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LTC3429B

Features: `Up to 96% Efficiency`True Output Load Disconnect`Inrush Current Limiting and Internal Soft-Start`Low Voltage Start-Up: 0.85V`Automatic Burst Mode® Operation with IQ ~ 20A`Continuous Switching at Light Loads (LTC3429B)`Internal Synchronous Rectifier`Current Mode Control with Internal...

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LTC3429B: Features: `Up to 96% Efficiency`True Output Load Disconnect`Inrush Current Limiting and Internal Soft-Start`Low Voltage Start-Up: 0.85V`Automatic Burst Mode® Operation with IQ ~ 20A`Continuous S...

LTC3429B Data Sheet

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Part Number:
LTC3429B
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: 2024/11/23

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Product Details

Description



Features:

`Up to 96% Efficiency
`True Output Load Disconnect
`Inrush Current Limiting and Internal Soft-Start
`Low Voltage Start-Up: 0.85V
`Automatic Burst Mode® Operation with IQ ~ 20A
`Continuous Switching at Light Loads (LTC3429B)
`Internal Synchronous Rectifier
`Current Mode Control with Internal Compensation
`Short-Circuit Protection
`500kHz Fixed Frequency Switching
`Input Range: 0.5V to 4.4V
`Output Range: 2.5V to 4.3V (Up to 5V with Schottky)
`Shutdown Current: <1A
`Antiringing Control Minimizes EMI
`Tiny External Components
`Low Profile (1mm) SOT-23 Package


Application

·MP3 Players
·Digital Cameras
·LCD Bias Supplies
·Handheld Instruments
·Wireless Handsets
·GPS Receivers


Pinout

Connection Diagram


Specifications

VIN Voltage .............................................. 0.3V to 4.4V
SW Voltage ................................................. 0.3V to 6V
SHDN, FB Voltage ....................................... 0.3V to 6V
VOUT ........................................................... 0.3V to 6V
Operating Temperature Range (Note 2) .40°C to 85°C
Storage Temperature Range ................... 65°C to 150°
Lead Temperature (Soldering, 10 sec).................. 300°C


Description

The LTC®3429/LTC3429B are high efficiency synchronous, fixed frequency, step-up DC/DC converters with true output load disconnect, inrush current limiting and softstart in a low profile 6-lead ThinSOTTM package. These devices are capable of supplying 100mA from a single AA cell input or 250mA from a 2-cell AA with a 3.3V output.

A switching frequency of 500kHz minimizes overall solution  footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Current mode PWM control with internal compensation reduces external parts count thereby saving critical board real estate. The LTC3429 shifts automatically to power saving Burst Mode operation at light loads while the LTC3429B features continuous switching at light loads. Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode.

The LTC3429/LTC3429B  also feature low shutdown current of under 1A. The true output disconnect feature allows the output to be completely discharged in shutdown. It also limits the inrush of current during start-up, minimizing surge currents seen by the input supply.




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