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LT3570

Features: ·2.5V to 36V Input Voltage Range·Programmable Switching Frequency from 500kHz to 2MHz·Synchronizable Up to 2.75MHz·VOUT(MIN): 0.8V·Independent Soft-Start for Each Converter·Separate VIN Supplies for Each Converter·Duty Cycle Range: 0% to 90% at 1MHz·Available in 24-Lead (4mm × 4mm) QFN a...

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SeekIC No. : 004401122 Detail

LT3570: Features: ·2.5V to 36V Input Voltage Range·Programmable Switching Frequency from 500kHz to 2MHz·Synchronizable Up to 2.75MHz·VOUT(MIN): 0.8V·Independent Soft-Start for Each Converter·Separate VIN Su...

LT3570 Data Sheet

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Part Number:
LT3570
Supply Ability:
5000

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

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Product Details

Description



Features:

·2.5V to 36V Input Voltage Range
·Programmable Switching Frequency from 500kHz to 2MHz
·Synchronizable Up to 2.75MHz
·VOUT(MIN): 0.8V
·Independent Soft-Start for Each Converter
·Separate VIN Supplies for Each Converter
·Duty Cycle Range: 0% to 90% at 1MHz
·Available in 24-Lead (4mm × 4mm) QFN and 20-Lead TSSOP Packages


Application

`Cable and Satellite Set-Top Boxes
` Automotive Systems
` Telecom Systems
`"Dying Gasp" Systems
` TFT LCD Displays


Pinout

Connection Diagram


Specifications

VIN1, VIN2, VIN3, VBIAS Voltage ................................40V
BOOST Voltage ........................................................60V
BOOST Pin Above SW2 ............................................25V
NPN_DRV Voltage ......................................................8V
SW1 Voltage ...........................................................40V
SHDN1, SHDN2, SHDN3 Voltage ..............................40V
SYNC, RT Voltage .......................................................3V
SS1, SS2 Voltage .......................................................3V
FB1, FB2, FB3 Voltage ..............................................10V
VC1, VC2 Voltage .......................................................3V
Maximum Junction Temperature........................... 125
Operating Temperature Range (Note 2).40 to 125
Storage Temperature Range
   TSSOP ............................................... 65 to 150
   QFN ................................................... 65 to 125
Lead Temperature (Soldering, 10 sec)
   TSSOP Only ...................................................... 300


Description

The LT®3570 is a buck and boost converter with internal power switches and LDO controller. Each converter is designed with a 1.5A current limit and an input range from 2.5V to 36V, making the LT3570 ideal for a wide variety of applications. Switching frequencies up to 2MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock up to 2.75MHz.

The LT3570 features a programmable soft-start function that limits the feedback voltage during start-up helping prevent overshoot and limiting inrush current. The LDO controller is capable of delivering up to 10mA of base current to an external NPN transistor.




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