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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：4V ~ 60V
- Frequency - Switching：300kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3845IFE#TRPBF is a high voltage, synchronous current mode step-down controller designed for medium to high power applications. It operates with an input voltage range of 4V to 60V and supports adjustable operating frequencies from 100kHz to 500kHz. The device features Burst Mode operation to maintain high efficiency at light loads by reducing quiescent current to 120μA. It includes an onboard regulator that simplifies biasing requirements by powering the IC directly from the input voltage. The component is housed in a 16-lead TSSOP package.
Feature Summary
- Synchronous current mode control architecture for high efficiency
- Wide 4V to 60V input voltage range with onboard bias regulator
- Burst Mode operation reduces quiescent current at light loads
- Adjustable switching frequency from 100kHz to 500kHz
Applications
- Industrial control systems
- Telecom power supplies
- Distributed power architectures
- High efficiency DC/DC converters
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm the manufacturer designation as Analog Devices Inc. or Linear Technology to ensure authenticity. Check RoHS compliance status through official documentation. Ensure the 16-lead TSSOP package matches the design footprint requirements. Validate the part number against the latest datasheet revisions to confirm functional specifications.
Selection Notes
Select this controller for designs requiring wide input voltage ranges up to 60V. Consider the onboard regulator for simplified biasing circuits without external supply generation. Evaluate the adjustable frequency range for EMI optimization and passive component sizing. Assess thermal performance requirements given the synchronous rectification capabilities. Review the Burst Mode functionality for applications demanding high light-load efficiency.
Part Context
The LT3845AFE series belongs to Analog Devices' portfolio of high voltage synchronous buck controllers. This family targets applications needing robust performance across varying load conditions. The LT3845IFE variant specifically utilizes the TSSOP-16 package for surface mount assembly. Development tools like the DC1619A demo board are available to assist in circuit validation and performance testing.
Replacement Considerations
Consult official substitution guides for equivalent high voltage synchronous buck controllers. Verify pin compatibility and electrical parameters before replacing the LT3845IFE#TRPBF. Ensure alternative parts support the required 4V to 60V input range and current mode control.
