LT1521-3.3

Features: ` Dropout Voltage: 0.5V` Output Current: 300mA` Quiescent Current: 12A` No Protection Diodes Needed` Adjustable Output from 3.8V to 20V` Fixed Output Voltages: 3V, 3.3V, 5V` Controlled Quiescent Current in Dropout` Shutdown IQ = 6A` Reverse Battery Protection` No Reverse Current` Thermal...

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LT1521-3.3 Picture
SeekIC No. : 004400668 Detail

LT1521-3.3: Features: ` Dropout Voltage: 0.5V` Output Current: 300mA` Quiescent Current: 12A` No Protection Diodes Needed` Adjustable Output from 3.8V to 20V` Fixed Output Voltages: 3V, 3.3V, 5V` Controlled Qui...

floor Price/Ceiling Price

Part Number:
LT1521-3.3
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:

` Dropout Voltage: 0.5V
` Output Current: 300mA
` Quiescent Current: 12 A
` No Protection Diodes Needed
` Adjustable Output from 3.8V to 20V
` Fixed Output Voltages: 3V, 3.3V, 5V
` Controlled Quiescent Current in Dropout
` Shutdown IQ = 6 A
` Reverse Battery Protection
` No Reverse Current
` Thermal Limiting



Application

· Low Current Regulator
· Regulator for Battery-Powered Systems
· Post Regulator for Switching Supplies



Pinout

  Connection Diagram


Specifications

Input Voltage ....................................................... ± 20V*
Output Pin Reverse Current ................................... 10mA
Adjust Pin Current .................................................. 10mA
Shutdown Pin Input Voltage (Note 1) ......... 6.5V, 0.6V
Shutdown Pin Input Current (Note 1) ...................... 5mA
Output Short-Circuit Duration .......................... Indefinite
Storage Temperature Range ...............65°C to 150°C
Operating Junction Temperature Range (Note 2)
Commercial .............................................. 0°C to 125°C
Industrial ............................................ 40°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
*For applications requiring input voltage ratings greater than 20V, contact the factory.



Description

The LT®1521/LT1521-3/LT1521-3.3/LT1521-5 are low dropout regulators with micropower quiescent current and shutdown. These devices are capable of supplying 300mA of output current with a dropout voltage of 0.5V. Designed for use in battery-powered systems, the low quiescent current, 12 A operating and 6 A in shutdown, makes them an ideal choice. The quiescent current is well controlled; it does not rise in dropout as it does with many other low dropout PNP regulators.

Other features of the LT1521/LT1521-3/LT1521-3.3/  LT1521-5 include the ability to operate with very small output capacitors. They are stable with only 1.5 F on the output while most older devices require between 10mF and 100 F for stability. Small ceramic capacitors can be used, enhancing manufacturability. Also, the input may be connected to voltages lower than the output voltage, including negative voltages, without reverse current flow from output to input. This makes the LT1521 series ideal for backup power situations where the output is held high and the input is low or reversed. Under these conditions only 5 A will flow from the output pin to ground.




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