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Analog Devices Inc. LTC3302 Synchronous Step-Down Regulators

Analog Devices Inc. LTC3302 Synchronous Step-Down Regulators are very small, high efficiency, low noise, monolithic synchronous 2A step-down DC/DC converters operating from a 2.25V to 5.5V input supply. The LTC3302 regulators achieve fast transient responses with small external components utilizing a constant frequency and peak current mode control. These voltage regulators are available in a low profile 2mm × 2mm FCQFN package with an exposed pad and side wettable flanks.

The LTC3302 components operate in forced continuous or pulse skipping mode for low noise or low-ripple Burst Mode operation for high efficiency at light loads. Operation in these modes makes the LTC3302 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.

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
  • Precision 400mV enable threshold
  • 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

Applications

  • Optical networking, servers, and telecom
  • Automotive, industrial, and communications
  • Distributed DC power systems (POL)
  • FPGA, ASIC, and µP core supplies

Specifications

  • Voltage ranges
    • 2.25V to 5.5V input (VIN)
    • 0.5V to 3.65V fixed output (VOUT) in factory-programmed 50mV steps with ±1% accuracy
  • 2.0V to 2.2V undervoltage lockout
  • 27ns (typical) minimum on-time
  • 0.25ms to 3ms soft-start duration
  • 100% maximum duty cycle
  • Default oscillator frequencies
    • 1.85MHz to 2.15MHz for LTC3302A
    • 5.55MHz to 6.45MHz for LTC3302C
  • 400mV enable threshold
  • 1µA shutdown current
  • ±20% frequency synchronization range
  • -40°C to +150°C operating junction temperature range

Typical Application

Application Circuit Diagram - Analog Devices Inc. LTC3302 Synchronous Step-Down Regulators

Block Diagram

Block Diagram - Analog Devices Inc. LTC3302 Synchronous Step-Down Regulators

Evaluation Board

Analog Devices Inc. DC3251A Evaluation Board

Features the LTC3302A synchronous step-down silent switcher operating as a 2MHz.

Learn Moretungkol sa Analog Devices Inc. DC3251A Evaluation Board View Productskaugnay ng Analog Devices Inc. DC3251A Evaluation Board
Inilathala: 2023-02-27 | Na-update: 2023-05-09