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Analog Devices Inc. LTC4364CMS-2#PBF
- Part No.:
- LTC4364CMS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4364CMS-2#PBF.pdf
- Description:
- SURGE STOPPER W/DIODE 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:267
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Product details
Overview
LTC4364CMS-2#PBF from Analog Devices is a surge stopper with integrated 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 delivers 0.1% retry duty cycle during overvoltage faults. Used in automotive infotainment power supplies where load dump immunity and output holdup are critical.
For engineers reviewing the LTC4364CMS-2#PBF datasheet, LTC4364CMS-2#PBF pinout, LTC4364CMS-2#PBF application, or LTC4364CMS-2#PBF equivalent, key selection criteria include its 4V–80V operating range, 10μA shutdown current, AEC-Q100 qualification, timed fault timer with auto-restart behavior, and dual-MOSFET gate drive architecture for surge + reverse polarity protection.
Technical Context
The LTC4364CMS-2#PBF implements two independent control loops: a voltage-regulating amplifier driving HGATE to clamp VOUT during overvoltage (e.g., load dump), and a current-sensing amplifier driving DGATE to maintain ~30mV forward drop across the ideal diode MOSFET. Its fault timer (TMR pin) uses voltage-dependent charging current - 5× higher during overcurrent than overvoltage - enabling SOA-aware MOSFET protection.
Unlike the latch-off LTC4364-1 variant, the LTC4364-2 version features automatic restart after fault cooldown: TMR cycles 32 times between 0.15V and 1.35V using ±2μA currents, then re-enables HGATE only if OV pin voltage is below threshold. UV and SHDN pins provide independent enable/disable paths with defined hysteresis and reset thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; withstands –40V reverse input without damage |
| Output Clamp Regulation | Adjustable via FB divider; typical 27V clamp during 92V input surge |
| Fault Timer Behavior | LTC4364-2 auto-restarts after 32-cycle TMR cooldown; 0.1% retry duty cycle |
| Ideal Diode Forward Drop | Regulated to ~30mV (typical) across external MOSFET; minimizes conduction loss |
| Shutdown Current | 10μA (max) at 12V - enables low-power battery-backed operation |
| Package & Temp Range | 16-lead MSOP; commercial grade (0°C to 70°C) per ordering code |
| AEC-Q100 Qualification | Qualified for automotive applications - supports functional safety requirements |
Pinout & Package
Package: 16-Lead Plastic MSOP (MS package), 3.0mm × 4.9mm footprint, exposed pad optional for thermal enhancement. θJA = 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain of HGATE-controlled pass MOSFET; triggers ENOUT high-impedance when VCC − VOUT < 0.7V |
| SENSE (Pin 2) | Current sense input | Monitors voltage across external sense resistor; sets 50mV (normal) or 25mV (short-circuit) current limit threshold |
| DGATE (Pin 4) | Ideal diode gate driver output | Drives second N-MOSFET; maintains ~30mV forward drop and rapidly pulls low on reverse current detection |
| SOURCE (Pin 5) | Common source reference | Return node for both MOSFET sources; defines anode of ideal diode and reference for SENSE/OUT differential sensing |
| HGATE (Pin 6) | Surge stopper gate driver output | Controls primary N-MOSFET pass device; regulates VOUT during overvoltage and limits current during overcurrent |
| VCC (Pin 8) | Main supply input | Accepts 4V–80V; survives –40V reverse bias; powers internal circuitry and charge pumps |
| SHDN (Pin 9) | Shutdown control input | Pull <0.5V to reduce ICC to 10μA; open or pull >2.2V to enable; clamped to 4V when floating |
| UV (Pin 10) | Undervoltage comparator input | Falls below 1.25V to disable HGATE/DGATE; 25–80mV hysteresis prevents chatter near threshold |
| OV (Pin 11) | Overvoltage comparator input | Rises above 1.25V to inhibit auto-retry; blocks HGATE turn-on at power-up if OV active |
| GND (Pin 12) | Device ground reference | Signal and power return; connects to PCB ground plane |
| FLT (Pin 13) | Fault open-drain output | Pulls low when TMR ≥ 1.25V (warning); sinks up to 2mA; withstands 80V |
| ENOUT (Pin 14) | Enable output open-drain | High-impedance when VOUT > VCC − 0.7V; latched; resets when VOUT < 2.2V |
| TMR (Pin 15) | Fault timer capacitor connection | Charged by voltage-dependent current source; thresholds at 1.25V (warn), 1.35V (turn-off), 0.15V (retry) |
| FB (Pin 16) | Feedback input for clamp regulation | Internal 1.25V reference; sets output clamp voltage via resistive divider from OUT to GND |
Key Features
| Feature | Design Value |
|---|---|
| Auto-restart fault recovery | LTC4364-2 performs 32-cycle TMR cooldown before re-enabling HGATE - avoids latch-up in intermittent fault conditions |
| Reverse input protection | Withstands –40V at VCC/SOURCE; DGATE actively shuts off ideal diode MOSFET upon reverse polarity detection |
| SOA-aware fault timing | TMR charging current scales with VCC–VOUT; shorter timeout under high stress preserves MOSFET safe operating area |
| Low-quiescent shutdown | 10μA max ICC(SHDN) enables use in always-on automotive modules without battery drain concerns |
| Integrated dual gate drivers | Separate HGATE (surge stopper) and DGATE (ideal diode) outputs eliminate need for external driver ICs or discrete logic |
| AEC-Q100 qualified | Validated for automotive temperature ranges and reliability requirements - suitable for front-end power in ADAS and body control units |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment head unit power rail during ISO 7637-2 Pulse 5a (load dump) events up to 120V for 400ms. IC Role / Device Role / Timing Role: LTC4364CMS-2#PBF regulates VOUT at 27V using HGATE-controlled MOSFET while maintaining uninterrupted operation; TMR ensures MOSFET stays within SOA. Use Value: Eliminates need for TVS diodes rated >1500W; reduces board space and thermal design burden versus passive clamping solutions. |
Use Scenario: Combining two independent 12V supplies (e.g., battery + DC/DC) to feed a single load with seamless switchover. IC Role / Device Role / Timing Role: LTC4364CMS-2#PBF drives back-to-back N-MOSFETs as ideal diodes - one per supply - enabling low-loss ORing with <30mV forward drop. Use Value: Replaces Schottky diodes with 0.3–0.5V drop; improves efficiency by >3% at 5A and eliminates reverse leakage current path. |
| Industrial Hot-Swap Port | Avionic Power Sequencing |
|
Use Scenario: Safely inserting a powered module into a live 24V backplane without causing bus disturbance or damaging host circuitry. IC Role / Device Role / Timing Role: LTC4364CMS-2#PBF controls inrush via HGATE slew rate and detects overcurrent with 50mV sense threshold; FLT signals upstream controller on fault. Use Value: Enables controlled ramp-up of output voltage; prevents brownout of shared rail; supports IEEE 1602.1 compliance for hot-swap systems. |
Use Scenario: Ensuring clean power-up sequence for flight-critical avionics where reverse polarity or input collapse must not disrupt downstream regulators. IC Role / Device Role / Timing Role: LTC4364CMS-2#PBF provides reverse input protection to –40V and holds VOUT during input short via DGATE-controlled ideal diode. Use Value: Prevents latch-up or latch-down during transient faults; maintains holdup time without large bulk capacitors due to low forward drop. |
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; extended temperature range (–40°C to 85°C) vs. 0°C to 70°C | Required for under-hood automotive or industrial environments with wider ambient swings | Select when operating beyond 70°C ambient or requiring extended temp qualification |
| LTC4365IMS-2#PBF | Includes integrated 100V N-channel MOSFETs (no external FETs needed); higher RDS(ON); no TMR pin or adjustable timing | Targeted at space-constrained designs where external MOSFET layout and thermal management are impractical | Choose for simplified BOM and layout at cost of lower efficiency and fixed fault response |
Compared with LTC4364IMS-2#PBF, the LTC4364CMS-2#PBF offers identical surge protection and ideal diode control but with tighter temperature grading - making it optimal for cost-sensitive commercial automotive modules. Versus LTC4365IMS-2#PBF, the LTC4364CMS-2#PBF provides full external MOSFET flexibility, precise SOA-aware timing, and lower conduction losses - essential for high-current or thermally demanding deployments.
Availability
LTC4364CMS-2#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial hot-swap ports, and avionic power sequencing applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LTC4364CMS-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 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-reliability power systems - designed specifically for automotive load dump immunity, reverse polarity survival, and seamless ideal diode ORing in mission-critical applications.
FAQ
What is the key functional difference between LTC4364CMS-2#PBF and LTC4364CMS-1#PBF?
The LTC4364CMS-2#PBF implements automatic restart after fault cooldown: once the TMR pin completes 32 cycles between 0.15V and 1.35V, HGATE re-enables if the OV pin is below threshold. In contrast, the LTC4364CMS-1#PBF latches HGATE off permanently until SHDN or UV is actively reset. This makes LTC4364CMS-2#PBF suitable for systems requiring self-recovery from transient overvoltage events without host intervention.
Can LTC4364CMS-2#PBF operate with input voltages below 4V?
No - the LTC4364CMS-2#PBF has a minimum operating supply voltage of 4V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Below this, internal charge pumps cannot sustain gate drive for HGATE or DGATE, and regulation loops become nonfunctional. For cold-cranking scenarios near 3.5V, system-level brownout detection and holdup capacitance must ensure VCC remains ≥4V during startup.
How does the TMR pin determine fault timing in LTC4364CMS-2#PBF?
The TMR pin is charged by a current source whose magnitude depends on VCC–VOUT: overvoltage mode draws ~1–2µA, while overcurrent mode draws ~5–10µA. This voltage-proportional charging ensures shorter fault timeouts under higher stress - keeping the external MOSFET within its safe operating area. Thresholds are fixed: 1.25V triggers FLT warning, 1.35V turns off HGATE, and 0.15V initiates retry cycling.
What is the maximum reverse input voltage the LTC4364CMS-2#PBF can withstand?
The LTC4364CMS-2#PBF withstands –40V applied to the VCC and SOURCE pins, as confirmed in Absolute Maximum Ratings and Applications Information. This enables direct connection to automotive batteries during reverse polarity connection events. The internal protection circuitry holds DGATE and HGATE low under reverse bias, blocking current flow and preventing damage to external MOSFETs or downstream loads.
Does LTC4364CMS-2#PBF require external components for basic surge protection operation?
Yes - the LTC4364CMS-2#PBF requires at minimum: two external N-channel MOSFETs (one for HGATE, one for DGATE), a feedback resistor divider on FB for output clamp setting, a capacitor on TMR for fault timing, and bypass capacitors on VCC and OUT. The typical application circuit in the datasheet shows 10kΩ/4.99kΩ divider for 27V clamp, 6.8nF on HGATE, and 6.8µF on TMR - all mandatory for functional operation.
LTC4364CMS-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-TFSOP (0.118", 3.00mm 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-MSOP
LTC4364CMS-2#PBF FAQ
1.How can I place an order for LTC4364CMS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364CMS-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 LTC4364CMS-2#PBF reliable?
The price and inventory of LTC4364CMS-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 LTC4364CMS-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364CMS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364CMS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364CMS-2#PBF?
LTC4364CMS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364CMS-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 LTC4364CMS-2#PBF?
For technical support, including LTC4364CMS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364CMS-2#PBF requirements.
6.How does Aetrix verify that LTC4364CMS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364CMS-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 LTC4364CMS-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364CMS-2#PBF?
All LTC4364CMS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364CMS-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 LTC4364CMS-2#PBF part is unused and in its original packaging.
Return procedure for LTC4364CMS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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