LT3470ETS8#TRPBF

Overview

The LT3470ETS8#TRPBF is a micropower buck DC/DC converter from Analog Devices, housed in an 8-pin TSOT-23 package. It integrates a 300mA power switch, catch diode, and boost diode to support step-down conversion with an input voltage range of 4V to 40V. The device provides an adjustable output voltage between 1.25V and 16V, delivering up to 200mA of output current. Operating at a fixed switching frequency of 1.2MHz, it maintains a low quiescent current of 25µA. The component is AEC-Q100 qualified for automotive applications and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a 300mA power switch, catch diode, and boost diode into a compact surface-mount package.
• Combines Burst Mode operation with continuous conduction to minimize ripple while enabling the use of small external components.
• Features an adjustable output voltage range suitable for various logic and analog supply requirements.
• Includes a shutdown pin to reduce standby power consumption in battery-operated systems.

Applications

• Battery-powered portable electronics requiring efficient step-down regulation
• Automotive electronic modules needing AEC-Q100 qualified power management
• Industrial control systems utilizing wide input voltage ranges
• Embedded systems requiring low quiescent current for extended battery life

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm that the ETS8 designation matches the required TSOT-23-8 thin profile footprint for your PCB layout. Ensure the automotive grade qualification aligns with your system's reliability standards. Cross-reference the datasheet revision date to confirm compatibility with your design specifications before finalizing procurement.

Selection Notes

Select this component when space constraints necessitate an integrated solution with built-in boost and catch diodes. It is appropriate for designs requiring a wide input voltage range up to 40V with moderate output current capabilities. Consider the 1.2MHz switching frequency for balancing efficiency against electromagnetic interference. Verify that the thermal performance of the TSOT-23 package meets the thermal dissipation requirements of your specific application environment.

Part Context

This part belongs to the LT3470 family of micropower buck regulators designed for high-efficiency power conversion in small form factors. The series is characterized by its ability to operate efficiently across a broad input voltage spectrum while maintaining low noise output. It serves as a key component in modern power management architectures where size and power efficiency are critical design parameters.

Replacement Considerations

LT3470EDDB variants offer alternative DD package options. Other LT3470 family members may provide different pinouts or thermal characteristics. Verify electrical equivalence and physical dimensions before substitution.

FAQ

Does the LT3470ETS8#TRPBF include internal bootstrap and catch diodes?

Yes, the device integrates both a catch diode and a boost diode along with the main power switch, reducing the need for external discrete components.

What is the maximum input voltage supported by this regulator?

The LT3470ETS8#TRPBF supports a maximum input voltage of 40V, allowing it to handle wide input voltage ranges typical in automotive and industrial applications.