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DC/DC Cntrlr Single-OUT Step Down/Step Up 400kHz Automotive 38-Pin QFN EP Tube

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LT8705IUHF#PBF General Description

The LT8705 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The part has integrated input current, input voltage, output current and output voltage feedback loops. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8705 is compatible with most solar, automotive, telecom and battery-powered systems.

The LT8705 includes servo pins to indicate which feedback loops are active. The MODE pin selects among Burst Mode® operation, discontinuous or continuous conduction mode at light loads. Additional features include a 3.3V/12mA LDO, a synchronizable fixed operating frequency, onboard gate drivers, adjustable UVLO, along with input and output current monitoring with programmable maximum levels.

LT8705LT8705AImproved, pin-to-pin compatible version of LT8705. Recommended for all new designs

Analog Devices, Inc Inventory

Key Features

  • Single Inductor Allows VIN Above, Below, or Equal to Regulated VOUT
  • VIN Range 2.8V (Need EXTVCC > 6.4V) to 80V
  • VOUT Range: 1.3V to 80V
  • Quad N-Channel MOSFET Gate Drivers
  • Synchronous Rectification: Up to 98% Efficiency
  • Input and Output Current Monitor Pins
  • Synchronizable Fixed Frequency: 100kHz to 400kHz
  • Integrated Input Current, Input Voltage, Output and Output Voltage Feedback Loops
  • Clock Output Usable To Monitor Die Temperature
  • Available in 38-Lead (5mm × 7mm) QFN and TSSOP Packages with the TSSOP Modified for Improve Voltage Operation
Analog Devices, Inc Original Stock


  • High Voltage Buck-Boost Converters
  • Input or Output Current Limited Converters
Analog Devices, Inc Inventory


model LT8705IUHF#PBF package 38-Lead QFN (5mm x 7mm w/ EP)
packingQty Tube,52 packingOption Tube
packageType 05-08-1701 rohs roHSY
lifeCycle production tempRange -40 to 125C
Manufacturer Analog Devices Inc. Product Category Switching Voltage Regulators
RoHS Details Output Voltage 1.3 V to 80 V
Output Current 10 A Input Voltage, Max 80 V
Number of Outputs 1 Output Topology Boost, Buck
Package / Case QFN-38 Mounting Style SMD/SMT
Switching Frequency 350 kHz Quiescent Current 2.65 mA
Minimum Operating Temperature - 40 C Maximum Operating Temperature + 125 C
Series LT8705 Input Voltage, Min 2.8 V
Brand Analog Devices Development Kit DC1924A
Input Voltage 2.8 V to 80 V Operating Supply Current 2.65 mA
Product Type Switching Voltage Regulators Shutdown Shutdown
Factory Pack Quantity 52 Subcategory PMIC - Power Management ICs
Type Synchronous 4-Switch Buck-Boost DC/Dc Controller


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

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We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
customs fees, etc.

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Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


  • Tape and Reel

    Tape and Reel

  • Cut Tape

    Cut Tape

  • Tube or Tray

    Tube or Tray


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LT8705IUHF#PBF Datasheet PDF

Preliminary Specification LT8705IUHF#PBF PDF Download

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Buying Guide

  • What is the lifespan of LT8705IUHF#PBF?

    The lifespan of LT8705IUHF#PBF depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of LT8705IUHF#PBF?

    You can find it with PDF Datasheet for LT8705IUHF#PBF on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

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