DFE252012PD-2R2M datasheet(13/54 Pages) TI

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8.3.2 Adjustable VO Operation (External Voltage Divider)

If the device is configured to operate in classical adjustable VO operation, the FB/VSET pin is used as the

feedback pin and must sense VO through an external divider network. Figure 8-2 shows the typical schematic for

this configuration.

VIN

3 V to 10 V

VIN

MODE/

S-CONF

VOS

FB/

VSET

4.7 F

22 F

2.2 µH

VOUT

0.6 V to 5.5 V

GND

Figure 8-2. Adjustable VO Operation Schematic

8.3.3 Selectable VO Operation (VSET and Internal Voltage Divider)

If the device is configured to VSET operation, the device interprets the VSET pin value following the MODE/

S-CONF readout (see Figure 8-3). There is no further interpretation of the VSET pin during operation and the

output voltage cannot be changed afterward without toggling the EN pin.

Figure 8-3 shows the typical schematic for this configuration, where VO is directly sensed at the VOS pin of the

device. VO is sensed only through the VOS pin by an internal resistor divider. The target VO is programmed by

an external resistor connected between VSET and GND (see Table 8-2).

VIN

3 V to 10 V

VIN

MODE/

S-CONF

VOS

FB/

VSET

4.7 F

22 F

2.2 µH

VOUT

0.4 V to 5.5 V

GND

Figure 8-3. Selectable VO Operation Schematic

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TPS629211-Q1

SLVSGD0A – MARCH 2022 – REVISED MARCH 2023

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