LX1681

Features: Fixed 200kHz Switching Frequency Constant Frequency Voltage-Mode Control Requires NO External CompensationHiccup-Mode Over-Current Protection High Efficiency Output Voltage Set By Resistor Divider Under-Voltage Lockout Soft-Start And Enable Synchronous Rectification (LX1682) Non-Synchro...

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LX1681 Picture
SeekIC No. : 004403434 Detail

LX1681: Features: Fixed 200kHz Switching Frequency Constant Frequency Voltage-Mode Control Requires NO External CompensationHiccup-Mode Over-Current Protection High Efficiency Output Voltage Set By Resisto...

floor Price/Ceiling Price

Part Number:
LX1681
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/28

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Product Details

Description



Features:

Fixed 200kHz Switching Frequency
Constant Frequency Voltage-Mode Control Requires NO External Compensation
Hiccup-Mode Over-Current Protection
High Efficiency
Output Voltage Set By Resistor Divider
Under-Voltage Lockout
Soft-Start And Enable
Synchronous Rectification (LX1682)
Non-Synchronous Rectification (LX1681)
Small, 8-pin Surface Mount Package



Application

5V to 3.3V Or Less Buck Regulators
FPGA Supplies
Microprocessor Chipset Supplies(e.g. Camino, Whitney, etc.)
 Rambus® RIMMTM Supplies
Hard Disk Drives
Computer Add-on Cards



Pinout

  Connection Diagram


Specifications

Supply Voltage (VC1) ............................................................................................ 18V
Supply Voltage (VCC) .............................................................................................. 7V
Output Drive Peak Current Source (500ns).......................................................... 1.0A
Output Drive Peak Current Sink (500ns) .............................................................. 1.0A
Input Voltage (SS/ENABLE Pin) .................................................................. -0.3V to 6V
Operating Junction Temperature ...................................................................... 150°C
Storage Temperature Range ........................................................... -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) ...................................................... 300°C



Description

The LX1681/1682 are monolithic, pulsewidth modulator controller ICs. They are designed to implement a flexible, low cost buck (step-down) regulator supply with minimal external components.

The LX1681 is a non-synchronous controller; the LX1682 has a synchronous driver for higher efficiency. The output voltage is adjustable by means of a resistor divider to set the voltage between 1.25V and 4.5V.




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