Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
The TPS6024x is a switched capacitor voltage converter for VCO and PLL applications providing low noise conversion and tight tolerances. It supports regulated output voltages of 2.7 V, 3 V and 3.3 V from a 1.8-V to 5.5-V input voltage range. The TPS60241 generates 5-V output voltage from an 2.7-V to 5.5-V input voltage range.
The complete charge pump circuitry requires no inductors and only four small ceramic capacitors.
The output voltage ripple depends on the capacitors used. Table 1 shows the dependence between output voltage ripple and capacitor selection.
|CI||CO||C1||C2||OUTPUT VOLTAGE RIPPLE
|1 µF||1 µF||1 µF||1 µF||288|
|2.2 µF||2.2 µF||1 µF||1 µF||212|
|4.7 µF||4.7 µF||1 µF||1 µF||183|
|4.7 µF||1 µF||1 µF||1 µF||272|
|1 µF||4.7 µF||1 µF||1 µF||185|
For the best output ripple performance, low-ESR ceramic capacitors are recommended (see Table 2).
|PART||MANUFACTURER||PART NUMBER||VALUE||TOLERANCE||DIELECTRIC MATERIAL||PACKAGE||RATED VOLTAGE|
|CI||Taiyo Yuden||LMK212BJ105KG–T||1 µF||10%||X7R||0805||10|
|CO||Taiyo Yuden||LMK212BJ105KG–T||1 µF||10%||X7R||0805||10|
|C1, C2||Taiyo Yuden||LMK212BJ105KG–T||1 µF||10%||X7R||0805||10|
|CF||Taiyo Yuden||LMK212BJ105KG–T||1 µF||10%||X7R||0805||10|
|NOTE: Scope triggered by voltage at flying capacitors, noise removed by averaging function and bandwidth limit 20 MHz.|
Standard application as a low noise boost converter. The device generates a regulated output voltage of 3.3 V from a 2-V supply with only 4 external 1-µF ceramic capacitors.