TPS65073x DCDC3 Vout Range @ 1.5A

Jehangir Parvereshi

Intellectual 510 points

Other Parts Discussed in Thread: TPS65070

Can any member of the TPS65073x family source following Vout on DCDC3?

Condition: TPS65073x running off 1 cell Li-Ion battery
- Vout range: 3.4-3.8V @ 1.5A
Condition: TPS65073x running off 5V DC supply
- Vout range: 3.4 - 4.2V @ 1.5A

Thanks

-JP

over 14 years ago

0 Daniel Acevedo over 14 years ago

TI__Genius 17240 points

Please see the table labeled ordering information on page 2 of any of the TPS6507x datasheets.

0 Jehangir Parvereshi over 14 years ago in reply to Daniel Acevedo

Intellectual 510 points

Table on page-2 lists default values. The question earlier is referring to the adjustable Vout range for DCDC2 & DCDC3 as listed in tables on page-5 & 6.

The table states that the Vout range can be adjusted with an external resistor divider in the range 0.6 - Vin. Since Vin is connected to the power path SYS pin, the

potential Vout range will depend on the presence of AC/USB power and battery. Please confirm if the TPS65070 can provide the Vout range on DCDC3 as stated in earlier thread.

Thanks,

-JP

0 Daniel Acevedo over 14 years ago in reply to Jehangir Parvereshi

TI__Genius 17240 points

The TPS65070 can, by default, supply 1.5A at 3.3V on DCDC2 if DEFDCDC2 = HIGH.

DCDC3 can supply 1.5A at 3.3V by setting DEFDCDC[5:0] = 111111 and by connecting VDCDC3 to VOUT3 or by setting DEFDCDC[7] =1 and connecting an external resistor divider from VOUT3 to VDCDC3. This applies to DCDC1,2,3.

0 Jehangir Parvereshi over 14 years ago in reply to Daniel Acevedo

Intellectual 510 points

This does not address the question on the upper bound of the Vout range: 0.6 - Vin under the 2 conditions stated in an earlier thread.

-JP

0 Daniel Acevedo over 14 years ago in reply to Jehangir Parvereshi

TI__Genius 17240 points

I misread your question. DCDC2,3 of the TPS65070 can supply 1.5A at 3.4V, 3.8V or 4.2V with sufficient AC,USB or BAT when DEFDCDC#[7] =1 and an external resistor divider is connected from VOUT# to VDCDC#; however, this wont be dynamically adjustable.

0 Jehangir Parvereshi over 14 years ago in reply to Daniel Acevedo

Intellectual 510 points

We don't need the Vout to be on-the-fly adjustable.

What's the voltage drop @ 1.5A in the power path when the device is being powered by either of the following:

1 cell LI-on battery
AC/USB

- JP

0 Daniel Acevedo over 14 years ago in reply to Jehangir Parvereshi

TI__Genius 17240 points

The power path voltage drop is specified in the datasheet for AC (Isys=1A), BAT (Isys=1A) and USB (Isys=500mA and 800mA):

Power management

Power management forum

TPS65073x DCDC3 Vout Range @ 1.5A