LTC3603

PRODUCTION

2.5A, 15V Monolithic Synchronous Step-Down Regulator

Data Sheet Product Selection Table
Part Models
8
1ku List Price
Starting From $3.89
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Part Details

  • Wide Input Voltage Range: 4.5V to 15V
  • 2.5A Output Current
  • Low RDS(ON) Internal Switches: 45mΩ and 85mΩ
  • Programmable Frequency: 300kHz to 3MHz
  • Low Quiescent Current: 75μA
  • 0.6V ±1% Reference Allows Precise,
  • Low Output Voltage
  • 99% Maximum Duty Cycle
  • Adjustable Burst Mode® Clamp
  • Synchronizable to External Clock
  • Power Good Output Voltage Monitor
  • Overtemperature Protection
  • Overvoltage Protection
  • Available in 16-Lead Thermally Enhanced MSOP and 4mm × 4mm QFN Packages
LTC3603
2.5A, 15V Monolithic Synchronous Step-Down Regulator
3.3V, 2.5A, 1MHz Step-Down Regulator Efficiency and Power Loss vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

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
Low Power Comparators 1
LTC1540
PRODUCTION Nanopower Comparator with Reference
Silicon Oscillators 1
LTC6909
PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3603

LTpowerCAD 2

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
schematic 1
DC1445A

LTC3603EMSE Demo Board (MSOP) | 2.5A, 15V, Monolithic Synchronous Step-Down Regulator

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Product Details

Demonstration circuit 1445A is a step-down converter, using the LTC3603EMSE monolithic synchronous buck regulator in the MSOP package. The DC1445A has an input voltage range of 4.5V to 15V, and is capable of delivering up to 2.5A of output current. The output voltage of the DC1445A can be set as low as 0.6V, the reference voltage of the LTC3603EMSE. At low load currents, the DC1445A can operate in either noise sensitive applications, due to the capability of the LTC3603EMSE to operate in pulse-skipping mode, or in high efficiency applications, because the LTC3603EMSE can also operate in Burst Mode®.

eval board
schematic 2
DC1442A

LTC3603EUF Demo Board (QFN) | 2.5A, 15V, Monolithic Synchronous Step-Down Regulator

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Product Details

Demonstration circuit 1442A is a step-down converter, using the LTC3603EUF monolithic synchronous buck regulator in the 4 × 4 QFN package. The DC1442A has an input voltage range of 4.5V to 15V, and is capable of delivering up to 2.5A of output current. The output voltage of the DC1442A can be set as low as 0.6V, the reference voltage of the LTC3603EUF. At low load currents, the DC1442A can operate in either noise sensitive applications, due to the capability of the LTC3603EUF to operate in pulse-skipping mode, or in high efficiency applications, because the LTC3603EUF can also operate in Burst-Mode®. Because of the high switching frequency of the LTC3603EUF, which is programmable up to 3 MHz, the DC1442A uses low profile surface mount components.
DC1445A
LTC3603EMSE Demo Board (MSOP) | 2.5A, 15V, Monolithic Synchronous Step-Down Regulator
DC1445A - Schematic
DC1442A
LTC3603EUF Demo Board (QFN) | 2.5A, 15V, Monolithic Synchronous Step-Down Regulator
DC1442A - Schematic

Reference Designs

DK-DEV-5CGXC7NES Dev Kit
DK-DEV-5CGXC7NES Dev Kit
LTC Parts List
DK-DEV-5CGXC7NES Block Diagram
DK-DEV-5CGXC7NES Block Diagram
DK-DEV-5CGXC7NES Power Tree
Altera Cyclone V GX Development Kit (Discontinued) Circuits from the lab

View Detailed Reference Design

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
Altera Cyclone V GX Development Kit (Discontinued)
DK-DEV-5CGXC7NES Dev Kit
LTC Parts List
DK-DEV-5CGXC7NES Block Diagram
DK-DEV-5CGXC7NES Block Diagram
DK-DEV-5CGXC7NES Power Tree

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