LT8705EFE

Description：IC REG BUCK
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:0c0ddbafa635 Category: DC DC Switching Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK
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)：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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LT8705EFE

Overview

The LT8705EFE is a synchronous buck-boost DC/DC switching regulator controller from Analog Devices Inc. It operates with an input voltage range of 2.8V to 80V and supports output voltages from 1.3V to 80V. The device features a programmable switching frequency between 100kHz and 400kHz, with a quiescent current of 2.65mA. It provides two independent outputs and includes integrated feedback loops for input/output voltage and current monitoring. The controller is housed in a 38-TSSOP-EP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

Synchronous four-switch buck-boost topology allowing operation when input voltage is above, below, or equal to the output voltage.
Integrated feedback loops for input current, input voltage, output current, and output voltage regulation.
Programmable switching frequency ranging from 100kHz to 400kHz with clock synchronization capability.
Dual independent outputs with enable, frequency control, and soft-start features.

Applications

Telecom voltage stabilizers
Solar power systems
Automotive electronics
Battery-powered systems

Procurement Notes

Verify the specific ordering suffix (e.g., #TRPBF for tape and reel or #PBF for tube) against the required packaging format. Confirm that the 38-TSSOP-EP package matches the PCB footprint requirements. Ensure the selected variant meets the thermal management needs for the intended operating temperature range of -40°C to +125°C. Cross-reference the datasheet revision to ensure compatibility with design specifications.

Selection Notes

Select this component for applications requiring wide input voltage ranges up to 80V and flexible buck-boost conversion. Consider the integrated current mode control and multiple feedback loops for precise regulation in complex power architectures. Evaluate the 100kHz to 400kHz frequency range against EMI constraints and inductor size requirements. Verify that the dual-output configuration aligns with system power distribution needs.

Part Context

The LT8705EFE belongs to the LT8705 series of high-performance synchronous buck-boost controllers. It is designed for robust power management in demanding environments, offering superior efficiency across varying load and line conditions. The device integrates advanced protection features and monitoring capabilities, making it suitable for critical infrastructure and industrial applications where reliability and wide operating ranges are essential.