LTC4418IUF#TRPBF
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Analog Devices Inc. LTC4418IUF#TRPBF

Manufacturer No:
LTC4418IUF#TRPBF
Manufacturer:
Analog Devices Inc.
Package:
Tape & Reel (TR)
Description:
IC CTRLR DUAL PWRPATH 20QFN
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The LTC4418IUF#TRPBF, produced by Analog Devices Inc., is a dual-channel prioritized PowerPath controller. This component is designed to connect one of two valid power supplies to a common output based on priority and validity. The priority is defined by pin assignment, with V1 assigned the higher priority and V2 the lower priority. The LTC4418 ensures seamless switchover between power supplies, preventing both reverse and cross conduction while minimizing output droop. It is particularly useful in systems requiring reliable and efficient power management.

Key Specifications

ParameterConditionsMinTypMaxUnits
Supply Voltage40V
Operating Temperature-4085°C
Supply Current52µA
Package Type20-WFQFN Exposed Pad
FET TypeP-Channel
Validation Time3.5µs (Fast Mode)16ms/nF

Key Features

  • Dual-channel prioritized PowerPath controller with fast non-overlap switching to prevent reverse and cross conduction.
  • Internally generated 3.3V rail (INTVCC) for internal circuit power.
  • Validation timers for each channel, configurable via an external capacitor.
  • Overvoltage (OV) and undervoltage (UV) comparators for input supply validation.
  • Gate driver with a 6V clamp to protect external MOSFETs.
  • Soft-start capability to minimize output droop during switchover.
  • Cascadable with other LTC4418s or LTC4417s for multiple input switchover.

Applications

The LTC4418IUF#TRPBF is suitable for various industrial and power management applications, including:

  • Redundant power supply systems.
  • Hot swap controllers.
  • Power-over-Ethernet (PoE) systems.
  • High-reliability power distribution systems.
  • Systems requiring automatic switchover between power sources.

Q & A

  1. What is the primary function of the LTC4418IUF#TRPBF?
    The primary function is to connect one of two valid power supplies to a common output based on priority and validity.
  2. How are the priorities of the power supplies defined?
    Priorities are defined by pin assignment, with V1 having higher priority than V2.
  3. What is the operating temperature range of the LTC4418IUF#TRPBF?
    The operating temperature range is -40°C to 85°C.
  4. What type of FET does the LTC4418IUF#TRPBF use?
    The LTC4418IUF#TRPBF uses P-Channel FETs.
  5. How is the validation time for each channel configured?
    The validation time is configured via an external capacitor connected to the TMR pin.
  6. Can the LTC4418IUF#TRPBF be cascaded with other controllers?
    Yes, it can be cascaded with other LTC4418s or LTC4417s for multiple input switchover.
  7. What is the purpose of the internally generated 3.3V rail (INTVCC)?
    The INTVCC rail provides power to the internal circuits of the part.
  8. How does the LTC4418IUF#TRPBF protect external MOSFETs?
    It includes a gate driver with a 6V clamp to protect external MOSFETs.
  9. What happens when the highest priority valid input falls out of the OV/UV window?
    The highest priority valid input is immediately disconnected, and the other valid input is connected to the common output.
  10. What is the effect of pulling the SHDN pin below 1V?
    Pulling the SHDN pin below 1V disconnects all channels, disables the OV and UV comparators, and resets both channel validation timers.

Product Attributes

Type:Source Selector Switch
FET Type:P-Channel
Ratio - Input:Output:2:1
Internal Switch(s):Yes
Delay Time - ON:- 
Delay Time - OFF:- 
Current - Output (Max):- 
Current - Supply:52 µA
Voltage - Supply:40V
Applications:Industrial
Operating Temperature:-40°C ~ 85°C (TA)
Mounting Type:Surface Mount
Package / Case:20-WFQFN Exposed Pad
Supplier Device Package:20-QFN (4x4)
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In Stock

$7.36
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Similar Products

Part Number LTC4418IUF#TRPBF LTC4417IUF#TRPBF LTC4418CUF#TRPBF
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Product Status Active Active Active
Type Source Selector Switch Source Selector Switch Source Selector Switch
FET Type P-Channel P-Channel P-Channel
Ratio - Input:Output 2:1 3:1 2:1
Internal Switch(s) Yes No Yes
Delay Time - ON - 1.4 µs -
Delay Time - OFF - 700 ns -
Current - Output (Max) - - -
Current - Supply 52 µA 28 µA 52 µA
Voltage - Supply 40V 2.5V ~ 36V 40V
Applications Industrial Battery Backup, Handheld/Mobile Devices Industrial
Operating Temperature -40°C ~ 85°C (TA) -40°C ~ 85°C 0°C ~ 70°C (TA)
Mounting Type Surface Mount Surface Mount Surface Mount
Package / Case 20-WFQFN Exposed Pad 24-WFQFN Exposed Pad 20-WFQFN Exposed Pad
Supplier Device Package 20-QFN (4x4) 24-QFN (4x4) 20-QFN (4x4)

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