LTC3542
Info: : PRODUCTION
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LTC3542

500mA, 2.25MHz Synchronous Step-Down DC/DC Converter

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $1.95
Features
  • High Efficiency: Up to 96%
  • High Peak Switch Current: 1000mA
  • Low Output Ripple (<20mVP-P Typical) Burst Mode Operation: Only 26µA
  • Very Low Quiescent Current: Only 26µA
  • 2.5V to 5.5V Input Voltage Range
  • 2.25MHz Constant Frequency Operation
  • 1MHz to 3MHz External Frequency Synchronization
  • Low Dropout Operation: 100% Duty Cycle
  • No Schottky Diode Required
  • Internal Soft-Start Limits Inrush Current
  • 0.6V Reference Allows Low Output Voltages
  • Shutdown Mode Draws <1µA Supply Current
  • ±2% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Available in 6-Lead 2mm × 2mm DFN and Small TSOT
Additional Details
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The LTC3542 is a high efficiency monolithic synchronous buck converter using a constant frequency, current mode architecture. Supply current during operation is only 26µA, dropping to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3542 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. The output voltage is adjustable from 0.6V to VIN. Internal power switches are optimized to provide high efficiency and eliminate the need for an external Schottky diode.

Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors, and it can synchronize to an external clock signal with a frequency range of 1MHz to 3MHz through the MODE/ SYNC pin. The LTC3542 is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The LTC3542 can be configured for the power saving Burst Mode® Operation. For reduced noise and RF interference, the MODE/SYNC pin can be configured for pulse skipping operation.

Applications

  • Cellular Telephones
  • Wireless and DSL Modems
  • Digital Cameras
  • MP3 Players
  • PDAs and Other Handheld Devices
Part Models 8
1ku List Price Starting From $1.95

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3542EDC#TRMPBF
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LTC3542EDC#TRPBF
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LTC3542ES6#TRMPBF
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LTC3542ES6#TRPBF
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LTC3542IDC#TRMPBF
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LTC3542IDC#TRPBF
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LTC3542IS6#TRMPBF
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LTC3542IS6#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC993A

LTC3542EDC Demo Board | 2.5 ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V @ 500mA

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DC993A

LTC3542EDC Demo Board | 2.5 ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V @ 500mA

LTC3542EDC Demo Board | 2.5 ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V @ 500mA

Product Detail

Demonstration circuit 993A is a step-down converter, using the LTC3542 monolithic synchronous buck regulator. The DC993A has an input voltage range of 2.5V to 5.5V, and is capable of delivering up to 500 mA of output current in a small 2x2 mm DFN package. The output voltage of the DC993A can be set as low as 0.6V, the reference voltage of the LTC3542.

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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