LTC4418IUF#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LTC4418IUF#PBF is a dual-channel prioritized power-path controller that automatically selects between two input supply sources based on adjustable voltage thresholds. It drives external P-channel MOSFETs to switch up to 2 power inputs with low dropout and precise threshold control. Ideal for redundant-power industrial systems, telecom equipment, and servers requiring seamless supply failover without interruption.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LTC4418IUF#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.9000(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC4418IUF#PBF?
- Dual-channel prioritized power-path selection with automatic failover from primary to secondary supply
- Adjustable input voltage thresholds via external resistors for flexible supply monitoring from 2.9 V to 36 V
- Drives external P-channel MOSFETs enabling high-current load switching with minimal on-state losses
- Active-low fault outputs and STATUS pins for system-level power monitoring and diagnostics
- Compact QFN-20 package with exposed pad for efficient thermal management in high-density designs
What is LTC4418IUF#PBF used for?
The LTC4418IUF#PBF is designed for redundant power systems that must switch seamlessly between a primary and backup supply, such as industrial servers, telecommunications infrastructure, and medical equipment where a supply interruption is unacceptable. Its adjustable threshold comparators allow designers to program exact switchover points for systems with 5 V, 12 V, or 24 V rails, ensuring the load always operates from the highest-priority valid supply. It is also used in battery backup units and UPS designs where an AC-derived supply is preferred over a battery but the transition must be glitch-free.
What are the specifications of LTC4418IUF#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1710 |
| YTEOL | 10 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LOAD SWITCH |
| JESD-30 Code | S-PQCC-N20 |
| JESD-609 Code | e3 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max (Vsup) | 40V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 12V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LTC4418IUF#PBF datasheet?
LTC4418IUF#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC4418IUF#PBF?
Compatible alternatives and drop-in replacements for LTC4418IUF#PBF:
suggested
suggested
Frequently Asked Questions
How does LTC4418IUF#PBF determine which of the two power inputs to connect to the load?
The LTC4418IUF#PBF uses two independent threshold comparators, each with adjustable overvoltage and undervoltage trip points set by external resistor dividers, to continuously monitor both input supplies. The device always activates the higher-priority valid channel (Channel 1) first; only when Channel 1 falls outside its valid window does it switch to Channel 2, ensuring the load receives power from the preferred source in systems with 5 V to 36 V rails.
What type and size of external FETs are required to handle high-current loads with LTC4418IUF#PBF?
LTC4418IUF#PBF drives external P-channel MOSFETs whose gate is pulled low to turn on each power path. The FET selection depends on load current — for a 5 A continuous load at 12 V, a MOSFET with RDS(on) below 30 mΩ and suitable gate threshold around -2 V to -4 V is recommended to minimize conduction losses below 150 mW. The controller's gate drive can handle FETs with up to several hundred nanofarads of gate capacitance.
In which redundant-power industrial applications is LTC4418IUF#PBF most commonly deployed?
The device is widely used in -48 V telecom rectifiers, 24 V industrial PLC backplanes, and server hot-swap shelves where two power feeds must share a common load without glitches. Medical imaging equipment that requires seamless transition from mains to battery backup within microseconds also employs this controller, as the LTC4418's crossover time is typically under 1 µs, preventing voltage droops that could reset downstream processors.
How does the LTC4418IUF#PBF fault reporting help system designers implement power diagnostics?
Each channel has a dedicated active-low FAULT output that asserts when the corresponding input supply is out of its programmed valid voltage window, allowing a host microcontroller or supervisory IC to log supply events or trigger alerts. The STATUS outputs indicate which channel is currently active, enabling real-time monitoring via GPIO pins on a system controller. This dual-fault plus dual-status interface supports 4-wire diagnostics without requiring additional voltage-monitoring ICs in 5 V or 12 V supply rails.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $9.4400 | $9.44 |
| 10+ | $6.3850 | $63.85 |
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