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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 28TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.5V ~ 60V
- Frequency - Switching：50kHz ~ 1MHz
- Duty Cycle (Max)：99%
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Power Good, Soft Start, Tracking
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3840HFE#TRPBF is a synchronous step-down DC/DC controller IC manufactured by Analog Devices Inc. It operates with an input voltage range of 2.5V to 60V and supports output voltages from 1.25V to 60V. The device features a switching frequency of 1MHz and delivers up to 20A of output current. It utilizes a 28-TSSOP-EP package and includes accurate current limiting capabilities. The component is designed for non-isolated applications, offering high efficiency and precise regulation within the specified electrical parameters.
Feature Summary
- Supports wide input voltage ranges from 2.5V to 60V
- Features accurate current limiting for robust protection
- Enables high-frequency operation at 1MHz for compact designs
Applications
- Industrial power supplies
- Telecommunications equipment
- Point-of-load conversion
Procurement Notes
Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing components. Confirm that the 28-TSSOP-EP package matches the target PCB footprint requirements. Ensure compatibility with the intended switching frequency settings and thermal management solutions for the 20A output capability. Cross-reference the manufacturer part number with official distributor catalogs to avoid counterfeit products.
Selection Notes
Select this controller for applications requiring wide input voltage flexibility and high output current. The 1MHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal performance of the TSSOP-EP package for heat dissipation needs. Evaluate the need for external MOSFETs as this is a controller rather than a complete regulator solution.
Part Context
This component belongs to the LT3840 series of synchronous regulators. It is often evaluated using the DC1909A demo board. The device is part of Analog Devices' portfolio of power management integrated circuits. It complements other variants such as the LT3840MPFE#PBF which may offer different temperature grades or packaging options.
Replacement Considerations
Direct substitutes include the LT3840MPFE#PBF for military-grade temperature specifications. Other family members like the LTC7840HFE#TRPBF offer different topologies such as boost or flyback configurations.
