STM32H7B3AI datasheet(94/238 Pages) STMICROELECTRONICS

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Table 33. Inrush current and inrush electric charge characteristics for LDO and SMPS

The typical values are given for VDDLDO = VDDSMPS = 3.3 V and for typical decoupling capacitor values of CEXT and COUT.

The product consumption on VDDCORE is not taken into account in the inrush current and inrush electric charge.

Symbol

Parameter

Conditions

Min Typ

Max

Unit

IRUSH

Inrush current on voltage regulator power-on

(POR or wakeup from Standby)

on VDDLDO(1)

96 (2)

on VDDSMPS(3) SMPS supplies the VDDCORE

92(4)

Inrush current on voltage regulator power-on

(POR)

on VDDSMPS(3)

SMPS supplies internal LDO VOUT =

1.8 V(5)

135(4)

SMPS supplies internal LDO VOUT =

2.5 V(5)

100(4)

SMPS supplies external circuit VOUT

= 1.8 V(5)

70(4)

SMPS supplies external circuit VOUT

= 2.5 V(5)

50(4)

Inrush current on voltage regulator power-on

(wakeup from Standby)

on VDDSMPS(3)

SMPS supplies internal LDO VOUT =

1.8 V

200(4)

SMPS supplies internal LDO VOUT =

2.5 V

210(4)

QRUSH

Inrush current on voltage regulator power-on

(POR or wakeup from Standby)

on VDDLDO(1)

4.4

5.3(2)

μC

on VDDSMPS(3) SMPS supplies the VDDCORE

2.9

7(2)

Inrush current on voltage regulator power-on

(POR)

on VDDSMPS(3)

SMPS supplies internal LDO VOUT =

1.8 V(5)

4.0

7.5(2)

SMPS supplies internal LDO VOUT =

2.5 V(5)

5.7(2)

SMPS supplies external circuit VOUT

= 1.8 V(5)

2.9

5.2(2)

SMPS supplies external circuit VOUT

= 2.5 V(5)

4(2)

Inrush current on voltage regulator power-on

(wakeup from Standby)

on VDDSMPS(3)

SMPS supplies internal LDO VOUT =

1.8 V

8.0

15(2)

SMPS supplies internal LDO VOUT =

2.5 V

14.5 20.5(2)

1. The inrush current and inrush electric charge on VDDLDO are not present in Bypass mode or when the SMPS supplies VDDCORE.

2. The maximum value is given for the maximum decoupling capacitor CEXT.

3. The inrush current and inrush electric charge on VDDSMPS is not present if the external component (L or COUT) is not present, that is if the

SMPS is not used.

4. The maximum value is given for the maximum decoupling capacitor COUT and the minimum VDDSMPS voltage.

5. The inrush current and inrush electric charge due to the transition from 1.2 V to the final VOUT value (1.8 V or 2.5 V) is not taken into

account.

STM32H7B3xI

Operating conditions

DS13139 - Rev 8

page 94/238

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