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Analog Devices Inc. LTC4364HMS-1#PBF
- Part No.:
- LTC4364HMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4364HMS-1#PBF.pdf
- Description:
- IC SURGE STOPPER W/DIODE 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:802
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Product details
Overview
LTC4364HMS-1#PBF 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 voltage at 27V during transients, provides adjustable overvoltage clamping via FB pin, and latches off the external N-channel MOSFET pass device upon fault timeout. Used in automotive power distribution modules requiring AEC-Q100 compliance and robust transient immunity.
For engineers reviewing the LTC4364HMS-1#PBF datasheet, LTC4364HMS-1#PBF pinout, LTC4364HMS-1#PBF application, or LTC4364HMS-1#PBF equivalent, this page delivers verified specifications, validated MSOP-16 pin functions, confirmed latch-off behavior (LTC4364-1 variant), real-world surge withstand capability (200V/1ms), and precise overcurrent threshold (50mV typical) - all critical for automotive-grade power path design and fault-tolerant system validation.
Technical Context
The LTC4364HMS-1#PBF implements dual-control architecture: a voltage amplifier regulates HGATE to clamp VOUT via external resistive divider (FB reference = 1.25V), while an active current limit circuit controls the same HGATE to maintain ∆VSNS = 50mV (or 25mV during output short). Fault timing is governed by TMR capacitor charging, with distinct pull-up currents for overvoltage (–2.2 µA typ.) and overcurrent (–210 µA typ.) conditions to accelerate shutdown under severe stress.
Its ideal diode function uses DGATE to regulate forward voltage across M2 to 30mV, minimizing conduction loss; reverse current detection triggers fast DGATE pull-down (130mA sink) to suppress transients during input collapse or brownout. UV and OV comparators (1.25V thresholds, 25–50mV hysteresis) independently disable HGATE/DGATE and inhibit auto-retry, ensuring deterministic response to supply anomalies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; withstands –40V reverse input and 200V/1ms surge - enables cold-crank operation and automotive load-dump resilience. |
| Overvoltage Clamp Accuracy | FB reference = 1.25V ±30mV over –40°C to 125°C - sets precise output regulation point (e.g., 27V) with external resistor divider. |
| Overcurrent Threshold | ∆VSNS = 50mV (typ.) at OUT > 2.5V; reduces to 25mV when OUT < 1.5V - protects MOSFET during sustained short with adaptive current limiting. |
| Fault Timer Behavior | LTC4364-1 latches HGATE OFF after TMR reaches 1.35V - prevents automatic recovery during persistent overvoltage, requiring manual reset via SHDN or UV. |
| Ideal Diode Regulation | Forward voltage regulated to 30mV across M2 source-drain - replaces Schottky diode, reducing power loss and enabling higher efficiency holdup during input shorts. |
| Shutdown Current | 10µA max at 12V (latched over full temp range) - supports ultra-low-power standby in always-on automotive subsystems. |
| AEC-Q100 Grade | H-grade: –40°C to +125°C ambient - qualified for under-hood automotive applications per AEC-Q100 Rev H. |
Pinout & Package
Package: 16-Lead Plastic MSOP (MS package), exposed pad optional, θJA = 120°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain voltage of HGATE-controlled MOSFET; enables ENOUT assertion when VOUT > VCC − 0.7V and triggers low-VOUT protection logic. |
| SENSE (Pin 2) | Current sense input | Connects to high-side of sense resistor; differential amplifier monitors ∆VSNS to enforce 50mV/25mV current limit thresholds. |
| DGATE (Pin 4) | Ideal diode gate drive output | Drives second N-MOSFET (M2) to regulate forward drop to 30mV; pulls down at 130mA to block reverse current during input failure. |
| SOURCE (Pin 5) | Common source return | Reference node for both HGATE and DGATE; connects to sources of back-to-back N-MOSFETs; defines ideal diode anode. |
| HGATE (Pin 6) | Surge stopper gate drive output | Controls main N-MOSFET (M1); regulated by voltage/current amplifiers to clamp VOUT or limit ILOAD during transients. |
| VCC (Pin 8) | Main supply input | Accepts 4V–80V; survives –40V reverse bias; powers internal circuitry and charge pumps for HGATE/DGATE drivers. |
| SHDN (Pin 9) | Shutdown control input | Pull ≤0.5V to reduce ICC to 10µA and latch HGATE/DGATE OFF; open or pulled ≥2.2V enables normal operation. |
| UV (Pin 10) | Undervoltage comparator input | Threshold = 1.25V; disables HGATE/DGATE when falling; for LTC4364-1, UV < 0.6V resets latched fault condition. |
| OV (Pin 11) | Overvoltage comparator input | Threshold = 1.25V; inhibits auto-retry when asserted; blocks initial turn-on if OV > threshold at power-up. |
| GND (Pin 12) | Device ground | Reference for all internal circuits except SENSE/OUT differential sensing; connects to PCB ground plane. |
| FLT (Pin 13) | Fault open-drain output | Pulls low when TMR ≥1.25V (warning) and stays low after HGATE latch-off; sinks up to 2mA, rated to 80V. |
| ENOUT (Pin 14) | Enable output | Open-drain signal goes high-impedance when VOUT > VCC − 0.7V; latched low until VOUT drops below 2.2V. |
| TMR (Pin 15) | Fault timer capacitor connection | Capacitor to GND sets warning (1.25V), shutdown (1.35V), and cool-down (0.15V ×32 cycles) timing; current scales with VCC−VOUT. |
| FB (Pin 16) | Voltage regulation feedback | Connects to resistive divider from OUT to GND; internal 1.25V reference enables programmable overvoltage clamp (e.g., 27V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated surge stopper + ideal diode controller | Single IC replaces discrete overvoltage clamp + Schottky ORing diode, reducing BOM count and PCB area in redundant power paths. |
| Latch-off fault response (LTC4364-1) | Eliminates uncontrolled auto-retry during persistent overvoltage - mandatory for safety-critical automotive systems where repeated fault cycling is prohibited. |
| Reverse input protection to –40V | Enables direct connection to battery terminals without external TVS or polarity protection, simplifying front-end design for 12V/24V vehicle architectures. |
| Adjustable output clamp via FB pin | Supports user-defined regulation points (e.g., 27V, 36V) using standard resistor values - avoids custom IC variants for different voltage rails. |
| Low 10µA shutdown current | Meets automotive "always-on" module requirements (e.g., telematics, alarm systems) with minimal battery drain during vehicle sleep mode. |
| AEC-Q100 qualified H-grade | Validated for –40°C to +125°C operation with full reliability testing - eliminates need for additional qualification effort in Tier 1 automotive designs. |
Applications
| Automotive Power Distribution | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment head units and ADAS ECUs from 12V battery line transients including ISO 7637-2 Pulse 5a (load dump up to 120V) and reverse battery connection. IC Role / Device Role / Timing Role: LTC4364HMS-1#PBF acts as primary surge suppression stage, regulating VOUT to 27V while latching off during sustained overvoltage to prevent MOSFET thermal runaway. Use Value: Enables use of cost-effective N-channel MOSFETs instead of expensive high-voltage P-channel devices, while meeting OEM EMC and reliability requirements without external clamps. |
Use Scenario: ORing two independent 24V DC supplies (e.g., main battery + backup generator) to feed mission-critical avionics sensors with zero reverse current flow. IC Role / Device Role / Timing Role: LTC4364HMS-1#PBF drives back-to-back N-MOSFETs as ideal diodes, providing <100ns reverse current blocking and <30mV forward drop during normal operation. Use Value: Eliminates 0.3–0.7V diode forward drop, increasing available voltage margin at load and reducing heat dissipation by >80% versus Schottky solutions. |
| Hot-Swap Server Backplane | Industrial PLC Power Input |
|
Use Scenario: Safely inserting live 48V power modules into telecom server racks without causing bus voltage sag or damaging upstream converters. IC Role / Device Role / Timing Role: LTC4364HMS-1#PBF controls inrush current via HGATE slew rate and enforces soft-start by limiting ∆VSNS during plug-in, preventing system-wide brownouts. Use Value: Replaces complex hot-swap controllers with integrated current limiting and overvoltage protection - reduces design cycle time and validation effort. |
Use Scenario: Protecting programmable logic controller (PLC) I/O modules from 24VDC field wiring faults including accidental 48V misconnection and induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: LTC4364HMS-1#PBF serves as front-end protector, clamping transients to safe levels and latching off during sustained overvoltage to avoid process interruption. Use Value: Provides deterministic fault response (no auto-retry) required for industrial safety standards (IEC 61508), eliminating risk of uncontrolled re-engagement during hazardous conditions. |
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 |
|---|---|---|---|
| LTC4364HMS-2#PBF | Auto-retry fault behavior (cools down and restarts after 32 TMR cycles) vs. latch-off; identical pinout, specs, and package. | Suitable for non-safety-critical systems requiring continuous uptime (e.g., data loggers), but violates latch requirement for automotive ASIL-B/C designs. | Select LTC4364HMS-2#PBF only if auto-recovery is explicitly permitted in your system safety plan; otherwise LTC4364HMS-1#PBF is mandatory. |
| TPS26631RHFR | Integrated 80V eFuse with fixed 28V overvoltage clamp; no ideal diode function; smaller 12-pin WQFN package; lower quiescent current (15µA). | Provides basic overvoltage/overcurrent protection but lacks reverse input protection and output holdup capability - requires external ideal diode for full functionality. | Choose TPS26631RHFR for space-constrained designs needing only eFuse protection; use LTC4364HMS-1#PBF when ideal diode, –40V reverse tolerance, and latch-off are required. |
Compared with LTC4364HMS-2#PBF, the LTC4364HMS-1#PBF ensures fail-safe shutdown in persistent faults, critical for automotive and industrial safety integrity levels; compared with TPS26631RHFR, it delivers complete front-end protection (surge + reverse + holdup) in one device, eliminating external components and layout complexity.
Availability
LTC4364HMS-1#PBF is available at Aetrix Electronics and suitable for automotive power distribution, redundant supply ORing, hot-swap server backplanes, and industrial PLC power inputs requiring stable component supply, AEC-Q100 compliance, and guaranteed long-term availability.
Supply support for LTC4364HMS-1#PBF 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 LTC4364HMS-1#PBF belongs to the Surge Stopper family, engineered specifically for high-reliability power path protection in harsh environments - emphasizing latch-off fault response, wide input range, and integrated ideal diode control for automotive and industrial applications.
FAQ
What is the key functional difference between LTC4364HMS-1#PBF and LTC4364HMS-2#PBF?
The LTC4364HMS-1#PBF latches off the HGATE pin permanently after a fault timeout, requiring manual reset via SHDN or UV pin; the LTC4364HMS-2#PBF automatically retries after a 32-cycle cool-down period. This makes LTC4364HMS-1#PBF suitable for safety-critical automotive applications where uncontrolled auto-restart is prohibited, while LTC4364HMS-2#PBF fits systems prioritizing continuous uptime. Both share identical pinout, electrical specs, and package.
How does LTC4364HMS-1#PBF achieve reverse input protection to –40V?
The LTC4364HMS-1#PBF withstands –40V on its VCC pin without damage due to internal protection circuitry, and its SOURCE pin serves as the ideal diode anode - when reverse battery is applied, the body diode of the external N-MOSFET blocks current, and the LTC4364HMS-1#PBF actively pulls DGATE low to ensure the MOSFET remains fully off. This eliminates need for external reverse-polarity protection diodes or TVS devices.
Can LTC4364HMS-1#PBF regulate output voltage to a value other than 27V?
Yes - the LTC4364HMS-1#PBF uses the FB pin with an external resistive divider to set the overvoltage clamp point. With the internal 1.25V reference, any output voltage can be programmed; for example, a 21.6kΩ/1kΩ divider sets VOUT = 27V, while a 28.8kΩ/1kΩ divider sets VOUT = 36V. The datasheet confirms FB accuracy of ±30mV over temperature, enabling precise, user-defined clamping.
What is the maximum surge voltage LTC4364HMS-1#PBF can withstand, and under what test condition?
The LTC4364HMS-1#PBF is specified to withstand a 200V, 1ms surge at VIN, as shown in the Typical Application diagram (Figure 1b) and confirmed in the FEATURES section. This rating applies with proper external MOSFET selection (e.g., FDB3682), appropriate HGATE capacitor (≥6.8nF), and correct PCB layout - not a standalone IC rating, but a validated system-level performance under defined test conditions.
Does LTC4364HMS-1#PBF require external components to implement ideal diode functionality?
Yes - the LTC4364HMS-1#PBF requires an external N-channel MOSFET (M2) connected between input and output, with its source tied to SOURCE and drain to SENSE/OUT nodes. DGATE drives the gate; no external gate resistor or Zener is needed for ≤24V systems, but a 15V Zener between DGATE and SOURCE is recommended for 24V+ supplies to prevent overvoltage stress on the MOSFET gate oxide. The IC handles all sensing, regulation, and fast turn-off autonomously.
LTC4364HMS-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC4364HMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364HMS-1#PBF 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#PBF reliable?
The price and inventory of LTC4364HMS-1#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364HMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364HMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364HMS-1#PBF?
LTC4364HMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364HMS-1#PBF 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#PBF?
For technical support, including LTC4364HMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364HMS-1#PBF requirements.
6.How does Aetrix verify that LTC4364HMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364HMS-1#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364HMS-1#PBF?
All LTC4364HMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364HMS-1#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC4364HMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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