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LTC4417: Prioritized PowerPath Controller Data Sheet11/27/2012PDF428K
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Overview
Features and Benefits
- Selects Highest Priority Supply from Three Inputs
- Blocks Reverse and Cross Conduction Currents
- Wide Operating Voltage Range: 2.5V to 36V
- –42V Protection Against Reverse Battery Connection
- Fast Switchover Minimizes Output Voltage Droop
- Low 28μA Operating Current
- <1μA Current Draw from Supplies Less than VOUT
- 1.5% Input Overvoltage/Undervoltage Protection
- Adjustable Overvoltage/Undervoltage Hysteresis
- P-Channel MOSFET Gate Protection Clamp
- Cascadable for Additional Input Supplies
- 24-Lead Narrow SSOP and 4mm × 4mm QFN Packages
Product Details
The LTC4417 connects one of three valid power supplies to a common output based on priority. Priority is defined by pin assignment, with V1 assigned the highest priority and V3 the lowest 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 256ms. If the highest priority valid input falls out of the OV/UV window, the channel is immediately disconnected and the next highest priority valid input is connected to the common output. Two or more LTC4417s can be cascaded to provide switchover between more than three inputs.
The LTC4417 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 output ramp feature minimizes start-up inrush current. Open drain VALID outputs indicate the input supplies have been within their OV/UV window for 256ms.
Applications
- Industrial Handheld Instruments
- High Availability Systems
- Battery Backup Systems
- Servers and Computer Peripherals
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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Micropower Hot Swap Controller8/1/2014PDF699K
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Ideal Diodes and Prioritizers6/8/2018PDF1 M
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Enhance Sustainable Logistics with Automatic Data Capture11/13/2022PDF5 M
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Prioritizers - Video Product Brief10/30/2018
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Adding Hysteresis for Smooth Undervoltage and Overvoltage Lockout3/5/2021 Analog Dialogue
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Primer on PowerPath Controllers, Ideal Diodes & Prioritizers4/29/2016
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Prioritize Power Sources in Any Order, Regardless of Relative Voltage: No µP Required7/1/2013 LT Journal
Tools & Simulations
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LTC4417
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Reference Designs (1)
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LTC4417 Discussions
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.