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Product Detailed Parameters
- Description：IC REG BUCK ADJ 200MA 8DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-WFDFN Exposed Pad
- Supplier Device Package：8-DFN (3x2)
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Overview
The LT3470IDDB#TRPBF 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 with a quiescent current of 25µA. The switching frequency is fixed at 1.2MHz, and the component supports operation temperatures from -40°C to +125°C.
Feature Summary
- Integrates a 300mA power switch, catch diode, and boost diode within a compact footprint.
- Combines Burst Mode and continuous operation for low ripple output and high efficiency.
- Enables the use of miniature inductors and capacitors due to high switching frequency.
Applications
- Battery-powered portable equipment
- Automotive electronics systems
- Industrial control modules
Procurement Notes
Verify the specific suffix IDDB corresponds to the 8-DFN (3x2) package when sourcing. Confirm the temperature grade matches the design requirements, as variations exist within the series. Ensure compatibility with the intended PCB layout for the exposed pad thermal connection. Cross-reference the manufacturer's latest documentation for any updates to the pinout or electrical characteristics before finalizing the bill of materials.
Selection Notes
Select this component for designs requiring a small solution size and wide input voltage range. It is suitable for applications needing low quiescent current to extend battery life. Consider the 300mA internal switch limit when determining maximum load requirements. Evaluate the thermal performance of the DFN package against the expected power dissipation in the target environment.
Part Context
This part belongs to the LT3470 family of micropower buck regulators. It shares functional similarities with other members like the LT3470EDB and LT3470HDDB, differing primarily in package type and operating temperature range. The family is designed for space-constrained applications requiring efficient voltage conversion from higher bus voltages.
Replacement Considerations
LT3470EDB#TRPBF offers similar functionality in a different package variant. LT3470HDDB#TRPBF provides comparable electrical performance with potential environmental rating differences. Verify pin-to-pin compatibility and thermal characteristics before substituting.
