LT8705EFE

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LT8705EFE

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規格

Part Status Obsolete
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
Synchronous Rectifier Yes
Clock Sync Yes
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
Base Product Number LT8705

概述

Description

The LT8705EFE is a high-performance, synchronous step-down regulator designed for converting high input voltages to lower output voltages efficiently. It operates with an input voltage range of 4.5V to 60V, making it suitable for a variety of applications including industrial, automotive, and telecom systems. The device features a high efficiency of up to 96% and offers a wide range of output current capabilities.
Key features include adjustable output voltage, fast transient response, and a built-in soft-start function to minimize inrush current. It also supports a wide selection of output capacitors, including ceramic, which enhances design flexibility. The LT8705EFE comes with features such as overvoltage protection, thermal shutdown, and a power good indicator, ensuring robust performance and safety in demanding applications.
Designed for ease of use, the LT8705EFE includes a simple pin configuration and comes in a compact package, facilitating integration into space-constrained designs. Overall, it is an ideal choice for engineers seeking a reliable and efficient solution for high-voltage power conversion.

Features

The LT8705EFE is a highly integrated, high-efficiency buck-boost battery charger and power management IC. Key features include:
1. Wide Input Voltage Range: Operates from 3.5V to 60V, accommodating various power sources.
2. Buck-Boost Operation: Supports both buck (step-down) and boost (step-up) configurations, ideal for applications with variable input/output levels.
3. High Efficiency: Offers efficiency up to 95%, minimizing heat generation and improving battery charging speed.
4. Programmable Charge Current: Supports adjustable charge current settings for flexible battery management.
5. Integrated Power FETs: Reduces external component count and board space.
6. Battery Protection Features: Includes over-voltage, under-voltage, and thermal protection to ensure safe operation.
7. I2C Communication: Allows for monitoring and control of charger parameters via a digital interface.
8. Small Package Size: Available in a compact 32-pin LQFP package, facilitating easy integration into space-constrained designs.
These features make the LT8705EFE suitable for a variety of applications, including portable devices and energy harvesting systems.

Package

The LT8705EFE is packaged in a 16-lead TSSOP (Thin Shrink Small Outline Package) format, which is known for its compact size and suitability for space-constrained applications.

Pinout

The LT8705EFE is a high-performance, synchronous buck-boost converter from Analog Devices. It features a 28-pin TSSOP package.
The primary functions of the pins include:
1. Power Input/Output: Pins for VIN (input voltage) and VOUT (output voltage) connections.
2. Control: EN (enable) pin for turning the device on/off, and pins for setting the switching frequency.
3. Feedback: FB pins for voltage feedback, allowing for output voltage regulation.
4. Sensing: Pins for current sensing and compensation to ensure stable operation.
5. Switch Control: SW pins for connecting to the internal power switches and inductor.
6. Fault Protection: Pins for thermal shutdown and overvoltage protection.
Overall, the LT8705EFE is designed for applications requiring efficient power conversion between varying input and output voltages.

Manufacturer

The LT8705EFE is manufactured by Analog Devices, Inc. Analog Devices is a global company that specializes in high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. Founded in 1965, the company is headquartered in Norwood, Massachusetts, and serves a wide range of industries, including automotive, communications, consumer electronics, and industrial applications. They are well-known for their innovative solutions in data conversion, signal processing, and power management. The LT8705EFE itself is a high-efficiency buck-boost DC-DC converter, designed to provide flexible power management solutions.

Application

The LT8705EFE is a high-performance buck-boost converter used in various applications, including battery management systems, solar power systems, and portable electronics. It efficiently regulates voltage in scenarios where input voltage may be above, below, or equal to the output voltage. Its versatility makes it suitable for automotive power supplies, industrial equipment, and renewable energy applications, ensuring reliable power delivery in demanding environments.

Equivalent

The LT8705EFE is a high-performance bidirectional DC-DC converter controller. Equivalent products include the Texas Instruments TPS55288, Analog Devices ADP2302, and Maxim Integrated MAX1573. These alternatives also support bidirectional conversion with similar voltage and current specifications. Always verify specific application requirements, efficiency, and features when selecting an equivalent component.

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