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LT3742

Features: ` Wide Input Voltage Range: 4V to 30V` Wide Output Voltage Range: 0.8V to VIN` Low Shutdown IQ: 20A` Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise` 0.8V ±1.5% Voltage Reference` 500kHz Current Mode Fixed Frequency Operation` Internal Boost Conv...

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SeekIC No. : 004401147 Detail

LT3742: Features: ` Wide Input Voltage Range: 4V to 30V` Wide Output Voltage Range: 0.8V to VIN` Low Shutdown IQ: 20A` Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noi...

LT3742 Data Sheet

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Part Number:
LT3742
Supply Ability:
5000

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

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Product Details

Description



Features:

` Wide Input Voltage Range: 4V to 30V
` Wide Output Voltage Range: 0.8V to VIN
` Low Shutdown IQ: 20A
` Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
` 0.8V ±1.5% Voltage Reference
` 500kHz Current Mode Fixed Frequency Operation
` Internal Boost Converter Provides Bias Rail for N-Channel MOSFET Gate Drive
` Power Good Voltage Monitor for Each Output
` Programmable Soft-Start
` 24-Lead 4mm * 4mm * 0.75mm Package


Application

· Satellite and Cable TV Set-Top Boxes
· Distributed Power Regulation
· Automotive Systems
· Super Capacitor Charger


Pinout

Connection Diagram


Specifications

VIN Voltage ..........................................................30V
UVLO Voltage ......................................................30V
PG1, PG2 Voltage ................................................30V
SWB, BIAS Voltage ..............................................40V
SENSE1+, SENSE2+ Voltage ................................30V
SENSE1, SENSE2 Voltage ...............................30V
RUN/SS1, RUN/SS2 Voltage ....................................6V
FB1, FB2 Voltage ....................................................6V
VC1, VC2 Voltage ....................................................6V
Junction Temperature ....................................... 125
Operating Junction Temperature Range
(Note 2) ............................................. 40 to 125
Storage Temperature Range ............. 65 to 125


Description

The LT®3742 is a dual step-down DC/DC switching regulator controller that drives high side N-channel power MOSFETs. A 500kHz fi xed frequency current mode architecture provides fast transient response with simple loop compensation components and cycle-by-cycle current limiting. The output stages of the two controllers operate 180° out of phase to reduce the input ripple current, minimizing the noise induced on the input supply, and allowing less input capacitance.

An internal boost regulator generates a bias rail of VIN + 7V to provide gate drive for the N-channel MOSFETs allowing low dropout and 100% duty cycle operation. The LT3742 can be used for applications where both controllers need to operate independently, or where both controllers are used to provide a single higher current output.

The device is available in a thermally enhanced 4mm × 4mm QFN package.




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