LT8570IDD#PBF

Overview

The LT8570IDD#PBF is a PWM DC/DC converter from Analog Devices Inc. featuring an integrated 0.5A, 65V power switch. It supports boost, SEPIC, and inverting topologies with an adjustable output voltage range of 0.003V to 1.204V (minimum) up to 65V (switch limit). The device operates at a switching frequency between 200kHz and 1.5MHz. It accepts an input voltage from 2.55V to 40V and provides a single positive or negative output. The component is housed in an 8-WFDFN package with exposed pad and functions within a temperature range of -40°C to 125°C TJ.

Feature Summary

• Integrates a high-voltage 65V power switch capable of delivering 0.5A current for compact power solutions.
• Supports multiple conversion topologies including boost, SEPIC, and inverting configurations for versatile design flexibility.
• Features adjustable output voltage control allowing precise regulation across a wide dynamic range.
• Includes shutdown functionality to minimize quiescent current consumption during inactive periods.

Applications

• Generating negative rail voltages from positive input sources using inverting topology
• Step-up voltage conversion for battery-powered systems requiring higher operating voltages
• Powering isolated circuits via SEPIC configuration for varying input conditions
• Industrial control systems requiring robust DC-DC conversion with wide input ranges

Procurement Notes

Verify the specific suffix IDD indicates the industrial temperature grade and DFN package variant when ordering. Confirm that the #PBF designation ensures lead-free compliance and RoHS adherence as per manufacturer standards. Cross-reference the full part number LT8570IDD#PBF against official Analog Devices documentation to ensure compatibility with your board layout and thermal requirements before finalizing procurement decisions.

Selection Notes

Select this component when a single-inductor solution supporting multiple topologies is required. The integrated 65V switch allows handling higher voltage differentials without external components. Consider the 8-WFDFN package for space-constrained designs. Ensure the application utilizes the adjustable feedback network correctly to set the desired output voltage within the specified limits. Verify thermal performance given the exposed pad requirement for heat dissipation.

Part Context

The LT8570 series represents a family of flexible DC/DC converters designed for applications needing configurable power stages. The IDD variant specifically denotes the industrial temperature range and surface-mount packaging. This part belongs to the broader PMIC category, offering designers a unified platform for various conversion needs without switching between different IC families for boost, SEPIC, or inverting tasks.

Replacement Considerations

Direct replacements include other LT8570 variants such as LT8570EDD#PBF for commercial temperature grades or LT8570IMS8E-1#TRPBF for tape-and-reel packaging. Ensure pinout compatibility and thermal characteristics match when substituting. Verify that the alternative part supports the same switching frequency range and current capabilities for equivalent performance.

FAQ

What topologies does the LT8570 support?

The LT8570 can be configured as a boost, SEPIC, or inverting converter depending on the external component arrangement.

What is the maximum voltage rating of the internal switch?

The integrated power switch has a maximum voltage rating of 65V.

Is the output voltage fixed or adjustable?

The output voltage is adjustable, typically ranging from 0.003V to 1.204V minimum setting, up to the switch voltage limit.