TPS65217C 3.3V out on DCDC3

mans.andersson

Other Parts Discussed in Thread: TPS65217

Reading the data sheet for the TPS65217 I've noticed that the maxium output for DCDC3 is set to 1.5V with a note that other configurations might be available after contact with TI (page 9). However, the register DEFDCDC3 allows setting the output to 3.3V and when I tried doing that it worked.

Are there any implications we should know about regarding setting DCDC3 to 3.3V instead of the listed 1.5V?

// Måns

over 8 years ago

0 Richard Solarski over 8 years ago

TI__Genius 10885 points

Hi Mans,

DCDC3 has a limited selection of default voltages, but once the PMIC is active users can utilize the full range via i2c. All settings configured over i2c will be lost once the device is reset.

0 mans.andersson over 8 years ago in reply to Richard Solarski

Intellectual 540 points

Is this also true for DCDC1 which has a similar note in the data sheet?

0 Richard Solarski over 8 years ago in reply to mans.andersson

TI__Genius 10885 points

Hi Mans,

Yes, the way the EEPROM is mapped within the device, DEFDCDC1 and DEFDCDC2 cannot utilize the LSB (Bit 0), for default voltage values.

This means that every other voltage value is a possible default value for DCDC1 and DCDC2, and if additional precision is needed one could adjust by 150mV through i2c after the PMIC is active.

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TPS65217C 3.3V out on DCDC3