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Analog Devices Inc. LTC4361HDC-1#TRMPBF
- Part No.:
- LTC4361HDC-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4361HDC-1#TRMPBF.pdf
- Description:
- IC OVP/OCP PROTECTION CTLR 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,206
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Product details
Overview
LTC4361HDC-1#TRMPBF from Analog Devices is an overvoltage/overcurrent protection controller designed to safeguard 2.5V–5.5V portable systems against input transients up to 80V. It controls an external N-channel MOSFET, features a 5.8V ±2% overvoltage threshold, 50mV ±10% overcurrent trip, and <1µs overvoltage turn-off. It is used in USB-powered handheld devices requiring robust hot-plug and adapter-mix protection.
For engineers reviewing the LTC4361HDC-1#TRMPBF datasheet, LTC4361HDC-1#TRMPBF pinout, LTC4361HDC-1#TRMPBF application, or LTC4361HDC-1#TRMPBF equivalent, key selection criteria include latchoff behavior after overcurrent, –40°C to 125°C operating range, DFN (2mm × 2mm) package with exposed pad, and compatibility with logic-level N-MOSFETs for low RDS(ON) power path design.
Technical Context
The LTC4361HDC-1#TRMPBF implements dual-threshold overvoltage protection with 5.8V trip and 5.7V recovery (25–300mV hysteresis), enabling fast isolation and controlled restart. Its GATE driver delivers ≥4.5V gate overdrive above OUT for VIN ≥3V and includes a 3V/ms ramp-up circuit to limit inrush current.
It integrates a 50mV overcurrent comparator with 10µs glitch filter, ON-pin–controlled low-power sleep mode (1.5µA), and PWRGD open-drain output with 65ms delay after GATE exceeds VGATE(TH). The GATEP pin supports optional P-channel MOSFET for reverse-voltage protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Threshold | 5.8V ±2% - enables precise clamping before downstream ICs exceed absolute max ratings |
| Overcurrent Threshold | 50mV ±10% - sets trip point across sense resistor for accurate current limiting without calibration |
| Overvoltage Turn-Off Delay | <1µs - isolates load before transient energy propagates into protected circuitry |
| Operating Temperature | –40°C to +125°C - supports automotive under-hood and industrial edge applications |
| GATE Drive Capability | ≥4.5V above OUT (VIN ≥3V) - ensures full enhancement of logic-level N-MOSFETs at system VIN |
| PWRGD Assertion Delay | 65ms after GATE > VGATE(TH) - provides stable power-good signal only after output voltage settles |
| Supply Current (Active) | 220–400µA - enables low-quiescent operation in battery-backed portable systems |
Pinout & Package
Package: 8-Lead (2mm × 2mm) Plastic DFN with exposed pad (GND); thermal resistance θJA = 102°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ON) | Enable control input | CMOS-compatible active-low input; internal 5µA pull-down; drives GATE low when high to enter 1.5µA sleep mode |
| 2 (OUT) | Output voltage sense reference | Connects to source of external N-MOSFET; defines GATE-to-OUT clamp (6V max) and PWRGD reference |
| 3 (GATEP) | P-channel MOSFET gate drive | Internally clamped to 5.8V below IN; 2MΩ pull-down to GND; enables negative voltage protection |
| 4 (GND) | Ground reference | Primary ground node; exposed pad is electrically connected to GND and must be soldered for thermal performance |
| 5 (IN) | Main supply input | Withstands –0.3V to 85V; hosts 5.8V overvoltage comparator; senses input for UVLO (2.1V) and OV events |
| 6 (SENSE) | Current sense input | Monitors voltage drop across external sense resistor; trips overcurrent when IN–SENSE ≥50mV for ≥10µs |
| 7 (GATE) | N-channel MOSFET gate driver | Charge-pump–driven output; 3V/ms ramp rate; fast 30mA pull-down for <1µs turn-off; clamped to 6V above OUT |
| 8 (PWRGD) | Power good status output | Open-drain output with 500kΩ pull-up to OUT; asserts low 65ms after GATE exceeds VGATE(TH) ≈6.3–7.2V |
Key Features
| Feature | Design Value |
|---|---|
| Latchoff overcurrent response | LTC4361HDC-1#TRMPBF remains off after overcurrent until reset via IN <2.1V or ON >1.5V - prevents uncontrolled cycling during sustained fault |
| No external TVS required for ≤80V transients | Internal architecture absorbs inductive cable energy using MOSFET avalanche and load capacitance - reduces BOM count and board space |
| Adjustable dV/dt inrush control | GATE ramp rate set by internal 3V/ms or external capacitor (CG = 10µA × COUT/IINRUSH) - eliminates need for soft-start ICs or complex RC networks |
| Reverse voltage protection support | GATEP pin drives external P-MOSFET with 5.8V VGS clamp - blocks negative inputs down to –BVDSS of selected P-FET |
| Power good monitoring with delay | PWRGD asserts only after GATE stabilizes above VGATE(TH) for 65ms - avoids false assertions during startup overshoot or load transients |
Applications
| USB Protection | Handheld Computers |
|---|---|
|
Use Scenario: Hot-plugging mismatched wall adapters (e.g., 20V into 5V USB port) while USB bus remains live. IC Role / Device Role / Timing Role: Overvoltage/overcurrent controller that isolates downstream SoC and PMIC within 1µs of 5.8V breach. Use Value: Prevents permanent damage to 28nm/16nm application processors and USB PHYs rated for ≤6.0V absolute max. |
Use Scenario: Multi-source power input (USB, car charger, AC adapter) in ruggedized tablets deployed in field service. IC Role / Device Role / Timing Role: Front-end protection controller enforcing strict 5.8V OV threshold and latchoff fault handling. Use Value: Eliminates need for redundant TVS diodes and enables single-board design across global power standards. |
| Cell/Smart Phones | Digital Cameras |
|
Use Scenario: Simultaneous charging via USB-C PD and legacy 5V adapter during firmware update, risking voltage conflict. IC Role / Device Role / Timing Role: Input supervisor managing N-MOSFET pass element and asserting PWRGD only after stable 5V rail establishment. Use Value: Guarantees clean power sequencing to image sensor ISP and baseband modem, avoiding brownout resets. |
Use Scenario: High-current burst mode operation (e.g., flash charging, video encode) causing momentary overcurrent on 5V rail. IC Role / Device Role / Timing Role: Fast-acting current limiter using 50mV SENSE threshold and 10µs filtering to distinguish fault from transient load surge. Use Value: Maintains camera uptime during critical capture windows by avoiding nuisance shutdowns from motor or flash loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel ESD protector (IEC 61000-4-2), no OV/OC control, no MOSFET drive, no PWRGD | Only for board-level ESD suppression - cannot replace LTC4361HDC-1#TRMPBF in power path supervision | Select only for secondary I/O line protection; not a functional alternative for front-end power supervision |
| MAX14749ETA+T | 5.5V OV threshold (±1.5%), auto-retry OC response, 125°C max ambient, TDFN-8 (2mm × 2mm) | Auto-retry behavior differs from LTC4361HDC-1#TRMPBF's latchoff; lacks GATEP for reverse-voltage protection | Prefer where automatic recovery is required; avoid if latchoff is mandated for safety-critical fault containment |
Compared with LTC4361HDC-1#TRMPBF, TPD2E001DRYR offers no power path control capability, while MAX14749ETA+T provides similar packaging and temperature rating but substitutes auto-retry for latchoff and omits reverse-voltage support - making LTC4361HDC-1#TRMPBF uniquely suited for fail-safe, multi-protection portable power rails.
Availability
LTC4361HDC-1#TRMPBF is available at Aetrix Electronics and suitable for USB protection, handheld computers, and cell/smart phones requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4361HDC-1#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 consumer markets.
The LTC4361 family is designed specifically for robust input protection in portable electronics with multiple power sources - delivering integrated OV/OC supervision, MOSFET gate drive, and power-good signaling in miniature DFN/TSOT packages.
FAQ
What is the overvoltage protection threshold of the LTC4361HDC-1#TRMPBF?
The LTC4361HDC-1#TRMPBF has a precisely trimmed 5.8V overvoltage threshold with ±2% accuracy over its –40°C to +125°C operating range. This threshold triggers immediate GATE turn-off within <1µs when the IN pin voltage exceeds 5.8V, protecting downstream 2.5V–5.5V circuitry from transient or DC overvoltage events up to 80V.
How does the LTC4361HDC-1#TRMPBF handle overcurrent faults?
The LTC4361HDC-1#TRMPBF uses a 50mV ±10% overcurrent threshold referenced to the SENSE pin, with a 10µs glitch filter to reject noise. Upon detection, it pulls GATE low and latches off - remaining disabled until reset by cycling IN below 2.1V or driving ON above 1.5V for >500µs. This latchoff behavior distinguishes it from auto-retry variants like the LTC4361-2.
What package type and thermal characteristics does the LTC4361HDC-1#TRMPBF use?
The LTC4361HDC-1#TRMPBF is housed in an 8-lead (2mm × 2mm) plastic DFN package with exposed thermal pad. Its junction-to-ambient thermal resistance is θJA = 102°C/W, enabling reliable operation at full load across the –40°C to +125°C temperature range when the exposed pad is properly soldered to a thermal plane.
Does the LTC4361HDC-1#TRMPBF support reverse voltage protection?
Yes - the LTC4361HDC-1#TRMPBF supports reverse voltage protection via its GATEP pin, which drives an external P-channel MOSFET. GATEP is internally clamped to 5.8V below IN and includes a 2MΩ pull-down to GND, enabling safe blocking of negative input voltages down to the BVDSS rating of the selected P-MOSFET.
What is the function of the PWRGD pin on the LTC4361HDC-1#TRMPBF?
The PWRGD pin on the LTC4361HDC-1#TRMPBF is an open-drain power-good output with internal 500kΩ pull-up to OUT. It asserts low 65ms after GATE voltage exceeds VGATE(TH) (6.3–7.2V depending on VIN), providing a validated "rail stable" signal for sequencers or microcontrollers - ensuring downstream logic only activates after output voltage settles.
LTC4361HDC-1#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-1#TRMPBF FAQ
1.How can I place an order for LTC4361HDC-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4361HDC-1#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-1#TRMPBF reliable?
The price and inventory of LTC4361HDC-1#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-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4361HDC-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4361HDC-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4361HDC-1#TRMPBF?
LTC4361HDC-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4361HDC-1#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-1#TRMPBF?
For technical support, including LTC4361HDC-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4361HDC-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4361HDC-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4361HDC-1#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-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4361HDC-1#TRMPBF?
All LTC4361HDC-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4361HDC-1#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-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4361HDC-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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