LTC3302
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3302

5V, 2A Synchronous Step-Down Regulator in 2mm × 2mm FCQFN

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 7
1ku List Price Starting From $1.08
Features
  • High Efficiency: 30mΩ NMOS, 85mΩ PMOS
  • Peak Current Mode Control
    • 27ns Minimum On-Time
    • Wide Bandwidth, Fast Transient Response
  • Low-Ripple Burst Mode® Operation with IQ of 80μA
  • Up to 6MHz Operation
  • Safely Tolerates Inductor Saturation in Overload
  • VIN Range: 2.25V to 5.5V
  • Fixed VOUT Range: 0.5V to 3.65V, Factory Programmed in 50mV Steps
  • VOUT Accuracy: ±1% Overtemperature Range
  • Precision 400mV Enable Threshold
  • Shutdown Current: 1μA
  • Power Good, Internal Compensation and Soft-Start
  • Thermally Enhanced, 12-Pin, 2mm × 2mm, Flip Chip (FCQFN) Package with Side Wettable Flanks
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC3302 is a very small, high efficiency, low noise, monolithic synchronous 2A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control, this regulator achieves fast transient response with small external components.

The LTC3302 operates in forced continuous or pulse-skipping mode for low noise, or in low-ripple Burst Mode operation for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. The adjustable version operates from 500mV to VIN with two additional external resistors. Other features include output overvoltage protection, short-circuit protection, thermal shutdown, clock synchronization, and up to 100% duty cycle operation for low dropout.

The LTC3302 is available in a low profile 2mm × 2mm FCQFN package with exposed pad and side wettable flanks.

APPLICATIONS

  • Optical Networking, Servers, Telecom
  • Automotive, Industrial, Communications
  • Distributed DC Power Systems (POL)
  • FPGA, ASIC, μP Core Supplies
Part Models 7
1ku List Price Starting From $1.08

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3302AJUCM#WTRPBF
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LTC3302AJUCM-1#WTRPBF
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LTC3302AJUCM-1.2#WTRPBF
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LTC3302AJUCM-1.8#WTRPBF
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LTC3302ARUCM#TRPBF
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LTC3302CJUCM#WTRPBF
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LTC3302CRUCM#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC3251A

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

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DC3251A

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

Evaluating the LTC3302A, 3.3 V to 1.2 V at 2 A, 2 MHz Synchronous Step-Down Regulator in a 2 mm × 2 mm SWF FCQFN

Features and Benefits

  • LTC3302A evaluation board
  • Transient circuit included for load-transient evaluation
  • EMI filter included to reduce noise in EMI emission tests

Product Detail

Demonstration Circuit DC3251A features the LTC3302A, 5 V, 2 A synchronous step-down silent switcher operating as a 2 MHz, 3.3 V to 1.2 V, 2 A buck regulator. The LTC3302A supports adjustable output voltages from 0.5 V to VIN. The LTC3302A is a compact, high efficiency, and high-speed synchronous monolithic step-down switching regulator. A minimum on-time of 27 ns enables high VIN to low VOUT conversion.

The DC3251A operating mode can be selected as Burst Mode operation, skip (PS) or forced continuous (FC) mode. Setting JP1 to the SKIP position allows the LTC3302A to sync to a clock frequency from 1.6 MHz to 2.4 MHz. The LTC3302A operates in forced continuous mode when syncing to an external clock.

The DC3251A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section. The red lines in the EMI performance graphs show the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3302A data sheet gives a complete description of the device, operation, and application information. Full specifications on the LTC3302A are available in the LTC3302A data sheet available from Analog Devices, Inc., and must be consulted with the user guide when using the DC3251A evaluation board. The LTC3302A is assembled in a 2 mm × 2 mm FCQFN package with side wettable flanks (SWF) for visual solder inspection. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

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.

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