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LTC3409 - 600mA Low Vin Buck Regulator

General Description

The LTC®3409 is a high efficiency, monolithic synchronous buck regulator using a constant frequency, current mode architecture.

The output voltage is adjusted via an external resistor divider.

Fixed switching frequencies of 1.7MHz and 2.6MHz are supported.

Key Features

  • 1.6V to 5.5V Input Voltage Range.
  • Internal Soft-Start.
  • Selectable 1.7MHz or 2.6MHz Constant Frequency Operation.
  • Internal Oscillator can be Synchronizable to an External Clock, 1MHz to 3MHz Range.
  • High Efficiency: Up to 95%.
  • Very Low Quiescent Current: Only 65μA During Burst Mode® Operation.
  • 600mA Output Current (VIN = 1.8V, VOUT = 1.2V).
  • 750mA Peak Inductor Current.
  • No Schottky Diode Required.
  • Low Dropout Operation: 100% Duty Cycle.
  • 0.613V.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LTC3409 600mA Low VIN Buck Regulator in 3mm × 3mm DFN FEATURES ■ 1.6V to 5.5V Input Voltage Range ■ Internal Soft-Start ■ Selectable 1.7MHz or 2.6MHz Constant Frequency Operation ■ Internal Oscillator can be Synchronizable to an External Clock, 1MHz to 3MHz Range ■ High Efficiency: Up to 95% ■ Very Low Quiescent Current: Only 65μA During Burst Mode® Operation ■ 600mA Output Current (VIN = 1.8V, VOUT = 1.2V) ■ 750mA Peak Inductor Current ■ No Schottky Diode Required ■ Low Dropout Operation: 100% Duty Cycle ■ 0.613V Reference Voltage ■ Stable with Ceramic Capacitors ■ Shutdown Mode Draws <1μA Supply Current ■ Current Mode Operation for Excellent Line and Load Transient Response ■ Overtemperature Protection ■ Available in a Low Profile (0.