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Analog Devices Inc. LTC4361ITS8-2#TRMPBF
- Part No.:
- LTC4361ITS8-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4361ITS8-2#TRMPBF.pdf
- Description:
- IC OVERVOLT PROT CONT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,584
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Product details
Overview
LTC4361ITS8-2#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 - enabling robust USB and wall-adapter input protection in smartphones and digital cameras.
For engineers reviewing the LTC4361ITS8-2#TRMPBF datasheet, LTC4361ITS8-2#TRMPBF pinout, LTC4361ITS8-2#TRMPBF application, or LTC4361ITS8-2#TRMPBF equivalent, key selection criteria include its –40°C to 85°C industrial temperature rating, TSOT-23-8 package, adjustable dV/dt inrush control, reverse voltage protection via GATEP, and PWRGD power-good monitoring with 65ms assertion delay.
Technical Context
The LTC4361ITS8-2#TRMPBF implements dual independent protection loops: a fast overvoltage comparator (5.8V threshold, 25–300mV hysteresis) triggering ≤10µs GATE pull-down, and an overcurrent comparator sensing ≥50mV across RSENSE for >10µs before initiating shutdown. Its internal charge pump ensures ≥4.5V gate drive above VOUT for logic-level N-MOSFETs, while GATE ramp rate is factory-set to ~3V/ms for controlled inrush limiting.
Unlike latch-off variants, the LTC4361ITS8-2#TRMPBF features auto-retry behavior after overcurrent events - restarting after a fixed 130ms delay - and supports negative input protection via GATEP-driven P-MOSFET. The PWRGD output asserts low only after GATE exceeds VGATE(TH) for ≥65ms, providing reliable power-good signaling synchronized to output stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Threshold | 5.8V ±2% - enables precise clamping against 5V rail overvoltage without external components |
| Overcurrent Threshold | 50mV ±10% - sets trip point for external sense resistor; supports 1.5A load with 25mΩ RSENSE |
| Overvoltage Turn-Off Delay | <10µs - isolates downstream circuitry before transient energy propagates |
| GATE Drive Strength | ≥30mA fast pull-down (C/I-grade), ≥4.5V overdrive - ensures rapid N-MOSFET turn-off and logic-level compatibility |
| Operating Temperature | –40°C to +85°C - qualified for industrial portable electronics including handheld computers and smart phones |
| Package | 8-Lead TSOT-23 - surface-mount footprint compatible with high-density PCB layouts and automated assembly |
| PWRGD Assertion Delay | 65ms after GATE > VGATE(TH) - guarantees stable output voltage before system power sequencing proceeds |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (2.9mm × 1.6mm × 0.8mm), exposed pad optional, RoHS-compliant, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ON | Active-low enable input | Drives GATE low and reduces supply current to 1.5µA when high; internal 5µA pull-down allows direct grounding or open-circuit use |
| OUT | Output voltage sense reference | Connects to N-MOSFET source to define GATE-to-VOUT clamp (6V max), ensuring safe gate drive under all conditions |
| GATEP | P-channel MOSFET gate driver | Internally clamped to VIN – 5.8V; pulls down via 2MΩ resistor - enables reverse-polarity protection without external bias |
| GND | Device ground reference | Common return for all internal circuits; no exposed pad connection required in TSOT-23 variant |
| PWRGD | Open-drain power-good status | Pulls low via MOSFET after 65ms GATE high period; 500kΩ internal pull-up to OUT supports LED indication or I/O interfacing |
| GATE | N-channel MOSFET gate driver | Charge-pump driven output with 3V/ms ramp rate; fast 30mA pull-down ensures sub-1µs fault response |
| SENSE | Current sense input | Detects voltage drop across external RSENSE; trips on ≥50mV for >10µs - immune to short-duration noise |
| IN | Main input supply connection | Withstands up to 80V transient; overvoltage detection occurs at IN pin - eliminates need for TVS diodes in most applications |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry overcurrent recovery | Resumes operation automatically after 130ms delay - avoids manual reset in battery-powered devices like MP3 players |
| No input capacitor or TVS required | 80V absolute max rating and fast turn-off eliminate need for external transient suppression in USB and adapter inputs |
| Adjustable dV/dt inrush control | GATE ramp rate fixed at ~3V/ms - limits peak inrush current to COUT × 3 mA/µF without external timing components |
| Reverse voltage protection | GATEP pin drives external P-MOSFET - blocks negative input voltages down to –15V without additional ICs or diodes |
| Power good monitoring | PWRGD asserts low only after stable GATE voltage and 65ms delay - prevents premature system wake-up during soft-start |
Applications
| USB Protection | Smartphone Power Input |
|---|---|
|
Use Scenario: Hot-plugging of incompatible wall adapters or USB chargers into mobile device ports. IC Role / Device Role / Timing Role: Overvoltage/overcurrent controller managing series N-MOSFET pass element and monitoring SENSE/IN pins. Use Value: Prevents damage from 20V+ transients (e.g., 20V wall adapter into 5V system) with <1µs shutdown and no TVS diode required. |
Use Scenario: Dual-input power management where USB and car charger may be connected simultaneously. IC Role / Device Role / Timing Role: Fault-isolation controller enforcing strict 5.8V OV threshold and 50mV OC trip with auto-retry behavior. Use Value: Enables safe concurrent input handling by blocking reverse current and rejecting overvoltage before system power-up. |
| Digital Camera Power Rail | Handheld Computer System Protection |
|
Use Scenario: High-capacitance load (e.g., 10µF decoupling) subjected to cable-induced inductive transients during hot-plug. IC Role / Device Role / Timing Role: Inrush-limited gate driver with 3V/ms GATE ramp and 130ms startup delay to absorb LC tank energy. Use Value: Limits peak inrush to <1.5A for 10µF output cap - avoids brownout and protects upstream DC/DC converters. |
Use Scenario: Industrial handheld computer operating across –40°C to +85°C ambient with multiple power sources. IC Role / Device Role / Timing Role: Industrial-grade protection IC controlling external Si1470DH N-MOSFET and providing PWRGD sequencing signal. Use Value: Ensures reliable power sequencing and fault recovery across full temperature range without derating or external compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD3S014RTER | Integrated 5.5V-rated switch with built-in TVS; no external MOSFET needed but limited to 5.5V max input | Targeted at USB 2.0 data-line + VBUS protection; lacks adjustable inrush control and industrial temp range | Choose for compact USB port protection where input voltage never exceeds 5.5V and board space is critical |
| MAX14523ATA+ | Fixed 6.1V OV threshold, 25mV OC threshold; no GATEP pin or reverse-voltage support | Designed for single-supply Li-ion charging paths; no PWRGD output or auto-retry mode | Prefer when only basic OV/OC protection is needed and negative input or power-good signaling is unnecessary |
Compared with TPD3S014RTER and MAX14523ATA+, the LTC4361ITS8-2#TRMPBF uniquely combines 80V transient tolerance, auto-retry recovery, reverse-voltage capability via GATEP, and precise 5.8V/50mV thresholds - making it optimal for ruggedized portable systems requiring flexible MOSFET selection and industrial temperature operation.
Availability
LTC4361ITS8-2#TRMPBF is available at Aetrix Electronics and suitable for USB protection, smartphone power input, and handheld computer system protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4361ITS8-2#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets.
The LTC4361ITS8-2#TRMPBF belongs to Analog Devices' LTC® overvoltage/overcurrent protection controller family, engineered specifically for portable electronics with multi-source power inputs and stringent reliability requirements.
FAQ
What is the overvoltage protection threshold of the LTC4361ITS8-2#TRMPBF?
The LTC4361ITS8-2#TRMPBF has a precisely trimmed 5.8V ±2% overvoltage threshold at the IN pin. This value is specified over the full –40°C to +85°C temperature range and triggers immediate GATE turn-off within <10µs when exceeded. The device also provides 25–300mV hysteresis to prevent oscillation during recovery, with a typical 5.7V release threshold.
How does the LTC4361ITS8-2#TRMPBF handle overcurrent events?
The LTC4361ITS8-2#TRMPBF detects overcurrent by monitoring the voltage across an external sense resistor connected between IN and SENSE. It trips when this voltage exceeds 50mV ±10% for longer than 10µs, then pulls GATE low to disable the external N-MOSFET. As the "-2" variant, it automatically retries after a fixed 130ms delay - unlike the latch-off "-1" version.
Does the LTC4361ITS8-2#TRMPBF require external components for basic overvoltage protection?
No, the LTC4361ITS8-2#TRMPBF requires no input capacitor or TVS diode for most applications due to its 80V absolute maximum input rating and <1µs overvoltage response time. Only three external components are essential: an N-channel MOSFET, a sense resistor (e.g., 25mΩ for 1.5A trip), and optional GATE-to-GND capacitor for slower ramp rates.
What is the function of the GATEP pin on the LTC4361ITS8-2#TRMPBF?
The GATEP pin on the LTC4361ITS8-2#TRMPBF drives an optional external P-channel MOSFET to provide reverse-voltage protection. Internally clamped to VIN – 5.8V and pulled down via a 2MΩ resistor, it turns on the P-MOSFET when VIN drops below the MOSFET's gate threshold - blocking negative input voltages without additional bias circuitry.
Can the LTC4361ITS8-2#TRMPBF operate with a 3.3V input supply?
Yes, the LTC4361ITS8-2#TRMPBF operates from 2.5V to 5.5V input supplies and maintains full functionality at 3.3V. Its internal charge pump delivers ≥4.5V gate drive above VOUT for logic-level N-MOSFETs even at 3V input, and all specifications - including 5.8V overvoltage threshold and 50mV overcurrent trip - remain valid across the entire supply range.
LTC4361ITS8-2#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:
- Handheld/Mobile Devices
- Current - Supply:
- 220µA
- Voltage - Supply:
- 2.5V ~ 80V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4361ITS8-2#TRMPBF FAQ
1.How can I place an order for LTC4361ITS8-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4361ITS8-2#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 LTC4361ITS8-2#TRMPBF reliable?
The price and inventory of LTC4361ITS8-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4361ITS8-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4361ITS8-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4361ITS8-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4361ITS8-2#TRMPBF?
LTC4361ITS8-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4361ITS8-2#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 LTC4361ITS8-2#TRMPBF?
For technical support, including LTC4361ITS8-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4361ITS8-2#TRMPBF requirements.
6.How does Aetrix verify that LTC4361ITS8-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4361ITS8-2#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 LTC4361ITS8-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4361ITS8-2#TRMPBF?
All LTC4361ITS8-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4361ITS8-2#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 LTC4361ITS8-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4361ITS8-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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