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Analog Devices Inc. LTC4364CDE-2#TRPBF
- Part No.:
- LTC4364CDE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC4364CDE-2#TRPBF.pdf
- Description:
- SURGE STOPPER W/DIODE 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
LTC4364CDE-2#TRPBF 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), and drives two external N-channel MOSFETs - one for overvoltage/current limiting (HGATE), one for reverse-input protection and holdup (DGATE). Designed for 4V–80V input, it supports AEC-Q100-compliant 12V/24V systems with 0.1% retry duty cycle during faults.
For engineers reviewing the LTC4364CDE-2#TRPBF datasheet, LTC4364CDE-2#TRPBF pinout, LTC4364CDE-2#TRPBF application, or LTC4364CDE-2#TRPBF equivalent, key selection criteria include fault timer programmability, dual-MOSFET gate drive architecture, ±40V reverse input tolerance, 10μA shutdown current, and DFN-14 package thermal performance in space-constrained hot-swap and ORing designs.
Technical Context
The LTC4364CDE-2#TRPBF implements independent analog control loops: a voltage amplifier regulating HGATE to maintain 1.25V at FB during overvoltage, and a current amplifier limiting ∆VSNS to 50mV (or 25mV during output short) by modulating HGATE. Its TMR pin integrates a programmable fault timer with three thresholds (1.25V warning, 1.35V turn-off, 0.15V retry) and 32-cycle cool-down cycling for automatic recovery.
Its ideal diode function uses a dedicated DGATE driver that maintains ~30mV forward drop across the external MOSFET (M2), actively pulls DGATE to SOURCE within 1.5μs upon reverse current detection, and disables DGATE when HGATE turns off. The device tolerates –40V reverse input and –20V reverse output while maintaining latch-free auto-retry behavior unique to the -2 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 80V operating; withstands –40V reverse input and 200V/1ms transient |
| Output Clamp Accuracy | ±1% FB reference (1.22V–1.28V); enables precise 27V regulation via resistor divider |
| Fault Timer Resolution | TMR capacitor sets timing; pull-up current scales with VCC–VOUT to enforce SOA compliance |
| Shutdown Current | 10μA typical at 12V - enables always-on monitoring without battery drain |
| Ideal Diode Forward Drop | 30mV regulated (typical) across M2 source-drain - reduces conduction loss vs Schottky |
| Retry Behavior | LTC4364-2 variant: automatic 32-cycle cool-down and restart if OV pin <1.25V |
| Package Thermal Resistance | θJA = 45°C/W (DFN-14, 4mm × 3mm) - supports 4A continuous load with minimal heatsinking |
Pinout & Package
Package: 14-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 15), rated for 0°C to 70°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain of HGATE-controlled MOSFET; triggers ENOUT high-impedance when VCC–VOUT < 0.7V |
| SENSE (Pin 2) | Current sense input | Monitors voltage across external sense resistor; controls HGATE to limit ∆VSNS to 50mV (25mV during short) |
| DGATE (Pin 3) | Ideal diode gate drive output | Drives second N-MOSFET for reverse protection; fast 130mA pull-down on reverse current detection |
| SOURCE (Pin 4) | Common source return | Anode node for ideal diode; reference for DGATE/HGATE clamping (12V above SOURCE) |
| HGATE (Pin 5) | Surge stopper gate drive output | Controls main pass MOSFET; regulated by voltage/current amplifiers for OV/OC protection |
| VCC (Pin 6) | Positive supply input | Power rail for internal circuitry; operates from 4V–80V; survives –40V reverse bias |
| SHDN (Pin 7) | 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 8) | Undervoltage comparator input | 1.25V threshold; holds HGATE/DGATE off below threshold; hysteresis ≥25mV |
| OV (Pin 9) | Overvoltage comparator input | 1.25V threshold; inhibits retry during overvoltage; must fall below threshold for LTC4364-2 restart |
| GND (Pin 10) | Device ground | Reference for all analog circuits and open-drain outputs (FLT, ENOUT) |
| FLT (Pin 11) | Fault indicator output | Open-drain; pulls low at TMR = 1.25V (warning), stays low until fault cleared and cool-down completes |
| ENOUT (Pin 12) | Enable output | Open-drain; high-impedance when VOUT > VCC–0.7V; latched; resets when VOUT < 2.2V |
| TMR (Pin 13) | Fault timer capacitor connection | Charged by current sources scaled to VCC–VOUT; thresholds at 1.25V (warn), 1.35V (off), 0.15V (retry) |
| FB (Pin 14) | Feedback input | 1.25V reference point; connects to resistive divider from OUT to GND to set clamp voltage |
| Exposed Pad (Pin 15) | Thermal pad | Optional GND connection; improves θJA to 45°C/W in DFN-14 package |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | LTC4364-2 variant performs 32-cycle TMR cool-down and restarts HGATE if OV condition clears |
| Reverse input protection | Withstands –40V at VCC/SOURCE pins; DGATE actively disables M2 during reverse polarity |
| Programmable fault timing | TMR capacitor sets warning, turn-off, and retry intervals; current scaling ensures SOA compliance |
| Low-power shutdown mode | 10μA ICC(SHDN) enables always-on surge monitoring in battery-backed systems |
| Integrated ideal diode control | Maintains 30mV forward drop across M2; eliminates Schottky losses and improves holdup time |
| AEC-Q100 qualification | Rated for 0°C to 70°C ambient; validated for automotive surge environments including load dump |
Applications
| Automotive Load Dump Protection | Industrial Redundant Power ORing |
|---|---|
Use Scenario: 12V/24V vehicle electronics subjected to ISO 16750-2 load dump transients up to 120V. IC Role / Device Role / Timing Role: Surge stopper regulating output at 27V while driving external N-MOSFET; ideal diode prevents backfeed during alternator failure. Use Value: Enables uninterrupted operation of ADAS ECUs and infotainment during 100ms+ surges without derating MOSFET SOA. |
Use Scenario: Dual 48V DC power supplies feeding a common load with automatic switchover on failure. IC Role / Device Role / Timing Role: Controls back-to-back N-MOSFETs as active ORing elements; DGATE blocks reverse current, HGATE limits inrush. Use Value: Eliminates 0.4V Schottky drop per rail, reducing heat generation and improving system efficiency by >3% at 10A. |
| Hot-Swap Controller for Telecom Shelf | Medical Equipment Input Protection |
Use Scenario: Insertion of powered line cards into live 48V telecom backplanes with strict inrush and fault isolation requirements. IC Role / Device Role / Timing Role: Limits inrush current via controlled HGATE ramp; detects overcurrent and initiates timed shutdown with FLT signaling. Use Value: Prevents bus collapse during insertion; 0.1% retry duty cycle avoids nuisance tripping during brief overload events. |
Use Scenario: Patient-connected devices requiring fail-safe power input with reverse polarity and surge immunity per IEC 60601-1. IC Role / Device Role / Timing Role: Dual-protection controller: UV/OV monitoring + ideal diode blocking; shuts down cleanly on –40V reverse input. Use Value: Meets creepage/clearance requirements via single-chip solution; eliminates discrete diode and TVS cascades. |
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 |
|---|---|---|---|
| LTC4365CDE-2#TRPBF | Wider 2.5V–80V input range; integrated 100V VCC clamp; no UV pin; fixed 1.25V FB reference | Better suited for cold-crank (2.5V) and ultra-high-voltage (>80V) systems; lacks undervoltage reset capability | Select when cold-cranking support or simplified UV handling is required; not drop-in due to missing UV pin |
| TPS26631RGER | Single-chip 60V eFuse with integrated MOSFET; no ideal diode function; fixed 28V OVP; 1.5ms fault response | Lower BOM count for basic overcurrent/overvoltage; no reverse protection or output holdup capability | Choose for cost-sensitive, space-constrained designs where ideal diode and holdup are unnecessary |
Compared with LTC4364CDE-2#TRPBF, LTC4365CDE-2 offers extended low-voltage operation but removes UV configurability, while TPS26631RGER reduces component count at the expense of dual-MOSFET flexibility and reverse-input resilience.
Availability
LTC4364CDE-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial redundant power ORing, telecom hot-swap control, and medical equipment input protection requiring stable component supply across temperature and lifecycle variations.
Supply support for LTC4364CDE-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, industrial automation, and automotive safety systems.
The LTC4364 product line delivers robust front-end protection for high-availability power systems, combining surge suppression, overvoltage regulation, and ideal diode functionality in a single IC for 4V–80V rails.
FAQ
What distinguishes LTC4364CDE-2#TRPBF from the LTC4364-1 variant?
The LTC4364CDE-2#TRPBF implements automatic fault recovery: after HGATE turn-off due to overvoltage or overcurrent, it executes a 32-cycle TMR cool-down and restarts if the OV pin falls below 1.25V. In contrast, the LTC4364-1 latches off permanently until SHDN or UV is cycled. This makes LTC4364CDE-2#TRPBF ideal for systems requiring self-healing behavior without host intervention.
How does LTC4364CDE-2#TRPBF achieve reverse input protection?
LTC4364CDE-2#TRPBF achieves reverse input protection by driving the DGATE pin to actively control a second external N-channel MOSFET configured as an ideal diode. When reverse voltage exceeds –30mV, the IC pulls DGATE to SOURCE within 1.5μs, turning off the MOSFET. It also tolerates –40V applied directly to VCC/SOURCE pins without damage, enabling robust battery-reversal immunity.
Can LTC4364CDE-2#TRPBF regulate output voltage to a custom value other than 27V?
Yes. LTC4364CDE-2#TRPBF regulates output using the FB pin and an external resistor divider from OUT to GND. With its precise 1.25V internal reference (±1%), any output clamp voltage can be set - for example, 15V using R1=118kΩ and R2=10kΩ. The datasheet provides design equations and layout guidance for stable regulation across temperature and load.
What is the role of the TMR pin in LTC4364CDE-2#TRPBF fault management?
The TMR pin in LTC4364CDE-2#TRPBF serves as the central fault timing node: it is charged by current sources proportional to VCC–VOUT during overvoltage or overcurrent events. At 1.25V, FLT asserts warning; at 1.35V, HGATE turns off; at 0.15V (after 32 cycles), auto-retry initiates. This adaptive timing ensures MOSFET SOA compliance across varying transient magnitudes.
Is LTC4364CDE-2#TRPBF compatible with standard 12V automotive battery systems?
Yes. LTC4364CDE-2#TRPBF is explicitly designed for 12V and 24V automotive systems: it operates from 4V (supporting cold-crank), withstands 200V/1ms load dump transients, meets AEC-Q100 Grade C (0°C to 70°C), and provides reverse-battery protection to –40V. Its DFN-14 package supports high-density placement near battery inputs.
LTC4364CDE-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 14-WFDFN Exposed Pad
- 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:
- 14-DFN (4x3)
LTC4364CDE-2#TRPBF FAQ
1.How can I place an order for LTC4364CDE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364CDE-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 LTC4364CDE-2#TRPBF reliable?
The price and inventory of LTC4364CDE-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 LTC4364CDE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4364CDE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364CDE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364CDE-2#TRPBF?
LTC4364CDE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364CDE-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 LTC4364CDE-2#TRPBF?
For technical support, including LTC4364CDE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364CDE-2#TRPBF requirements.
6.How does Aetrix verify that LTC4364CDE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4364CDE-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 LTC4364CDE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4364CDE-2#TRPBF?
All LTC4364CDE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364CDE-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 LTC4364CDE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4364CDE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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