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LTC3873

Features: `VIN and VOUT Limited Only by External Components` Internal or Programmable External Soft-Start` Constant Frequency 200kHz Operation` Adjustable Current Limit` Current Sense Resistor Optional` Maximum 60V on SW Node with RDS(ON) Sensing` ±1.5% Voltage Reference Accuracy` Current Mode Ope...

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SeekIC No. : 004402396 Detail

LTC3873: Features: `VIN and VOUT Limited Only by External Components` Internal or Programmable External Soft-Start` Constant Frequency 200kHz Operation` Adjustable Current Limit` Current Sense Resistor Optio...

LTC3873 Data Sheet

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Part Number:
LTC3873
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: 2024/11/21

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Product Details

Description



Features:

`VIN and VOUT Limited Only by External Components
` Internal or Programmable External Soft-Start
` Constant Frequency 200kHz Operation
` Adjustable Current Limit
` Current Sense Resistor Optional
` Maximum 60V on SW Node with RDS(ON) Sensing
` ±1.5% Voltage Reference Accuracy
` Current Mode Operation for Excellent Line and Load Transient Response
` Low Quiescent Current: 300A
` Low Profi le (1mm) ThinSOTTM and (0.75mm) 2mm * 3mm DFN Package


Application

· Telecom Power Supplies
· 42V and 12V Automotive Power Supplies
· Portable Electronic Equipment


Pinout

Connection Diagram


Specifications

VCC to GND
    Low Impedance Source ......................... 0.3V to 9V
    Current Fed .........................................25mA Into VCC
RUN/SS ....................................................... 0.3V to 9V
IPRG Voltage ................................0.3V to (VCC + 0.3V)
VFB, ITH Voltages ................................... 0.3V to 2.4V
SW Voltage ...............................................0.3V to 60V
Operating Temperature Range (Note 2)....40 to 85
Junction Temperature (Note 3) ............................. 125
Storage Temperature Range ..................65 to 125
Lead Temperature (Soldering, 10 sec)
    TS8 Package ..................................................... 300


Description

The LTC®3873 is a constant frequency current mode, boost, fl yback or SEPIC DC/DC controller that drives an N-channel power MOSFET in high input and output voltage converter applications. Soft-start can be programmed using an external capacitor.

The LTC3873 provides ±1.5% output voltage accuracy and consumes only 300A quiescent current during normal operation and only 55A during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873 can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less.

The LTC3873 is available in 8-lead ThinSOT and 2mm * 3mm DFN packages.




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