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Analog Devices Inc. LTC4365CTS8#TRPBF
- Part No.:
- LTC4365CTS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365CTS8#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:13,419
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Product details
Overview
LTC4365CTS8#TRPBF 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-used in automotive surge protection, industrial automation, and portable instrumentation.
For engineers reviewing the LTC4365CTS8#TRPBF datasheet, LTC4365CTS8#TRPBF pinout, LTC4365CTS8#TRPBF application, or LTC4365CTS8#TRPBF equivalent, key selection criteria include its TSOT-23 package, adjustable UV/OV thresholds via resistive dividers, fault-indicating open-drain FAULT output, and AEC-Q100-compliant temperature range (0°C to 70°C).
Technical Context
The LTC4365CTS8#TRPBF integrates dual precision comparators (0.5V threshold ±25mV hysteresis) for independent UV and OV monitoring, a charge pump delivering up to 9.8V gate drive referenced to VOUT, and fast fault response (1µs propagation delay). Its GATE pin sinks 50mA during UV/OV faults and supports gentle shutdown with 90µA pull-down current.
Reverse protection is implemented via internal switch that connects GATE to negative VIN, forcing back-to-back N-MOSFETs into blocking state. The device operates across –40V to 60V input protection range while consuming just 10µA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 34V operating; –40V to +60V fault withstand - enables use with 12V automotive, industrial, and battery-powered systems. |
| UV/OV Threshold Accuracy | ±7.5mV at 0.5V reference - allows precise 5V–18V window setting using standard 1% resistors without trimming. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of common N-channel MOSFETs (e.g., Si9945) even at low VIN. |
| Recovery Delay | 36ms after UV/OV fault clearance - prevents chattering due to line noise or transient excursions. |
| Operating Current | 125µA typical - minimizes quiescent load on primary power source in always-on applications. |
| Shutdown Current | 10µA maximum - supports ultra-low-power system-level sleep modes. |
| Package | 8-Lead Plastic TSOT-23 - compact footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
8-Lead Plastic TSOT-23 package (3.0mm × 1.7mm × 0.9mm), exposed pad optional for thermal relief. Pin 1 marked by dot; pin numbering follows standard TSOT-23 convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-channel MOSFET gate driver output | Charge-pump-enhanced output referenced to VOUT; pulls down with 50mA sink during faults; tracks VOUT during gentle shutdown. |
| VOUT | Output voltage sense input | Senses voltage at load side of external MOSFETs; serves as charge pump return and gate drive reference point. |
| FAULT | Open-drain fault status indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN < VIN(UVLO); requires external pull-up for logic-level interfacing. |
| SHDN | Active-low shutdown control input | Drives device into 10µA shutdown state; initiates gentle gate turn-off with 90µA sink and feedback-controlled VOUT tracking. |
| VIN | Main supply input | Withstands –40V to +60V; powers internal circuitry; monitored for UV/OV conditions via external divider on UV/OV pins. |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; connects to resistive divider to set lower fault limit (e.g., 5V). |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; connects to resistive divider to set upper fault limit (e.g., 18V). |
| GND | Device ground reference | Primary ground connection; exposed pad may be connected to PCB ground plane for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV thresholds | Set via external resistor dividers - enables custom 5V–18V (or other) windows without component change. |
| No input capacitor or TVS required | Robust –40V to +60V input tolerance eliminates need for external clamping components in most 12V automotive designs. |
| Charge pump gate drive | Delivers up to 9.8V enhancement above VOUT - ensures reliable turn-on of low-threshold N-MOSFETs like Si4214 or Si9945. |
| Gentle shutdown | 90µA controlled gate discharge with VOUT tracking - reduces dI/dt-induced voltage spikes across parasitic inductance. |
| AC power blocking | 36ms turn-on delay filters 50Hz/60Hz AC - prevents false triggering when hot-plugging AC adapters or batteries. |
Applications
| Automotive Surge Protection | Industrial Automation Power Input |
|---|---|
Use Scenario: Protecting infotainment ECUs against load dump (up to +60V) and reverse battery connection (–40V) in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Fault protection controller that isolates downstream circuitry by disabling external N-MOSFETs within 1µs of UV/OV detection. Use Value: Eliminates need for discrete TVS diodes and reverse polarity protection circuits, reducing BOM count and board area. | Use Scenario: Securing PLC I/O modules powered from unregulated 24V DC supplies subject to brownouts and transients. IC Role / Device Role / Timing Role: Window comparator-based supervisor ensuring power delivery only when input remains between 20V and 30V. Use Value: Prevents erratic behavior or latch-up during undervoltage events while maintaining low 125µA quiescent draw. |
| Portable Instrumentation Power Path | Laptop Docking Station Input Protection |
Use Scenario: Managing dual-input power (AC adapter + removable Li-ion battery) in handheld test equipment with strict size constraints. IC Role / Device Role / Timing Role: Gate driver enabling back-to-back N-MOSFET configuration for bidirectional reverse protection and low-loss forward conduction. Use Value: Achieves <10mΩ effective RDS(on) path using cost-effective N-MOSFETs instead of higher-RF P-MOSFETs or Schottky diodes. | Use Scenario: Safeguarding USB-C PD-enabled docking stations against misconnected 20V adapters or accidental 12V/5V supply swaps. IC Role / Device Role / Timing Role: Adjustable UV/OV monitor with programmable 5V–20V window and open-drain FAULT signal for host microcontroller alerting. Use Value: Enables firmware-controlled power arbitration and graceful shutdown before damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Integrated 60V eFuse with current limiting; no external MOSFET required; fixed 2.5V–60V operating range; no reverse voltage protection. | Best suited for current-limited hot-swap applications where reverse polarity is not a concern and board space is critical. | Select TPS26631RGER when integrated current limiting and smaller solution size outweigh need for reverse protection and adjustable thresholds. |
| MAX14749ETA+T | 36V-rated protection IC with integrated 28mΩ FETs; includes reverse polarity and overtemperature protection; fixed 3.5V UV threshold. | Targeted at space-constrained consumer electronics; lacks user-adjustable OV/UV and external FET flexibility. | Choose MAX14749ETA+T for simplified design with built-in FETs and thermal protection, but only if fixed thresholds meet system requirements. |
Compared with TPS26631RGER and MAX14749ETA+T, the LTC4365CTS8#TRPBF provides unique flexibility in UV/OV threshold adjustment, robust –40V reverse protection, and support for high-voltage external N-MOSFETs - making it optimal for automotive and industrial systems requiring customizable, high-reliability input conditioning.
Availability
LTC4365CTS8#TRPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial automation power inputs, and portable instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for LTC4365CTS8#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 LTC4365CTS8#TRPBF belongs to Analog Devices' power protection controller product line, designed specifically for ruggedized input conditioning in harsh environments where overvoltage, undervoltage, and reverse polarity threats coexist.
FAQ
What is the maximum input voltage the LTC4365CTS8#TRPBF can withstand without damage?
The LTC4365CTS8#TRPBF has an absolute maximum input voltage rating of –40V to +60V. This means it can survive transient surges up to +60V or reverse connections down to –40V without latch-up or permanent damage, provided internal power dissipation limits are observed. Its normal operating range remains 2.5V to 34V, and the device actively protects the load only within this window unless configured otherwise via external resistors.
Does the LTC4365CTS8#TRPBF require external MOSFETs, and what type is recommended?
Yes, the LTC4365CTS8#TRPBF requires external N-channel MOSFETs - typically configured as back-to-back devices for full reverse polarity protection. Recommended parts include Si9945 (60V), Si4214 (30V), or Si7940 (12V), selected based on system VIN range and required RDS(on). The LTC4365CTS8#TRPBF drives their gates with up to 9.8V enhancement above VOUT, so MOSFETs must have VGS(th) ≤ 2.5V for reliable turn-on at low VIN.
How does the LTC4365CTS8#TRPBF handle reverse voltage conditions?
The LTC4365CTS8#TRPBF detects negative VIN via an internal reverse voltage monitor and immediately connects the GATE pin to VIN, forcing both external back-to-back N-MOSFETs into cutoff. This blocks current flow while allowing the body diode of the upstream FET to clamp, preventing negative voltage from reaching VOUT. The LTC4365CTS8#TRPBF sustains –40V continuously and responds within microseconds, as verified in Figure 8 of the datasheet.
Can the UV and OV thresholds of the LTC4365CTS8#TRPBF be adjusted independently?
Yes - the LTC4365CTS8#TRPBF provides separate UV and OV pins, each accepting a resistive divider from VIN to GND. With 0.5V internal reference and ±25mV hysteresis per comparator, thresholds can be set independently (e.g., UV = 5V, OV = 18V) using standard 1% resistors. The datasheet provides a three-step calculation method to minimize error from pin leakage current, ensuring accuracy across temperature.
Is the LTC4365CTS8#TRPBF qualified for automotive applications?
The LTC4365CTS8#TRPBF is rated for 0°C to 70°C ambient operation and is not AEC-Q100 qualified. For automotive use, Analog Devices offers the LTC4365ITS8#TRPBF (–40°C to +85°C, AEC-Q100 Grade 3) and LTC4365HTS8#TRPBF (–40°C to +125°C, AEC-Q100 Grade 1). The LTC4365CTS8#TRPBF is intended for commercial/industrial applications where extended temperature and qualification are not required.
LTC4365CTS8#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365CTS8#TRPBF FAQ
1.How can I place an order for LTC4365CTS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365CTS8#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 LTC4365CTS8#TRPBF reliable?
The price and inventory of LTC4365CTS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365CTS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4365CTS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365CTS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365CTS8#TRPBF?
LTC4365CTS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365CTS8#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 LTC4365CTS8#TRPBF?
For technical support, including LTC4365CTS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365CTS8#TRPBF requirements.
6.How does Aetrix verify that LTC4365CTS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365CTS8#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 LTC4365CTS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4365CTS8#TRPBF?
All LTC4365CTS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365CTS8#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 LTC4365CTS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC4365CTS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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