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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 38TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- 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 LT3790EFE#PBF is a synchronous four-switch buck-boost voltage and current regulator controller manufactured by Analog Devices Inc. It operates within a supply voltage range of 4.7V to 60V and supports switching frequencies between 200kHz and 700kHz. The device regulates both output voltage and output current, functioning as a positive output step-up/step-down DC-DC controller. It is housed in a thermally enhanced 38-lead TSSOP package with an exposed pad.
Feature Summary
- Synchronous four-switch topology for efficient buck-boost regulation
- Capable of regulating both output voltage and output current
- Supports wide input voltage ranges up to 60V
Applications
- General DC-DC regulation
- LED driver control
- Battery-powered systems requiring step-up and step-down capabilities
Procurement Notes
Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the 38-TSSOP-EP package type matches your PCB footprint requirements. Ensure the operating temperature range of -40°C to 125°C TJ aligns with your thermal design constraints before finalizing procurement.
Selection Notes
Select this component when simultaneous voltage and current regulation is required in a buck-boost configuration. Consider the 200kHz to 700kHz frequency range for trade-offs between efficiency and passive component size. Verify that the external MOSFET selection supports the synchronous operation and current ratings needed for the specific application load.
Part Context
The LT3790 belongs to a family of high-voltage synchronous buck-boost controllers designed for applications where input voltages may rise above or fall below the desired output level. It differs from the LT3791, which is specifically optimized for LED driver applications with analog and PWM dimming features, whereas the LT3790 focuses on general voltage and current regulation.
Replacement Considerations
The LT3791EFE#PBF is a related part number within the same series but is designated as an LED driver controller. While they share similar topologies, verify if the specific dimming features of the LT3791 are necessary or if the general regulation focus of the LT3790 is sufficient for the design.
