LT3470ITS8#TRPBF

Overview

The LT3470ITS8#TRPBF is a micropower buck regulator from Analog Devices, housed in an 8-pin TSOT-23 package. It operates with an input voltage range of 4 V to 40 V and provides an adjustable output voltage between 1.25 V and 16 V. The device delivers up to 200 mA of output current while maintaining a low quiescent current of 25 uA. It integrates a 300 mA power switch, catch diode, and boost diode within the chip. The switching frequency is fixed at 1.2 MHz, enabling the use of compact external components. It functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates a 300 mA power switch, catch diode, and boost diode into a single compact package.
• Combines Burst Mode operation with continuous conduction for high efficiency at light loads.
• Supports wide input voltage ranges suitable for automotive and industrial applications.

Applications

• Automotive electronics requiring robust power management under varying line conditions
• Industrial control systems utilizing 12V or 24V bus architectures
• Portable equipment powered by multi-cell battery configurations

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and tape-and-reel specifications. Ensure the component meets required environmental standards for the target deployment environment. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and supply chain integrity before finalizing procurement orders.

Selection Notes

Select this component when designing space-constrained circuits requiring a wide input voltage range and integrated passive solutions. The fixed 1.2 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the thermal performance within the TSOT-23 package for high ambient temperature environments. Verify that the load current requirements do not exceed the internal switch limits during peak operation scenarios.

Part Context

This part belongs to the LT3470 family of micropower step-down DC/DC converters. The series is characterized by its ability to integrate external boost and catch diodes typically found in inverting or negative voltage regulators, although configured here as a standard buck topology. The family targets applications demanding high efficiency and minimal footprint in power-sensitive designs.

Replacement Considerations

Consult official Analog Devices substitution guides for compatible parts within the LT3470 series. Verify pinout compatibility and electrical parameter alignment before integrating alternative components into existing board layouts.