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Product Detailed Parameters
- Description：IC REG BOOST CUK ADJ 5A 36QFN
- 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, Cuk, Flyback, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.6V
- Voltage - Output (Max)：40V (Switch)
- Current - Output：5A (Switch)
- Frequency - Switching：100kHz ~ 1MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：36-WFQFN, 28 Leads, Exposed Pad
- Supplier Device Package：36-QFN (5x6)
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Overview
The LT3957AEUHE#TRPBF is a current mode DC/DC converter from Analog Devices, packaged in a QFN-36. It features an internal low-side N-channel power MOSFET rated for 40V and 5A, driven by a regulated 5.2V supply. The device supports boost, flyback, SEPIC, and inverting topologies with an input voltage range of 3V to 40V. It delivers up to 5A output current at voltages up to 40V, operating at a fixed 1MHz frequency. Quiescent current is 1µA, with an operating temperature range of -40°C to +125°C.
Feature Summary
- Configurable as boost, flyback, SEPIC, or inverting converter
- Internal 40V, 5A power switch driven by regulated supply
- Fixed frequency current-mode architecture for stable operation
Applications
- Industrial power supplies requiring wide input ranges
- Battery-powered systems needing efficient step-up conversion
- Negative voltage generation for analog circuits
- Isolated power stages using flyback topology
Procurement Notes
Verify the specific 'A' suffix designation against official Analog Devices documentation to confirm any distinct electrical characteristics compared to standard LT3957 variants. Ensure the EUHE package type matches PCB footprint requirements. Confirm RoHS compliance status through manufacturer datasheets prior to integration.
Selection Notes
Select this component when high input voltage tolerance up to 40V is required alongside significant output current capabilities. The integrated 5A switch reduces external component count. Consider the 1MHz switching frequency for balancing efficiency and passive size. Evaluate thermal performance within the specified operating temperature range during design.
Part Context
This part belongs to the LT3957 series of wide input range DC/DC converters. It shares architectural similarities with the LT3958 but differs in maximum voltage ratings and switch current capabilities. The series is designed for applications demanding flexible topology configuration and robust performance across varying load conditions.
Replacement Considerations
LT3957EUHE#PBF offers identical functionality in tube packaging. LT3958 variants provide higher voltage ratings but may require different component selection. Verify pin compatibility and thermal requirements when substituting.
