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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：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-WFDFN Exposed Pad
- Supplier Device Package：8-DFN (3x2)
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Overview
The LT3470HDDB#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-WFDFN (3x2mm) package with an exposed pad. The device operates from a 4V to 40V input range and provides an adjustable output voltage between 1.25V and 16V. It delivers up to 200mA of output current with a quiescent current of 25µA. The switching frequency is fixed at 1.2MHz, and it supports operation in both Burst Mode and continuous conduction mode for low ripple 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 external component size while maintaining low output ripple.
- Features a shutdown pin for extended battery life in portable applications.
Applications
- Battery-powered portable instrumentation
- Industrial automation systems
- Automotive electronics requiring wide input voltage ranges
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the HDDB variant meets the required industrial temperature range of -40°C to +150°C. Ensure the 8-WFDFN exposed pad thermal design matches the target PCB layout. Cross-reference the manufacturer's latest datasheet for any updates on RoHS compliance or lead-free status before finalizing procurement specifications.
Selection Notes
Select this component for designs requiring a wide input voltage range up to 40V in a small surface-mount package. The integrated boost and catch diodes simplify the bill of materials compared to discrete solutions. Consider the 1.2MHz switching frequency for balancing efficiency and passive component size. Verify that the 200mA load capability aligns with the system's power requirements.
Part Context
This part belongs to the LT3470 family of micropower buck regulators. It shares functional similarities with other variants like the LT3470ETS8 and LT3470IDDB but differs in package type and temperature rating. The HDDB designation specifically refers to the 8-lead DFN package suitable for high-temperature industrial environments.
Replacement Considerations
LT3470IDDB#TRPBF: Similar functionality with different temperature grade. LT3470HTS8#TRMPBF: Same electrical performance in TSOT-23-8 package. LT3470ETS8#TRPBF: Industrial grade alternative in TSOT-23-8 package.
