LTC1147IS8-3.3#TRPBF Allicdata Electronics
Allicdata Part #:

LTC1147IS8-3.3#TRPBF-ND

Manufacturer Part#:

LTC1147IS8-3.3#TRPBF

Price: $ 2.44
Product Category:

Integrated Circuits (ICs)

Manufacturer: Linear Technology/Analog Devices
Short Description: IC REG CTRLR BUCK 8SOIC
More Detail: Buck Regulator Positive Output Step-Down DC-DC Co...
DataSheet: LTC1147IS8-3.3#TRPBF datasheetLTC1147IS8-3.3#TRPBF Datasheet/PDF
Quantity: 1000
2500 +: $ 2.21697
Stock 1000Can Ship Immediately
$ 2.44
Specifications
Frequency - Switching: --
Base Part Number: LTC1147
Supplier Device Package: 8-SOIC
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Operating Temperature: -40°C ~ 85°C (TA)
Control Features: Current Limit, Enable
Serial Interfaces: --
Clock Sync: No
Synchronous Rectifier: No
Duty Cycle (Max): 100%
Series: --
Voltage - Supply (Vcc/Vdd): 3.5 V ~ 14 V
Output Phases: 1
Number of Outputs: 1
Topology: Buck
Output Configuration: Positive
Function: Step-Down
Output Type: Transistor Driver
Part Status: Active
Packaging: Tape & Reel (TR) 
Description

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LTC1147IS8-3.3#TRPBF Application Field and Working Principle

The LTC1147 is a precision-variable frequency, high-efficiency pulse-width modulation (PWM) controller from Linear Technology. It is a monolithic powerhouse that integrates current sensing, power control, protection, and housekeeping functions in a tiny, 8-pin package. It is well-suited for a wide variety of low-voltage DC/DC applications, including (but not limited to) notebook computer power supplies, DC/DC converters, and battery poweredhandheld devices.

The LTC1147IS8-3.3#TRPBF offers excellent performance and integration in a tiny package. It is ideal for applications requiring variable switching frequencies, quick startup times, and excellent thermal performance. The controller offers even better specifications at higher temperatures, making it a good choice for higher-temperature environments, including those found in automotive and telecom applications.

LTC1147IS8-3.3#TRPBF Features

  • -4V to 15V input range
  • External adjustable/fixed frequency range from 100 kHz to 800 kHz
  • Very fast loop response times
  • High efficiency up to 94%
  • Undervoltage Lockout (UVLO)
  • Four programmable protection features: Overvoltage Protection, Short-Circuit Protection, Thermal Shutdown, and Overcurrent Protection
  • 20-pin low-cost package
  • Programmable/fixed operating frequency range from 100 kHz to 800 kHz
  • One-pin enable/disable control
  • 100% duty cycle

Working Principle

The LTC1147IS8-3.3#TRPBF uses a high-density, high-efficiency, synchronous, fixed-frequency pulse-width modulation (PWM) control circuit to regulate the output voltage. PWM control involves maintaining a fixed signal frequency and varying the signal\'s duty cycle to precisely regulate the output voltage. By increasing or decreasing the duty cycle and/or frequency, the output voltage can be lowered or raised.

The LTC1147IS8-3.3#TRPBF offers several unique features to support its PWM control topology. It includes a TRUE pin-selectable fixed frequency to completely eliminate the need for external components and an internal error amplifier to sense and regulate the output voltage. Also included are an over-voltage shutdown, under-voltage lockout, over-current protection and thermal protection.

Applications

  • Notebook computer power supplies
  • DC/DC converters
  • Battery-powered handheld devices
  • Portable consumer electronics
  • Automotive applications
  • Telecom applications

In conclusion, the LTC1147IS8-3.3#TRPBF is a high-performance, low-cost controller for DC/DC applications. It provides excellent performance in efficient, low-frequency switching applications, with an adjustable frequency range from 100 kHz to 800 kHz. Its high efficiency and fast loop response time make it an ideal solution for a variety of applications, from notebook computers to handheld devices.

The specific data is subject to PDF, and the above content is for reference

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