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Product Detailed Parameters
- Description：IC REG CUK ADJ 1A TSOT23-5
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：2.2MHz
- 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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Overview
The LT1931AIS5#TRMPBF is a negative Cuk switching regulator IC manufactured by Analog Devices Inc. It operates within an input voltage range of 2.45V to 16V and delivers a switch current of 1A. The device provides an adjustable negative output voltage ranging from -1.255V to -34V. It functions at a fixed switching frequency of 2.2MHz and supports operation in ambient temperatures from 0°C to 70°C. The component is housed in a compact TSOT-23-5 surface-mount package.
Feature Summary
- Implements Cuk topology for efficient negative voltage conversion
- Provides fully adjustable negative output voltage capability
- Integrates high-frequency switching for reduced passive component size
Applications
- Portable devices requiring negative supply rails
- Battery-powered systems needing inverted voltage levels
- Industrial instrumentation with dual polarity requirements
Procurement Notes
Verify the specific suffix TRMPBF indicates tape-and-reel packaging upon ordering. Confirm the 'A' grade designation matches required temperature performance specifications. Ensure compatibility with the TSOT-23-5 footprint during PCB layout. Cross-reference official datasheets for absolute maximum ratings before integration.
Selection Notes
Select this component when a negative output voltage is strictly required from a positive input source. The Cuk topology offers continuous input and output currents, reducing filtering needs compared to other topologies. Consider the 1A switch current limit and 2.2MHz frequency for thermal management and inductor selection in space-constrained designs.
Part Context
This part belongs to the LT1931 family of negative DC/DC converters. It shares functional similarities with the LT1930 but is optimized for generating negative voltages. The series is designed for applications where standard buck or boost converters cannot provide the necessary inverted power rail efficiently.
Replacement Considerations
LT1931AES5#TRPBF is a verified substitute offering identical electrical characteristics and functionality. Verify that the TRPBF suffix aligns with preferred packaging requirements for manufacturing processes.
