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Analog Devices Inc. LTC4364CS-2#TRPBF
- Part No.:
- LTC4364CS-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC4364CS-2#TRPBF.pdf
- Description:
- SURGE STOPPER W/DIODE SMD
- Quantity:
- Payment:
- Shipping:
Inventory:8,011
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Product details
Overview
LTC4364CS-2#TRPBF 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 features automatic fault recovery with 0.1% retry duty cycle. Used in 12V/24V vehicle electronics during load dump events.
For engineers reviewing the LTC4364CS-2#TRPBF datasheet, LTC4364CS-2#TRPBF pinout, LTC4364CS-2#TRPBF application, or LTC4364CS-2#TRPBF equivalent, key selection criteria include its 4V–80V operating range, 14-pin DFN / 16-pin SO package options, AEC-Q100 qualification, timed overcurrent/overvoltage fault response, and dual-MOSFET gate drive architecture for surge + reverse polarity protection.
Technical Context
The LTC4364CS-2#TRPBF integrates two independent control loops: a voltage-regulating surge stopper (HGATE) that maintains precise FB = 1.25V during overvoltage, and an ideal diode controller (DGATE) that regulates VSD = 30mV forward drop. Its fault timer (TMR) uses voltage-dependent current sources-5× higher pull-up during overcurrent-to dynamically scale timeout based on VCC–VOUT, ensuring MOSFET safe operating area compliance.
Unlike the latch-off LTC4364-1 variant, the LTC4364CS-2#TRPBF implements auto-retry via a 32-cycle TMR cool-down sequence (0.15V ↔ 1.35V) with 2µA charge/discharge, enabling automatic re-enabling of HGATE only after OV pin falls below 1.25V threshold-critical for unattended systems requiring continuous operation post-transient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; withstands –40V reverse input without damage |
| Output Clamp Accuracy | ±2.4% regulation at FB = 1.25V (1.22V–1.28V over temp) |
| Fault Timer Thresholds | FLT warning at 1.25V; HGATE turn-off at 1.35V; retry enable at 0.15V (32-cycle hysteresis) |
| Ideal Diode Forward Drop | Regulated to 30mV typical (10–48mV over VCC and temp); minimizes conduction loss vs Schottky |
| Shutdown Current | 10µA max at 12V (ICC(SHDN)), enabling low-power battery-backed operation |
| Overcurrent Threshold | 50mV (OUT > 2.5V), reduced to 25mV (OUT < 1.5V) for short-circuit protection |
| Retry Duty Cycle | 0.1% typical during overvoltage faults; ensures thermal recovery before re-engagement |
Pinout & Package
Package: 16-Lead Plastic SO (S Package), 0°C to 70°C ambient operating range, exposed pad not applicable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense reference | 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 thresholds |
| DGATE (Pin 4) | Ideal diode gate driver output | Drives second N-MOSFET for reverse polarity protection and holdup; fast 130mA pull-down blocks reverse current |
| SOURCE (Pin 5) | Common source return node | Anode reference for ideal diode; sets DGATE/HGATE clamping baseline (SOURCE + 12V max) |
| HGATE (Pin 6) | Surge stopper gate driver output | Controls main N-MOSFET pass device; regulates output via voltage loop (FB) or current loop (SENSE–OUT) |
| VCC (Pin 8) | Main supply input | Accepts 4V–80V; survives –40V reverse bias; powers internal charge pump and logic |
| SHDN (Pin 9) | Global shutdown control | Pull < 0.5V to reduce ICC to 10µA; open or pull > 2.2V for normal operation |
| 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; inhibits auto-retry until OV falls below threshold (LTC4364-2 behavior) |
| GND (Pin 12) | Device ground reference | Logic and analog ground; connects to PCB ground plane |
| FLT (Pin 13) | Fault indicator open-drain output | Pulls low at TMR = 1.25V (warning); remains low until fault cleared and cool-down complete |
| ENOUT (Pin 14) | Enable output open-drain | High-impedance when VOUT > VCC–0.7V; latched low until VOUT < 2.2V |
| TMR (Pin 15) | Fault timer capacitor connection | Capacitor-to-ground sets timing for warning, turn-off, and auto-retry cycles; current scales with VCC–VOUT |
| FB (Pin 16) | Voltage regulation feedback input | Connects to resistive divider from OUT to GND; sets clamp voltage as VOUT = 1.25V × (1 + R1/R2) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (–40°C to 125°C junction), supporting ISO 7637-2 load dump immunity |
| Auto-retry fault recovery | 32-cycle TMR hysteresis (0.15V ↔ 1.35V) enables automatic re-engagement after transient clearance-no manual reset required |
| Dual independent gate drivers | HGATE controls surge-limiting pass MOSFET; DGATE controls ideal diode MOSFET-enables simultaneous surge + reverse polarity protection |
| Voltage-dependent fault timing | TMR pull-up current increases with VCC–VOUT, shortening timeout during high-dissipation conditions to protect MOSFET SOA |
| Reverse input protection to –40V | VCC withstands –40V reverse bias; UV/OV comparators remain functional; internal clamps prevent latch-up |
| Low 10µA shutdown current | Enables always-on monitoring in battery-powered systems without significant parasitic drain |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: 12V/24V vehicle ECU subjected to ISO 7637-2 Pulse 5a (120V/100ms) or load dump transients. IC Role / Device Role / Timing Role: LTC4364CS-2#TRPBF acts as primary surge limiter-regulates output at 27V while sourcing up to 4A, then auto-retries after transient clears. Use Value: Prevents microcontroller reset or EEPROM corruption during engine cranking or alternator failure; eliminates need for TVS diodes with limited lifetime. |
Use Scenario: Dual 24V DC supplies feeding a single load in telecom or industrial control cabinet. IC Role / Device Role / Timing Role: LTC4364CS-2#TRPBF drives back-to-back N-MOSFETs in ORing configuration, enabling seamless switchover between supplies with <1µs reverse current blocking. Use Value: Replaces bulky Schottky diodes; reduces forward drop from ~0.4V to ~0.03V, cutting conduction loss by >90% and eliminating thermal derating. |
| Hot-Swap Power Entry | Industrial Brownout Holdup |
|
Use Scenario: Live insertion of a 48V board into powered backplane with potential inrush or misalignment spikes. IC Role / Device Role / Timing Role: LTC4364CS-2#TRPBF monitors VIN for overvoltage/overcurrent during plug-in; limits inrush via HGATE slew rate control and initiates auto-retry if fault persists. Use Value: Prevents arcing at connectors and bus voltage collapse; supports IEEE 1621-compliant hot-swap sequencing without external controllers. |
Use Scenario: Programmable logic controller (PLC) I/O module experiencing 100ms AC line dropout causing 24V rail sag. IC Role / Device Role / Timing Role: LTC4364CS-2#TRPBF's ideal diode (DGATE) holds VOUT using local bulk capacitance when input sags or shorts, maintaining logic supply above 2.2V. Use Value: Extends system uptime during brief outages; avoids watchdog timeouts and process interruption without adding supercapacitor circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection and ideal diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365CS-2#TRPBF | Wider 2.5V–80V operating range; integrated 100V VCC clamp; same pinout and auto-retry behavior | Supports cold-crank down to 2.5V; eliminates need for external VCC clamp Zener in low-VIN designs | Select when cold-cranking immunity below 4V is required; otherwise functionally interchangeable |
| TPS26631RGER | Single-channel hot-swap controller (no ideal diode); fixed 28.5V overvoltage clamp; no auto-retry-latches off | Designed for data-center 12V/48V distribution; lacks reverse polarity protection and output holdup capability | Choose for cost-sensitive, non-automotive applications where latch-off is acceptable and ideal diode not needed |
Compared with LTC4364CS-2#TRPBF, LTC4365CS-2#TRPBF extends low-VIN operation and integrates clamp protection, while TPS26631RGER simplifies design for basic overvoltage limiting but sacrifices reverse protection, holdup, and auto-recovery-making LTC4364CS-2#TRPBF uniquely suited for automotive and unattended industrial systems.
Availability
LTC4364CS-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, redundant supply ORing, hot-swap power entry, and industrial brownout holdup requiring stable component supply across temperature and lifecycle.
Supply support for LTC4364CS-2#TRPBF 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 safety markets.
The LTC4364CS-2#TRPBF belongs to Analog Devices' Surge Stopper® family, engineered specifically for robust front-end power protection in harsh environments-including automotive, avionics, and industrial control-where reliability under voltage transients is non-negotiable.
FAQ
What is the key functional difference between LTC4364CS-2#TRPBF and LTC4364CS-1#TRPBF?
The LTC4364CS-2#TRPBF implements automatic fault recovery: after overvoltage or overcurrent timeout, it executes a 32-cycle TMR cool-down (0.15V ↔ 1.35V) and re-enables HGATE if the OV pin falls below 1.25V. In contrast, the LTC4364CS-1#TRPBF latches HGATE off permanently until SHDN or UV is actively pulsed. This makes LTC4364CS-2#TRPBF ideal for unattended systems requiring autonomous recovery.
Does LTC4364CS-2#TRPBF require external components to set the overvoltage clamp voltage?
Yes. The LTC4364CS-2#TRPBF uses the FB pin to regulate output voltage during overvoltage events. A resistive divider from OUT to GND sets the clamp level as VOUT = 1.25V × (1 + R1/R2). For example, a 22kΩ (R1) and 1.18kΩ (R2) divider yields a 27V clamp. No other active components are needed-the internal 1.25V reference and error amplifier handle closed-loop regulation.
Can LTC4364CS-2#TRPBF protect against reverse battery connection?
Yes. The LTC4364CS-2#TRPBF withstands –40V applied to VCC (reverse battery) without damage. Its UV comparator disables HGATE/DGATE when input drops below 1.25V, and internal clamps prevent latch-up. Combined with the ideal diode function (DGATE-controlled MOSFET), it blocks reverse current flow from output to input, protecting downstream circuitry during polarity reversal.
What is the maximum transient voltage LTC4364CS-2#TRPBF can survive at the input?
The LTC4364CS-2#TRPBF is specified to withstand a 200V/1ms transient at VIN per typical application data. Its absolute maximum VCC rating is 100V, but with proper external clamping (e.g., TVS or Zener on VCC), it reliably suppresses ISO 7637-2 Pulse 5a (120V/100ms) and higher-energy surges common in 24V automotive systems-provided the external MOSFET and layout absorb the bulk energy.
How does the fault timer (TMR) behave differently during overvoltage versus overcurrent events?
During overvoltage, the TMR pin charges with a current proportional to VCC–VOUT. During overcurrent, the pull-up current is 5× higher for the same voltage difference-accelerating TMR rise time to force faster HGATE turn-off and protect the MOSFET during high-current shorts. Both paths trigger FLT at 1.25V and HGATE turn-off at 1.35V, but overcurrent faults resolve more rapidly due to steeper TMR slope.
LTC4364CS-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
LTC4364CS-2#TRPBF FAQ
1.How can I place an order for LTC4364CS-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364CS-2#TRPBF 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 LTC4364CS-2#TRPBF reliable?
The price and inventory of LTC4364CS-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4364CS-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4364CS-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364CS-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364CS-2#TRPBF?
LTC4364CS-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364CS-2#TRPBF 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 LTC4364CS-2#TRPBF?
For technical support, including LTC4364CS-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364CS-2#TRPBF requirements.
6.How does Aetrix verify that LTC4364CS-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4364CS-2#TRPBF 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 LTC4364CS-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4364CS-2#TRPBF?
All LTC4364CS-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364CS-2#TRPBF, 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 LTC4364CS-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4364CS-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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