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Product Detailed Parameters
- Description：IC REG BST CHARGE PUMP ADJ 20QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Boost, Charge Pump, Cuk, Flyback, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.5V
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：1.215V
- Voltage - Output (Max)：42V (Switch)
- Current - Output：6A (Switch)
- Frequency - Switching：200kHz ~ 2.5MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x5)
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Overview
The LT3579IUFD#TRPBF is a high-performance switching regulator IC manufactured by Analog Devices Inc., housed in a 20-lead WFQFN exposed pad package. It integrates a boost converter, charge pump, and Cuk/SEPIC topology to support flexible input-output voltage relationships. The device operates with an input voltage range of 2.5V to 16V and delivers up to 6A of switch current. Output voltage is adjustable from 1.215V to 42V. It features a programmable switching frequency between 200kHz and 2.5MHz and functions reliably across a junction temperature range of -40°C to +125°C.
Feature Summary
- Integrates multiple power topologies including boost, buck-boost, Cuk, SEPIC, and charge pump within a single monolithic IC.
- Supports wide input voltage ranges allowing operation from sources lower than or higher than the required output voltage.
- Features a wide adjustable switching frequency range to optimize efficiency and external component size for specific designs.
- Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.
Applications
- Battery-powered systems requiring voltage inversion or step-up/down capabilities
- Industrial control circuits needing isolated or non-isolated DC-DC conversion
- Automotive electronics operating with varying battery voltages
- Portable equipment utilizing lithium-ion or multi-cell battery packs
Procurement Notes
Verify the suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the IUFD variant matches the required industrial temperature grade and QFN package dimensions. Ensure compatibility with the intended PCB footprint and thermal pad design. Cross-reference the manufacturer's latest datasheet for any recent pinout or electrical specification updates before finalizing procurement.
Selection Notes
Select this component when a single IC must handle complex voltage conversion scenarios involving both step-up and step-down requirements. The integrated charge pump simplifies driving high-side N-channel MOSFETs in synchronous configurations. Consider the 6A switch current rating against peak load demands. Evaluate the 20-QFN package for thermal performance needs in compact enclosures.
Part Context
This part belongs to the LT3579 family of versatile DC-DC converters designed for applications where standard fixed-topology regulators are insufficient. It serves as a solution for designers needing flexibility in input-output voltage relationships without using multiple discrete components or complex transformer-based designs.
Replacement Considerations
LT3579IFE-1#PBF: Same functional core but in an SOIC-20 package instead of QFN. LT3579IUFD#PBF: Identical electrical specifications but supplied in tube packaging rather than tape-and-reel.
