LT1767EMS8E

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LT1767EMS8E

LT1767 - IC VOLT REG ADJUSTABLE

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規格

Package Bulk
ProductStatus Obsolete
Function Step-Down, Step-Up/Step-Down
OutputConfiguration Positive
Topology Buck, SEPIC
OutputType Adjustable
NumberofOutputs 1
Voltage-Input(Min) 3V
Voltage-Input(Max) 25V
Voltage-Output(Min/Fixed) 1.2V
Voltage-Output(Max) 22.5V
Current-Output 1.5A (Switch)
Frequency-Switching 1.25MHz
SynchronousRectifier No
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) Exposed Pad

概述

Description

The LT1767EMS8E is a high-efficiency, step-down (buck) switching regulator designed by Analog Devices, under the Linear Technology brand. It is intended for applications requiring a compact and efficient DC-DC conversion solution. The device operates with a wide input voltage range, typically from 3.6V to 25V, and can deliver an output current of up to 1A, making it suitable for various portable and battery-powered applications.
Key features of the LT1767EMS8E include its ability to maintain high efficiency across different loads, thanks to a current mode PWM architecture. It also includes an internal switch that enhances efficiency and reduces the need for external components, thereby minimizing board space. The device comes in a small MSOP-8 package, which is advantageous for space-constrained designs.
Protection features of the LT1767EMS8E include thermal shutdown, current limiting, and undervoltage lockout, ensuring robust operation under diverse conditions. It’s particularly used in applications like distributed power systems, notebooks, and battery-powered devices, where efficiency and space are crucial.

Features

The LT1767EMS8E is a high-efficiency step-down DC/DC converter. Key features include:
1. Efficiency: It operates with high efficiency, typically around 92%, which is ideal for battery-powered applications.

2. Operating Voltage: The device supports an input voltage range from 3.6V to 25V, making it versatile for various power sources.
3. Output Current: It can deliver up to 1.2A of continuous output current, suitable for powering small to medium-sized loads.
4. Fixed and Adjustable Output: It offers both fixed and adjustable output voltage options. The fixed version outputs 5V, while the adjustable version supports output voltages as low as 1.25V.
5. Switching Frequency: The device operates at a fixed switching frequency of 200kHz, which helps minimize noise and filter size.
6. Low Quiescent Current: With a low quiescent current of 100µA, it enhances battery life in portable applications.
7. Thermal Shutdown: Built-in thermal shutdown protection prevents overheating.
8. Compact Size: Available in a small MSOP-8 package, it is suitable for space-constrained designs.
These features make the LT1767EMS8E an ideal choice for efficient power management in various electronic devices.

Package

The LT1767EMS8E is a voltage regulator IC housed in an MSOP-8 package, which is a Mini Small Outline Package with 8 pins. This type of packaging is compact, making it suitable for space-constrained applications.

Pinout

The LT1767EMS8E is a step-down switching regulator integrated circuit from Analog Devices, originally developed by Linear Technology. It typically comes in an 8-pin MSOP package. Here is a brief overview of its pin functions:
1. SW (Pin 1): This is the switch pin where the inductor is connected. It handles the output from the internal power switch.
2. GND (Pin 2): Ground pin for both the control circuitry and the power switch.
3. FB (Pin 3): Feedback pin used to set the output voltage via an external resistor divider network.
4. SHDN (Pin 4): Shutdown pin that can be used to turn off the regulator, reducing the supply current to a low quiescent level.
5. VIN (Pin 5): Input voltage pin where the supply voltage is provided to the device.
6. BOOST (Pin 6): This pin is used to provide a higher voltage to the internal power switch's driver circuit for efficient operation, typically through an external capacitor.
7. VC (Pin 7): Compensation pin to stabilize the control loop and optimize transient response.
8. PGOOD (Pin 8): Power good indicator pin that signals when the output voltage is within the specified range.
This regulator is used for efficient DC-DC conversion in various applications.

Manufacturer

The LT1767EMS8E is manufactured by Analog Devices, Inc. Analog Devices is a semiconductor company that specializes in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits used in electronic equipment. They provide solutions for a wide range of applications, including communications, healthcare, automotive, industrial, and consumer electronics.

Application

The LT1767EMS8E is a high-efficiency step-down switching regulator. Its application areas include portable electronics, battery-powered devices, telecommunications equipment, distributed power systems, and industrial controls. It is suitable for use where space is limited and high efficiency is needed, such as in embedded systems, automotive electronics, and point-of-load power conversion.

Equivalent

The LT1767EMS8E is a high-efficiency step-down DC/DC converter. Equivalent products from other manufacturers could include:
1. Texas Instruments: TPS62110
2. Microchip Technology: MCP16301
3. ON Semiconductor: NCP3063
4. STMicroelectronics: L4973D3.3
5. Maxim Integrated: MAX638
These alternatives should match the specifications and functional parameters of the LT1767EMS8E closely, but always verify the datasheets for compatibility.

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