Use Scenario: Inserting a powered blade into a live 48V telecom backplane without causing bus disturbance. IC Role / Device Role / Timing Role: LTC4364IS-2#PBF limits inrush current via controlled HGATE ramp and detects overcurrent within 2μs propagation delay. Use Value: Enables zero-downtime maintenance while meeting IEC 61000-4-5 surge immunity requirements up to 200V/1ms. | Use Scenario: Protecting flight control sensors from 28V aircraft bus transients and reverse polarity during ground servicing. IC Role / Device Role / Timing Role: LTC4364IS-2#PBF provides dual-layer protection: HGATE regulates surges; DGATE enforces reverse-input blocking to –40V. Use Value: Meets DO-160 Section 22 Level 3 lightning-induced transient immunity and eliminates separate reverse-protection diodes. |
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 |
|---|---|---|---|
| LTC4364IMS-2#PBF | Same functionality and pinout; MSOP-16 package with θJA = 120°C/W vs SO-16's 100°C/W | Better thermal performance in compact PCB layouts; requires different land pattern and reflow profile | Select for space-constrained designs where thermal resistance must be minimized despite higher assembly cost |
| TPS26631PWPR | Single-channel hot-swap controller with integrated 80V MOSFET; no ideal diode function; fixed 28.5V OVP | Lacks reverse-input protection and output holdup capability; simpler layout but limited to basic overvoltage cutoff | Choose when ideal diode functionality is unnecessary and board area is critical - not a functional replacement for LTC4364IS-2#PBF |
Compared with LTC4364IMS-2#PBF, LTC4364IS-2#PBF offers lower thermal resistance in SO packaging and identical AEC-Q100 qualification, while TPS26631PWPR omits ideal diode control and adjustable clamping - making it suitable only for basic overvoltage cutoff, not full surge+reverse protection.
Availability
LTC4364IS-2#PBF is available at Aetrix Electronics and suitable for automotive load-dump protection, industrial redundant supply ORing, and avionic power conditioning requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC4364IS-2#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, Inc. 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 integrated surge stopper + ideal diode control for high-reliability power path management - specifically engineered for automotive and aerospace applications demanding AEC-Q100 compliance, wide input range, and robust fault handling.
FAQ
What is the key functional difference between LTC4364IS-2#PBF and LTC4364IS-1#PBF?
The LTC4364IS-2#PBF implements automatic restart after fault timeout: once the TMR capacitor completes its 32-cycle cool-down sequence and the OV pin is below threshold, HGATE resumes driving the pass MOSFET. In contrast, LTC4364IS-1#PBF latches HGATE off permanently until SHDN or UV is actively pulsed - making LTC4364IS-2#PBF preferable for unattended or remote systems where manual reset is impractical.
Can LTC4364IS-2#PBF protect against reverse battery connection?
Yes. The LTC4364IS-2#PBF withstands –40V on VCC and SOURCE pins, and –20V on OUT and SENSE pins. When reverse battery is applied, internal circuitry pulls DGATE and HGATE to SOURCE potential, turning off both external N-MOSFETs and blocking reverse current flow - eliminating need for external series diodes or TVS devices in the input path.
How is the output clamp voltage set for LTC4364IS-2#PBF?
The output clamp voltage is set by an external resistive divider from the OUT pin to GND, connected to the FB (Pin 16) input. Since the internal reference is 1.25V, a 27V clamp requires R1/R2 = 21.6:1 (e.g., 4.99kΩ from FB to GND and 102kΩ from OUT to FB). The FB pin draws only ±1µA, ensuring minimal divider current error and stable regulation across temperature.
What is the maximum transient voltage LTC4364IS-2#PBF can survive at VIN?
The LTC4364IS-2#PBF is specified to withstand 200V/1ms transients at VIN per datasheet Typical Application section. This rating assumes proper external clamping (e.g., VCC clamp Zener) and appropriate MOSFET SOA selection. Its absolute maximum VCC rating is 100V, so sustained input above 80V requires external clamping - but brief 200V spikes are handled safely through controlled energy dissipation in the external pass MOSFET.
Does LTC4364IS-2#PBF require external components for basic operation?
Yes. Minimum external components include: (1) HGATE-to-GND capacitor (≥6.8nF), (2) DGATE-to-SOURCE Zener (15V for >24V supplies), (3) FB resistive divider, (4) TMR timing capacitor, (5) external N-MOSFETs for HGATE and DGATE, and (6) sense resistor between SENSE and OUT. No bootstrap capacitors or gate resistors are required due to integrated charge pumps and optimized drive strength.
LTC4364IS-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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:
- 16-SO
LTC4364IS-2#PBF FAQ
1.How can I place an order for LTC4364IS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364IS-2#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 LTC4364IS-2#PBF reliable?
The price and inventory of LTC4364IS-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4364IS-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364IS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364IS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364IS-2#PBF?
LTC4364IS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364IS-2#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 LTC4364IS-2#PBF?
For technical support, including LTC4364IS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364IS-2#PBF requirements.
6.How does Aetrix verify that LTC4364IS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364IS-2#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 LTC4364IS-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364IS-2#PBF?
All LTC4364IS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364IS-2#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 LTC4364IS-2#PBF part is unused and in its original packaging.
Return procedure for LTC4364IS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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