DC1999A

DC1999A is a demonstration circuit featuring fixed frequency synchronous buck-boost converter with an extended input and output range. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below, or equal to the output voltage. The LTC®3111 features selectable PWM or Burst Mode® operation, and an easily synchronizable oscillator. Jumper JP1 is provided to enable the converter. The demo board is configured for 800KHz. A jumper, JP2, is provided to select PWM, or Burst Mode operation. A clock signal can also be applied to JP2 if synchronization is desired.

• LTC3111 operates with a 2.5V to 15V input voltage range and a VOUT range from 2.5V to 15V
• Demonstration board has been designed to operate with VIN from 2.5V to 15V
• Demonstration board output current up to 1.5A
• For VIN < 5V, IOUT capability is reduced, VOUT is set to 5.0V