STW4510 datasheet(32/57 Pages) STMICROELECTRONICS

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Functional description

STw4510

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3.3.5

Vana2

This LDO is dedicated, for example, to supply an analog part of a peripheral associated to a

processor.

Main features

●

Programmable output voltage: Vana2_sel[1:0] pads 1.8 V, 2.8 V, 3.0 V, 3.3 V (to be

fixed in the application by routing to Vbat or ground). On the 4 mm x 4 mm package the

selection of output voltage values is limited to Sel[0] and the available voltage values

are 3.0 V and 3.3 V”

●

Three power domains:

–

High power mode, 150 mA full load

–

Sleep mode with a low current capability of 0.5 mA full load (

Table 21)

–

Power down mode when regulator is switched off and there is no power

consumption (pdn-vana2 bit of application control register (

Application control

08h), it is recommended to use only the pdn_vana2 control bit.

●

Default setting defined by start-up device configuration

●

Specification guaranteed with battery voltages from 2.7 V up to 5.5 V (with a minimum

battery voltage of 3.0 V for a LDO output of 2.8 V)

Note:

The definition of sleep mode is given in Section 3.2.3.

3.3.6

Vana3

This LDO is dedicated, for example, to supply a critical stage like a PLL of a processor or an

analog part of a peripheral associated to a processor

Main features

●

Programmable output voltage: Vana3_sel[1:0] pads - 1.8 V, 2.8 V, 3.0 V, 3.3 V (to be

fixed in the application by routing to Vbat or ground). ground. On the 4 mm x 4 mm

package the selection of output voltage values has been limited to Sel[0] and the

available voltage values are 3.0 V and 3.3 V.

●

Three power domains:

–

High power mode, 150 mA full load

–

Sleep mode with a low current capability of 0.5 mA full load (

Table 21)

–

Power down mode when regulator is switched off and there is no power

consumption (pdn-vana3 bit of application control register (

Application control

07h), it is recommended to use only the pdn_vana3 control bit.

●

Default setting defined by start-up configuration

●

Specification guaranteed with battery voltages from 2.7 V up to 5.5 V (with a minimum

battery voltage of 3.5V for a LDO output of 3.3 V with the full characteristics available)

Note:

The definition of sleep mode is given in Section 3.2.3.

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