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Analog Devices Inc. LT4356IMS-3#TRPBF
- Part No.:
- LT4356IMS-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT4356IMS-3#TRPBF.pdf
- Description:
- IC SURGE STOPPER ADJ 10-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,368
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Product details
Overview
LT4356IMS-3#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) and limiting current via external N-channel MOSFET gate control. It operates from 4V to 80V, features 50mV overcurrent sense threshold, 1.25V FB reference, and latches off after fault timer expiration. Used in automotive power distribution and hot-swap systems.
For engineers reviewing the LT4356IMS-3#TRPBF datasheet, LT4356IMS-3#TRPBF pinout, LT4356IMS-3#TRPBF application, or LT4356IMS-3#TRPBF equivalent, key selection criteria include its adjustable clamp voltage via FB divider, reverse input protection to –60V, 7µA shutdown current, AEC-Q100 qualification for industrial/automotive use, and MSOP-10 package compatibility with thermal constraints in high-reliability power rails.
Technical Context
The LT4356IMS-3#TRPBF implements dual-fault protection: overvoltage regulation via servo-controlled GATE drive maintaining 1.25V at FB, and overcurrent limiting by clamping ΔVSNS = VCC – VSNS to 50mV. Fault timing is dynamically scaled by (VCC – VOUT), enabling SOA-optimized MOSFET stress management.
It integrates an auxiliary amplifier (IN+/AOUT) configurable as level-detection comparator or linear regulator controller, plus open-collector FLT and EN outputs rated for 80V sink capability. Shutdown logic requires SHDN < 0.4V for 100µs followed by >2.1V transition at >10V/ms to reset latched-off state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4V to 80V operating; withstands –60V reverse input on VCC/SHDN/SNS |
| Overcurrent Threshold | 50mV sense voltage limit (ΔVSNS), enabling precise current limiting with external shunt |
| FB Reference Voltage | 1.25V ±25mV over temperature, sets regulated output clamp via resistive divider |
| Shutdown Current | 7µA max at TA = –40°C to 85°C, enabling ultra-low-power system standby |
| Package | 10-Lead Plastic MSOP, 0.65mm pitch, exposed pad optional for thermal enhancement |
| Temperature Range | –40°C to +85°C (I-grade), qualified per AEC-Q100 Grade 3 for automotive use |
| GATE Drive Capability | Pull-down current ≥4mA during overcurrent, ≥75mA during overvoltage for fast MOSFET turn-off |
Pinout & Package
LT4356IMS-3#TRPBF is housed in a 10-Lead Plastic MSOP package (3mm × 3mm, 0.65mm pitch) with exposed pad (not electrically connected). Pin 1 is bottom-left corner when marking side faces up and notch/pin 1 indicator is left-aligned.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Voltage regulator feedback input | Connects to center tap of output divider; 1.25V internal reference enables adjustable output clamp |
| OUT | Output voltage sense node | Senses MOSFET source voltage; triggers EN latch and TMR charging based on (VCC – VOUT) |
| GATE | N-channel MOSFET gate driver output | Charge-pump-driven output clamped to VOUT + 10V–16V; controls pass transistor conduction |
| SNS | Current sense input | Monitors voltage drop across external shunt; initiates overcurrent protection at 50mV |
| VCC | Main supply input | 4V–80V operation; withstands –60V reverse bias; powers internal circuitry and charge pump |
| TMR | Fault timer capacitor connection | Capacitor to ground sets dynamic fault delay; current scales with (VCC – VOUT) for SOA optimization |
| GND | Device ground reference | Common return for all analog and digital blocks; exposed pad may be tied to PCB GND |
| EN | Open-collector enable output | High-impedance when MOSFET fully on (VOUT > VCC – 0.7V); latched until OUT resets |
| FLT | Open-collector fault indicator | Pulls low at VTMR = 1.25V (early warning); remains low until SHDN reset sequence executed |
| SHDN | Shutdown control input | TTL-compatible input; pulls device into <7µA mode; withstands –60V to +100V without damage |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic fault timer | Charging current scales with (VCC – VOUT) - ensures MOSFET stays within SOA during transients |
| Reverse input protection | Withstands –60V on VCC, SHDN, SNS pins - eliminates need for external series diode in battery inputs |
| Auxiliary amplifier | IN+/AOUT pair with 1.25V internal reference - supports voltage monitoring or PNP-based linear regulation |
| Latched fault response | GATE remains off after timeout until explicit SHDN reset - prevents uncontrolled restart during persistent faults |
| AEC-Q100 qualification | I-grade (–40°C to +85°C) version meets automotive reliability standards - suitable for engine bay and ADAS power rails |
Applications
| Automotive Load Dump Protection | Industrial Hot-Swap Power Distribution |
|---|---|
Use Scenario: 12V/24V vehicle electrical system subjected to ISO 16750-2 load dump transients (up to 60V, 200ms). IC Role / Device Role / Timing Role: Surge stopper regulating output to safe clamp voltage while controlling external N-MOSFET gate; fault timer provides 10–100ms ride-through before latching off. Use Value: Enables uninterrupted ECU operation during transient; eliminates need for bulky TVS diodes or Zener clamps at input. |
Use Scenario: Backplane power rail in programmable logic controller (PLC) where modules are inserted/removed under power. IC Role / Device Role / Timing Role: High-side switch with controlled turn-on/turn-off slew rate; overcurrent limiting prevents bus collapse during short-circuit insertion. Use Value: Prevents arcing and voltage droop during live insertion; supports IEEE 1603 compliance for hot-swap systems. |
| Battery-Powered System Reverse Polarity Protection | Redundant Power Supply OR-ing Control |
Use Scenario: Portable medical device powered by removable Li-ion battery packs prone to accidental reverse connection. IC Role / Device Role / Timing Role: Controls back-to-back N-MOSFETs as ideal diode replacement; leverages –60V input tolerance to block reverse current without Schottky losses. Use Value: Reduces forward voltage drop from ~0.3V (Schottky) to <50mV, extending runtime and reducing heat in compact enclosures. |
Use Scenario: Dual-input 24V DC power system where two supplies feed common load with automatic failover. IC Role / Device Role / Timing Role: Acts as intelligent OR-ing controller using GATE to modulate MOSFET conduction; FLT signals loss of primary supply. Use Value: Eliminates cross-conduction and circulating currents; enables seamless switchover with <100µs interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365IMS-3#TRPBF | Lower 3.5V–34V supply range; integrated 42V MOSFET driver; no auxiliary amplifier | Better suited for low-voltage embedded systems; lacks AOUT/IN+ flexibility for custom monitoring | Select when input voltage stays below 34V and auxiliary functions are unnecessary |
| TPS26631RGER | Fixed 28V overvoltage clamp; no adjustable FB; integrated 100V MOSFET; no reverse input rating | Designed for USB PD and PoE applications; lacks –60V reverse tolerance and dynamic timer scaling | Select for cost-sensitive, fixed-clamp designs where reverse polarity risk is mitigated externally |
Compared with LTC4365IMS-3#TRPBF and TPS26631RGER, LT4356IMS-3#TRPBF offers wider 4V–80V operation, programmable clamp voltage, –60V reverse input capability, and SOA-optimized dynamic fault timing - making it uniquely suitable for harsh automotive and industrial 24V/48V systems requiring field-proven reliability.
Availability
LT4356IMS-3#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial hot-swap power distribution, and battery-powered reverse polarity protection requiring stable component supply and long-term lifecycle support.
Supply support for LT4356IMS-3#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets.
The LT4356 family is designed specifically for high-reliability power path protection in demanding environments - delivering robust surge suppression, precise current limiting, and fault-aware MOSFET control for automotive and industrial power systems.
FAQ
What is the maximum input voltage the LT4356IMS-3#TRPBF can withstand without damage?
The LT4356IMS-3#TRPBF supports continuous operation from 4V to 80V on VCC and tolerates –60V reverse bias on VCC, SHDN, and SNS pins. Absolute maximum ratings allow VCC and SHDN to swing from –60V to +100V, enabling direct connection to automotive battery rails without external protection diodes. This specification is validated per AEC-Q100 stress testing protocols.
How does the LT4356IMS-3#TRPBF implement overcurrent protection?
The LT4356IMS-3#TRPBF monitors the voltage difference between VCC and SNS pins, limiting ΔVSNS to 50mV via active GATE control. When this threshold is exceeded, an internal current source charges the TMR capacitor at a rate proportional to (VCC – VOUT), triggering FLT at 1.25V and latching GATE off at 1.35V. The 50mV threshold enables accurate current limiting with standard shunt resistors.
Can the LT4356IMS-3#TRPBF be used with back-to-back N-channel MOSFETs for reverse polarity protection?
Yes - the LT4356IMS-3#TRPBF supports back-to-back N-MOSFET configurations by driving both gates synchronously via its GATE output. Its –60V reverse input rating on VCC and SHDN pins allows direct connection to reversed battery inputs, eliminating Schottky diodes and reducing forward drop from ~0.3V to <50mV. This configuration is explicitly validated in Analog Devices' application notes.
What is required to reset the LT4356IMS-3#TRPBF after a latched fault condition?
To reset the LT4356IMS-3#TRPBF after GATE latches off, pull SHDN low to <0.4V for ≥100µs, then raise it above 2.1V with a slew rate >10V/ms. This sequence clears the internal fault latch and re-enables GATE drive. The TMR capacitor must discharge to <0.5V (typical discharge time ~45ms with 100nF) before successful restart - verified in Rev F datasheet Figure 11.
Does the LT4356IMS-3#TRPBF include an auxiliary amplifier, and how is it used?
Yes - the LT4356IMS-3#TRPBF includes an auxiliary amplifier with IN+ input and open-collector AOUT output, referenced to an internal 1.25V bandgap. It can be configured as a voltage comparator (e.g., undervoltage lockout) or as a linear regulator controller driving an external PNP pass transistor. AOUT sinks up to 2mA, supporting direct LED or optocoupler interfacing without additional components.
LT4356IMS-3#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
LT4356IMS-3#TRPBF FAQ
1.How can I place an order for LT4356IMS-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT4356IMS-3#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 LT4356IMS-3#TRPBF reliable?
The price and inventory of LT4356IMS-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT4356IMS-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT4356IMS-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT4356IMS-3#TRPBF transactions.
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4.How is shipping managed for LT4356IMS-3#TRPBF?
LT4356IMS-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT4356IMS-3#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 LT4356IMS-3#TRPBF?
For technical support, including LT4356IMS-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT4356IMS-3#TRPBF requirements.
6.How does Aetrix verify that LT4356IMS-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT4356IMS-3#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 LT4356IMS-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT4356IMS-3#TRPBF?
All LT4356IMS-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT4356IMS-3#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 LT4356IMS-3#TRPBF part is unused and in its original packaging.
Return procedure for LT4356IMS-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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