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Manufacturer Part #


SP6669 Series 1.8 MHz 600 mA Synchronous Step Down Converter - SOT-23-5

Product Specification Section
Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 2.5V to 6V
Output Current-Max: 0.6A
Output Voltage Range: 0.6V to 5V
Output Type: Adjustable
Switching Frequency-Max: 1.8MHz
Operating Temp Range: -40°C to +85°C
Efficiency: 95%
No. of Outputs: 1
Quiescent Current: 200µA
Storage Temperature Range: -65°C to +150°C
Load Regulation (%): 0.5%
Moisture Sensitivity Level: 1
Package Style:  SOT-23-5 (SOT-25)
Mounting Method: Surface Mount
Features & Applications

The SP6669 is a 600 mA synchronous buck converter using a constant frequency current mode architecture with pulse width modulation (PWM) for low output voltage ripple and fixed frequency noise, a pulse skip mode (PSM) for light load efficiency and a LDO mode for 100% duty cycle. With a 2.5 V to 5.5 V input voltage range and a 1.5 MHz switching frequency, the SP6669 allows the use of small surface mount inductors and capacitors ideal for battery powered portable applications.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6 V feedback reference voltage. The SP6669 is available in an adjustable output voltage version, using an external resistor divider circuit, as well as fixed output voltage versions of 1.2 V, 1.5 V and 1.8 V. The SP6669 is available in a 5 pin SOT-23 package.


  • Up to 600 mA Output Current
  • Up to 95% Efficiency
  • 1.5 MHz Constant Frequency Operation
  • Low Dropout Operation Mode: 100% Duty Cycle
  • Output Voltages as Low as 0.6 V
  • No Schottky Diode Required
  • 200 uA Quiescent Current (no load)
  • Excellent Line and Load Transient Response
  • Over-Temperature Protection
  • 2.5 V to 5.5 V Input Voltage Range
  • Lead Free SOT23-5 Package


  • Cellular Phones
  • Wireless Networking
  • Digital Cameras
  • Portable Media Players
  • Bluetooth Devices
  • Portable Instruments

Learn more about the SP6669 family of Current Mode Controllers

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