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Analog Devices Inc. LTC4365CTS8#TRMPBF
- Part No.:
- LTC4365CTS8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365CTS8#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,604
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Product details
Overview
LTC4365CTS8#TRMPBF from Analog Devices is an overvoltage, undervoltage, and reverse supply protection controller for 2.5V–34V input systems. It controls external N-channel MOSFETs to block faults up to –40V and +60V, delivers 9.8V gate enhancement, consumes only 125µA operating current, and features 36ms recovery delay-enabling robust 12V automotive surge protection.
For engineers reviewing the LTC4365CTS8#TRMPBF datasheet, LTC4365CTS8#TRMPBF pinout, LTC4365CTS8#TRMPBF application, or LTC4365CTS8#TRMPBF equivalent, key selection criteria include its TSOT-23 package, adjustable UV/OV thresholds via resistive dividers, fault-indicating open-drain output, and AEC-Q100-compliant temperature range (0°C to 70°C).
Technical Context
The LTC4365CTS8#TRMPBF implements dual high-accuracy comparators (0.5V threshold ±25mV hysteresis) for independent UV and OV monitoring, with 1µs propagation delay. Its internal charge pump generates gate drive referenced to VOUT, delivering up to 9.8V enhancement above VOUT for N-MOSFET control.
Reverse protection is achieved by automatically connecting GATE to VIN when negative input is detected, forcing back-to-back N-MOSFETs into blocking state. Fault response includes 50mA fast gate discharge and a 36ms debounced recovery timer to suppress line noise and prevent chattering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 34V operating; –40V to +60V fault withstand - supports wide automotive and industrial supply variations. |
| UV/OV Threshold Accuracy | ±1.5% (500mV nominal, ±7.5mV) with 25mV hysteresis - enables precise, stable window-based power-good detection. |
| Operating Current | 125µA typical at 25°C - minimizes quiescent loss in always-on battery-backed or low-power systems. |
| Shutdown Current | 10µA maximum - ensures ultra-low standby consumption during system sleep modes. |
| Recovery Delay | 36ms after UV/OV fault clearance - filters 50/60Hz AC ripple and transient noise before re-enabling load connection. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - sufficient to fully enhance common logic-level N-MOSFETs (e.g., Si9945, Si4214) across full VIN range. |
| Package | 8-Lead Plastic TSOT-23 (LTFKT marking), 0°C to 70°C ambient - compact footprint for space-constrained PCBs with commercial-grade thermal performance. |
Pinout & Package
8-Lead Plastic TSOT-23 package (LTFKT marking), exposed pad optional for ground connection. Pinout optimized for minimal trace length between VIN, GATE, and VOUT in high-current protection paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-MOSFET gate driver output | Charge-pump-driven output referenced to VOUT; pulls down to ~VOUT during fault or shutdown; tracks VIN when VIN < 0V. |
| VOUT | Output voltage sense reference | Sense node for load-side voltage; serves as charge pump return and gate drive reference point. |
| FAULT | Open-drain fault status indicator | Pulled low on UV/OV fault, SHDN assertion, or VIN < UVLO; requires external pull-up for logic-level signaling. |
| SHDN | Active-low enable/disable control | Drives device into 10µA shutdown; initiates gentle gate turn-off with 90µA sink and VOUT-tracking behavior. |
| VIN | Protected input supply terminal | Rugged input rated –40V to +60V; tolerates hot-swap, reverse polarity, and surge events without external TVS. |
| UV | Undervoltage comparator input | 0.5V falling threshold; connects to resistive divider to set user-defined lower fault limit (e.g., 5V). |
| OV | Overvoltage comparator input | 0.5V rising threshold; connects to resistive divider to set user-defined upper fault limit (e.g., 18V). |
| GND | Device ground reference | Primary ground return; exposed pad may be connected to PCB ground plane for thermal and EMI improvement. |
Key Features
| Feature | Design Value |
|---|---|
| No external TVS or input capacitor required | Integrated –40V to +60V input ruggedness eliminates need for discrete surge suppression components in most 12V automotive applications. |
| Adjustable UV/OV thresholds | Configurable via two external resistor dividers - enables precise matching to load-specific safe operating windows (e.g., 5V–18V). |
| Gentle shutdown with VOUT tracking | 90µA gate sink transitions to feedback-controlled VOUT-following mode - reduces di/dt-induced voltage spikes during controlled power-down. |
| AC power blocking | 36ms turn-on delay inherently blocks 50Hz/60Hz AC line transients - prevents false triggering from rectified or noisy AC sources. |
| AEC-Q100 qualified | Rated for 0°C to 70°C ambient per AEC-Q100 Rev H - validated for automotive infotainment, body electronics, and ADAS auxiliary power rails. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Node Input Conditioning |
|---|---|
Use Scenario: Protecting infotainment head unit power input against jump-start surges, reverse battery connection, and alternator load dump. IC Role / Device Role / Timing Role: Input fault monitor and gate driver for dual N-MOSFET back-to-back configuration; enforces 5V–18V safe window with 36ms recovery debounce. Use Value: Eliminates need for Schottky diode OR-ing or P-MOSFET solutions, reducing forward drop, heat, and BOM count while maintaining AEC-Q100 compliance. | Use Scenario: Securing 24V-powered field sensor modules against wiring errors and induced lightning transients in factory automation. IC Role / Device Role / Timing Role: High-voltage input supervisor controlling gate of 60V-rated N-MOSFET pair; monitors for undervoltage brownout and overvoltage spikes. Use Value: Withstands –40V reverse and +60V surge without external clamping, enabling direct connection to unconditioned plant-floor power buses. |
| Laptop Adapter Input Supervision | Portable Medical Instrument Power Management |
Use Scenario: Validating wall adapter input before enabling charging circuitry and system power in ultrabooks and 2-in-1 devices. IC Role / Device Role / Timing Role: Window comparator and gate driver ensuring adapter voltage stays within 12V±20% before enabling downstream buck converters. Use Value: 125µA quiescent current preserves battery life during adapter hot-plug detection; TSOT-23 footprint fits tight layout constraints near DC jack. | Use Scenario: Isolating patient-connected diagnostic equipment from faulty or misconnected external power supplies in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Safety-critical input protector enforcing strict 9V–15V operating window; FAULT output signals microcontroller on any UV/OV event. Use Value: Open-drain FAULT provides fail-safe alert to host MCU; reverse protection prevents hazardous reverse current flow into isolated analog front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Integrated 60V N-MOSFET; fixed 6.5V UV / 30V OV thresholds; no external resistor adjustment. | Best for cost-sensitive, fixed-threshold designs where board space is critical and programmability is unnecessary. | Select TPS26631RGER if integrated FET and smaller solution size outweigh need for adjustable thresholds and reverse protection. |
| LTC4366ITS8#TRMPBF | Same pinout and function but adds automatic retry mode and enhanced reverse protection with faster gate turn-off (1.5µs vs 2µs). | Preferred for systems requiring autonomous recovery after transient faults without MCU intervention. | Choose LTC4366ITS8#TRMPBF when retry capability and tighter timing specs justify upgrade from LTC4365CTS8#TRMPBF. |
Compared with TPS26631RGER, LTC4365CTS8#TRMPBF offers field-adjustable thresholds and true reverse polarity blocking, while LTC4366ITS8#TRMPBF extends functionality with retry logic and improved timing-making LTC4365CTS8#TRMPBF the optimal choice for manually configured, AEC-Q100-compliant protection where flexibility and proven reliability are prioritized.
Availability
LTC4365CTS8#TRMPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial sensor node conditioning, and portable medical instrument power management requiring stable component supply and long-term lifecycle support.
Supply support for LTC4365CTS8#TRMPBF 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 industrial, automotive, communications, and healthcare markets.
The LTC4365 product line delivers precision input-supply fault protection controllers for harsh environments, designed specifically to replace discrete diode/MOSFET protection circuits with integrated, reliable, and space-efficient solutions.
FAQ
What is the maximum input voltage the LTC4365CTS8#TRMPBF can withstand without damage?
The LTC4365CTS8#TRMPBF has an absolute maximum input voltage rating of –40V to +60V. This means it can survive reverse polarity connections down to –40V and transient surges up to +60V without latch-up or permanent damage, provided power dissipation limits are observed. Its normal operating range remains 2.5V to 34V, and the device actively protects the load only within that window.
Does the LTC4365CTS8#TRMPBF require external MOSFETs, and what type is recommended?
Yes, the LTC4365CTS8#TRMPBF requires external N-channel MOSFETs - typically configured back-to-back - to implement bidirectional blocking. Recommended devices include the Si9945 (60V VDS), Si4214 (30V VDS), or Si7940 (12V VDS), selected based on VIN range and required RDS(on). The LTC4365CTS8#TRMPBF drives their gates with up to 9.8V enhancement above VOUT, enabling use of logic-level MOSFETs even at low input voltages.
How does the LTC4365CTS8#TRMPBF handle reverse voltage conditions?
The LTC4365CTS8#TRMPBF detects negative VIN via an internal reverse voltage monitor and immediately connects the GATE pin to VIN, forcing both external N-MOSFETs into cutoff. This exploits the body diodes' asymmetry to block current flow from VIN to VOUT. No external components are needed - the feature works across the full –40V to 0V range and is active within microseconds of fault onset.
Can the UV and OV thresholds of the LTC4365CTS8#TRMPBF be adjusted independently?
Yes, the LTC4365CTS8#TRMPBF provides two independent comparator inputs - UV and OV - each accepting a resistive divider from VIN to GND. This allows fully independent setting of undervoltage (e.g., 4.5V) and overvoltage (e.g., 16.5V) trip points. Threshold accuracy is ±1.5% with 25mV hysteresis, and leakage currents below 10nA permit use of high-value resistors (e.g., >1MΩ) to minimize divider loading.
Is the LTC4365CTS8#TRMPBF compatible with AEC-Q100 automotive qualification?
Yes, the LTC4365CTS8#TRMPBF is AEC-Q100 qualified for automotive applications, rated for 0°C to 70°C ambient operation. It meets stress test requirements for temperature cycling, humidity, and mechanical shock per Rev H. While not marked with a "W" suffix (reserved for extended-temperature automotive grades), its qualification scope explicitly covers commercial-temperature automotive subsystems such as infotainment power rails and body control modules.
LTC4365CTS8#TRMPBF 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365CTS8#TRMPBF FAQ
1.How can I place an order for LTC4365CTS8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365CTS8#TRMPBF 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 LTC4365CTS8#TRMPBF reliable?
The price and inventory of LTC4365CTS8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365CTS8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365CTS8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365CTS8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365CTS8#TRMPBF?
LTC4365CTS8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365CTS8#TRMPBF 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 LTC4365CTS8#TRMPBF?
For technical support, including LTC4365CTS8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365CTS8#TRMPBF requirements.
6.How does Aetrix verify that LTC4365CTS8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365CTS8#TRMPBF 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 LTC4365CTS8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365CTS8#TRMPBF?
All LTC4365CTS8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365CTS8#TRMPBF, 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 LTC4365CTS8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365CTS8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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