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Product Detailed Parameters
- Description：IC REG BOOST ADJ 3A 14DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up
- Output Configuration：Positive or Negative
- Topology：Boost
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.3V
- Voltage - Input (Max)：24V
- Voltage - Output (Min/Fixed)：1.235V
- Voltage - Output (Max)：42V (Switch)
- Current - Output：3A (Switch)
- Frequency - Switching：200kHz ~ 3.5MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：14-WFDFN Exposed Pad
- Supplier Device Package：14-DFN (4x3)
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Overview
The LT3479EDE#PBF is a general-purpose positive/negative DC/DC converter featuring an integrated 3A switch. It operates with an input voltage range of 2.5V to 24V and supports boost or inverting topologies. The device delivers up to 42V output at 3A current capability. It utilizes a capacitor-programmable soft-start mechanism and includes inrush current protection. The switching frequency is adjustable from 200kHz to 3.5MHz, allowing optimization for efficiency or component size. The part is housed in a 14-lead DFN package and functions within a temperature range of -40°C to +85°C.
Feature Summary
- Integrates a 3A power switch capable of supporting high-current boost and inverting configurations.
- Features capacitor-programmable soft-start to limit inrush current during startup sequences.
- Offers flexible switching frequency adjustment via external components to balance efficiency and passive size.
Applications
- General purpose positive voltage conversion
- Negative voltage generation (inverting topology)
- Battery-powered systems requiring step-up or inversion
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm availability status as supply may be limited. Ensure the DFN-14 package dimensions match the target PCB footprint requirements. Validate that the operating temperature range meets the environmental specifications of the final assembly.
Selection Notes
Select this component when a single IC solution is required for both positive and negative rail generation. Consider the wide input voltage range suitable for varying battery states. Evaluate the maximum output voltage rating against the load requirements. Assess the thermal performance within the DFN-14 package for the expected current loads.
Part Context
This part belongs to the LT3479 family of general-purpose converters designed by Analog Devices. It is distinct from LED drivers like the LT3478 or other buck regulators in the portfolio. The device is specifically engineered for applications needing versatile topology support in a compact form factor.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical parameters if considering alternative manufacturers.
