LTC3615

PRODUCTION

Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter

Part Models
32
1ku List Price
Starting From $4.72
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Part Details

  • High Efficiency: Up to 94%
  • Dual Outputs with 2 × 3A Output Current Capability
  • Low Output Ripple Burst Mode® Operation: IQ = 130μA
  • 2.25V to 5.5V Input Voltage Range
  • ±1% Output Voltage Accuracy
  • Output Voltages Down to 0.6V
  • Programmable Slew Rate at Switch Pins
  • Low Dropout Operation: 100% Duty Cycle
  • Shutdown Current ≤1μA
  • Adjustable Switching Frequency Up to 4MHz
  • Internal or External Compensation
  • Selectable Pulse-Skipping/Forced Continuous/ Burst Mode Operation with Adjustable Burst Clamp
  • Optional Active Voltage Positioning (AVP) with Internal Compensation
  • Selectable 0°/90°/180° (LTC3615) or selectable 140°/180° (LTC3615-1) Phase Shift Between Channels
  • Fixed Internal and Programmable External Soft-Start
  • Accurate Start-Up Tracking Capability
  • DDR Memory Mode IOUT = ±1.5A
  • Available in 4mm × 4mm QFN-24 and eTSSOP-24 Packages
LTC3615
Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter
Efficiency and Power Loss vs Load Current Product Package 1 Product Package 2
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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
Dual-Supply Monitors 1
LTC2960 RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Single-Supply Monitors 1
LTC2935 PRODUCTION Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4365 RECOMMENDED FOR NEW DESIGNS Overvoltage, Undervoltage and Reverse Supply Protection Controller
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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
DC1572A

LTC3615EFE Demo Board (TSSOP) | 2.25V ≤ VIN ≤ 5.5V, VOUT1 = 1.8V to 3.3V @ 3A, VOUT2 = 1.2V to 1.8V @ 3A

Product Details

Demonstration circuit 1572 is a dual output regulator consisting of two constant-frequency step-down converters, based on the LTC3615 dual channel monolithic synchronous buck regulator in the TSSOP exposed pad package. The DC1572 has an input voltage range of 2.25V to 5.5V, with each regulator capable of delivering up to 3A of output current.

eval board
DC1435A

LTC3615EUF Demo Board (QFN) | 2.25V ≤ VIN ≤ 5.5V, VOUT1 = 1.8V to 3.3V @ 3A, VOUT2 = 1.2V to 1.8V @ 3A

Product Details

Demonstration circuit 1435 is a dual output regulator consisting of two constant-frequency step-down converters, based on the LTC3615 dual channel monolithic synchronous buck regulator in the 4mm × 4mm QFN-24 package. The DC1435 has an input voltage range of 2.25V to 5.5V, with each regulator capable of delivering up to 3A of output current. The DC1435 can operate in Burst Mode®, pulse-skip or forced continuous mode. In shutdown, the DC1435 requires less than 100 uA total. The DC1435 is a very efficient circuit: over 90% for either circuit. The LTC3615 comes in a 24 Pin QFN or leaded package, which each having an exposed pad on the bottom-side of the IC for better thermal performance.

DC1572A
LTC3615EFE Demo Board (TSSOP) | 2.25V ≤ VIN ≤ 5.5V, VOUT1 = 1.8V to 3.3V @ 3A, VOUT2 = 1.2V to 1.8V @ 3A
DC1572A - Schematic
DC1435A
LTC3615EUF Demo Board (QFN) | 2.25V ≤ VIN ≤ 5.5V, VOUT1 = 1.8V to 3.3V @ 3A, VOUT2 = 1.2V to 1.8V @ 3A
DC1435A - Schematic

Reference Designs

Stratix V Advanced System Development Board
Stratix V Advanced System Development Board 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
Stratix V Advanced System Development Board
Stratix V Advanced System Development Board
Stratix V Advanced System Development Board Block Diagram
Stratix V Advanced Systems Development Board Power Tree

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