LT1578-2.5_1154784

Features: 1.5A Switch Current High Efficiency-Low Loss 0.2W SwitchConstant 200kHz Switching Frequency 4V to 15V Input VoltageRange Minimum Output: 1.21V Low Supply Current: 1.9mALow Shutdown Current: 20mA Easily Synchronizable Up to 400kHz Cycle-by-Cycle Current Limit Reduced EMI GenerationLow Th...

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SeekIC No. : 004400701 Detail

LT1578-2.5_1154784: Features: 1.5A Switch Current High Efficiency-Low Loss 0.2W SwitchConstant 200kHz Switching Frequency 4V to 15V Input VoltageRange Minimum Output: 1.21V Low Supply Current: 1.9mALow Shutdown Curren...

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Part Number:
LT1578-2.5_1154784
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:

  1.5A Switch Current
  High Efficiency-Low Loss 0.2W Switch
 Constant 200kHz Switching Frequency
  4V to 15V Input VoltageRange
  Minimum Output: 1.21V
  Low Supply Current: 1.9mA
 Low Shutdown Current: 20mA
  Easily Synchronizable Up to 400kHz
  Cycle-by-Cycle Current Limit
  Reduced EMI Generation
 Low Thermal Resistance SO-8 Package
  Uses Small Low Value Inductors



Application

Portable Computers
Battery-Powered Systems
Battery Chargers
 Distributed Power Systems



Pinout

  Connection Diagram


Specifications

Input Voltage .......................................................... 16V
BOOST Pin Above Input Voltage ............................. 10V
SHDN Pin Voltage ..................................................... 7V
SENSE Pin Voltage .................................................... 4V
FB Pin Voltage (Adjustable Part) ............................ 3.5V
FB Pin Current (Adjustable Part) ............................ 1mA
SYNC Pin Voltage ..................................................... 7V
Operating Junction Temperature Range
LT1578C ............................................... 0°C to 125° C
LT1578I ........................................... 40°C to 125°C
Storage Temperature Range ................ 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C



Description

The LT 1578 is a 200kHz monolithic buck mode switching regulator. A 1.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. The topology is current mode for fast transient response and good loop stability. The LT1578 is a modified version of the LT1507 that has been optimized for noise sensitive applications. It will operate over a 4V to 15V input range. In addition, the reference voltage has been lowered to allow the device to produce output voltages down to 1.2V. Quiescent current has been reduced by a factor of two. Switch on resistance has been reduced by 30%. Switch transition times have been slowed to reduce EMI generation.

The oscillator frequency of LT1578 has been reduced to 200kHz maintain high efficiency over a wide output current range. The pinout has been changed to improve PC layout by allowing the high current, high frequency switching circuitry to be easily isolated from low current, noise sensitive control circuitry.

The new SO-8 package includes a fused ground lead that significantly reduces the thermal resistance of the device to extend the ambient operating temperature range. Standard surface mount external parts can be used including the inductor and capacitors.




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