LTC4418
RECOMMENDED FOR NEW DESIGNSDual Channel Prioritized PowerPath Controller
- Part Models
- 4
- 1ku List Price
- Starting From $3.73
Overview
- Selects Highest Priority Supply from Two Inputs
- Blocks Reverse and Cross Conduction Currents
- Wide Operating Voltage Range: 2.5V to 40V
- –42V Protection Against Reverse Connection
- 60V Tolerant V1, V2 Inputs
- Adjustable Input Validation Time
- Fast Switchover Minimizes Output Voltage Droop
- Low 26µA Operating Current
- ±1.5% Input Overvoltage/Undervoltage Protection
- Adjustable Overvoltage/Undervoltage Hysteresis
- Cascadable for Additional Input Supplies
- 20-Lead 4mm × 4mm QFN Package
The LTC4418 connects one of two valid power supplies to a common output based on priority and validity. Priority is defined by pin assignment, with V1 assigned the higher priority and V2 the lower priority. A power supply is defined as valid when its voltage has been within its overvoltage (OV) and undervoltage (UV) window continuously for at least the configured validation time. If the highest priority valid input falls out of the OV/UV window, the channel is immediately disconnected and the other valid input is connected to the common output. Multiple LTC4418s, as well as triple channel LTC4417s, can be cascaded to provide switchover between more than two inputs.
The LTC4418 incorporates fast non-overlap switching circuitry to prevent both reverse and cross conduction while minimizing output droop. The gate driver includes a 6V clamp to protect external MOSFETs. A controlled soft-start feature minimizes start-up inrush current. Open drain VALID outputs indicate the input supplies have been within their OV/UV window for the duration of the validation time. The validation time can be disabled or adjusted using an external capacitor
Applications
- Industrial Handheld Instruments
- High Availability Systems
- Battery Backup Systems
- Servers and Computer Peripherals
Documentation
Press Release 1
Book & eBook 1
Product Selection Guide 1
Brochure 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4418CUF#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4418CUF#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4418IUF#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC4418IUF#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC4418CUF#PBF | PRODUCTION | |
| LTC4418CUF#TRPBF | PRODUCTION | |
| LTC4418IUF#PBF | PRODUCTION | |
| LTC4418IUF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4418
LTC4418 PowerPath Controller Design Tool - BETA
Open Tool
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
FMC X-Microwave Compatible Level Translator and Power Supply Kit
Resources
LTC4418 Dual Channel Prioritized PowerPath Controller