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LTC3873-5

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` ±1.5% Voltage Reference Accuracy` Current Mode Operation for Excellent Line and Load Transient...

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SeekIC No. : 004402397 Detail

LTC3873-5: 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 Opti...

LTC3873-5 Data Sheet

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Part Number:
LTC3873-5
Supply Ability:
5000

Price Break

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

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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
` ±1.5% Voltage Reference Accuracy
` Current Mode Operation for Excellent Line and Load Transient Response
` 4.1V Undervoltage Threshold for Logic Level MOSFET Applications
` Low Quiescent Current: 300A
`Low Profi le (1mm) ThinSOTTM and (0.75mm) 2mm * 3mm DFN Package


Application

· Telecom Power Supplies
· Automotive Power Supplies
· PoE Applications





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
(Note 1)
Operating Temperature Range (Note 2)
   LTC3873E-5 ............................................. 40 to 85
   LTC3873I-5 ............................................ 40 to 125
Junction Temperature (Note 3) ................................. 125
Storage Temperature Range ..................... 65 to 125
Lead Temperature (Soldering, 10 sec)
   TS8 Package .......................................................... 300


Description

The LTC®3873-5 is a constant frequency current mode controller for boost, fl yback or SEPIC DC/DC converters designed to drive an N-channel MOSFET for high input and output voltage converter applications.

The LTC3873-5 provides ±1.5% output voltage accuracy and consumes only 300A quiescent current during normal operation and only 50A during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873-5 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. Soft-start can be programmed using an external capacitor.

The LTC3873-5 is available in 8-lead ThinSOT and 2mm * 3mm DFN packages.




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