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Analog Devices Inc. LTC4364HS-2#PBF
- Part No.:
- LTC4364HS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC4364HS-2#PBF.pdf
- Description:
- IC SURGE STOPPER W/DIODE SMD
- Quantity:
- Payment:
- Shipping:
Inventory:570
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Product details
Overview
LTC4364HS-2#PBF 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 is used in automotive power distribution systems to maintain load operation during load dump events.
For engineers reviewing the LTC4364HS-2#PBF datasheet, LTC4364HS-2#PBF pinout, LTC4364HS-2#PBF application, or LTC4364HS-2#PBF equivalent, key selection criteria include its –40°C to 125°C operating range, 16-lead SO package, AEC-Q100 qualification, adjustable 27V output clamp, and automatic restart behavior distinguishing it from latch-off variants like LTC4364HS-1#PBF.
Technical Context
The LTC4364HS-2#PBF integrates dual gate drivers: HGATE controls an external N-channel MOSFET for overvoltage-regulated pass-through (clamping VOUT via FB feedback loop), while DGATE drives a second N-channel MOSFET for ideal diode operation with 30mV forward voltage regulation and fast reverse-current shutdown. Its fault timer uses a single external capacitor to set warning (1.25V), turn-off (1.35V), and cool-down (0.15V × 32 cycles) thresholds.
It implements independent UV (1.25V threshold, 25–80mV hysteresis) and OV (1.25V threshold, 12mV hysteresis) comparators that disable auto-retry during overvoltage and hold HGATE/DGATE off during undervoltage. The device draws only 10μA in shutdown and supports input voltages from 4V to 80V, with survival capability up to –40V reverse and 100V absolute max on VCC/SOURCE pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V supply; survives –40V reverse input and 100V absolute max on critical pins |
| Output Clamp Voltage | Adjustable via FB divider; typical 27V clamping during 92V transient per Figure 1 |
| Fault Recovery Mode | Auto-restart after cool-down timer (32×0.15V cycles); 0.1% retry duty cycle during overvoltage |
| Reverse Input Protection | –40V rated; DGATE actively shuts off ideal diode MOSFET when reverse voltage exceeds –30mV |
| Shutdown Current | 10μA at 12V - enables low-power battery monitoring during vehicle off-state |
| Package & Temp Grade | 16-lead plastic SO; qualified for –40°C to +125°C ambient (H-grade) |
| AEC-Q100 Qualification | Qualified for automotive applications - supports functional safety-critical power rail protection |
Pinout & Package
Package: 16-Lead Plastic SO (Small Outline), exposed pad not applicable, θJA = 100°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain of HGATE-controlled MOSFET; enables ENOUT high-impedance state when VCC − VOUT < 0.7V |
| SENSE (Pin 2) | Current sense amplifier input | Monitors voltage across external sense resistor; triggers overcurrent limit at 45–55mV (50mV typ) above OUT |
| DGATE (Pin 4) | Ideal diode gate driver output | Drives second N-MOSFET; regulates forward drop to ~30mV; pulls low within 1.5μs on reverse current detection |
| SOURCE (Pin 5) | Common source reference | Return node for both MOSFET sources; defines anode of ideal diode and reference for SENSE/OUT differential |
| HGATE (Pin 6) | Surge stopper gate driver output | Controls primary N-MOSFET pass device; regulates VOUT via FB loop; pulls down with 1mA during fault |
| VCC (Pin 8) | Main supply input | Accepts 4–80V; survives –40V reverse; powers internal circuitry and charge pumps for HGATE/DGATE |
| SHDN (Pin 9) | Shutdown control input | Pull <0.5V to enter 10μA shutdown; open or pull >2.2V to enable; clamped to 4V when floating |
| UV (Pin 10) | Undervoltage comparator input | 1.25V threshold; disables HGATE/DGATE if below; 0.6V reset threshold only for LTC4364-1 variant |
| OV (Pin 11) | Overvoltage comparator input | 1.25V threshold; inhibits auto-retry during overvoltage; must fall below threshold before HGATE restarts |
| GND (Pin 12) | Device ground reference | Analog/digital ground return; connects to PCB ground plane; no internal connection to exposed pad (SO package) |
| FLT (Pin 13) | Fault open-drain output | Pulls low at TMR = 1.25V (warning); remains low until fault clears and cool-down completes (LTC4364-2) |
| ENOUT (Pin 14) | Enable output indicator | High-impedance when VOUT > VCC − 0.7V; latched; resets when VOUT < 2.2V; requires pull-up to OUT |
| TMR (Pin 15) | Fault timer capacitor node | Charged by current proportional to VCC−VOUT; sets warning (1.25V), turn-off (1.35V), and cool-down timing |
| FB (Pin 16) | Feedback input for output clamp | 1.25V internal reference; sets regulated VOUT via resistive divider; connect to GND to disable clamp |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables uninterrupted system operation after transient overvoltage; avoids manual reset or power cycle |
| Integrated ideal diode control | Replaces Schottky with N-MOSFET; reduces forward drop to ~30mV and eliminates reverse leakage |
| Adjustable output voltage clamp | Configurable via FB divider (e.g., 27V in typical app); maintains stable load voltage during 92V/1ms surges |
| AEC-Q100 qualified H-grade | Rated for –40°C to +125°C ambient; validated for automotive under-hood and power-distribution use cases |
| Reverse input protection to –40V | Prevents damage from battery reversal; DGATE forces ideal diode MOSFET off before body diode conduction |
| Low 10μA shutdown current | Minimizes parasitic drain on vehicle battery during ignition-off; supports always-on monitoring circuits |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: Protecting infotainment ECUs during 12V battery load dump events (up to 92V/1ms). IC Role / Device Role / Timing Role: Surge stopper regulating VOUT at 27V while controlling external N-MOSFET; ideal diode prevents backfeed from backup supply. Use Value: Maintains uninterrupted operation without brownout; eliminates need for bulky TVS diodes or Zener clamps. |
Use Scenario: Combining two independent 12V supplies (e.g., main battery + auxiliary) into one load rail. IC Role / Device Role / Timing Role: Dual-MOSFET controller providing forward conduction and reverse blocking; DGATE ensures zero reverse current during switchover. Use Value: Enables seamless hot-swap between sources; reduces power loss vs. discrete diode ORing by >80%. |
| Hot-Swap Power Insertion | Industrial 24V/48V System Protection |
|
Use Scenario: Safely inserting powered modules into live backplanes without causing bus glitches or arcing. IC Role / Device Role / Timing Role: Controls inrush via HGATE slew rate; limits peak current using SENSE-based overcurrent protection. Use Value: Prevents voltage droop on shared rail; eliminates need for mechanical interlocks or complex soft-start ICs. |
Use Scenario: Protecting PLC I/O modules connected to 24V/48V field wiring subject to lightning-induced surges. IC Role / Device Role / Timing Role: Withstands 200V/1ms transients per spec; clamps output to safe level while sustaining 4A load current. Use Value: Replaces multi-stage protection (TVS + fuse + LDO); simplifies BOM and improves MTBF. |
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#PBF | Wider 2.5V–40V operating range; integrated 100V MOSFET drivers; higher 100V absolute max rating | Supports lower-voltage systems (e.g., 3.3V/5V logic rails); better suited for mixed-voltage industrial designs | Select LTC4365HS-2#PBF when input voltage may dip below 4V or exceed 80V; retains same SO package and auto-retry behavior |
| TPS26631RHFR | Single-chip solution with integrated 80V MOSFETs; fixed 28V overvoltage clamp; no external FB divider needed | Lacks ideal diode reverse holdup; no reverse input protection beyond –0.3V; not AEC-Q100 qualified | Choose TPS26631RHFR for cost-sensitive, non-automotive 12V systems where board space is constrained and reverse polarity is not a concern |
Compared with LTC4364HS-2#PBF, LTC4365HS-2#PBF extends low-end input support and ruggedness, while TPS26631RHFR trades flexibility and reverse protection for integration and simplicity - making LTC4364HS-2#PBF optimal for AEC-Q100-compliant, dual-MOSFET automotive surge suppression with holdup capability.
Availability
LTC4364HS-2#PBF is available at Aetrix Electronics and suitable for automotive ECU protection, redundant power ORing, and industrial 24V/48V system protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4364HS-2#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 LTC4364 product line was designed specifically for robust front-end power protection in automotive and harsh-environment systems - combining surge suppression, ideal diode control, and precise fault management in a single controller IC.
FAQ
What is the key functional difference between LTC4364HS-2#PBF and LTC4364HS-1#PBF?
The LTC4364HS-2#PBF implements automatic restart after fault cool-down (32-cycle 0.15V timer), whereas LTC4364HS-1#PBF latches off permanently until SHDN or UV is cycled. This makes LTC4364HS-2#PBF suitable for systems requiring autonomous recovery from transient overvoltage events without host intervention.
Can LTC4364HS-2#PBF be used with a single external MOSFET instead of two?
Yes - LTC4364HS-2#PBF supports single-MOSFET configurations. Leave DGATE unconnected or tied to SOURCE to disable ideal diode functionality, retaining only surge stopper operation via HGATE. The SENSE/OUT current sensing and FB-regulated clamping remain fully functional.
What is the maximum transient voltage LTC4364HS-2#PBF can survive on the VCC pin?
LTC4364HS-2#PBF has an absolute maximum VCC rating of 100V and is specified to withstand 200V/1ms transients per datasheet Figure 1. Its internal clamps and robust gate drivers ensure reliable operation during automotive load dump events without external TVS devices.
How does the TMR capacitor value affect fault timing in LTC4364HS-2#PBF?
The TMR capacitor (CTMR) sets three timing intervals: warning delay (TMR = 1.25V), turn-off delay (TMR = 1.35V), and cool-down period (32 cycles between 0.15V and 1.35V). Charging current scales with VCC − VOUT, so CTMR value directly determines timeout duration - e.g., 6.8µF yields ~50ms warning-to-turnoff at 92V input.
Is LTC4364HS-2#PBF pin-compatible with other LTC4364 variants in the SO package?
Yes - all LTC4364xS-x#PBF variants (e.g., LTC4364CS-2#PBF, LTC4364IS-2#PBF, LTC4364HS-2#PBF) share identical 16-lead SO pinouts and electrical interfaces. Only temperature grade and marking differ; no PCB layout changes are required when upgrading from commercial (C) or industrial (I) to automotive H-grade.
LTC4364HS-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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-SO
LTC4364HS-2#PBF FAQ
1.How can I place an order for LTC4364HS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364HS-2#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 LTC4364HS-2#PBF reliable?
The price and inventory of LTC4364HS-2#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364HS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364HS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364HS-2#PBF?
LTC4364HS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364HS-2#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 LTC4364HS-2#PBF?
For technical support, including LTC4364HS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364HS-2#PBF requirements.
6.How does Aetrix verify that LTC4364HS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364HS-2#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 LTC4364HS-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364HS-2#PBF?
All LTC4364HS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364HS-2#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 LTC4364HS-2#PBF part is unused and in its original packaging.
Return procedure for LTC4364HS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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