The LTC3530EMS#PBF is a wide input voltage synchronous buck-boost DC/DC Converter 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 LTC3530 is pin compatible with the LTC3440 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.
- Regulated output with input voltages above, below or equal to the output
- 250mA Continuous output current from 1.8V VIN
- 600mA Continuous/1A peak output current from Li-ion
- Single inductor
- Synchronous rectification up to 96% efficiency
- Programmable automatic Burst Mode? operation
- Output disconnect in shutdown
- Pin compatible with the LTC3440
- Programmable frequency from 300kHz to 2MHz
- <1μA Shutdown current
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