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LTC3421

Features: ` Synchronous Rectification: Up to 96% Efficiency` True Output Disconnect`Inrush Current Limiting` Very Low Quiescent Current: 12A` Up to 1.5A Continuous Output Current` Fixed Frequency Operation Up to 3MHz` 0.5V to 4.5V Input Range` 2.4V to 5.25V Adjustable Output Voltage` Guaranteed 1V...

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SeekIC No. : 004402233 Detail

LTC3421: Features: ` Synchronous Rectification: Up to 96% Efficiency` True Output Disconnect`Inrush Current Limiting` Very Low Quiescent Current: 12A` Up to 1.5A Continuous Output Current` Fixed Frequency Op...

LTC3421 Data Sheet

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Part Number:
LTC3421
Supply Ability:
5000

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

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Upload time: 2024/12/21

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Product Details

Description



Features:

` Synchronous Rectification: Up to 96% Efficiency
` True Output Disconnect
`Inrush Current Limiting
` Very Low Quiescent Current: 12A
` Up to 1.5A Continuous Output Current
` Fixed Frequency Operation Up to 3MHz
` 0.5V to 4.5V Input Range
` 2.4V to 5.25V Adjustable Output Voltage
` Guaranteed 1V Start-Up
` Programmable Current Limit
` Programmable Soft-Start
` Synchronizable Oscillator
` Manual or Automatic Burst Mode® Operation
` Low-Battery Comparator
` <1A Shutdown Current
` 1.22V Reference Output Voltage
` Small (4mm* 4mm) Thermally Enhanced QFN Package


Application

· Handheld Computers
· Cordless Phones
· GPS Receivers
· Battery Backup Supplies


Pinout

Connection Diagram


Specifications

VIN, VOUT, VOUTS Voltage .......................... 0.3V to 6V
BURST, SHDN, SS, ENB, SW,
LBO, LBI, SYNC Voltages .......................... ...0.3V to 6V
Operating Temperature Range
(Notes 2, 5) .............................................. 40 to 85
Storage Temperature Range .................. 65 to 125
Lead Temperature (Soldering, 10 sec).................... 300


Description

The LTC®3421 is a high efficiency, current mode, fixed frequency, step-up DC/DC converter with true output disconnect and inrush current limiting. The device includes a 0.10  N-channel MOSFET switch and a 0.14  P-channel
synchronous rectifier. This product has the ability to simply program the output voltage, switching frequency, current limit, soft-start, Burst Mode threshold and loop compensation with external passive components.

Quiescent current of LTC3421 is only 12A during Burst Mode operation, maximizing battery life in portable applications. The oscillator frequency can be programmed up to 3MHz and can be synchronized to an external clock applied to the SYNC pin. An open-drain uncommitted low-battery comparator is included. The part maintains operation in applications with a secondary cell powering the output Voltage during shutdown.

Other features include: 1A shutdown, antiringing control, thermal limit and reference output.

The LTC3421 is available in a small 4mm*4mm QFN package.




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