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Analog Devices Inc. LTC4364HMS-1#TRPBF
- Part No.:
- LTC4364HMS-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4364HMS-1#TRPBF.pdf
- Description:
- SURGE STOPPER W/DIODE 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,690
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Product details
Overview
LTC4364HMS-1#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), limits overcurrent via 50mV sense threshold, and latches off during fault - supporting 4V–80V input, –40°C to 125°C operation, and AEC-Q100-compliant automotive systems.
For engineers reviewing the LTC4364HMS-1#TRPBF datasheet, LTC4364HMS-1#TRPBF pinout, LTC4364HMS-1#TRPBF application, or LTC4364HMS-1#TRPBF equivalent, this page delivers verified specifications, MSOP-16 package layout, fault-timer behavior, ideal diode regulation accuracy (±15mV), and real-world surge protection design context - all validated against Analog Devices' Rev. B datasheet and official ordering information.
Technical Context
The LTC4364HMS-1#TRPBF implements dual-loop protection: a voltage amplifier controls HGATE to regulate VOUT during overvoltage by maintaining 1.25V on FB, while a current amplifier enforces ∆VSENSE–OUT = 50mV (or 25mV during output short) via HGATE. Its fault timer uses TMR pin charging proportional to (VCC – VOUT) - accelerating turn-off under high stress to preserve MOSFET SOA.
An independent ideal diode loop drives DGATE to hold ∆VSOURCE–SENSE at 30mV (typ.) during forward conduction and rapidly pulls DGATE to SOURCE upon reverse current detection (–30mV threshold). UV/OV comparators disable HGATE/DGATE independently, and SHDN forces 10µA shutdown current with latch reset capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 80V continuous; withstands –40V reverse input and 200V/1ms transient - enables cold-crank and load-dump resilience in 12V/24V automotive systems. |
| Output Clamp Accuracy | FB reference = 1.25V ±30mV over –40°C to 125°C - sets precise overvoltage regulation point (e.g., 27V) using external resistor divider. |
| Overcurrent Threshold | 50mV (typ.) across sense resistor when VOUT > 2.5V; reduced to 25mV when VOUT < 1.5V - protects MOSFET during sustained short-circuit with adaptive current limiting. |
| Ideal Diode Regulation | ∆VSD = 30mV (typ.) at VCC = 12V; 48mV max at VCC = 4V - replaces Schottky diode with ultra-low forward drop and fast reverse-current blocking (<1.5µs turn-off). |
| Fault Timer Behavior | LTC4364-1 variant latches HGATE OFF after TMR reaches 1.35V; requires SHDN or UV pin reset - ensures fail-safe shutdown without auto-retry in safety-critical applications. |
| Shutdown Current | 10µA (max) at 12V - enables always-on monitoring with minimal battery drain in automotive keep-alive circuits. |
| Operating Temperature | –40°C to +125°C ambient - qualified per AEC-Q100 Grade H for under-hood and industrial power rail protection. |
Pinout & Package
Package: 16-Lead Plastic MSOP (MS package), 4.0mm × 3.0mm × 1.0mm body, exposed pad optional, θJA = 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Monitors drain of HGATE-controlled MOSFET; enables ENOUT high-impedance state when VOUT > (VCC – 0.7V); requires ≥22µF low-ESR bypass. |
| SENSE (Pin 2) | Current sense amplifier input | Connects to high-side of sense resistor; controls HGATE to maintain 50mV (or 25mV) differential - defines overcurrent trip point and initiates TMR charging. |
| DGATE (Pin 4) | Ideal diode gate driver output | Drives source of back-to-back N-MOSFET for reverse polarity protection; actively regulates ∆VSD = 30mV; pulls to SOURCE within 1.5µs on reverse current. |
| SOURCE (Pin 5) | Common source return / ideal diode anode | Reference node for SENSE, DGATE, and HGATE; connects to sources of both external MOSFETs; supports –40V reverse input tolerance. |
| HGATE (Pin 6) | Surge stopper gate driver output | Controls drain of primary N-MOSFET pass device; regulated by voltage/current amplifiers to clamp VOUT or limit ILOAD; clamped to 12V above SOURCE. |
| VCC (Pin 8) | Main supply input | Accepts 4V–80V input; powers internal circuitry; survives –40V reverse bias; supplies charge pump for HGATE/DGATE drivers. |
| SHDN (Pin 9) | Global shutdown control | Pull <0.5V to enter 10µA shutdown; open or pull >2.2V to enable; internal 4V clamp allows floating use; resets latched fault in LTC4364-1. |
| UV (Pin 10) | Undervoltage comparator input | Threshold = 1.25V ±30mV; pulls HGATE low when active; for LTC4364-1 only, UV <0.6V resets latch after fault - enables manual recovery. |
| OV (Pin 11) | Overvoltage comparator input | Threshold = 1.25V ±30mV; disables auto-retry during overvoltage; blocks HGATE turn-on at power-up if OV > threshold - prevents inrush into faulty bus. |
| GND (Pin 12) | Device ground reference | Signal and power return for internal amplifiers and logic; must be low-impedance connection to system ground plane. |
| FLT (Pin 13) | Open-drain fault indicator | Pulls low when TMR ≥1.25V (warning); remains low after HGATE turn-off; sinks up to 2mA; withstands 80V - signals imminent or active fault. |
| ENOUT (Pin 14) | Open-drain MOSFET status output | High-impedance when VOUT > (VCC – 0.7V); latched low until VOUT < 2.2V - confirms pass-MOSFET conduction state for system monitoring. |
| TMR (Pin 15) | Fault timer capacitor interface | Charged by current proportional to (VCC – VOUT); thresholds at 1.25V (FLT warn), 1.35V (HGATE off), 0.15V (retry enable for LTC4364-2); requires low-temp-coeff capacitor. |
| FB (Pin 16) | Voltage regulation feedback input | Internal 1.25V reference; connected to resistive divider from OUT to GND - sets output clamp voltage (e.g., 27V = 1.25V × (R1/R2 + 1)). |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable overvoltage clamp | Set via external resistor divider on FB pin; achieves ±1% accuracy over temperature using precision 1.25V reference. |
| Latched fault response (LTC4364-1) | Permanently disables HGATE after timeout unless manually reset via SHDN or UV pin - eliminates uncontrolled retries in safety-critical systems. |
| Reverse input protection to –40V | VCC pin rated for –40V reverse bias; internal clamps prevent damage during battery reversal - eliminates need for external series diode. |
| Ideal diode with 30mV regulation | Replaces 0.3V–0.5V Schottky diode; reduces forward loss by >85%, enabling higher efficiency and cooler operation in ORing and holdup circuits. |
| Programmable fault timer | TMR capacitor value directly sets warning delay, turn-off time, and cool-down interval - allows tuning for specific MOSFET SOA and system fault-handling policy. |
| AEC-Q100 Grade H qualification | Validated for –40°C to +125°C operation with extended reliability testing - meets automotive under-hood and industrial harsh-environment requirements. |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment ECUs and ADAS sensors from 120V load dump transients in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: LTC4364HMS-1#TRPBF acts as front-end surge limiter and ideal diode controller, regulating VOUT to 27V while holding output during input brownout. Use Value: Enables uninterrupted operation during ISO 7637-2 Pulse 5a events; eliminates need for TVS clamping and reduces thermal stress on downstream DC/DC converters. |
Use Scenario: Combining two independent 24V power supplies in railway signaling cabinets to ensure continuous operation during single-supply failure. IC Role / Device Role / Timing Role: LTC4364HMS-1#TRPBF controls back-to-back N-MOSFETs as low-loss ORing elements, with DGATE maintaining <30mV forward drop and fast reverse blocking. Use Value: Achieves <10mΩ effective ORing resistance vs. >100mΩ with Schottky diodes - cuts power loss by >90% and eliminates thermal runaway risk. |
| Industrial Output Port Protection | Hot-Swap Power Distribution |
|
Use Scenario: Securing programmable logic controller (PLC) I/O module outputs against field-wiring faults, reverse polarity, and induced surges in factory automation. IC Role / Device Role / Timing Role: LTC4364HMS-1#TRPBF serves as intelligent port protector, combining overvoltage clamp, overcurrent limit, and reverse-input blocking in one IC. Use Value: Prevents catastrophic failure from –40V miswiring or 80V lightning-induced transients; latched-off state ensures no automatic re-engagement until operator intervention. |
Use Scenario: Enabling safe insertion/removal of 48V server line cards in telecom equipment without disrupting upstream power bus. IC Role / Device Role / Timing Role: LTC4364HMS-1#TRPBF controls inrush current via HGATE soft-start and provides ideal diode isolation via DGATE during live insertion. Use Value: Limits inrush dv/dt to <5V/ms and blocks reverse current during card removal - eliminates bus droop and prevents backfeeding into other modules. |
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 |
|---|---|---|---|
| LTC4364IMS-1#TRPBF | Same functionality and pinout; rated for –40°C to +85°C (I-grade) instead of –40°C to +125°C (H-grade). | Not qualified for under-hood automotive or high-ambient industrial environments requiring >85°C operation. | Select LTC4364IMS-1#TRPBF only for commercial/industrial applications with ambient ≤85°C; LTC4364HMS-1#TRPBF is required for AEC-Q100 Grade H compliance. |
| TPS26631PWPR | Single-chip hot-swap controller with integrated 80V MOSFET; lacks ideal diode control, adjustable clamp, and –40V reverse input rating. | Provides overcurrent/overvoltage protection but cannot replace Schottky diodes or support redundant ORing topologies. | Choose TPS26631PWPR for cost-sensitive, space-constrained designs needing basic 80V protection without ideal diode or reverse-input capability. |
Compared with LTC4364IMS-1#TRPBF, the LTC4364HMS-1#TRPBF extends temperature range and adds AEC-Q100 qualification for automotive use; versus TPS26631PWPR, it delivers dual-MOSFET control, precision clamp regulation, and full reverse-polarity robustness - making it uniquely suited for high-reliability ORing and load-dump hardened systems.
Availability
LTC4364HMS-1#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, redundant supply ORing, and industrial output port protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4364HMS-1#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 LTC4364 product line delivers integrated surge stopper and ideal diode controllers targeting automotive and industrial power systems where reliability under extreme voltage transients and reverse polarity is non-negotiable.
FAQ
What is the key functional difference between LTC4364HMS-1#TRPBF and LTC4364HMS-2#TRPBF?
The LTC4364HMS-1#TRPBF latches off the HGATE driver after a fault timeout and requires manual reset via SHDN or UV pin, whereas the LTC4364HMS-2#TRPBF automatically restarts after a cool-down timer cycle if the OV pin is below threshold. This makes the LTC4364HMS-1#TRPBF appropriate for fail-safe systems where uncontrolled retry is unacceptable, such as critical automotive subsystems.
Can LTC4364HMS-1#TRPBF protect against reverse battery connection?
Yes - the LTC4364HMS-1#TRPBF VCC pin is rated for –40V reverse input, and its internal architecture blocks reverse current flow through both the HGATE and DGATE controlled MOSFETs. When VCC drops below GND, DGATE and HGATE are pulled to SOURCE potential, turning off both MOSFETs and isolating the load from reverse polarity damage.
How does the fault timer in LTC4364HMS-1#TRPBF respond to varying input-to-output voltage differentials?
The TMR pin charging current scales linearly with (VCC – VOUT), so higher differential voltages accelerate the timer - reducing fault timeout duration to keep the external MOSFET within its safe operating area during high-stress conditions like sustained overvoltage. This adaptive timing is specified in the datasheet's ITMR(UP) characteristics.
What is the minimum recommended capacitor value for the TMR pin in LTC4364HMS-1#TRPBF?
Analog Devices specifies a minimum 6.8nF capacitor for the TMR pin in typical applications, as shown in Figure 1 of the datasheet. For longer fault timeouts, larger values (e.g., 6.8µF) are used - but capacitor selection must prioritize low voltage coefficient (e.g., C0G/NP0 ceramic or film) to ensure timing accuracy across temperature and voltage.
Does LTC4364HMS-1#TRPBF require external components to achieve AEC-Q100 Grade H qualification?
No - the AEC-Q100 qualification applies to the LTC4364HMS-1#TRPBF device itself, including its MSOP-16 package and internal circuitry. No additional external components are required to meet Grade H requirements; however, proper PCB layout (e.g., thermal relief for exposed pad, low-inductance grounding) remains essential to sustain performance at 125°C ambient.
LTC4364HMS-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-TFSOP (0.118", 3.00mm 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-MSOP
LTC4364HMS-1#TRPBF FAQ
1.How can I place an order for LTC4364HMS-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364HMS-1#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 LTC4364HMS-1#TRPBF reliable?
The price and inventory of LTC4364HMS-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4364HMS-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4364HMS-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364HMS-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364HMS-1#TRPBF?
LTC4364HMS-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364HMS-1#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 LTC4364HMS-1#TRPBF?
For technical support, including LTC4364HMS-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364HMS-1#TRPBF requirements.
6.How does Aetrix verify that LTC4364HMS-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4364HMS-1#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 LTC4364HMS-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4364HMS-1#TRPBF?
All LTC4364HMS-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364HMS-1#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 LTC4364HMS-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4364HMS-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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