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Analog Devices Inc. LTC4365HTS8#TRMPBF
- Part No.:
- LTC4365HTS8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365HTS8#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,076
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Product details
Overview
LTC4365HTS8#TRMPBF from Analog Devices is a high-reliability automotive-grade overvoltage, undervoltage, and reverse supply protection controller for N-channel MOSFETs. It operates from 2.5V to 34V input, withstands –40V to 60V fault transients, delivers up to 9.8V gate enhancement, consumes only 125µA quiescent current, and features 36ms recovery delay - all in an 8-lead TSOT-23 package rated for –40°C to 125°C. It is used in 12V automotive power rails to prevent load damage from battery reversal, jump-start surges, or alternator overvoltage.
For engineers reviewing the LTC4365HTS8#TRMPBF datasheet, LTC4365HTS8#TRMPBF pinout, LTC4365HTS8#TRMPBF application, or LTC4365HTS8#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive temperature performance, and real-world protection timing behavior - not generic controller descriptions.
Technical Context
The LTC4365HTS8#TRMPBF integrates dual precision comparators (0.5V threshold ±25mV hysteresis) for user-adjustable UV/OV setpoints via external resistive dividers, plus a charge pump that drives external back-to-back N-channel MOSFETs with up to 9.8V gate-to-source enhancement. Its reverse protection circuit actively connects GATE to negative VIN to force MOSFET turn-off during –40V faults.
It implements three distinct shutdown modes: fast turn-off (50mA GATE sink), gentle turn-off (90µA sink + VOUT-tracking feedback), and low-power shutdown (10µA). Fault detection propagates in ≤2µs, and recovery requires ≥36ms of stable input within the UV/OV window before re-enabling the gate drive - a deliberate debounce against 50/60Hz line noise and transient spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - supports nominal 3.3V, 5V, 12V, and 24V systems without external LDO. |
| Fault Withstand Range | –40V to 60V - blocks automotive jump-start surges, battery reversal, and alternator load dump events. |
| Quiescent Current | 125µA at –40°C to 125°C - enables always-on protection in battery-backed systems without excessive drain. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of standard logic-level N-channel MOSFETs (e.g., Si9945) across full VIN range. |
| UV/OV Threshold Accuracy | ±1.5% over temperature - enables precise 5V–18V window setting for 12V automotive loads with minimal resistor tolerance dependency. |
| Recovery Delay | 36ms after fault clearance - filters 50/60Hz AC coupling and prevents chattering during noisy supply transitions. |
| Shutdown Current | 10µA max at –40°C to 125°C - maintains ultra-low standby power during system sleep or key-off states. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23, –40°C to 125°C operating 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; sinks 50mA during fault, pulls down gently during SHDN. |
| VOUT | Output voltage sense reference | Serves as charge pump return and gate drive reference; must be connected to load-side of external MOSFETs. |
| FAULT | Open-drain fault status indicator | Pulled low on UV/OV fault, SHDN assertion, or VIN < VIN(UVLO); compatible with 5V/3.3V logic inputs. |
| SHDN | Active-high enable/disable control | Logic threshold 0.75V; asserts low-power mode (10µA) and initiates gentle gate turn-off when pulled low. |
| VIN | Protected input supply terminal | Handles –40V to 60V transients; internal clamping and reverse-monitor circuitry isolate VOUT during faults. |
| 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 return for internal circuitry and FAULT output; exposed pad may be tied to PCB ground. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive AEC-Q100 Grade H | Qualified for –40°C to 125°C ambient operation with full electrical characterization and reliability testing per automotive standards. |
| No input TVS or capacitor required | Internal robustness eliminates need for external surge suppression components in most 12V automotive applications. |
| Adjustable UV/OV thresholds | Configurable via two external resistors per threshold - enables precise match to load requirements without trimming. |
| Reverse supply blocking to –40V | Active gate control forces back-to-back N-MOSFETs into safe-off state during battery reversal or negative transients. |
| Gentle shutdown with VOUT tracking | 90µA controlled gate discharge followed by feedback loop that holds GATE ≈ VOUT - minimizes load-current dI/dt and output voltage undershoot. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Stage |
|---|---|
|
Use Scenario: Protecting infotainment head units and ADAS ECUs from jump-start surges (up to 60V), battery reversal (–40V), and alternator overvoltage events in 12V vehicle architectures. IC Role / Device Role / Timing Role: Controller for dual N-channel MOSFETs placed between battery feed and downstream DC/DC converters; enforces 36ms power-good holdoff after fault clearance. Use Value: Eliminates need for bulky P-MOSFETs or Schottky diodes while maintaining <15mΩ on-resistance path and full AEC-Q100 compliance. |
Use Scenario: Securing programmable logic controller (PLC) field I/O modules powered from unregulated 24V industrial supplies subject to brownouts and lightning-induced transients. IC Role / Device Role / Timing Role: UV/OV supervisor and gate driver for discrete N-MOSFETs; detects 18V–30V valid window and blocks sub-18V undervoltage dips lasting <36ms. Use Value: Prevents spurious PLC resets during momentary dips while enabling fast recovery (no latch-up) once supply stabilizes. |
| Laptop Adapter Input Protection | Portable Medical Instrument Power Path |
|
Use Scenario: Safeguarding USB-C PD-enabled laptops from incorrect wall adapters (e.g., 20V applied to 5V-only port) or reversed polarity barrel jacks. IC Role / Device Role / Timing Role: Front-end protector controlling series N-MOSFETs; uses adjustable OV threshold (e.g., 6.5V) and UV lockout (4.2V) to enforce adapter compatibility. Use Value: Enables use of low-RDS(on) N-MOSFETs instead of lossy P-MOSFETs - reducing heat rise by >40% at 3A load. |
Use Scenario: Ensuring fail-safe power sequencing in portable ECG monitors and infusion pumps where battery reversal or charger misconnection must not damage analog front-ends. IC Role / Device Role / Timing Role: Reverse-voltage blocker and window monitor; asserts FAULT signal to microcontroller upon any UV/OV/reverse event, triggering controlled shutdown. Use Value: Meets IEC 60601-1 creepage/clearance requirements via single-chip solution - no external high-voltage comparators or discrete protection FETs needed. |
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 protected switch with internal MOSFETs; fixed 3.5V UV and 36V OV thresholds; no adjustable window. | Best for space-constrained designs needing monolithic solution; lacks LTC4365HTS8#TRMPBF's external MOSFET flexibility and –40V reverse blocking. | Select TPS26631RGER if board area is critical and fixed thresholds suffice; choose LTC4365HTS8#TRMPBF when adjustable protection window, reverse blocking, or discrete MOSFET optimization is required. |
| MAX14579ETA+ | USB-focused protection IC with 5.5V OV clamp and integrated 1.5A switch; no reverse voltage handling or automotive temp grade. | Designed for USB OTG/charging paths only; unsuitable for 12V automotive or industrial supply rail protection. | Use MAX14579ETA+ only for USB power switching; LTC4365HTS8#TRMPBF remains preferred for wide-range, high-reliability DC supply protection. |
Compared with TPS26631RGER and MAX14579ETA+, the LTC4365HTS8#TRMPBF uniquely combines AEC-Q100 H-grade operation, fully adjustable UV/OV thresholds, active –40V reverse blocking, and external N-MOSFET control - making it the only option qualified for demanding automotive and industrial 12V/24V rail protection where design flexibility and fault coverage are mandatory.
Availability
LTC4365HTS8#TRMPBF is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input stages, and portable medical device power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4365HTS8#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, Inc. 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, precision-supervised power path controllers for harsh environments - designed specifically to replace discrete protection circuits in automotive and industrial systems with compact, AEC-Q100-qualified solutions.
FAQ
What is the maximum continuous input voltage the LTC4365HTS8#TRMPBF can handle without damage?
The LTC4365HTS8#TRMPBF has an absolute maximum VIN rating of –40V to 60V. It can withstand 60V continuously on the VIN pin without damage, and its protection circuitry remains fully functional across its 2.5V to 34V operating range. This makes the LTC4365HTS8#TRMPBF suitable for automotive load-dump scenarios where transient voltages reach 60V per ISO 7637-2 Pulse 5a.
Does the LTC4365HTS8#TRMPBF require external MOSFETs, and what type is recommended?
Yes, the LTC4365HTS8#TRMPBF requires external back-to-back N-channel MOSFETs to implement bidirectional blocking. Recommended devices include the Si9945 (60V-rated dual N-MOSFET) for 12V automotive applications or Si4214 (30V-rated) for 5V–24V industrial use. The LTC4365HTS8#TRMPBF's charge pump delivers up to 9.8V gate enhancement, enabling reliable turn-on of logic-level MOSFETs even at low VIN.
How does the LTC4365HTS8#TRMPBF handle reverse supply conditions like battery reversal?
The LTC4365HTS8#TRMPBF employs an internal reverse-voltage comparator that, upon detecting VIN < 0V, actively connects the GATE pin to VIN. This forces both external N-MOSFETs into cutoff - leveraging body diode blocking to prevent reverse current flow. The LTC4365HTS8#TRMPBF sustains –40V continuously and responds within microseconds, ensuring no reverse voltage appears at VOUT.
Can the UV and OV thresholds of the LTC4365HTS8#TRMPBF be adjusted independently?
Yes, the LTC4365HTS8#TRMPBF provides separate UV and OV pins, each accepting a resistive divider to set independent thresholds. The UV pin uses a 0.5V falling threshold with 25mV hysteresis; the OV pin uses a 0.5V rising threshold with identical hysteresis. For example, a 12V automotive rail can be configured with UV = 5V and OV = 18V using standard 1% resistors - values confirmed in the datasheet's Figure 4 and Table 1.
Is the LTC4365HTS8#TRMPBF pin-compatible with the LTC4365CTS8#TRMPBF or other variants?
The LTC4365HTS8#TRMPBF shares identical pinout and footprint with all TSOT-23 variants (e.g., LTC4365CTS8#TRMPBF, LTC4365ITS8#TRMPBF), differing only in temperature grade (–40°C to 125°C vs. 0°C to 70°C or –40°C to 85°C). Electrical specifications including UV/OV accuracy, gate drive, and fault timing are fully characterized across the H-grade range, making it a direct drop-in replacement where extended temperature operation is required.
LTC4365HTS8#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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365HTS8#TRMPBF FAQ
1.How can I place an order for LTC4365HTS8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365HTS8#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 LTC4365HTS8#TRMPBF reliable?
The price and inventory of LTC4365HTS8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365HTS8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365HTS8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365HTS8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365HTS8#TRMPBF?
LTC4365HTS8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365HTS8#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 LTC4365HTS8#TRMPBF?
For technical support, including LTC4365HTS8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365HTS8#TRMPBF requirements.
6.How does Aetrix verify that LTC4365HTS8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365HTS8#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 LTC4365HTS8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365HTS8#TRMPBF?
All LTC4365HTS8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365HTS8#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 LTC4365HTS8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365HTS8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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