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Product Detailed Parameters
- Description：IC REG BUCK BST ADJ 2.5A DDPAK-5
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck, Boost, Cuk, Flyback, Forward Converter
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.244V
- Voltage - Output (Max)：65V (Switch)
- Current - Output：2.5A (Switch)
- Frequency - Switching：100kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 100°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Supplier Device Package：DDPAK-5
- Grade：-
- Qualification：-
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Overview
The LT1171IQ#TRPBF is a monolithic high-power switching regulator manufactured by Analog Devices Inc. It integrates a high-current, high-efficiency power switch with complete oscillator, control, and protection circuitry on a single die. The device supports a wide input voltage range of 3V to 60V and delivers an output current of 2.5A. It operates at a fixed switching frequency of 100kHz and provides an adjustable output voltage starting from 1.244V. The component is housed in a TO-263-6 (D2PAK) surface-mount package and is rated for junction temperatures between -40°C and +100°C.
Feature Summary
- Integrates a high-current, high-efficiency power switch with all necessary oscillator, control, and protection circuitry on a single monolithic die.
- Supports operation in all standard switching configurations including buck, boost, flyback, forward, inverting, and Cuk topologies.
- Features a wide input voltage operating range suitable for diverse power supply applications.
Applications
- Off-line power supplies driving high-voltage FETs
- -28V/2.5A negative boost regulators
- -12V/2.5A positive-to-negative buck-boost converters
- 5V/2.5A boost converters
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing this part number. Confirm that the manufacturer is Analog Devices Inc. and that the component matches the LT1171 family specifications. Ensure the package type corresponds to the TO-263-6 form factor required for your thermal and layout design constraints before finalizing procurement.
Selection Notes
Select the LT1171IQ#TRPBF when a 2.5A output current capability is required for high-power switching applications. This variant is appropriate for designs utilizing standard topologies such as buck, boost, or flyback converters. Consider the 100kHz switching frequency and wide input voltage range when evaluating compatibility with system power requirements and electromagnetic interference constraints.
Part Context
The LT1171 is part of the LT1170/LT1171 series of high-efficiency switching regulators from Analog Devices. While the LT1170 offers higher current capabilities, the LT1171 is optimized for 2.5A applications. Both devices share similar architectural features, including integrated power switches and comprehensive control circuitry, allowing for flexible implementation across various DC-DC conversion topologies.
Replacement Considerations
LT1170IQ#PBF serves as a related alternative within the same product family, offering higher current capacity but requiring verification of pinout and thermal compatibility.
