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Analog Devices Inc. LTC4361HDC-2#TRMPBF
- Part No.:
- LTC4361HDC-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4361HDC-2#TRMPBF.pdf
- Description:
- IC OVP/OCP PROTECTION CTLR 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:508
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Product details
Overview
LTC4361HDC-2#TRMPBF from Analog Devices is an overvoltage/overcurrent protection controller designed to safeguard 2.5V–5.5V portable systems using external N-channel MOSFETs. It delivers 5.8V ±2% overvoltage threshold, 50mV ±10% overcurrent trip, <1µs overvoltage turn-off, and auto-retry recovery after overcurrent faults. It is deployed in USB-powered handheld devices requiring robust transient immunity up to 80V without TVS diodes.
For engineers reviewing the LTC4361HDC-2#TRMPBF datasheet, LTC4361HDC-2#TRMPBF pinout, LTC4361HDC-2#TRMPBF application, or LTC4361HDC-2#TRMPBF equivalent, key selection criteria include its –40°C to 125°C operating range, DFN (2mm × 2mm) package with exposed pad, GATE/GATEP dual-MOSFET drive capability, and H-grade thermal reliability for automotive and industrial edge devices.
Technical Context
The LTC4361HDC-2#TRMPBF implements a dual-threshold comparator architecture: one for IN-pin overvoltage detection (5.8V trip, 5.7V recovery) and another for SENSE-to-IN differential overcurrent detection (50mV, 10µs glitch filter). Its internal charge pump ensures ≥4.5V gate drive above OUT for logic-level N-MOSFETs across 3V–5.5V input range.
It features asymmetric fault response: overvoltage events trigger immediate 30mA fast GATE pull-down (<1µs), while overcurrent faults initiate 130ms auto-retry startup delay before re-enabling GATE ramp-up. The PWRGD output asserts low only after GATE exceeds VGATE(TH) for ≥65ms, providing validated power-good timing independent of input transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Threshold | 5.8V ±2% - enables precise clamping at 5.8V without external components; hysteresis prevents chatter near threshold |
| Overcurrent Threshold | 50mV ±10% - sets current limit via sense resistor; supports accurate ITRIP = 50mV/RSENSE calculation |
| GATE Turn-Off Delay | <1µs - isolates load within sub-microsecond during 80V transients, preventing downstream damage |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and high-ambient portable applications |
| Package | 8-Lead DFN (2mm × 2mm) with exposed thermal pad - enables compact layout and efficient heat dissipation in space-constrained designs |
| Recovery Mode | Auto-Retry (LTC4361-2 variant) - automatically restarts after 130ms delay post-overcurrent, eliminating manual reset requirement |
| Input Voltage Range | 2.5V to 80V - supports wide-input operation including 5V USB, 12V automotive, and 24V industrial rails |
Pinout & Package
Package: 8-Lead (2mm × 2mm) Plastic DFN with exposed pad (Pin 9 = GND, optional PCB connection). Thermal resistance θJA = 102°C/W enables reliable operation at full load in high-temperature environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ON | Active-low enable input | Drives GATE low when high; reduces supply current to 1.5µA and releases PWRGD pull-down during sleep mode |
| OUT | Output voltage sense reference | Connects to N-MOSFET source to establish GATE-to-OUT clamp (6V max), protecting MOSFET gate oxide |
| GATEP | P-channel MOSFET gate driver | Internally clamped to VIN – 5.8V; enables reverse-voltage protection with external P-MOSFET |
| GND | Device ground reference | Primary return path; exposed pad (Pin 9) must be connected to PCB ground plane for thermal and electrical integrity |
| PWRGD | Open-drain power-good status | Pulls low only after GATE > VGATE(TH) for ≥65ms; sinks up to 3mA for LED or logic interface |
| GATE | N-channel MOSFET gate driver | Provides 30mA fast pull-down and 10µA ramp-up; limits dV/dt to 3V/ms for controlled inrush current |
| SENSE | Current sense input | Monitors voltage drop across external sense resistor; trips on >50mV for >10µs to prevent MOSFET thermal runaway |
| IN | Main supply input | Withstands up to 80V DC/transient; overvoltage comparator referenced to this pin; absolute max rating = 85V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-MOSFET Drive (GATE + GATEP) | Enables simultaneous overvoltage protection (N-MOSFET) and reverse/negative voltage protection (P-MOSFET), eliminating need for separate protection ICs |
| No External TVS Required | Withstands 80V transients directly at IN pin due to robust input structure, reducing BOM count and board area in USB/adapter-fed devices |
| Adjustable Inrush Control | GATE ramp rate set by internal 10µA current source; external capacitor from GATE to GND allows precise dV/dt tuning for COUT up to 100µF |
| Thermal-Grade H-Specification | Rated for –40°C to +125°C operation with validated performance across full range, supporting automotive infotainment and industrial HMIs |
| Power-Good Timing Integrity | PWRGD assertion requires sustained GATE high condition (>65ms), preventing false assertions during transient-induced gate glitches |
Applications
| USB-C Power Delivery Protection | Automotive Infotainment Power Input |
|---|---|
Use Scenario: Protecting a tablet's USB-C port against misconnected 20V wall adapters or hot-plug transients. IC Role / Device Role / Timing Role: Overvoltage/overcurrent controller that gates power path via external N-MOSFET and asserts PWRGD only after stable output is confirmed. Use Value: Prevents damage from 20V plug-in overshoot (up to 40V measured) while maintaining <1µs response-no TVS or input capacitor required. | Use Scenario: Securing 12V battery-supplied infotainment head unit against load-dump spikes and reverse-battery connection. IC Role / Device Role / Timing Role: Dual-protection controller enabling both overvoltage shutdown (via GATE) and reverse-voltage blocking (via GATEP-driven P-MOSFET). Use Value: Withstands 80V transients and blocks –12V reverse polarity without external diodes or Zeners-reducing component count by 3+ parts. |
| Industrial Handheld Scanner | Medical Portable Monitor Power Input |
Use Scenario: Safeguarding a ruggedized barcode scanner powered from multiple sources (USB, cradle, external adapter). IC Role / Device Role / Timing Role: Fault-tolerant protection IC with auto-retry (LTC4361-2) ensuring continuous operation after accidental overcurrent events. Use Value: Eliminates system lockup during motor stall or short-circuit; recovers autonomously in ≤130ms without host intervention. | Use Scenario: Regulating clean 5V power to sensitive analog front-end circuitry in a battery-backed patient monitor. IC Role / Device Role / Timing Role: Precision overvoltage supervisor with 2% threshold accuracy and 65ms PWRGD delay ensuring stable rail before ADC initialization. Use Value: Guarantees no false power-good assertion during input settling; supports IEC 60601-1 compliance for medical device safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4361HDC-1#TRMPBF | Latch-off (non-recovering) behavior after overcurrent fault; no auto-retry | Suitable for safety-critical systems requiring manual reset after fault | Select LTC4361HDC-1#TRMPBF only if fail-safe latching is mandated and automatic recovery is prohibited |
| TPD3S014RTER | Integrated 5.5V-rated N-MOSFET; fixed 5.75V OV threshold; no GATEP or reverse-voltage support | Targeted at USB 2.0/3.0 data-line + VBUS protection; lacks high-voltage (80V) capability | Choose TPD3S014RTER only for cost-sensitive, low-voltage (≤6V), space-constrained USB ports where integrated FET suffices |
Compared with LTC4361HDC-1#TRMPBF, the LTC4361HDC-2#TRMPBF provides autonomous recovery from overcurrent faults-critical for unattended embedded systems-while retaining identical overvoltage response, thermal grade, and package. Versus TPD3S014RTER, it trades integration for flexibility: external MOSFET selection enables 80V tolerance, adjustable current limiting, and reverse-polarity blocking-essential for multi-rail industrial and automotive inputs.
Availability
LTC4361HDC-2#TRMPBF is available at Aetrix Electronics and suitable for USB-C power delivery protection, automotive infotainment power input, and industrial handheld scanner applications requiring stable component supply across extended temperature ranges.
Supply support for LTC4361HDC-2#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4361 family is engineered for robust input protection in portable and harsh-environment electronics, delivering precision overvoltage/overcurrent control with minimal external components and extended temperature operation.
FAQ
What is the overvoltage protection threshold of the LTC4361HDC-2#TRMPBF?
The LTC4361HDC-2#TRMPBF has a precisely trimmed overvoltage threshold of 5.8V ±2% (5.684V to 5.916V) at the IN pin, with 25–300mV hysteresis to prevent oscillation during slow voltage transitions. This specification is guaranteed over the full –40°C to +125°C operating range and enables reliable clamping without external resistive dividers or calibration.
Does the LTC4361HDC-2#TRMPBF require an external TVS diode for 80V transient protection?
No, the LTC4361HDC-2#TRMPBF does not require an external TVS diode for most 80V transient protection applications. Its IN pin is rated to withstand up to 85V absolute maximum and incorporates internal circuitry that safely absorbs energy from inductive cable transients-verified in typical applications with Si1470DH MOSFET and 0.7µH cable inductance per Analog Devices' Figure 7.
How does the LTC4361HDC-2#TRMPBF differ from the LTC4361HDC-1#TRMPBF?
The LTC4361HDC-2#TRMPBF implements auto-retry recovery after overcurrent faults-restarting after a fixed 130ms delay-whereas the LTC4361HDC-1#TRMPBF latches off permanently until IN drops below 2.1V or ON is pulsed high. Both share identical overvoltage response, thermal grade (–40°C to +125°C), package, and pinout.
What is the purpose of the GATEP pin on the LTC4361HDC-2#TRMPBF?
The GATEP pin on the LTC4361HDC-2#TRMPBF drives the gate of an external P-channel MOSFET to provide reverse-voltage and negative-input protection. Internally clamped to VIN – 5.8V and pulled down by a 2MΩ resistor, it enables blocking of –12V or –24V faults without additional Zener diodes or discrete protection circuits-extending system survivability in automotive and industrial environments.
Can the LTC4361HDC-2#TRMPBF operate with a 2.5V input supply?
Yes, the LTC4361HDC-2#TRMPBF operates with input supplies as low as 2.5V. Its undervoltage lockout activates below 1.8V (typical), and its gate drive remains functional down to 2.5V input-delivering ≥3.5V overdrive above OUT for logic-level N-MOSFETs. This enables compatibility with low-voltage USB OTG and battery-backed portable systems.
LTC4361HDC-2#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Handheld/Mobile Devices
- Current - Supply:
- 220µA
- Voltage - Supply:
- 2.5V ~ 80V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LTC4361HDC-2#TRMPBF FAQ
1.How can I place an order for LTC4361HDC-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4361HDC-2#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 LTC4361HDC-2#TRMPBF reliable?
The price and inventory of LTC4361HDC-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4361HDC-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4361HDC-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4361HDC-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4361HDC-2#TRMPBF?
LTC4361HDC-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4361HDC-2#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 LTC4361HDC-2#TRMPBF?
For technical support, including LTC4361HDC-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4361HDC-2#TRMPBF requirements.
6.How does Aetrix verify that LTC4361HDC-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4361HDC-2#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 LTC4361HDC-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4361HDC-2#TRMPBF?
All LTC4361HDC-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4361HDC-2#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 LTC4361HDC-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4361HDC-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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