LT1931ES5#TRPBF

Overview

The LT1931ES5#TRPBF is a Cuk switching regulator IC manufactured by Analog Devices Inc., designed for generating negative adjustable output voltages. It operates within an input voltage range of 2.45V to 16V and provides a switch current capability of 1A. The device supports a negative output configuration adjustable from -1.255V to -34V with a single output channel. Operating at a fixed switching frequency of 1.2MHz, it utilizes a non-synchronous Cuk topology. The component is housed in a TSOT-23-5 surface-mount package and functions reliably across an ambient temperature range of 0°C to 70°C.

Feature Summary

• Implements Cuk topology to provide continuous input and output currents with low ripple characteristics.
• Generates negative output voltages through polarity inversion suitable for specific power supply requirements.
• Integrates a high-frequency 1.2MHz oscillator to minimize external passive component size.

Applications

• Negative voltage generation for analog signal processing circuits
• Power supplies requiring isolated-like negative rails without transformers
• Portable electronics needing compact step-up/step-down conversion

Procurement Notes

Verify the exact part number suffix against official Analog Devices documentation to ensure correct packaging and tape specifications. Confirm that the TSOT-23-5 package dimensions align with your PCB footprint requirements. Check for RoHS compliance status if required by your manufacturing standards. Ensure the operating temperature range meets your environmental constraints before finalizing procurement.

Selection Notes

Select this component when a negative output voltage is strictly required from a positive input source. The Cuk topology is preferred over Buck-Boost variants for applications demanding lower input and output current ripple. Consider the 1.2MHz switching frequency as a balance between efficiency and passive component size. Verify that the 1A switch current rating accommodates peak load demands including transient conditions.

Part Context

This component belongs to the LT1931 family of switching regulators from Analog Devices. It shares the TSOT-23-5 form factor with other thin small-outline packages in the series but differs in topology and output polarity. The LT1931 series focuses on efficient DC-DC conversion in minimal footprints, distinguishing itself from standard buck or boost converters by its ability to invert voltage polarity while maintaining continuous current flow.

Replacement Considerations

LT1931ES5#TRMPBF