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LT1765-5 Datasheet

LT1765-5 Datasheet

Monolithic 3A, 1.25MHz Step-Down Switching Regulator
Part No.: LT1765-5
Page: 20 Pages
Size: 233 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-09-21 11:48:19
DataSheet: Download

LT1765-5 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1765EFE-5#PBF Tube 95 1765EFE-5 1 16 -40°C ~ 125°C 16-Lead Plastic TSSOP  
LT1765EFE-5#TRPBF Reel 2500 1765EFE-5 1 16 -40°C ~ 125°C 16-Lead Plastic TSSOP  
LT1765EFE-5#TRMPBF Reel 500 1765EFE-5 1 16 -40°C ~ 125°C 16-Lead Plastic TSSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1765-5 Datasheet(PDF)

LT1765-5 Datasheet(Picture)

LT1765-5 Features

  • 3A Switch in a Thermally Enhanced 16-Lead TSSOP or 8-Lead SO Package
  • Constant 1.25MHz Switching Frequency
  • Wide Operating Voltage Range: 3V to 25V
  • High Efficiency 0.09Ω Switch
  • 1.2V Feedback Reference Voltage
  • Uses Low Profile Surface Mount Components
  • Low Shutdown Current: 15µA
  • Synchronizable to 2MHz
  • Current Mode Loop Control
  • Constant Maximum Switch Current Rating at All Duty Cycles*
  • Available in 8-Lead SO and 16-Lead Thermally Enhanced TSSOP Packages

LT1765-5 Applications

  • DSL Modems
  • Portable Computers
  • Regulated Wall Adapters
  • Battery-Powered Systems
  • Distributed Power

LT1765-5 Description

The LT1765-5 is a 1.25MHz monolithic buck switching regulator. A high efficiency 3A, 0.09Ω switch is included on the die together with all the control circuitry required to construct a high frequency, current mode switching regulator. Current mode control provides fast transient response and excellent loop stability.

New design techniques achieve high efficiency at high switching frequencies over a wide operating voltage range. A low dropout internal regulator maintains consistent performance over a wide range of inputs from 24V systems to Li-Ion batteries. An operating supply current of 1mA improves efficiency, especially at lower output currents. Shutdown reduces quiescent current to 15µA. Maximum switch current remains constant at all duty cycles. Synchronization allows an external logic level signal to increase the internal oscillator into the range of 1.6MHz to 2MHz.

Full cycle-by-cycle current control and thermal shutdown are provided. High frequency operation allows the reduction of input and output filtering components and permits the use of chip inductors.

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