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Analog Devices Inc. LTC4364IDE-2#TRPBF
- Part No.:
- LTC4364IDE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC4364IDE-2#TRPBF.pdf
- Description:
- SURGE STOPPER W/DIODE 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,341
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Product details
Overview
LTC4364IDE-2#TRPBF from Analog Devices is a surge stopper with ideal diode controller for automotive-grade overvoltage and reverse-input protection. It regulates output at 27V during 92V/1ms transients, delivers 4A at 12V, withstands –40V reverse input, and features auto-retry fault recovery with 0.1% duty cycle. It drives two external N-channel MOSFETs to replace Schottky diodes and suppress load-dump surges in vehicle power systems.
For engineers reviewing the LTC4364IDE-2#TRPBF datasheet, LTC4364IDE-2#TRPBF pinout, LTC4364IDE-2#TRPBF application, or LTC4364IDE-2#TRPBF equivalent, key selection criteria include adjustable OV/UV thresholds (1.25V ±30mV), 14-lead DFN package with exposed pad, –40°C to 85°C operating range, AEC-Q100 qualification, and precise 50mV current-sense threshold with temperature-compensated hysteresis.
Technical Context
The LTC4364IDE-2#TRPBF integrates dual control loops: a voltage amplifier regulating HGATE to clamp VOUT via FB feedback, and a current amplifier limiting ∆VSNS to 50mV (or 25mV during output short). Its fault timer uses TMR pin voltage ramping-charged by differential VCC–VOUT-to distinguish overvoltage (slower ramp) from overcurrent (5× faster ramp) and trigger HGATE turn-off at 1.35V.
Unlike the latch-off LTC4364-1 variant, the LTC4364IDE-2#TRPBF implements automatic restart after fault clearance: TMR cycles 32 times between 0.15V and 1.35V using 2µA charge/discharge currents, then re-enables HGATE only if OV < 1.25V. Its ideal diode controller maintains ∆VSD ≈ 30mV forward drop and actively pulls DGATE to SOURCE within 1.5µs upon reverse current detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; survives –40V reverse input and 200V/1ms transient at VIN |
| Overvoltage Clamp Accuracy | FB reference = 1.25V ±0.03V; enables precise 27V output regulation via resistor divider |
| Current Limit Threshold | ∆VSNS = 50mV (typ.) above 2.5V VOUT; reduces to 25mV when VOUT < 1.5V for short-circuit robustness |
| Fault Recovery Behavior | LTC4364-2 auto-retry: 0.1% duty cycle, 32-cycle TMR cooldown, requires OV < 1.25V to restart |
| Shutdown Current | 10µA max at 12V - enables low-power battery monitoring during vehicle off-state |
| Package & Temp Grade | 14-lead 4mm × 3mm DFN with exposed pad; rated for –40°C to +85°C industrial/automotive use |
| AEC-Q100 Qualification | Qualified per AEC-Q100 Rev G for automotive applications - supports under-hood deployment |
Pinout & Package
Package: 14-lead (4mm × 3mm) plastic DFN with exposed thermal pad (Pin 15), RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain voltage of HGATE-controlled MOSFET; triggers ENOUT high-impedance state when VCC − VOUT < 0.7V |
| SENSE (Pin 2) | Current sense amplifier input | Measures voltage across external sense resistor; controls HGATE to maintain 50mV (or 25mV) ∆VSNS |
| DGATE (Pin 3) | Ideal diode gate drive output | Drives second N-MOSFET; regulates forward drop to ~30mV and pulls low within 1.5µs on reverse current |
| SOURCE (Pin 4) | Common source return / ideal diode anode | Reference node for both SENSE and DGATE; connects to sources of back-to-back N-MOSFETs |
| HGATE (Pin 5) | Surge stopper gate drive output | Controls primary N-MOSFET pass device; regulated to clamp VOUT during overvoltage events |
| 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 | Pull <0.5V to reduce ICC to 10µA; open or pull >2.2V for normal operation; clamped to 4V internally |
| UV (Pin 8) | Undervoltage comparator input | Threshold = 1.25V ±30mV; hysteresis = 25–80mV; holds HGATE/DGATE off during cold-crank brownout |
| OV (Pin 9) | Overvoltage comparator input | Threshold = 1.25V ±30mV; disables auto-retry until OV falls below threshold post-fault |
| GND (Pin 10) | Device ground reference | Signal and power return; connects to PCB ground plane and exposed pad for thermal management |
| FLT (Pin 11) | Fault open-drain output | Pulls low at TMR = 1.25V (warning); sinks 2mA; withstands up to 80V; indicates imminent HGATE turn-off |
| ENOUT (Pin 12) | Enable output open-drain | High-impedance when VOUT > VCC − 0.7V; latched; resets when VOUT < 2.2V - monitors MOSFET conduction state |
| TMR (Pin 13) | Fault timer capacitor connection | Charged by current proportional to VCC−VOUT; sets warning (1.25V), turn-off (1.35V), and retry (0.15V) thresholds |
| FB (Pin 14) | Voltage regulation feedback input | Internal 1.25V reference; closed-loop control point for overvoltage clamp; connect to resistive divider from OUT |
| Exposed Pad (Pin 15) | Thermal pad / optional GND | Improves thermal dissipation; may be left floating or connected to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | LTC4364-2 variant performs 32-cycle TMR cooldown and restarts only if OV < 1.25V - avoids lockout during intermittent faults |
| Reverse input protection | Withstands –40V at VCC and –20V at VOUT; DGATE actively shuts off M2 within 1.5µs on reverse current |
| Adjustable overvoltage clamp | FB-based regulation enables precise output clamping (e.g., 27V) using standard resistor dividers - no trimming required |
| Low shutdown current | 10µA max ICC(SHDN) at 12V allows integration into always-on vehicle subsystems without battery drain |
| Robust transient immunity | Survives 200V/1ms surge at VIN and operates down to 4V - supports automotive cold-crank and load-dump scenarios |
| AEC-Q100 qualified | Rated for –40°C to +85°C ambient; validated for automotive reliability - suitable for under-hood ECU power rails |
Applications
| Automotive Load-Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment ECUs during 12V battery load-dump transients exceeding 90V. IC Role / Device Role / Timing Role: Surge stopper controlling HGATE-driven N-MOSFET to clamp VOUT at 27V while sustaining 4A load current. Use Value: Prevents downstream DC/DC converter failure and ensures uninterrupted operation during ISO 7637-2 Pulse 5a events. |
Use Scenario: ORing two independent 12V supplies (e.g., main battery + backup) to feed a single load. IC Role / Device Role / Timing Role: Ideal diode controller driving DGATE to replace Schottky diodes, minimizing forward drop and reverse leakage. Use Value: Reduces power loss by >75% vs. discrete diodes and eliminates reverse current flow during supply switchover. |
| Hot-Swap Power Insertion | Industrial 24V System Protection |
|
Use Scenario: Safely inserting powered modules into live 24V backplanes without arcing or bus disturbance. IC Role / Device Role / Timing Role: Controls inrush via HGATE slew rate and limits fault current using ∆VSNS sensing. Use Value: Enables controlled turn-on with <100µs overcurrent response and prevents bus collapse during plug-in events. |
Use Scenario: Protecting PLC I/O modules from field-wiring faults, including reverse polarity and 48V surges. IC Role / Device Role / Timing Role: Dual-function controller providing UV lockout (<4V), OV clamp (≤30V), and reverse input blocking (–40V). Use Value: Eliminates need for separate TVS, fuse, and diode protection components - reduces BOM count and board area. |
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 |
|---|---|---|---|
| LTC4365IDE-2#TRPBF | Wider 2.5V–100V input range; integrated 100V MOSFET drivers; higher 100mV current limit threshold | Supports higher-voltage industrial systems (e.g., 48V telecom); less suited for 12V automotive cold-crank due to 2.5V min VCC | Select when input exceeds 80V or when higher current limit tolerance is acceptable for reduced MOSFET stress |
| TPS26631RGER | Single-chip solution with integrated 80V MOSFET; fixed 28V OV clamp; no ideal diode function; 2.7V–60V VCC range | Lacks reverse-input protection and output holdup capability; limited to basic overvoltage cutoff without regulation | Choose for cost-sensitive, space-constrained designs where ideal diode functionality is unnecessary and fixed-clamp suffices |
Compared with LTC4365IDE-2#TRPBF and TPS26631RGER, the LTC4364IDE-2#TRPBF uniquely combines precision 27V regulation, –40V reverse input tolerance, and auto-retry fault recovery in a compact DFN package - making it optimal for automotive 12V systems requiring uninterrupted operation during load dump.
Availability
LTC4364IDE-2#TRPBF is available at Aetrix Electronics and suitable for automotive ECU protection, redundant power ORing, hot-swap insertion, industrial 24V system hardening, and battery-backed holdup applications requiring stable component supply across extended temperature ranges.
Supply support for LTC4364IDE-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 industrial, automotive, communications, and healthcare markets.
The LTC4364IDE-2#TRPBF belongs to Analog Devices' Surge Stopper family, engineered specifically for robust, wide-input-range power path protection in harsh automotive and industrial environments where reliability under voltage transients is critical.
FAQ
What is the key functional difference between LTC4364IDE-2#TRPBF and LTC4364IDE-1#TRPBF?
The LTC4364IDE-2#TRPBF implements automatic fault recovery: after overvoltage or overcurrent timeout, it performs a 32-cycle TMR cooldown and restarts HGATE if OV < 1.25V. In contrast, the LTC4364IDE-1#TRPBF latches HGATE off permanently until SHDN or UV is cycled. This makes LTC4364IDE-2#TRPBF ideal for systems requiring self-healing behavior without manual reset.
How does LTC4364IDE-2#TRPBF achieve reverse input protection?
The LTC4364IDE-2#TRPBF achieves reverse input protection by driving DGATE to control a second N-channel MOSFET configured as an ideal diode. When reverse current flows (VOUT > VSOURCE), the IC detects ∆VSD < –30mV and pulls DGATE to SOURCE within 1.5µs, turning off the MOSFET. It also withstands –40V applied directly to VCC without damage.
Can LTC4364IDE-2#TRPBF regulate output voltage to a value other than 27V?
Yes - the LTC4364IDE-2#TRPBF regulates output voltage via the FB pin, which references an internal 1.25V bandgap. By selecting appropriate resistor values in the FB divider network (e.g., 4.99kΩ and 90.9kΩ), users can set any output clamp voltage - such as 24V, 27V, or 30V - with ±1% accuracy over temperature and line conditions.
What is the purpose of the TMR pin on LTC4364IDE-2#TRPBF, and how is its timing determined?
The TMR pin on LTC4364IDE-2#TRPBF sets fault timing via an external capacitor to ground. Its voltage ramps upward at a rate proportional to (VCC – VOUT); overvoltage causes slower ramping, while overcurrent increases ramp rate 5×. Thresholds at 1.25V (FLT warning), 1.35V (HGATE turn-off), and 0.15V (retry enable) define the fault sequence and auto-restart behavior.
Is LTC4364IDE-2#TRPBF qualified for automotive applications, and what does that entail?
Yes - LTC4364IDE-2#TRPBF is AEC-Q100 qualified for automotive use (Grade I: –40°C to +85°C). This entails rigorous testing for temperature cycling, humidity, mechanical shock, ESD, and long-term reliability under automotive stress conditions, enabling deployment in engine control units, ADAS modules, and body electronics where safety and longevity are mandatory.
LTC4364IDE-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)
LTC4364IDE-2#TRPBF FAQ
1.How can I place an order for LTC4364IDE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364IDE-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 LTC4364IDE-2#TRPBF reliable?
The price and inventory of LTC4364IDE-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 LTC4364IDE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4364IDE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364IDE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364IDE-2#TRPBF?
LTC4364IDE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364IDE-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 LTC4364IDE-2#TRPBF?
For technical support, including LTC4364IDE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364IDE-2#TRPBF requirements.
6.How does Aetrix verify that LTC4364IDE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4364IDE-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 LTC4364IDE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4364IDE-2#TRPBF?
All LTC4364IDE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364IDE-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 LTC4364IDE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4364IDE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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