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Analog Devices Inc. LTC4365ITS8-1#TRPBF
- Part No.:
- LTC4365ITS8-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365ITS8-1#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
LTC4365ITS8-1#TRPBF from Analog Devices is an automotive-grade N-channel MOSFET controller for overvoltage, undervoltage, and reverse supply protection. It operates from 2.5V to 34V input, withstands –40V to 60V fault conditions, delivers 9.8V gate enhancement, consumes 125µA quiescent current, and features 1ms fast recovery-enabling robust power path control in 12V automotive systems and industrial power supplies.
For engineers reviewing the LTC4365ITS8-1#TRPBF datasheet, LTC4365ITS8-1#TRPBF pinout, LTC4365ITS8-1#TRPBF application, or LTC4365ITS8-1#TRPBF equivalent, this device supports precise UV/OV window setting via external resistive dividers, integrates reverse polarity detection with automatic gate clamping to VIN, and provides open-drain FAULT signaling for system-level fault management in AEC-Q100-compliant designs.
Technical Context
The LTC4365ITS8-1#TRPBF implements dual high-accuracy comparators (0.5V threshold ±25mV hysteresis) for independent UV and OV monitoring, with fault propagation delay under 2µs. Its internal charge pump drives external back-to-back N-channel MOSFETs, delivering up to 9.8V gate-to-VOUT enhancement across the full operating range.
Unlike the standard LTC4365, the -1 variant reduces GATE recovery delay from 36ms to 1ms after UV/OV fault clearance-critical for applications requiring rapid reconnection after transient surges. The SHDN pin enables gentle shutdown with 90µA gate pull-down and VOUT-tracking behavior, minimizing load-current slew rate and parasitic voltage spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 34V operating; –40V to 60V absolute max-supports wide automotive battery transients and hot-swap resilience. |
| UV/OV Threshold Accuracy | ±1.5% over temperature-enables stable 5V–18V power-good windows using standard 1% resistors without trimming. |
| GATE Drive Enhancement | Up to 9.8V above VOUT-ensures full enhancement of common logic-level N-MOSFETs (e.g., Si9945) even at low VIN. |
| Recovery Delay Time | 1ms (LTC4365ITS8-1#TRPBF only)-reconnects load within one AC line cycle after fault clearance, avoiding brownout lockout. |
| Quiescent Current | 125µA typical at 12V-minimizes standby power loss in always-on vehicle modules. |
| Shutdown Current | 10µA max-enables ultra-low-power sleep modes during ignition-off states. |
| Operating Temperature | –40°C to +85°C-qualified per AEC-Q100 Grade 3 for under-hood and cabin electronics. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (3mm × 1.75mm), exposed pad optional for thermal relief. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-Channel MOSFET Gate Driver Output | Charge-pump-driven output referenced to VOUT; pulls down to ~VOUT–0.2V during fault; clamps to VIN during reverse input. |
| VOUT | Output Voltage Sense Reference | Sense node for gate drive reference and reverse protection logic; must be connected to load-side of external MOSFETs. |
| FAULT | Open-Drain Fault Status Output | Pulled low on UV/OV fault, SHDN assertion, or VIN < UVLO; requires external pull-up for system interrupt signaling. |
| SHDN | Active-High Shutdown Control Input | Enables gate drive when >0.75V; initiates gentle turn-off with 90µA sink and VOUT-tracking behavior when pulled low. |
| VIN | Protected Input Supply Terminal | Rugged input rated –40V to 60V; connects directly to battery or adapter; feeds internal LDOs and comparators. |
| UV | Undervoltage Comparator Input | 0.5V falling-threshold comparator with 25mV hysteresis; accepts high-impedance resistive divider for adjustable UV trip point. |
| OV | Overvoltage Comparator Input | 0.5V rising-threshold comparator with 25mV hysteresis; enables precise programmable OV cutoff without external op-amps. |
| GND | Device Ground Reference | Primary ground return for internal circuitry; exposed pad may be connected to PCB ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fast 1ms Recovery | LTC4365ITS8-1#TRPBF variant eliminates 36ms debounce delay-enables immediate reconnection after brief transients like load dump spikes. |
| No External TVS Required | Integrated 60V fault tolerance and 125µA operating current allow direct connection to 12V/24V automotive rails without series TVS diodes in most cases. |
| Reverse Polarity Protection | Automatic gate clamping to negative VIN isolates load from –40V inputs without external P-FET or diode-reducing BOM count and forward voltage drop. |
| Adjustable UV/OV Window | Two independent 0.5V comparator inputs accept standard resistor dividers-enables flexible power-good thresholds (e.g., 5V–18V) without custom IC variants. |
| AEC-Q100 Qualified | Rated for –40°C to +85°C operation with automotive reliability testing-meets requirements for body control modules, infotainment, and ADAS power supervisors. |
Applications
| Automotive Power Distribution | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Protecting CAN/LIN transceivers and microcontrollers from battery reversal, jump-start surges, and alternator load dump events in 12V vehicle subsystems. IC Role / Device Role / Timing Role: Input voltage supervisor controlling back-to-back N-MOSFETs to isolate downstream circuitry during faults; FAULT signal triggers MCU watchdog reset. Use Value: Eliminates need for discrete Schottky diodes or P-MOSFETs-reducing conduction loss by >80% and enabling compact 8-pin TSOT-23 footprint on space-constrained PCBs. | Use Scenario: Securing field-powered analog input channels against wiring errors and induced transients in factory automation equipment. IC Role / Device Role / Timing Role: Dual-supply protector managing redundant 24V DC inputs with SHDN-controlled selection and UV/OV window validation before enabling sensor interface. Use Value: 1ms recovery ensures uninterrupted analog acquisition during momentary grid sags; 10µA shutdown current extends battery backup runtime in unpowered states. |
| Portable Medical Instrumentation | Laptop Docking Station Power Management |
Use Scenario: Safeguarding lithium-ion battery charging circuits and precision ADCs from misconnected AC adapters or reversed battery packs in handheld diagnostic tools. IC Role / Device Role / Timing Role: Reverse/overvoltage guard placed between external power jack and internal PMIC; UV threshold set to 3.0V to prevent operation below safe battery voltage. Use Value: 9.8V gate drive ensures full enhancement of low-RDS(on) N-MOSFETs at 3.3V system rail-minimizing insertion loss while maintaining <125µA idle draw. | Use Scenario: Enabling hot-plug detection and surge suppression for USB-C PD power delivery paths in multi-port docking stations. IC Role / Device Role / Timing Role: Primary input supervisor validating 5V–20V PD source compliance before enabling buck converters and USB data switches. Use Value: Adjustable OV threshold prevents damage from non-compliant 24V adapters; FAULT output synchronizes with USB PD policy engine for coordinated fault response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365ITS8#TRPBF | 36ms recovery delay vs. 1ms; identical pinout, package, and temperature grade. | Suitable where slower reconnection is acceptable (e.g., non-real-time sensors); lacks fast transient response needed for motor drivers. | Select LTC4365ITS8#TRPBF if system tolerates longer fault hold-off; otherwise LTC4365ITS8-1#TRPBF is preferred for time-critical loads. |
| TPS26631RGER | Integrated 60V N-MOSFET; fixed 5.5V–36V OVP; no UV or reverse protection; 2.5ms recovery. | Single-chip solution for basic overvoltage-only use cases; cannot replace LTC4365ITS8-1#TRPBF in reverse-polarity or adjustable-window designs. | Choose TPS26631RGER only when reverse protection and UV adjustment are unnecessary-and board space is more constrained than timing requirements. |
Compared with LTC4365ITS8#TRPBF, the LTC4365ITS8-1#TRPBF offers 36× faster fault recovery for dynamic power environments, while TPS26631RGER trades configurability and reverse protection for monolithic integration-making LTC4365ITS8-1#TRPBF the optimal choice for AEC-Q100-compliant, multi-fault-resilient 12V/24V systems requiring precise window control.
Availability
LTC4365ITS8-1#TRPBF is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O modules, portable medical instrumentation, and laptop docking station power management requiring stable component supply and AEC-Q100-compliant sourcing.
Supply support for LTC4365ITS8-1#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 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 rugged, configurable input protection controllers for harsh voltage environments-designed specifically for automotive, industrial, and portable equipment where reliability under reverse, overvoltage, and undervoltage stress is mission-critical.
FAQ
What is the key functional difference between LTC4365ITS8-1#TRPBF and LTC4365ITS8#TRPBF?
The LTC4365ITS8-1#TRPBF features a 1ms GATE recovery delay after UV/OV fault clearance, whereas the standard LTC4365ITS8#TRPBF requires 36ms. Both share identical pinout, package, temperature range (–40°C to +85°C), and AEC-Q100 qualification. This 36× faster recovery makes LTC4365ITS8-1#TRPBF ideal for applications needing rapid reconnection after transient surges-such as motor control or real-time sensor interfaces-where prolonged power interruption is unacceptable.
Can LTC4365ITS8-1#TRPBF protect against negative input voltages, and how does it achieve this?
Yes, LTC4365ITS8-1#TRPBF provides true reverse supply protection down to –40V. It achieves this through an internal reverse-voltage comparator that, upon detecting negative VIN, automatically connects the GATE pin to VIN. This forces the body diode of the downstream N-MOSFET into blocking mode while keeping the upstream MOSFET off-preventing reverse current flow without external diodes or P-MOSFETs. The design requires back-to-back N-channel MOSFETs and is validated for automotive battery reversal scenarios.
What external components are required to configure overvoltage and undervoltage thresholds for LTC4365ITS8-1#TRPBF?
LTC4365ITS8-1#TRPBF requires only three external resistors (R1, R2, R3) forming a precision resistive divider network connected to the OV and UV pins. The device's 0.5V internal comparator thresholds and <10nA input leakage enable use of standard 1% metal-film resistors-no capacitors, TVS diodes, or op-amps are needed. Example values for a 5V–18V window are R3 = 2.74MΩ, R1 = 84.5kΩ, and R2 = 215kΩ, yielding UV = 5.07V and OV = 17.99V with minimal offset error.
How does the SHDN pin function in LTC4365ITS8-1#TRPBF, and what happens to the GATE output during shutdown?
The SHDN pin is an active-high control input: pulling it low places LTC4365ITS8-1#TRPBF into 10µA shutdown mode and initiates gentle gate turn-off. During shutdown, a 90µA current sink gradually discharges the GATE pin until it tracks VOUT-ensuring controlled MOSFET turn-off that minimizes load-current dI/dt and associated voltage spikes. Once GATE falls within 400mV of ground (at VOUT < 4.5V), it is actively pulled low. This behavior protects sensitive downstream circuitry during power sequencing.
Is LTC4365ITS8-1#TRPBF compatible with common logic-level N-channel MOSFETs, and what gate drive capability does it provide?
Yes, LTC4365ITS8-1#TRPBF is fully compatible with standard logic-level N-channel MOSFETs such as Si9945, Si4214, and Si7940. Its integrated charge pump delivers up to 9.8V of gate-to-VOUT enhancement-sufficient to fully enhance MOSFETs with VGS(th) ≤ 3.0V across the entire 2.5V–34V input range. Gate drive strength is load-dependent but supports ≥2.2nF gate capacitance with sub-microsecond turn-off timing, ensuring reliable switching even with high-side N-MOSFET configurations.
LTC4365ITS8-1#TRPBF 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365ITS8-1#TRPBF FAQ
1.How can I place an order for LTC4365ITS8-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365ITS8-1#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 LTC4365ITS8-1#TRPBF reliable?
The price and inventory of LTC4365ITS8-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365ITS8-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4365ITS8-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365ITS8-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365ITS8-1#TRPBF?
LTC4365ITS8-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365ITS8-1#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 LTC4365ITS8-1#TRPBF?
For technical support, including LTC4365ITS8-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365ITS8-1#TRPBF requirements.
6.How does Aetrix verify that LTC4365ITS8-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365ITS8-1#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 LTC4365ITS8-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4365ITS8-1#TRPBF?
All LTC4365ITS8-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365ITS8-1#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 LTC4365ITS8-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4365ITS8-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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