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Analog Devices Inc. LTC4364HS-2#TRPBF
- Part No.:
- LTC4364HS-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC4364HS-2#TRPBF.pdf
- Description:
- SURGE STOPPER W/DIODE SMD
- Quantity:
- Payment:
- Shipping:
Inventory:1,779
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Product details
Overview
LTC4364HS-2#TRPBF from Analog Devices is a high-voltage surge stopper with integrated ideal diode controller, designed to protect downstream loads from automotive load dump (up to 200V/1ms), reverse input (–40V), and output short events. It regulates output at adjustable clamp voltage (e.g., 27V), delivers 4A at 12V, and features auto-retry fault recovery with 0.1% duty cycle. Used in automotive power rail protection where continuous operation during transients is critical.
For engineers reviewing the LTC4364HS-2#TRPBF datasheet, LTC4364HS-2#TRPBF pinout, LTC4364HS-2#TRPBF application, or LTC4364HS-2#TRPBF equivalent, key selection criteria include its –40°C to 125°C operating range, 16-lead SO package, AEC-Q100 qualification, 4V–80V input range, and distinct LTC4364-2 auto-restart behavior versus LTC4364-1 latch-off.
Technical Context
The LTC4364HS-2#TRPBF implements dual-loop control: a voltage amplifier regulates HGATE to maintain 1.25V at FB during overvoltage, while a current amplifier limits ∆VSNS to 50mV (or 25mV during output short) by modulating HGATE. Its TMR pin integrates fault timing with voltage-dependent charging-overcurrent pull-up current is 5× that of overvoltage-to enforce MOSFET safe operating area.
Its ideal diode function uses DGATE to actively regulate forward VSD to ~30mV via charge-pump drive and fast 130mA pull-down for reverse-current suppression. The device supports reverse input protection to –40V and reverse output protection to –20V, with shutdown current as low as 10µA at 12V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 80V - operates through cold-crank (4V) and withstands surges >80V via VCC clamp |
| Overvoltage Clamp Accuracy | ±2.4% (1.22V–1.28V FB reference) - sets precise output regulation point via external resistor divider |
| Fault Timer Thresholds | 1.25V (FLT warning), 1.35V (HGATE turn-off), 0.15V (retry restart) - enables timed, voltage-scaled fault response |
| Ideal Diode Forward Drop | 30mV typical (at ∆VDGATE = 2.5V, VCC = 12V) - replaces Schottky with lower loss and no reverse recovery |
| Shutdown Current | 10µA max at 12V - enables ultra-low-power disable for battery-sensitive systems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 |
| Package | 16-lead plastic SO - industry-standard footprint with θJA = 100°C/W for thermal management |
Pinout & Package
Package: 16-lead plastic SO (Small Outline), exposed pad not applicable, θJA = 100°C/W, rated for –40°C to +125°C ambient.
| 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 ∆VSENSE–OUT to 50mV (or 25mV during short) |
| DGATE (Pin 4) | Ideal diode gate driver output | Drives second N-MOSFET anode-side; regulates forward VSD to ~30mV and pulls down at –30mV reverse to block current |
| SOURCE (Pin 5) | Common source return | Reference node for both HGATE and DGATE drives; connects to sources of back-to-back N-MOSFETs |
| HGATE (Pin 6) | Surge stopper gate driver output | Controls main N-MOSFET pass device; regulated by voltage/current amplifiers for OV/OC protection |
| VCC (Pin 8) | Main supply input | Accepts 4V–80V; survives –40V reverse battery; 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 for normal operation; clamped to 4V when floating |
| UV (Pin 10) | Undervoltage comparator input | 1.25V threshold with 25–80mV hysteresis; holds HGATE/DGATE off during brownout; resets latch only on LTC4364-1 |
| OV (Pin 11) | Overvoltage comparator input | 1.25V threshold; disables auto-retry during overvoltage; blocks initial turn-on if asserted at power-up |
| GND (Pin 12) | Device ground reference | Signal and power return for internal circuitry; separate from SOURCE for accurate sensing |
| FLT (Pin 13) | Fault open-drain output | Pulls low at TMR = 1.25V (warning); sinks up to 2mA; withstands 80V; indicates imminent HGATE turn-off |
| ENOUT (Pin 14) | Enable output open-drain | High-impedance when VOUT > VCC–0.7V (MOSFET fully on); latched; resets at VOUT < 2.2V |
| TMR (Pin 15) | Fault timer capacitor connection | Charged by voltage- or current-dependent current sources; sets warning, turn-off, and cool-down timing |
| FB (Pin 16) | Voltage regulator feedback input | 1.25V internal reference; connected to resistive divider from OUT to GND to set clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery (LTC4364-2) | 0.1% retry duty cycle after fault timeout - enables automatic re-engagement without manual reset |
| Reverse input protection | Withstands –40V at VCC - eliminates need for external blocking diode in reverse-battery scenarios |
| Adjustable overvoltage clamp | Set via FB resistor divider - allows precise output regulation (e.g., 27V) independent of input surge level |
| Ideal diode holdup | 30mV forward drop regulation - reduces conduction loss vs. Schottky and suppresses reverse current transients |
| AEC-Q100 qualification | Grade H (–40°C to +125°C) - validated for automotive under-hood deployment with full reliability testing |
| Low shutdown current | 10µA maximum at 12V - extends battery life in always-on vehicle modules during sleep mode |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment ECUs during 12V system load dump events (92V/1ms transient). IC Role / Device Role / Timing Role: Surge stopper regulating output at 27V while ideal diode maintains holdup during input collapse. Use Value: Prevents ECU brownout or damage without interrupting operation; eliminates need for TVS clamping at load. |
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: Ideal diode controller enabling low-loss, bidirectional reverse-blocking path with <1µs turn-off. Use Value: Replaces discrete Schottky diodes, reducing heat and voltage drop; supports hot-swap capability. |
| Hot-Swap Power Insertion | Industrial 24V Rail Protection |
|
Use Scenario: Safely inserting powered boards into live 24V backplanes without causing bus disturbance or arcing. IC Role / Device Role / Timing Role: Current-limited soft-start via SENSE-based overcurrent control and timed HGATE ramp. Use Value: Limits inrush current to <1A during insertion; prevents upstream supply sag or fault propagation. |
Use Scenario: Securing PLC I/O modules against field-wiring faults, including reverse polarity and accidental shorts. IC Role / Device Role / Timing Role: Dual protection: UV lockout below 4V, reverse input blocking to –40V, and output short limiting. Use Value: Eliminates fuse replacement and downtime; sustains operation during brief wiring errors. |
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 |
|---|---|---|---|
| LTC4365HS-2#TRPBF | Wider 2.5V–100V input range; higher 100V absolute max VCC rating; identical pinout and auto-retry logic | Supports 48V telecom and industrial rails beyond automotive 12V/24V; same SO-16 package | Select when input may exceed 80V or require extended voltage margin; otherwise pin-compatible upgrade |
| TPS26631RHFR | Integrated 60V MOSFET; fixed 28V overvoltage clamp; no ideal diode function; 1.2ms fault response | Lacks reverse-input protection and output holdup; suited for simpler overvoltage-only use cases | Choose for cost-sensitive designs where discrete MOSFETs are undesirable and ideal diode not required |
Compared with LTC4364HS-2#TRPBF, LTC4365HS-2#TRPBF extends voltage range without changing layout, while TPS26631RHFR trades integration and simplicity for loss of ideal diode functionality and design flexibility.
Availability
LTC4364HS-2#TRPBF is available at Aetrix Electronics and suitable for automotive power distribution, industrial 24V systems, and redundant supply ORing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4364HS-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 precision instrumentation, industrial automation, and automotive markets.
The LTC4364 product line delivers robust front-end protection for high-reliability power systems, combining surge suppression, ideal diode control, and fault management in a single IC for automotive and harsh-environment applications.
FAQ
What is the key functional difference between LTC4364HS-2#TRPBF and LTC4364HS-1#TRPBF?
The LTC4364HS-2#TRPBF implements auto-retry fault recovery: after overvoltage or overcurrent timeout, it cycles TMR 32 times and automatically restarts HGATE if OV is deasserted. In contrast, LTC4364HS-1#TRPBF latches HGATE off permanently until SHDN or UV (on -1) is pulsed. This makes LTC4364HS-2#TRPBF ideal for unattended systems requiring autonomous recovery.
Can LTC4364HS-2#TRPBF be used with 48V input systems?
Yes - the LTC4364HS-2#TRPBF supports 4V to 80V input range and withstands transients beyond 80V via internal VCC clamping. For sustained 48V operation, ensure external MOSFETs (M1/M2) are rated ≥60V VDS, and verify TMR capacitor derating at elevated temperature. The 16-lead SO package provides adequate thermal margin at 48V/4A.
How does the ideal diode function of LTC4364HS-2#TRPBF improve system efficiency?
The LTC4364HS-2#TRPBF regulates forward VSD to ~30mV using active DGATE control, replacing a typical 0.3V–0.5V Schottky diode. At 4A, this reduces conduction loss from ~1.6W to ~0.12W - cutting heat generation by >90% and eliminating reverse recovery losses during input collapse, directly improving power budget and thermal design.
What is the purpose of the TMR pin on LTC4364HS-2#TRPBF, and how is timing set?
The TMR pin on LTC4364HS-2#TRPBF connects to an external capacitor that sets three timing intervals: fault warning (TMR = 1.25V), HGATE turn-off (TMR = 1.35V), and auto-retry cool-down (32 cycles between 0.15V and 1.35V). Charging current scales with VCC–VOUT, ensuring shorter timeouts during high-dissipation conditions to protect the external MOSFET's safe operating area.
Is LTC4364HS-2#TRPBF AEC-Q100 qualified, and what grade does it meet?
Yes - LTC4364HS-2#TRPBF is AEC-Q100 qualified for automotive applications and meets Grade H specifications: operating temperature range of –40°C to +125°C, with full reliability testing including HTOL, TC, and UHAST. The "H" suffix in the part number explicitly denotes this qualification level, making it suitable for under-hood deployment.
LTC4364HS-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
LTC4364HS-2#TRPBF FAQ
1.How can I place an order for LTC4364HS-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364HS-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 LTC4364HS-2#TRPBF reliable?
The price and inventory of LTC4364HS-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 LTC4364HS-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4364HS-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364HS-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364HS-2#TRPBF?
LTC4364HS-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364HS-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 LTC4364HS-2#TRPBF?
For technical support, including LTC4364HS-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364HS-2#TRPBF requirements.
6.How does Aetrix verify that LTC4364HS-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4364HS-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 LTC4364HS-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4364HS-2#TRPBF?
All LTC4364HS-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364HS-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 LTC4364HS-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4364HS-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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