LTC3530 - Wide Input Voltage Synchronous Buck-Boost DC/DC Converter

The L TC 3530 is a wide VIN range, highly ef, cient, , xed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, two-cell alkaline or NiMH applications where the output voltage is within the battery voltage range. The L TC3530 is pin compatible with the L TC3440 buck- boost DC/DC converter but adds programmable Automatic Burst Mode operation and extends the VIN/VOUT range to 1.8V . Switching frequencies up to 2MHz are programmed with an external resistor . Automatic Burst Mode operation allows the user to program the load current threshold for Burst Mode operation using a single resistor from the BURST pin to GND. By Linear Technology Corporation