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Product Detailed Parameters
- Description：IC REG BUCK ADJ 250MA 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：250mA
- 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 LT3470AEDDB#TRMPBF is a micropower step-down DC/DC converter manufactured by Analog Devices Inc. It integrates a 440mA power switch, catch diode, and boost diode into an 8-pin ThinSOT-8 package. The device operates with an input voltage range of 4V to 23V and provides an adjustable output voltage from 1.25V to 16V. It delivers up to 250mA of output current with a quiescent current of 25µA. The switching frequency is fixed at 1.2MHz, and it functions within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates a 440mA power switch, catch diode, and boost diode for compact design
- Combines Burst Mode and continuous operation for low ripple output
- Enables the use of miniature inductors and capacitors due to high switching frequency
Applications
- Battery-powered portable equipment
- Automotive electronics systems
- Industrial control applications
Procurement Notes
Verify the specific suffix #TRMPBF indicates tape and reel packaging when ordering. Confirm the A-grade temperature rating matches system requirements. Ensure the TSOT-23-8 footprint aligns with PCB layout constraints. Cross-reference the datasheet revision date to confirm latest electrical characteristics. Validate RoHS compliance status through official manufacturer declarations before final procurement.
Selection Notes
Select this component for designs requiring high efficiency in small form factors. The integrated boost diode simplifies circuits driving inductive loads or transformers. Compare output current capabilities against load demands to ensure adequate headroom. Evaluate thermal performance based on the exposed pad thermal resistance. Consider the fixed 1.2MHz frequency for EMI management relative to surrounding circuitry.
Part Context
This part belongs to the LT3470 family of micropower buck regulators. It shares architectural similarities with the standard LT3470 but features enhanced automotive-grade specifications. The EDDB designation identifies the specific 8-pin DFN package variant. It complements other Analog Devices PMIC solutions for comprehensive power management strategies.
Replacement Considerations
LT3470AIDDB#TRMPBF offers similar functionality with potential industrial temperature variations. LT3470EDDB serves as a baseline alternative with standard commercial specifications. Verify pin compatibility and thermal characteristics before substituting any related family members.
