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Product Detailed Parameters
- Description：IC REG BUCK BOOST ADJ 4A DDPAK-5
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck, Boost, Buck-Boost, Flyback
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3.5V
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：1.244V
- Voltage - Output (Max)：60V (Switch)
- Current - Output：4A (Switch)
- Frequency - Switching：60kHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 100°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Supplier Device Package：DDPAK-5
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Overview
The LT1271CQ#PBF is a high-efficiency switching regulator manufactured by Analog Devices Inc. It integrates a 4A power switch and supports multiple DC-DC converter topologies, including buck, boost, flyback, forward, inverting, and Cuk configurations. The device operates with an input voltage range of 3V to 60V and provides a maximum output current of 4A. It features a fixed switching frequency of 100kHz and includes comprehensive protection mechanisms such as overcurrent limiting and thermal shutdown. The component is housed in a 16-pin plastic DIP package.
Feature Summary
- Integrates a high-current 4A power switch for efficient power conversion
- Supports versatile topology configurations including buck, boost, and flyback
- Includes built-in overcurrent and thermal protection circuitry
Applications
- Industrial power supply systems
- Battery-powered equipment requiring step-up or step-down regulation
- Telecommunications infrastructure power distribution
Procurement Notes
Verify the specific suffix and temperature grade against the official datasheet to ensure compatibility with your design requirements. Confirm that the manufacturer documentation explicitly lists the LT1271CQ#PBF as an active part number before finalizing procurement plans. Cross-reference the package type and pinout configuration to prevent integration errors during assembly.
Selection Notes
Select this component when designing circuits that require a robust monolithic solution capable of handling high input voltages up to 60V. It is suitable for applications demanding a fixed 100kHz switching frequency and integrated power switching without external discrete components. Ensure the thermal management strategy aligns with the device's power dissipation characteristics in the chosen topology.
Part Context
The LT1271 belongs to the family of high-efficiency switching regulators from Linear Technology, now part of Analog Devices. This series is designed to simplify power supply designs by integrating the power switch and control logic into a single IC. The LT1271 specifically targets applications needing reliable performance across a wide input voltage range with minimal external component count.
Replacement Considerations
The LT1270 is a related part within the same product family offering similar functionality but with different current capabilities. Verify electrical specifications and pin compatibility before substituting.
