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Product Detailed Parameters
- Description：IC REG BST CHARGE PUMP ADJ 14DFN
- 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)：22V
- Voltage - Output (Min/Fixed)：1.215V
- Voltage - Output (Max)：42V (Switch)
- Current - Output：3.3A (Switch)
- Frequency - Switching：200kHz ~ 2.5MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：14-WFDFN Exposed Pad
- Supplier Device Package：14-DFN (4x3)
- Grade：-
- Qualification：-
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Overview
The LT3581EDE#TRPBF is a monolithic PWM DC/DC converter featuring a 42V internal switch, designed for boost, inverting, flyback, SEPIC, and charge pump topologies. It delivers up to 3.3A output current with an input voltage range of 2.5V to 22V. The device operates at a fixed frequency of 1.2MHz and includes comprehensive fault protection against output short circuits, overvoltage, and thermal overload. Packaged in a 14-lead DFN with exposed pad, it supports adjustable output voltages starting from 1.215V.
Feature Summary
- Integrated 42V high-voltage power switch enables operation in demanding industrial and automotive environments.
- Built-in fault protection mechanisms safeguard against output shorts, input/output overvoltage, and excessive temperature.
- Flexible topology support allows configuration as a step-up, inverting, flyback, or SEPIC converter using a single inductor.
Applications
- Industrial control systems requiring isolated or inverted supply rails
- Automotive electronics operating within wide input voltage ranges
- Battery-powered devices utilizing boost or charge pump configurations
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the 14-lead DFN package dimensions match your PCB footprint requirements. Ensure the 42V switch rating aligns with your maximum input voltage plus transient spikes. Check RoHS compliance status for environmental regulations. Validate that the 1.2MHz switching frequency fits your EMI constraints.
Selection Notes
Select this component when high input voltages up to 22V are present but standard regulators cannot handle the stress. Choose the 3.3A current capability for moderate-to-high power applications. Consider the DFN package for compact designs requiring efficient thermal dissipation through the exposed pad. Verify that the fixed 1.2MHz frequency meets noise sensitivity requirements compared to lower-frequency alternatives.
Part Context
This part belongs to the LT3581 family of high-voltage DC/DC converters from Analog Devices. It shares architectural similarities with other members like the LT3581EDE#PBF but differs in packaging and reel specifications. The series is characterized by robust fault protection and versatile topology options suitable for harsh electrical environments.
Replacement Considerations
LT3581EDE#PBF offers identical electrical performance in tube packaging instead of tape-and-reel. LT3581IDE variants provide similar functionality with different pinout or thermal characteristics; verify compatibility before substitution.
