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Synchronous Buck Power Supply features programmable LDO.

Press Release Summary:

Supplied in 5 x 5 mm package, SC403 utilizes EcoSpeed(TM) architecture with pseudo-fixed frequency adaptive on-time control and features integrated power MOSFETs, bootstrap switch, and programmable LDO (200 mA). It operates from 3-28 V and offers internal or external bias voltage of 3-5 V. Along with various logic I/O control options, IC incorporates protections for over-voltage and under-voltage conditions as well as TC compensated RDS(ON) sensed current limit.

Original Press Release:

Semtech SC403

6A EcoSpeed(TM) Integrated FET Regulator with Programmable LDO

The SC403 is a stand-alone synchronous EcoSpeed(TM) buck power supply which incorporates Semtech's advanced patent-pending adaptive on-time control architecture to provide excellent light-load efficiency and fast transient response. It features integrated power MOSFETs, a bootstrap switch, and a programmable LDO in a 5x5mm package. The device is highly efficient and uses minimal PCB area.

  • Power System:
    - Input voltage - 3V to 28V
    - Internal or external bias voltage - 3V to 5V
    - Integrated bootstrap switch
    - Programmable LDO output - 200mA
  • 1% reference tolerance -40 to +85 °C
  • EcoSpeedTM architecture with pseudo-fixed frequency adaptive on-time control
  • Logic Input/Output Control:
    - Independent control EN for LDO and switcher
    - Programmable VIN UVLO threshold
    - Power good output
    - Selectable ultrasonic power save mode
    - Programmable soft start time
  • Protections:
    - Over-voltage and under-voltage
    - TC compensated RDS(ON) sensed current limit
  • Thermal shutdown
  • Any ESR - SP, POSCAP, OSCON, and ceramic capacitors
  • Package:
    - Lead-free package - 5x5mm, 32-pin MLPQ
    - Fully RoHS/WEEE compliant and halogen free

  • Office automation and computing
  • Networking and telecommunication equipment
  • Point of load power supplies and module replacement

  • MLPQ-32

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