LT1777CS

有效庫存4,661

Compact, high-performance switching regulator for demanding application

  • 製造商零件號 # : LT1777CS

  • 包裝/封裝: SOIC-16

  • 製造商: Analog Devices Inc.

  • 產品分類 : Voltage Regulators - DC DC Switching Regulators

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LT1777CS 數據表

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詳細說明

The LT1777CS is a versatile and high-performance switching regulator that provides efficient power conversion for a wide range of applications. With its ability to deliver up to 1A of output current and a wide input voltage range of 3V to 18V, this device is well-suited for industrial, automotive, and telecommunications systems. The fixed frequency operation at 500kHz ensures fast transient response and helps to reduce the size of external components, making it easy to design into existing systems

主要特徵

  • LDO regulators have lower dropout voltage than switched regulators
  • but may not be as efficient at high frequencies or high-power levels
  • They are suitable for applications where the input voltage is near the output level, like in battery-powered devices

應用

  • The LT1777CS is versatile.
  • Great for portable devices.
  • Efficient voltage regulation.

規格

以下是所選零件的基本參數,涉及零件的特性及其所屬類別。

Product Category ! Switching Voltage Regulators RoHS No&nbsp-RoHS Version Available
Mounting Style SMD/SMT Package / Case SOIC-16
Topology Buck Output Voltage Adjustable
Output Current ! 440 mA Number of Outputs 1 Output
Input Voltage, Min 7 V Input Voltage, Max 48 V
Switching Frequency ! 100 kHz Minimum Operating Temperature 0 C
Maximum Operating Temperature ! + 125 C Series LT1777
Brand Analog Devices Height 1.75 mm
Operating Supply Current 620 uA Product Type ! Switching Voltage Regulators
Subcategory PMIC - Power Management ICs

數據表 PDF

數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。

初步規格 LT1777CS PDF 下載

常見問題解答

What is LT1777CS?

The LT1777CS is a high efficiency, 1.25A, 500kHz step-down switching regulator designed by Analog Devices. It is ideal for applications requiring high power density, high efficiency, and low heat generation, such as point-of-load regulation, distributed power systems, and industrial power supplies.

How Does LT1777CS Work?

The LT1777CS operates as a step-down switching regulator, converting a higher input voltage to a lower output voltage with high efficiency. It utilizes a high frequency, pulse-width modulation (PWM) control architecture to regulate the output voltage. The regulator features internal power switches and control circuitry, enabling compact and efficient power conversion.

How Many Pins does LT1777CS have and What are the Functions of the Pinout Configuration?

The LT1777CS is housed in a 16-lead SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:

  • VIN: Input voltage pin.
  • SW: Switching node connecting to the inductor.
  • GND: Ground pin.
  • FB: Feedback input for output voltage regulation.
  • ON/OFF: On/Off control pin.
  • SYNC: Synchronization input for an external clock.
  • COMP: Compensation pin for loop stability.
  • SS/TRK: Soft-start/Tracking pin for controlled startup and output voltage tracking.
  • VOUT: Regulated output voltage pin.

What are the Pros and Cons of LT1777CS?

Pros:

  • High Efficiency: Provides high efficiency power conversion for reduced power dissipation.
  • Compact Design: Offers high power density in a small form factor for space-constrained applications.
  • Wide Input Voltage Range: Supports a wide input voltage range for versatility in power supply design.
  • Adjustable Output Voltage: Allows for flexibility in output voltage regulation.
  • Synchronization Capability: Enables synchronization to an external clock for system integration.

Cons:

  • Switching Noise: High frequency switching may introduce electromagnetic interference that needs to be carefully managed in system design.
  • External Components: May require external components, such as inductors and capacitors, for proper operation.
  • Thermal Considerations: High efficiency switching regulators still generate some heat, necessitating thermal management.

Are There Any Equivalents/Alternatives to LT1777CS for Recommendation?

  • The LT1767 series from Analog Devices offers similar high-efficiency step-down switching regulators with different current and voltage ratings.
  • Alternatives to the LT1777CS include the LM2675 from Texas Instruments and the MAX5033 from Maxim Integrated.

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