LT8705AIUHF#PBF

$15.04

Description：IC REG CTRLR BUCK-BOOST 38QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:5371d4ea458b Category: DC DC Switching Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG CTRLR BUCK-BOOST 38QFN
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-WFQFN Exposed Pad
Supplier Device Package：38-QFN (5x7)

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LT8705AIUHF#PBF

Overview

The LT8705AIUHF#PBF is a high-performance synchronous buck-boost switching regulator 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 through its integrated four-switch topology. Key electrical parameters include a switch frequency range of 100 kHz to 400 kHz, a quiescent current of 2.65 mA, and an operating temperature range of -40°C to +125°C. It features integrated feedback loops for input/output voltage and current control.

Feature Summary

Synchronous four-switch buck-boost topology enabling operation above, below, or equal to the output voltage
Integrated closed-loop control for input current, input voltage, output current, and output voltage
Supports clock synchronization and external soft-start functionality

Applications

Supercapacitor backup power systems
Telecom voltage stabilizers
Industrial DC/DC conversion requiring wide input ranges

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the QFN-38 package dimensions match your PCB footprint requirements. Ensure the supplier provides valid traceability documentation for the Analog Devices manufacturer part number. Check for any restricted lifecycle status notifications before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring seamless transition between buck and boost modes without discontinuity. The integrated current mode control simplifies compensation compared to voltage mode alternatives. Consider the 38-QFN thermal pad requirements for adequate heat dissipation at maximum load currents. Verify that the external inductor selection supports the desired ripple current within the specified frequency range.

Part Context

This part belongs to the LT8705A series of synchronous buck-boost controllers. It shares architectural similarities with the LT8705 but may differ in temperature grades or specific electrical tolerances defined by the 'I' suffix. The series is designed for applications demanding high efficiency across wide input voltage variations.