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Product Detailed Parameters
- Description：IC REG CTRLR BUCK-BOOST 38TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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)：2.8V ~ 80V
- Frequency - Switching：100kHz ~ 400kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：38-TFSOP (0.173", 4.40mm Width) 31 Leads, Exposed Pad
- Supplier Device Package：38-TSSOP-EP
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Overview
The LT8705AIFE#TRPBF is a synchronous four-switch buck-boost DC/DC controller from Analog Devices. It operates with input voltages ranging from 2.85 V to 80 V and supports output voltages from 1.3 V to 80 V. The device delivers up to 10 A of output current with a single output configuration. It features a switching frequency of 400 kHz and a quiescent current of 2.65 mA. Operating temperatures range from -40°C to +125°C, housed in a 38-TSSOP-EP package.
Feature Summary
- Synchronous four-switch topology enables efficient operation across buck, boost, and buck-boost modes regardless of input-to-output voltage relationships.
- Integrated clock synchronization allows multiple controllers to be phase-aligned for noise reduction and parallel operation.
- Built-in soft-start and frequency control capabilities provide stable startup sequences and flexible switching frequency adjustment.
Applications
- Industrial power systems requiring wide input voltage ranges
- Battery-powered equipment with varying cell counts
- Automotive electronics operating under fluctuating load conditions
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm that the component matches the 38-TSSOP-EP footprint requirements for your PCB layout. Ensure compatibility with the required thermal management solutions given the surface mount installation style. Check for any recent product change notices regarding material or assembly updates before finalizing procurement.
Selection Notes
Select this controller for applications demanding high efficiency across wide input-output voltage differentials. It is suitable where precise current delivery up to 10 A is required without external pass transistors. Consider the 400 kHz switching frequency for balancing size and performance. Ensure the design accommodates the 38-pin TSSOP-EP package dimensions and exposed pad thermal requirements.
Part Context
This part belongs to the LT8705A series, designed as a high-performance switching regulator controller. It integrates the drive signals for four external N-channel MOSFETs to manage power flow bidirectionally between source and load. The series is engineered for robustness in demanding environments, supporting both continuous and discontinuous conduction modes.
Replacement Considerations
LT8705AIFE#PBF is a tube-packaged version of the same functional device. LT8705EFE#TRPBF represents an earlier generation variant within the LT8705 family. Verify pinout and electrical specifications against datasheets before substituting, as interface tolerances may differ slightly between revisions.
