LTC3568

PRODUCTION

1.8A, 4MHz, Synchronous Step-Down DC/DC Converter

Part Models
4
1ku List Price
Starting From $3.54
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Part Details

  • Uses Tiny Capacitors and Inductor
  • High Frequency Operation: Up to 4MHz
  • Low RDS(ON) Internal Switches: 0.110Ω
  • High Efficiency: Up to 96%
  • Stable with Ceramic Capacitors
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Short-Circuit Protected
  • Low Dropout Operation: 100% Duty Cycle
  • Low Shutdown Current: IQ ≤ 1μA
  • Low Quiescent Current: 60μA
  • Output Voltages from 0.8V to 5V
  • Selectable Burst Mode® Operation
  • Sychronizable to External Clock
  • Small 3mm × 3mm, 10-Lead DFN Package
LTC3568
1.8A, 4MHz, Synchronous Step-Down DC/DC Converter
Figure 1.  Step-Down 1.8A Regulator Efficiency	 vs Load Current Product Package 1
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Documentation

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2974 RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Multiple Output Buck Regulators 1
LTC3880 RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Silicon Oscillators 1
LTC6909 PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Single-Supply Monitors 1
LTC2935 PRODUCTION Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds
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Tools & Simulations

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.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.


Evaluation Kits

eval board
DC1206A

LTC3568EDD Demo Board | 2.25V ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V at 1.8A

Product Details

Demonstration circuit 1206 is a step-down converter, using the LTC3568 monolithic synchronous buck regulator. The DC1206 has an input voltage range of 2.25V to 5.5V, and is capable of delivering up to 1.8A of output current at a minimum input voltage of 2.25V. The output voltage of the DC1206 can be set as low as 0.8V, the reference voltage of the LTC3568. At low load currents, the DC1206 can operate in either noise sensitive applications, due to the capability of the LTC3568 to operate in pulse-skipping mode, or in high efficiency applications, because the LTC3568 can also operate in Burst-Mode®. During Burst-Mode® operation, the output ripple voltage is still low – less than 30 mV – due to the improvements made in the design of the LTC3568.

DC1206A
LTC3568EDD Demo Board | 2.25V ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V at 1.8A
DC1206A - Schematic

Reference Designs

LaywerScape Q or IQ - LS1043RDB
NXP (Freescale) QorIQ LS1043A-RDB Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
NXP (Freescale) QorIQ LS1043A-RDB
LaywerScape Q or IQ - LS1043RDB
QorIQ LS1043A Power Tree

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