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Analog Devices Inc. LTC4361HTS8-1#TRMPBF
- Part No.:
- LTC4361HTS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4361HTS8-1#TRMPBF.pdf
- Description:
- IC OVP/OCP PROTECTION CTLR 8TSOT
- Quantity:
- Payment:
- Shipping:
Inventory:920
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Product details
Overview
LTC4361HTS8-1#TRMPBF from Analog Devices is a high-temperature overvoltage/overcurrent protection controller for 2.5V–5.5V portable systems. It controls an external N-channel MOSFET to isolate downstream circuitry during transients up to 80V, features a 2% accurate 5.8V overvoltage threshold, 10% accurate 50mV overcurrent trip, and <1µs overvoltage turn-off - deployed in USB-powered handheld devices operating from –40°C to 125°C.
For engineers reviewing the LTC4361HTS8-1#TRMPBF datasheet, LTC4361HTS8-1#TRMPBF pinout, LTC4361HTS8-1#TRMPBF application, or LTC4361HTS8-1#TRMPBF equivalent, key selection criteria include latchoff behavior after overcurrent, TSOT-23 thermal performance at 125°C ambient, GATE drive capability for logic-level MOSFETs, and reverse voltage protection via GATEP-controlled P-channel device.
Technical Context
The LTC4361HTS8-1#TRMPBF implements dual independent protection loops: a fast overvoltage comparator (5.8V threshold with 25–300mV hysteresis) triggering ≤1µs GATE pull-down, and an overcurrent comparator monitoring SENSE–IN differential voltage ≥50mV for ≥10µs. Its internal charge pump delivers ≥4.5V gate drive above OUT for VIN ≥3V, enabling low-RDS(ON) N-MOSFETs without external boost.
Startup includes a 130ms delay before GATE ramp-up at 3V/ms, limiting inrush current; ON pin enables CMOS-compatible active-low control with 5µA internal pull-down. The H-grade variant supports continuous operation up to 125°C junction temperature with θJA = 195°C/W in the 8-lead TSOT-23 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overvoltage Threshold | 5.8V ±2% - precise clamping point for protecting 5V systems against wall adapter or hot-plug transients. |
| Overcurrent Threshold | 50mV ±10% - sets trip point across external sense resistor; enables accurate current limiting without calibration. |
| GATE Turn-Off Delay | <1µs - ensures sub-microsecond isolation of load during 80V input surges, preventing IC damage. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin, industrial edge, and ruggedized portable applications. |
| Input Voltage Range | 2.5V to 80V - supports wide-input DC power rails while protecting downstream 2.5–5.5V logic. |
| Supply Current (Active) | 220–400µA - ultra-low quiescent draw preserves battery life in always-on mobile protection circuits. |
| Protection Mode | Latchoff (LTC4361-1) - requires IN undervoltage or ON pin reset after overcurrent fault; prevents uncontrolled retries. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (ThinSOT™), 3mm × 3mm footprint, exposed pad optional, rated for 125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ON) | Enable Control Input | CMOS-compatible active-low enable; internal 5µA pull-down; drives GATE low when high to enter 1.5µA sleep mode. |
| 2 (OUT) | Output Sense Reference | Connects to N-MOSFET source; defines GATE-to-OUT clamp voltage (≥4.5V above OUT) and PWRGD reference. |
| 3 (GATEP) | P-Channel MOSFET Gate Driver | Internally clamped to 5.8V below IN; pulls down via 2MΩ resistor; enables reverse-voltage protection with external P-MOS. |
| 4 (GND) | Ground Reference | Primary return path for all internal comparators, drivers, and bias circuits; connects to PCB ground plane. |
| 5 (IN) | Main Supply Input | Accepts 2.5–80V input; hosts overvoltage comparator; withstands 85V absolute max; no TVS required in most designs. |
| 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; ramps at 3V/ms on startup; fast pull-down ≥30mA 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); sinks up to 3mA. |
Key Features
| Feature | Design Value |
|---|---|
| No external TVS required | Withstands 80V transients directly at IN pin due to robust input structure and fast GATE turn-off, reducing BOM count. |
| Adjustable dV/dt ramp-up | GATE slew rate fixed at 3V/ms by internal circuitry; external capacitor from GATE to GND enables slower ramp for lower inrush. |
| Reverse voltage protection | GATEP pin drives external P-channel MOSFET to block negative input voltages down to –BVDSS of the P-MOS. |
| Gentle shutdown | When ON goes high, GATE is pulled low with weak 40µA current to minimize input voltage transients during disable. |
| Power Good monitoring | PWRGD provides system-level status with 65ms delay after GATE reaches threshold, enabling sequenced power-up of downstream ICs. |
Applications
| USB Protection | Smartphone Power Input |
|---|---|
Use Scenario: Preventing damage from misconnected 12V/20V wall adapters into 5V USB ports on smartphones. IC Role / Device Role / Timing Role: Primary overvoltage guard controlling series N-MOSFET; latches off after overcurrent to prevent repeated stress. Use Value: Eliminates need for TVS diodes and reduces risk of permanent failure during accidental hot-plug events. |
Use Scenario: Safeguarding baseband processor and PMIC during simultaneous charging from USB and car adapter inputs. IC Role / Device Role / Timing Role: Input supervisor enforcing strict 5.8V OV threshold and providing PWRGD sequencing signal. Use Value: Enables reliable dual-input power architecture without compromising 125°C thermal margin in compact form factor. |
| Digital Camera Power Management | MP3/MP4 Player Protection |
Use Scenario: Protecting image sensor and flash LED driver ICs from 24V transients induced by ESD or cable inductance. IC Role / Device Role / Timing Role: Fast-acting series switch controller with <1µs response; uses GATEP to add reverse polarity blocking. Use Value: Maintains clean 3.3V rail integrity during hot-swap operations and extends product lifetime in field use. |
Use Scenario: Securing audio codec and NAND flash from overvoltage during battery charging via multiple AC adaptors. IC Role / Device Role / Timing Role: Latchoff-mode protector (LTC4361-1) ensuring system remains powered down until manual reset after fault. Use Value: Prevents data corruption and memory write errors caused by unstable supply during overcurrent conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4361ITS8-1#TRMPBF | Same functionality and pinout; rated for –40°C to 85°C instead of –40°C to 125°C. | Suitable for consumer-grade portable devices without extended temperature requirements. | Select LTC4361HTS8-1#TRMPBF when operating ambient exceeds 85°C or junction temperature must remain within spec under sustained load. |
| TPD4S012DRBR | Integrated USB port protector with ESD + OV + OC; no external MOSFET needed; fixed 5.5V OV threshold. | Targets USB 2.0 data + power lines; lacks adjustable ramp, latchoff control, or GATEP reverse protection. | Choose LTC4361HTS8-1#TRMPBF for custom high-current (>1.5A), high-voltage (>5.5V), or reverse-polarity hardened designs. |
Compared with LTC4361ITS8-1#TRMPBF, the LTC4361HTS8-1#TRMPBF delivers guaranteed operation at 125°C ambient - critical for enclosed automotive or industrial enclosures - while retaining identical protection thresholds and timing. Versus TPD4S012DRBR, it offers full design flexibility with external MOSFET selection, programmable inrush control, and true bidirectional reverse-voltage blocking.
Availability
LTC4361HTS8-1#TRMPBF is available at Aetrix Electronics and suitable for USB protection, smartphone power input, digital camera power management, and MP3/MP4 player protection requiring stable component supply across extended temperature ranges.
Supply support for LTC4361HTS8-1#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LTC4361 family is designed specifically for robust input protection in portable electronics with multiple power sources - delivering precise, fast, and configurable overvoltage/overcurrent safeguarding without external TVS diodes.
FAQ
What is the overvoltage protection threshold of the LTC4361HTS8-1#TRMPBF?
The LTC4361HTS8-1#TRMPBF has a precisely trimmed 5.8V overvoltage threshold with ±2% accuracy across its –40°C to 125°C operating range. This value is specified as VIN(OV) in the Electrical Characteristics table and triggers immediate GATE turn-off when the IN pin voltage exceeds this level, isolating downstream circuitry from harmful transients.
Does the LTC4361HTS8-1#TRMPBF require an external TVS diode for 80V transient protection?
No, the LTC4361HTS8-1#TRMPBF does not require an external TVS diode for most 80V transient protection applications. Its IN pin is rated to 85V absolute maximum and incorporates fast (<1µs) internal response, allowing it to absorb and manage transients up to 80V using only an external N-channel MOSFET and sense resistor - verified in typical application circuits like Figure 5 and Figure 9 of the datasheet.
How does the LTC4361HTS8-1#TRMPBF differ from the LTC4361CTS8-1#TRMPBF?
The LTC4361HTS8-1#TRMPBF is the high-temperature grade variant rated for –40°C to +125°C operation, whereas the LTC4361CTS8-1#TRMPBF is specified only from 0°C to +70°C. Both share identical electrical specifications, pinout, and functionality; the H-grade ensures reliable performance in automotive, industrial, or thermally constrained portable environments where ambient temperatures exceed 70°C.
What is the purpose of the GATEP pin on the LTC4361HTS8-1#TRMPBF?
The GATEP pin on the LTC4361HTS8-1#TRMPBF drives an external P-channel MOSFET to provide reverse-voltage protection. Internally clamped to 5.8V below IN and pulled down via a 2MΩ resistor, GATEP enables the P-MOS to block negative input voltages - a capability absent in basic N-MOS-only configurations and essential for systems exposed to accidental polarity reversal.
What happens after an overcurrent event on the LTC4361HTS8-1#TRMPBF?
After an overcurrent event, the LTC4361HTS8-1#TRMPBF (being the "-1" variant) enters a latched-off state: GATE is held low, PWRGD releases, and the device remains disabled until reset by cycling IN below 2.1V (UVLO) or driving ON above 1.5V for >500µs. This prevents automatic retry attempts that could stress the MOSFET or load during persistent fault conditions.
LTC4361HTS8-1#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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4361HTS8-1#TRMPBF FAQ
1.How can I place an order for LTC4361HTS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4361HTS8-1#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 LTC4361HTS8-1#TRMPBF reliable?
The price and inventory of LTC4361HTS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4361HTS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4361HTS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4361HTS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4361HTS8-1#TRMPBF?
LTC4361HTS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4361HTS8-1#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 LTC4361HTS8-1#TRMPBF?
For technical support, including LTC4361HTS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4361HTS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4361HTS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4361HTS8-1#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 LTC4361HTS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4361HTS8-1#TRMPBF?
All LTC4361HTS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4361HTS8-1#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 LTC4361HTS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4361HTS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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