LTC3603
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LTC3603

2.5A, 15V Monolithic Synchronous Step-Down Regulator

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Part Details
Part Models 8
1ku List Price Starting From $3.89
Features
  • 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
Additional Details
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The LTC3603 is a high efficiency, monolithic synchronous step-down DC/DC converter utilizing a constant-frequency, current mode architecture. It operates from an input voltage range of 4.5V to 15V and provides an adjustable regulated output voltage from 0.6V to 14.5V while delivering up to 2.5A of output current. The internal synchronous power switch with 45mΩ on-resistance increases efficiency and eliminates the need for an external Schottky diode. The switching frequency can either be set by an external resistor or synchronized to an external clock. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

The LTC3603 can be configured for either Burst Mode operation or forced continuous operation. Forced continuous operation reduces noise and RF interference, while Burst Mode operation provides the highest efficiency at light loads. In Burst Mode operation, external control of the burst clamp level allows the output voltage ripple to be adjusted according to the requirements of the application.

Applications

  • Point-of-Load Supplies
  • Portable Instruments
  • Communications Infrastructure
Part Models 8
1ku List Price Starting From $3.89

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Feb 4, 2020

- 20_0132

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3603EMSE#PBF

PRODUCTION

LTC3603EMSE#TRPBF

PRODUCTION

LTC3603IMSE#PBF

PRODUCTION

LTC3603IMSE#TRPBF

PRODUCTION

Feb 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

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PRODUCTION

LTC3603IUF#PBF

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LTC3603IUF#TRPBF

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Filter by Model

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Part Models

Product Lifecycle

PCN

Feb 4, 2020

- 20_0132

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3603EMSE#PBF

PRODUCTION

LTC3603EMSE#TRPBF

PRODUCTION

LTC3603IMSE#PBF

PRODUCTION

LTC3603IMSE#TRPBF

PRODUCTION

Feb 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3603EUF#PBF

PRODUCTION

LTC3603EUF#TRPBF

PRODUCTION

LTC3603IUF#PBF

PRODUCTION

LTC3603IUF#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC1445A

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

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DC1445A

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

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

Product Detail

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®.

reference details image

DC1442A

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

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DC1442A

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

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

Product Detail

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.

Tools & Simulations

Tools & Simulations 2

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.

Reference Designs

Reference Designs 1

DK-DEV-5CGXC7NES Dev Kit

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Circuits from the lab

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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
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