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Analog Devices Inc. LT4356MPMS-1#TRPBF
- Part No.:
- LT4356MPMS-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT4356MPMS-1#TRPBF.pdf
- Description:
- IC SURGE STOPPER ADJ 10-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:998
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Product details
Overview
LT4356MPMS-1#TRPBF from Analog Devices is a high-voltage surge stopper IC that protects downstream loads by regulating output voltage during overvoltage transients (e.g., automotive load dump) via external N-channel MOSFET gate control; features 4V–80V operating range, 50mV overcurrent sense threshold, –55°C to 125°C temperature rating, and 7µA shutdown current.
For engineers reviewing the LT4356MPMS-1#TRPBF datasheet, LT4356MPMS-1#TRPBF pinout, LT4356MPMS-1#TRPBF application, or LT4356MPMS-1#TRPBF equivalent, this page delivers verified functional identity, validated 10-pin MSOP package mapping, confirmed fault timer behavior, auxiliary amplifier use cases, and real-world surge protection design constraints - all traceable to Analog Devices' official LT4356MP-1 documentation.
Technical Context
The LT4356MPMS-1#TRPBF implements dual-fault protection: an overvoltage loop servoing the FB pin to 1.25V using a voltage amplifier, and an overcurrent loop limiting ΔVSNS to 50mV via a dedicated current-sense amplifier. Both faults trigger a VDS-dependent timer current charging the TMR pin.
Fault response is staged: FLT asserts low at VTMR = 1.25V (early warning), then GATE pulls low at VTMR = 1.35V (MOSFET turn-off); cooldown begins when VTMR falls to 0.5V, enabling automatic restart. The SHDN pin tolerates –60V to 100V and disables functional blocks except the auxiliary amplifier in LT4356MP-2 - but fully powers down in LT4356MP-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V - supports cold-crank automotive operation and withstands reverse battery up to –60V on VCC/SHDN. |
| Overcurrent Threshold | 50mV across SNS–VCC - sets precise current limit independent of supply voltage; enables accurate 10mΩ sense resistor use. |
| FB Servo Voltage | 1.25V ±15mV - defines regulated output clamp level via external resistive divider; stable over –55°C to 125°C. |
| Shutdown Current | 7µA max - ensures ultra-low power loss during system sleep; measured with SHDN ≤ 0.4V and IN+ = 1.3V. |
| GATE Drive Range | VOUT + 4.5V to VOUT + 16V - drives standard-threshold N-MOSFETs above 8V VCC; minimum 4.5V headroom at 4V VCC. |
| Fault Timer Thresholds | FLT active at 1.25V, GATE off at 1.35V, retry at 0.5V on TMR - enables programmable warning, shutdown, and auto-recovery timing. |
| AUX Amp Output Sink | 2mA @ 80V - allows direct LED/optocoupler interface without external transistor; negative input tied to internal 1.25V reference. |
Pinout & Package
LT4356MPMS-1#TRPBF is housed in a 10-lead plastic MSOP package (JEDEC MO-187AA), rated for –55°C to 125°C operation, with θJA = 160°C/W and lead-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Voltage regulator feedback input | Connects to center tap of output divider; servoed to 1.25V during overvoltage to clamp VOUT; clamped to 7V internally. |
| 2 OUT | Output voltage sense input | Senses source voltage of external N-MOSFET; triggers EN high-impedance when VOUT ≥ VCC – 0.7V. |
| 3 GATE | N-MOSFET gate drive output | Charge-pump-driven output clamped to VOUT + 14V max; pulls up/down to regulate VOUT or limit current. |
| 4 SNS | Current sense input | Monitors voltage drop between VCC and SNS; limits ΔVSNS to 50mV; tolerates –60V below GND if VCC–SNS ≤ 30V. |
| 5 VCC | Positive supply input | Primary power rail (4V–80V); withstands –60V reverse bias; supplies internal circuitry and charge pump. |
| 6 TMR | Fault timer capacitor connection | Capacitor to GND sets warning, fault, and cooldown timing; current scales with VCC–VOUT for SOA-optimized response. |
| 7 GND | Device ground reference | System return path for all internal circuits; must be low-impedance to minimize noise coupling into SNS/FB paths. |
| 8 EN | Open-collector enable output | High-impedance when MOSFET is fully on (VOUT ≥ VCC – 0.7V); latched until VOUT resets below 0.5V then rises >2V. |
| 9 FLT | Open-collector fault output | Pulls low at VTMR = 1.25V to signal impending shutdown; sinks up to 3mA from 80V for LED/optocoupler indication. |
| 10 SHDN | Shutdown control input | Pulled <0.4V to enter 7µA shutdown; floats to ~1.2V via internal current source; withstands –60V to 100V without damage. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output clamp voltage | Set via FB divider to any level ≥1.25V - enables flexible regulation (e.g., 12V, 24V, 27V systems) without changing IC. |
| VDS-dependent fault timer | Timer current scales with (VCC – VOUT) - shortens fault timeout under high stress, protecting MOSFET SOA during load dump. |
| Reverse input protection support | Enables back-to-back N-MOSFET configuration - eliminates Schottky diode forward drop, improving efficiency and cold-crank margin. |
| Integrated auxiliary amplifier | Open-collector AOUT + IN+ (SO only) - configurable as UVLO comparator or linear regulator controller driving external PNP. |
| Robust pin voltage ratings | VCC/SHDN tolerate –60V to 100V; SNS handles –60V to VCC+0.3V - simplifies transient-hardened PCB layout and ESD protection. |
Applications
| Automotive Load Dump Protection | Industrial Hot-Swap Power Supply |
|---|---|
|
Use Scenario: Protecting infotainment ECUs during 60V/200ms load dump events in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Surge stopper regulating output to 27V while dissipating transient energy in external MOSFET; fault timer provides 100ms+ ride-through before shutdown. Use Value: Enables uninterrupted operation during ISO 7637-2 Pulse 5a/b transients; avoids system reset or data loss in safety-critical modules. |
Use Scenario: Inserting powered blades into live backplanes in telecom or server chassis without disrupting upstream power rails. IC Role / Device Role / Timing Role: High-side switch controlling inrush current and blocking reverse current; SHDN enables controlled power sequencing. Use Value: Prevents bus voltage sag and arcing during insertion; reverse protection eliminates need for bulky Schottky diodes. |
| Battery-Powered System Overvoltage Guard | Intrinsic Safety Barrier Interface |
|
Use Scenario: Safeguarding Li-ion battery management systems against accidental connection to 48V industrial chargers. IC Role / Device Role / Timing Role: Clamp regulator limiting VOUT to 16.5V during 48V misconnection; overcurrent detection responds within 4µs. Use Value: Prevents catastrophic cell overcharge or thermal runaway; fast turn-off (<1µs) meets IEC 62368-1 fault containment requirements. |
Use Scenario: Isolating hazardous-area sensors (e.g., gas detectors) from safe-area controllers in petrochemical plants. IC Role / Device Role / Timing Role: Intrinsically safe power limiter using current-limited MOSFET pass element; auxiliary amplifier monitors barrier voltage. Use Value: Ensures energy delivered to field device stays below ignition thresholds per IEC 60079-11; 7µA shutdown enables low-power monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365IMS-1#TRPBF | Lower voltage range (2.5V–34V); integrated MOSFET; fixed 28.5V clamp; no auxiliary amplifier. | Better suited for low-voltage portable electronics; lacks programmable clamp and SOA-optimized timer. | Select when board space is critical and 34V max input suffices; avoid for 48V/80V automotive or industrial use. |
| TPS26631PWPR | 4.5V–60V range; integrated 80mΩ FET; fixed 32V overvoltage clamp; no VDS-dependent timer or auxiliary amp. | Targeted at USB PD and PoE-powered devices; simpler setup but less flexible for custom clamp levels or diagnostics. | Choose for cost-sensitive, high-volume consumer designs needing basic OVP; not suitable for load dump or precision regulation. |
Compared with LTC4365IMS-1#TRPBF and TPS26631PWPR, LT4356MPMS-1#TRPBF offers wider input range, field-programmable output clamping, MOSFET SOA-aware fault timing, and diagnostic flexibility via auxiliary amplifier - making it uniquely suited for demanding automotive and industrial transient protection where reliability and design adaptability are paramount.
Availability
LT4356MPMS-1#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial hot-swap power supplies, and battery-powered system overvoltage guard applications requiring stable component supply, long-term lifecycle assurance, and guaranteed –55°C to 125°C operation.
Supply support for LT4356MPMS-1#TRPBF 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and reliability-critical applications.
The LT4356MPMS-1#TRPBF belongs to the Linear Technology surge protection product line, designed specifically for robust, programmable overvoltage and overcurrent protection in harsh environments such as automotive, avionics, and industrial control systems.
FAQ
What is the maximum input voltage the LT4356MPMS-1#TRPBF can withstand without damage?
The LT4356MPMS-1#TRPBF supports continuous operation from 4V to 80V on VCC, and its VCC and SHDN pins are rated for –60V to 100V absolute maximum - meaning it survives reverse battery conditions and high-energy transients without latch-up or permanent damage. This rating is verified per Analog Devices' Absolute Maximum Ratings table and applies across the full –55°C to 125°C temperature range.
How does the LT4356MPMS-1#TRPBF implement overcurrent protection?
The LT4356MPMS-1#TRPBF monitors the voltage drop between VCC and SNS pins, using an internal amplifier to limit ΔVSNS to 50mV. When this threshold is exceeded, the GATE pin is actively regulated to maintain the limit, and a scaled current charges the TMR capacitor. At VTMR = 1.25V, FLT asserts; at 1.35V, GATE pulls low. This method ensures precise, temperature-stable current limiting independent of supply voltage.
Can the LT4356MPMS-1#TRPBF be used with P-channel MOSFETs?
No - the LT4356MPMS-1#TRPBF is designed exclusively for N-channel MOSFETs configured as high-side switches, with GATE driven relative to OUT. Its gate drive architecture, charge pump, and SNS sensing topology assume N-MOSFET source connection to OUT. Using a P-MOSFET would invert the control logic and violate the IC's internal current-sense polarity and voltage references.
What is the purpose of the auxiliary amplifier in the LT4356MPMS-1#TRPBF?
The auxiliary amplifier in the LT4356MPMS-1#TRPBF (accessible via AOUT and IN+ pins in SO packages; AOUT only in MSOP) provides a configurable building block: its negative input is tied to an internal 1.25V reference, and AOUT sinks up to 2mA. It can serve as a UVLO comparator (with external hysteresis) or as a linear regulator controller driving an external PNP pass transistor - adding system-level monitoring or backup regulation capability without extra ICs.
Does the LT4356MPMS-1#TRPBF support automatic recovery after a fault?
Yes - after a fault condition clears, the LT4356MPMS-1#TRPBF initiates cooldown: a 2µA current discharges the TMR capacitor until VTMR reaches 0.5V, at which point the internal charge pump pulls GATE high to re-enable the external MOSFET. This auto-restart behavior is inherent to the IC's timer architecture and requires no external reset signal or microcontroller intervention.
LT4356MPMS-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- 27V Adj
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LT4356MPMS-1#TRPBF FAQ
1.How can I place an order for LT4356MPMS-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT4356MPMS-1#TRPBF 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 LT4356MPMS-1#TRPBF reliable?
The price and inventory of LT4356MPMS-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT4356MPMS-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT4356MPMS-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT4356MPMS-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT4356MPMS-1#TRPBF?
LT4356MPMS-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT4356MPMS-1#TRPBF 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 LT4356MPMS-1#TRPBF?
For technical support, including LT4356MPMS-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT4356MPMS-1#TRPBF requirements.
6.How does Aetrix verify that LT4356MPMS-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT4356MPMS-1#TRPBF 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 LT4356MPMS-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT4356MPMS-1#TRPBF?
All LT4356MPMS-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT4356MPMS-1#TRPBF, 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 LT4356MPMS-1#TRPBF part is unused and in its original packaging.
Return procedure for LT4356MPMS-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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