LT1931IS5#TR

Description：IC REG CUK ADJ 1A TSOT23-5
Series：-
Mfr：Analog Devices Inc.
Package：Tape & Reel (TR)

SKU:4d08fec257db Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG CUK ADJ 1A TSOT23-5
Series：-
Mfr：Analog Devices Inc.
Package：Tape & Reel (TR)
Function：Step-Up/Step-Down
Output Configuration：Negative
Topology：Cuk
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：2.45V
Voltage - Input (Max)：16V
Voltage - Output (Min/Fixed)：-1.255V
Voltage - Output (Max)：-34V
Current - Output：1A (Switch)
Frequency - Switching：1.2MHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：SOT-23-5 Thin, TSOT-23-5
Supplier Device Package：TSOT-23-5

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LT1931IS5#TR

Overview

The LT1931IS5#TR is a Cuk switching regulator IC manufactured by Analog Devices Inc. It operates with an input voltage range of 2.45V to 16V and provides a negative adjustable output from -1.255V to -34V. The device supports a maximum switch current of 1A and functions at a fixed switching frequency of 1.2MHz. Packaged in a TSOT-23-5 surface-mount case, it is designed for applications requiring buck-boost capabilities with inverted polarity.

Feature Summary

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

Applications

Systems requiring negative voltage rails derived from positive sources
Portable electronics utilizing compact buck-boost conversion topologies
Industrial control circuits needing isolated-like signal conditioning power

Procurement Notes

Verify the suffix #TR against official datasheets to confirm tape-and-reel packaging specifications. Ensure the IS5 grade meets required temperature ranges. Cross-reference ordering codes with manufacturer documentation to avoid substitution errors during procurement.

Selection Notes

Select this component when negative output polarity is mandatory within a small footprint. The 1.2MHz frequency allows smaller inductors compared to lower-frequency alternatives. Verify that the 1A switch current rating accommodates peak load demands without exceeding thermal limits in the TSOT-23-5 package.

Part Context

This part belongs to the LT1931 family of DC-DC converters. It shares architectural similarities with other Linear Technology regulators but is distinct due to its Cuk topology implementation. The series focuses on high-efficiency power management in minimal space constraints.