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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 38TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Number of Outputs：2
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：4.7V ~ 60V
- Frequency - Switching：200kHz ~ 700kHz
- 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：38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：38-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3791EFE-1#TRPBF is a synchronous four-switch buck-boost controller from Analog Devices Inc., designed for high-efficiency power management. It supports an input voltage range of 4.7 V to 60 V and delivers up to 10 A output current with a maximum output voltage of 60 V. The device operates at a switch frequency between 200 kHz and 700 kHz, featuring a low static current of 3 mA. Packaged in a 38-TSSOP-EP surface-mount case, it functions within a temperature range of -40°C to +125°C TJ.
Feature Summary
- Synchronous four-switch topology enables efficient regulation across buck, boost, and pass-through modes regardless of input-output voltage relationships.
- Supports analog and PWM dimming capabilities for precise LED current control applications.
- Integrated shutdown functionality allows for effective power management and system standby optimization.
Applications
- LED driver controllers for lighting systems
- Battery-powered equipment requiring wide input voltage ranges
- Industrial power supply designs
Procurement Notes
Verify the specific suffix '-1' against official Analog Devices documentation to confirm functional differences compared to the standard LT3791 variant. Ensure the 38-TSSOP-EP package matches your PCB footprint requirements. Cross-reference the datasheet for thermal pad connection guidelines to ensure proper heat dissipation during operation.
Selection Notes
Select this component when designing circuits that require handling input voltages both above and below the output level without efficiency loss. The 10 A current capability suits medium-power applications. Consider the 200-700 kHz frequency range for balancing component size and switching losses. Verify compatibility with external MOSFETs for the specified voltage and current ratings.
Part Context
This part belongs to the LT3791 series, specialized as a True Color PWM™ LED driver controller. It is distinct from general-purpose regulators by its focus on maintaining consistent LED performance. The 'EFE-1' designation indicates a specific revision or variant within the TSSOP-EP package family offered by Analog Devices.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Users should consult Analog Devices for direct equivalents or updated revisions of the LT3791 series.
