LTC3543

PRODUCTION

600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum

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Part Details

  • 600mA Output Current
  • 2.5V to 5.5V Input Voltage Range
  • 2.25MHz Constant-Frequency Operation, Spread Spectrum or Synchronized PLL (1MHz to 3MHz)
  • High Efficiency: Up to 95%
  • 1A Peak Inductor Current
  • Very Low Quiescent Current: Only 45µA During Burst Mode Operation
  • No Schottky Diode Required
  • Low Dropout Operation: 100% Duty Cycle
  • Overtemperature Protected
  • Stable with Ceramic Capacitors
  • Shutdown Mode Draws <1µA Supply Current
  • ±2% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Soft-Start
  • Available in a Low Profi le (0.75mm) 2mm × 3mm 6-Lead DFN Package
LTC3543
600mA Synchronous Step Down Buck Regulator with PLL, Soft-Start and Spread Spectrum
Efficiency and Power Loss vs Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Oscillators 1
LTC6909
PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
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Switching Regulators & Controllers 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3543
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC1008A

LTC3543EDC8 Demo Board | 2.5V ≤ VIN ≤ 5.5V, VOUT = 1.8V @ 600mA

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Product Details

Demonstration circuit 1008 is a step-down converter, using the LTC3543 monolithic synchronous buck regulator. The DC1008 has an input voltage range of 2.5V to 5.5V, and is capable of delivering up to 600 mA of output current in a small 2mm × 3mm DFN package. The default output voltage of the DC1008 is 1.8V, but can be set as low as 0.6V, the reference voltage of the LTC3543.
DC1008A
LTC3543EDC8 Demo Board | 2.5V ≤ VIN ≤ 5.5V, VOUT = 1.8V @ 600mA
DC1008A - Schematic

Latest Discussions

4 Years Ago
LTC®︎3543 is damaged in field, used as FPGA & DDR 2.5V power supply
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