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Analog Devices Inc. LTC4365HTS8#WTRPBF
- Part No.:
- LTC4365HTS8#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365HTS8#WTRPBF.pdf
- Description:
- OVERVOLTAGE, UNDERVOLTAGE & REVE
- Quantity:
- Payment:
- Shipping:
Inventory:950
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Product details
Overview
LTC4365HTS8#WTRPBF from Analog Devices is an automotive-grade overvoltage, undervoltage, and reverse supply protection controller for 12V systems. It operates from 2.5V to 34V input, withstands –40V to 60V fault conditions, delivers up to 9.8V gate enhancement to external N-channel MOSFETs, consumes only 125µA quiescent current, and is qualified per AEC-Q100 Grade H (–40°C to 125°C) for under-hood automotive surge protection.
For engineers reviewing the LTC4365HTS8#WTRPBF datasheet, LTC4365HTS8#WTRPBF pinout, LTC4365HTS8#WTRPBF application, or LTC4365HTS8#WTRPBF equivalent, key selection criteria include its TSOT-23 package, 36ms recovery delay (standard version), adjustable UV/OV thresholds via resistive dividers, reverse polarity blocking down to –40V, and compatibility with dual N-channel MOSFETs such as Si9945 or Si4214.
Technical Context
The LTC4365HTS8#WTRPBF implements dual precision comparators (0.5V threshold ±25mV hysteresis) for independent UV and OV monitoring, with fault propagation delay of 1µs and internal 50mA GATE pull-down for fast MOSFET turn-off. Its charge pump generates gate drive referenced to VOUT, delivering up to 9.8V enhancement above VOUT when VIN ≥12V.
Reverse protection is achieved by detecting negative VIN and automatically connecting GATE to VIN, forcing back-to-back N-MOSFETs into blocking state. The device includes a 36ms recovery timer to debounce noise and prevent chattering, and supports gentle shutdown via 90µA GATE pull-down with VOUT-tracking behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - powers from low-voltage battery start-up to nominal 12V/24V rail operation |
| Fault Withstand Range | –40V to 60V - blocks reverse polarity, load dump, and ISO 7637-2 pulse 5a surges without external TVS |
| UV/OV Threshold Accuracy | ±1.5% at 25°C, ±2.5% over –40°C to 125°C - enables precise 5V–18V window setting with 1% resistors |
| Quiescent Current | 125µA typical - minimizes standby drain in always-on automotive modules |
| Shutdown Current | 10µA max - supports ultra-low-power sleep modes in telematics and ADAS ECUs |
| Recovery Delay | 36ms - filters 50Hz/60Hz AC coupling and line noise before re-enabling power path |
| Package | 8-Lead Plastic TSOT-23 - compact footprint compatible with high-density PCB layouts |
Pinout & Package
Package: 8-Lead Plastic TSOT-23, –40°C to 125°C operating temperature range, exposed pad optional for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-channel MOSFET gate driver output | Charge-pump-enhanced output referenced to VOUT; drives external dual N-MOSFETs with up to 9.8V gate boost |
| VOUT | Output voltage sense reference | Sense node for charge pump regulation; defines GATE voltage reference and enables reverse-blocking logic |
| FAULT | Open-drain fault status indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN < UVLO; sinks 500µA with VOL ≤0.4V |
| SHDN | Active-high enable/disable control | High (>0.75V) enables gate drive; low (<0.4V) forces gentle shutdown and reduces IVIN to 10µA |
| VIN | Main power input terminal | Handles –40V to 60V transients; supplies internal LDOs and monitors for over/under/reverse faults |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; connects to resistive divider to set custom low-voltage cutoff |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; sets upper voltage limit independently of UV pin |
| GND | Device ground reference | Primary return path for internal circuitry and FAULT output; exposed pad may be connected to PCB ground |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV thresholds | Set via external resistor dividers - enables precise 5V–18V or custom windows without trimming or calibration |
| No input capacitor or TVS required | Withstands 60V transients and –40V reverse bias inherently - eliminates BOM cost and board space for discrete protection |
| Charge pump gate drive | Delivers up to 9.8V gate enhancement above VOUT - ensures full enhancement of standard logic-level N-MOSFETs |
| Gentle shutdown behavior | GATE tracks VOUT during turn-off - reduces di/dt-induced voltage spikes across parasitic inductance in high-current paths |
| AEC-Q100 Grade H qualification | Validated for –40°C to 125°C ambient operation - meets reliability requirements for engine control, body electronics, and ADAS |
Applications
| Automotive Load Dump Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: Protecting infotainment head units from ISO 7637-2 Pulse 5a (load dump) surges up to +60V in 12V vehicle systems. IC Role / Device Role / Timing Role: Overvoltage protection controller that disables power path within 1µs of fault detection and enforces 36ms recovery before reconnection. Use Value: Eliminates need for 60V-rated TVS diodes and reduces system BOM cost while maintaining AEC-Q100 compliance. | Use Scenario: Securing programmable logic controllers (PLCs) against field wiring errors including reversed DC supply polarity and brownout events. IC Role / Device Role / Timing Role: Dual-threshold supervisor that isolates downstream circuitry when input falls below 18V or rises above 30V, with reverse blocking to –40V. Use Value: Prevents catastrophic damage from miswired 24V industrial power supplies without adding series diode voltage drop or P-MOSFET conduction loss. |
| Portable Medical Instrumentation | Laptop Docking Station Power Management |
Use Scenario: Ensuring safe power-up of battery-powered ultrasound devices using interchangeable AC adapters with varying output voltages and polarities. IC Role / Device Role / Timing Role: Reverse/over/under-voltage guard that validates adapter input before enabling charging and system rails. Use Value: Enables use of universal adapters while preventing damage from incorrect or counterfeit power supplies. | Use Scenario: Managing power handoff between laptop battery and external 20V USB-C PD source in docking stations with hot-plug capability. IC Role / Device Role / Timing Role: Fault-tolerant power switch controller that blocks reverse current flow and enforces strict 15–22V input window. Use Value: Supports seamless source selection without risk of backfeeding or latch-up during plug/unplug cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage, undervoltage and reverse supply protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Integrated 60V N-channel MOSFET; fixed 2.5V–36V operating range; no adjustable UV/OV thresholds | Lower component count but less flexible window configuration; lacks reverse voltage blocking below –0.3V | Select when simplicity and integrated FET outweigh need for custom UV/OV trip points and true reverse polarity blocking |
| LTC4366HTS8#WTRPBF | Includes internal 100mΩ N-MOSFET; adds current limiting and thermal foldback; same UV/OV adjustability and –40V to 60V fault rating | Higher integration for lower-current loads (<2A); not suitable for high-current applications requiring external dual MOSFETs | Select when load current is ≤2A and board space is constrained; retains identical protection architecture and AEC-Q100 Grade H rating |
Compared with TPS26631RGER and LTC4366HTS8#WTRPBF, the LTC4365HTS8#WTRPBF offers unmatched flexibility in UV/OV threshold programming, true –40V reverse blocking, and support for high-current external dual N-MOSFETs - making it optimal for demanding automotive and industrial power path protection where design margin and configurability are critical.
Availability
LTC4365HTS8#WTRPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial PLC input conditioning, and portable medical instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC4365HTS8#WTRPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LTC4365 product line delivers robust input fault protection for harsh environments, designed specifically for automotive-grade power path supervision with integrated reverse polarity, overvoltage, and undervoltage blocking.
FAQ
What is the maximum transient voltage the LTC4365HTS8#WTRPBF can withstand without external protection components?
The LTC4365HTS8#WTRPBF withstands –40V to +60V on the VIN pin continuously, covering ISO 7637-2 Pulse 5a load dump events and reverse battery connection. No external TVS diode or input capacitor is required for most automotive and industrial applications, as confirmed in the Absolute Maximum Ratings and Typical Application sections of the official datasheet.
How does the LTC4365HTS8#WTRPBF implement reverse supply protection without a series diode or P-MOSFET?
The LTC4365HTS8#WTRPBF uses an internal reverse VIN comparator that, upon detecting negative input, connects the GATE pin directly to VIN. This forces back-to-back N-channel MOSFETs into blocking mode by holding M2's gate at VIN while M1's body diode clamps, ensuring zero forward current flow - eliminating conduction loss and heat generation associated with diode-based solutions.
Can the UV and OV thresholds of the LTC4365HTS8#WTRPBF be set independently, and what is the accuracy over temperature?
Yes, UV and OV thresholds are set independently via separate resistive dividers connected to dedicated pins. Each has a 0.5V internal reference with ±25mV hysteresis and ±2.5% total error over –40°C to 125°C, enabling accurate 5V–18V windows using standard 1% resistors - as verified in the Electrical Characteristics table and Applications Information section.
What is the purpose of the 36ms recovery delay in the LTC4365HTS8#WTRPBF, and is it configurable?
The 36ms recovery delay prevents chattering during noisy input conditions (e.g., 50Hz/60Hz AC coupling or load dump ringing) by requiring the input to remain within the UV/OV window for that duration before re-enabling the power path. It is fixed for the LTC4365HTS8#WTRPBF; the -1 variant offers 1ms delay, but the standard version does not support adjustment or bypass.
Does the LTC4365HTS8#WTRPBF require external MOSFETs, and which types are recommended for automotive use?
Yes, the LTC4365HTS8#WTRPBF requires external dual N-channel MOSFETs. For automotive applications, Analog Devices recommends Si9945 (60V, 3.0V VTH) or Si4214 (30V, 3.0V VTH) - both AEC-Q101 qualified and listed in Table 1 of the datasheet. Gate drive capability (up to 9.8V enhancement) ensures full enhancement even at cold cranking voltages.
LTC4365HTS8#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 125µA
- Voltage - Supply:
- 2.5V ~ 34V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365HTS8#WTRPBF FAQ
1.How can I place an order for LTC4365HTS8#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365HTS8#WTRPBF 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 LTC4365HTS8#WTRPBF reliable?
The price and inventory of LTC4365HTS8#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365HTS8#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC4365HTS8#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365HTS8#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365HTS8#WTRPBF?
LTC4365HTS8#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365HTS8#WTRPBF 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 LTC4365HTS8#WTRPBF?
For technical support, including LTC4365HTS8#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365HTS8#WTRPBF requirements.
6.How does Aetrix verify that LTC4365HTS8#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365HTS8#WTRPBF 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 LTC4365HTS8#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC4365HTS8#WTRPBF?
All LTC4365HTS8#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365HTS8#WTRPBF, 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 LTC4365HTS8#WTRPBF part is unused and in its original packaging.
Return procedure for LTC4365HTS8#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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