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Product Detailed Parameters
- Description：IC REG BUCK ADJ 200MA 8DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：16V
- Current - Output：200mA
- Frequency - Switching：-
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-WFDFN Exposed Pad
- Supplier Device Package：8-DFN (3x2)
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Overview
The LT3470EDDB#TRMPBF is a micropower step-down DC/DC converter manufactured by Analog Devices Inc. It integrates a 300mA power switch, catch diode, and boost diode into an 8-pin DFN EP package measuring 3mm x 2mm. The device operates with an input voltage range of 4V to 40V and provides an adjustable output voltage from 1.25V to 16V. It delivers up to 200mA of output current while maintaining low quiescent current of 25uA. The converter combines Burst Mode and continuous operation for efficient performance.
Feature Summary
- Integrates a 300mA power switch, catch diode, and boost diode within a compact footprint
- Combines Burst Mode and continuous operation to minimize ripple at light loads
- Supports wide input voltage ranges suitable for automotive and industrial applications
- Enables the use of miniature inductors and capacitors due to high switching frequency
Applications
- Automotive electronics requiring wide input voltage tolerance
- Portable battery-powered devices needing low quiescent current
- Industrial control systems utilizing buck topology
- Embedded systems with space-constrained PCB layouts
Procurement Notes
Verify the specific suffix TRMPBF indicates tape and reel packaging when ordering. Confirm the 8-WFDFN package dimensions match your board layout requirements. Ensure the operating temperature range meets your environmental specifications. Check for RoHS compliance status if required by your manufacturing standards. Validate that the 300mA switch current rating suffices for peak load demands.
Selection Notes
Select this component when a small solution size is critical alongside moderate current requirements. The integrated boost diode simplifies design for inductive loads or flyback applications. Consider the 25uA quiescent current for battery life optimization. The adjustable output allows flexibility in setting target voltages via external resistors. Evaluate thermal performance given the exposed pad thermal dissipation characteristics.
Part Context
This part belongs to the LT3470 family of micropower buck regulators. It shares core functionality with variants like LT3470EDDB and LT3470IDDB but differs in packaging and temperature grade. The EDDB suffix typically denotes a specific automotive-grade or extended temperature variant in the DFN package. It complements higher current regulators in the Analog Devices portfolio for low-power applications.
Replacement Considerations
LT3470EDDB#PBF offers the same electrical characteristics in a tube package instead of tape and reel. LT3470IDDB provides similar performance potentially with different temperature ratings. Verify pin compatibility and thermal resistance before substituting. Ensure the alternative supports the required 40V input maximum.
