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Analog Devices Inc. LTC4364HDE-2#TRPBF
- Part No.:
- LTC4364HDE-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC4364HDE-2#TRPBF.pdf
- Description:
- SURGE STOPPER W/DIODE 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,729
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Product details
Overview
LTC4364HDE-2#TRPBF from Analog Devices is a surge stopper with ideal diode controller designed 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 auto-retry fault recovery. Used in 12V/24V vehicle electronics during load dump events.
For engineers reviewing the LTC4364HDE-2#TRPBF datasheet, LTC4364HDE-2#TRPBF pinout, LTC4364HDE-2#TRPBF application, or LTC4364HDE-2#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating range, 0.1% retry duty cycle under overvoltage, 10μA shutdown current, integrated dual-MOSFET gate drive (HGATE/DGATE), and AEC-Q100 qualification for automotive use.
Technical Context
The LTC4364HDE-2#TRPBF implements dual-loop protection: a voltage amplifier regulates HGATE to clamp VOUT via external N-channel MOSFET M1 during overvoltage, while a current amplifier limits ∆VSNS to 50mV (or 25mV during output short) to control M1 during overcurrent. Fault timing is set by an external capacitor on TMR, with distinct pull-up currents for OV (–2.2µA typ.) and OC (–10µA typ.) conditions.
Its ideal diode function uses DGATE to maintain ~30mV forward drop across M2, enabling reverse input protection and output holdup during input brownout or short. The device integrates UV/OV comparators (1.25V thresholds), 1mA HGATE pull-down for fast turn-off, and 130mA DGATE pull-down for reverse-current suppression - all operating from 4V–80V VCC with –40V reverse tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V VCC; withstands –40V reverse input without damage |
| Overvoltage Clamp Accuracy | ±2.4% (1.22V–1.28V FB reference) enables precise 27V output regulation during transients |
| Fault Timer Thresholds | TMR warning at 1.25V, turn-off at 1.35V, retry at 0.15V - supports configurable timing and auto-restart |
| Shutdown Current | 10µA max at 12V - enables low-power system sleep modes |
| Temperature Range | –40°C to +125°C ambient - qualified per AEC-Q100 Grade H for under-hood automotive use |
| Ideal Diode Forward Drop | 30mV typical (∆VSD) - reduces conduction loss vs. Schottky diodes and improves efficiency |
| Reverse Input Protection | Rated to –40V - prevents damage from battery reversal or jump-start faults |
Pinout & Package
Package: 14-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 15). RoHS-compliant, lead-free, thermally enhanced for high-power dissipation in automotive environments.
| 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 driver output | Drives second N-MOSFET (M2); maintains ~30mV forward drop and pulls low within 1.5µs to block reverse current |
| SOURCE (Pin 4) | Common source return | Anode node for ideal diode; reference for DGATE/HGATE clamping (clamped to 12V above SOURCE) |
| HGATE (Pin 5) | Surge stopper gate driver output | Controls main pass MOSFET (M1); regulated to clamp VOUT or limit current; 1mA pull-down ensures fast turn-off |
| VCC (Pin 6) | Positive supply input | Primary power rail (4V–80V); tolerates –40V reverse; supplies internal circuitry and charge pumps |
| SHDN (Pin 7) | Shutdown control input | Pulling <0.5V disables IC and reduces ICC to 10µA; open-circuit defaults to ~4V via internal clamp |
| UV (Pin 8) | Undervoltage comparator input | 1.25V threshold; holds HGATE/DGATE off during cold cranking; hysteresis ≥25mV prevents chatter |
| OV (Pin 9) | Overvoltage comparator input | 1.25V threshold; inhibits auto-retry during sustained overvoltage; must fall below threshold before restart |
| GND (Pin 10) | Device ground reference | Signal and power return; connects to PCB ground plane; exposed pad may be tied to GND for thermal relief |
| FLT (Pin 11) | Fault open-drain output | Pulls low at TMR = 1.25V (warning); sinks up to 2mA; rated to 80V - signals impending or active fault |
| ENOUT (Pin 12) | Enable output open-drain | High-impedance when VOUT > VCC − 0.7V; latched; resets only when VOUT < 2.2V - indicates MOSFET conduction state |
| TMR (Pin 13) | Fault timer capacitor connection | Charged by current sources proportional to VCC−VOUT; sets warning, turn-off, and cool-down timing intervals |
| FB (Pin 14) | Voltage regulator feedback input | 1.25V internal reference; connects to resistive divider from OUT to GND to set clamp voltage (e.g., 27V) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade H qualification | Validated for –40°C to +125°C operation in automotive under-hood applications with full reliability testing |
| Auto-retry fault recovery (LTC4364-2 variant) | After fault timeout, executes 32-cycle cool-down (0.15V ↔ 1.35V) then re-enables HGATE if OV pin is clear |
| Integrated dual gate drivers | HGATE (surge stopper) and DGATE (ideal diode) each provide 12V clamp above SOURCE, eliminating external level shifters |
| Adjustable overvoltage clamp | Set via FB resistive divider; achieves ±2.4% accuracy over temperature - enables precise 27V regulation during load dump |
| Reverse input protection to –40V | VCC pin withstands –40V without latch-up or damage - eliminates need for upstream TVS or polarity protection diodes |
| Low 10µA shutdown current | Enables always-on monitoring in battery-powered systems without excessive quiescent drain |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: 12V vehicle electrical system subjected to ISO 7637-2 Pulse 5a (120V/100ms) or load dump transients. IC Role / Device Role / Timing Role: LTC4364HDE-2#TRPBF acts as primary surge stopper, regulating VOUT at 27V while controlling external N-MOSFET M1 to absorb energy. Use Value: Prevents downstream ECU damage without sacrificing continuous operation - critical for ADAS, infotainment, and telematics modules. |
Use Scenario: Dual-battery or dual-PSU system where either source must power shared loads without backfeed. IC Role / Device Role / Timing Role: LTC4364HDE-2#TRPBF drives ideal diode MOSFET M2 to replace Schottky diodes, enabling ORing with <30mV forward drop. Use Value: Eliminates 0.3–0.5V diode losses, improves efficiency, reduces heat, and avoids thermal runaway in parallel supply paths. |
| Hot-Swap Power Insertion | Industrial Output Port Protection |
|
Use Scenario: Live insertion of powered modules into backplane or rack-mounted equipment with 24V/48V rails. IC Role / Device Role / Timing Role: LTC4364HDE-2#TRPBF monitors VCC for surges and controls M1 to limit inrush and clamp transients during plug-in. Use Value: Enables safe hot-swap without damaging connectors, PCB traces, or downstream ASICs - meets IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Industrial PLC or gateway with multiple field-connected ports requiring robust 24V DC input protection. IC Role / Device Role / Timing Role: LTC4364HDE-2#TRPBF provides coordinated overvoltage, overcurrent, and reverse-polarity protection on each port. Use Value: Single-chip solution replaces discrete TVS, fuse, and diode - reduces BOM count, PCB area, and validation effort. |
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 |
|---|---|---|---|
| LTC4365HDE-2#TRPBF | Wider 2.5V–80V VCC range; lower 2.5µA shutdown current; same pinout and feature set | Better suited for cold-cranking-sensitive systems (e.g., start-stop vehicles) due to 2.5V minimum VCC | Select when cold-crank operation below 4V is required; otherwise functionally interchangeable |
| TPS26631RHFR | Integrated 80V MOSFET; no external FET needed; fixed 28V OVP; lacks ideal diode controller | Single-chip solution for simpler overvoltage-only protection; no reverse-input or holdup capability | Choose when board space is constrained and ideal diode functionality is not needed |
Compared with LTC4364HDE-2#TRPBF, LTC4365HDE-2#TRPBF extends low-voltage operation but offers identical protection architecture, while TPS26631RHFR trades flexibility (external FETs, ideal diode) for integration - making it suitable only for basic clamp-only use cases.
Availability
LTC4364HDE-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, redundant supply ORing, hot-swap power insertion, industrial output port protection, and avionic surge suppression requiring stable component supply across extended temperature ranges.
Supply support for LTC4364HDE-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, serving industrial, automotive, communications, and healthcare markets.
The LTC4364HDE-2#TRPBF belongs to Analog Devices' Surge Stopper family, engineered specifically for high-reliability power path management in harsh environments - emphasizing transient immunity, wide temperature operation, and AEC-Q100 compliance.
FAQ
What is the key functional difference between LTC4364HDE-2#TRPBF and LTC4364HDE-1#TRPBF?
The LTC4364HDE-2#TRPBF implements auto-retry fault recovery: after overvoltage or overcurrent timeout, it executes a 32-cycle cool-down on the TMR pin and automatically re-enables HGATE if the OV pin voltage falls below threshold. In contrast, the LTC4364HDE-1#TRPBF latches HGATE off permanently until SHDN or UV is actively reset. This makes LTC4364HDE-2#TRPBF ideal for systems requiring autonomous recovery without microcontroller intervention.
Does LTC4364HDE-2#TRPBF require external MOSFETs, and what are the critical selection criteria?
Yes, LTC4364HDE-2#TRPBF requires two external N-channel MOSFETs: one for surge stopping (M1, driven by HGATE) and one for ideal diode function (M2, driven by DGATE). Critical criteria include RDS(ON) and SOA rating for M1 (to handle 200V/1ms transients), and low-threshold, low-Qg characteristics for M2 to achieve <30mV forward drop. Gate drive compatibility with 12V clamp above SOURCE is mandatory.
How does the TMR pin determine fault timing, and can it be adjusted for different transient durations?
The TMR pin uses an external capacitor to set fault timing: its voltage ramps up via current sources proportional to (VCC − VOUT). Overvoltage events charge TMR at –2.2µA (typ.), while overcurrent events charge at –10µA (typ.), enabling faster response to shorts. By selecting capacitor value (e.g., 6.8µF for 50ms OV timeout), designers tailor timing to match system SOA requirements - confirmed in Figure 1B of the datasheet.
Is LTC4364HDE-2#TRPBF compatible with reverse battery connections, and how is protection implemented?
Yes, LTC4364HDE-2#TRPBF withstands reverse input down to –40V on the VCC pin without damage, satisfying automotive reverse-polarity test requirements. Protection is implemented via internal clamping and isolation - when VCC goes negative, both HGATE and DGATE are pulled to the SOURCE pin voltage, turning off both external MOSFETs and blocking reverse current flow in either direction.
What is the role of the FB pin, and how is the output clamp voltage calculated?
The FB pin connects to a resistive divider between OUT and GND and serves as the feedback node for the overvoltage regulator. The LTC4364HDE-2#TRPBF maintains 1.25V at FB during clamping, so VOUT = 1.25V × (1 + R1/R2), where R1 is the upper resistor and R2 the lower. For a 27V clamp, use R1 = 383kΩ and R2 = 10kΩ (as shown in Typical Application Figure 1A), achieving ±2.4% accuracy over temperature.
LTC4364HDE-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)
LTC4364HDE-2#TRPBF FAQ
1.How can I place an order for LTC4364HDE-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364HDE-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 LTC4364HDE-2#TRPBF reliable?
The price and inventory of LTC4364HDE-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 LTC4364HDE-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4364HDE-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364HDE-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364HDE-2#TRPBF?
LTC4364HDE-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364HDE-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 LTC4364HDE-2#TRPBF?
For technical support, including LTC4364HDE-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364HDE-2#TRPBF requirements.
6.How does Aetrix verify that LTC4364HDE-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4364HDE-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 LTC4364HDE-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4364HDE-2#TRPBF?
All LTC4364HDE-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364HDE-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 LTC4364HDE-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4364HDE-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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