PPC5604BAMLL4R datasheet(55/109 Pages) NXP

55 / 109 page

Package pinouts and signal descriptions

MPC5604B/C Microcontroller Data Sheet, Rev. 15

NXP Semiconductors

The

|ΔVDD(STDBY)| and dVDD(STDBY)/dt system requirement can be used to define the component used

for the VDD supply generation. The following two examples describe how to calculate capacitance size:

Example 1. No regulator (worst case)

The

|ΔVDD(STDBY)| parameter can be seen as the VDD voltage drop through the ESR resistance of the

regulator stability capacitor when the IDD_BV current required to load VDD_LV domain during the standby

exit. It is thus possible to define the maximum equivalent resistance ESRSTDBY(MAX) of the total

capacitance on the VDD supply:

ESRSTDBY(MAX) = |ΔVDD(STDBY)|/IDD_BV = (30 mV)/(300 mA) = 0.1Ω 1

The dVDD(STDBY)/dt parameter can be seen as the VDD voltage drop at the capacitance pin (excluding

ESR drop) while providing the IDD_BV supply required to load VDD_LV domain during the standby exit. It

is thus possible to define the minimum equivalent capacitance CSTDBY(MIN) of the total capacitance on

the VDD supply:

CSTDBY(MIN) = IDD_BV/dVDD(STDBY)/dt = (300 mA)/(15 mV/µs) = 20 µF

This configuration is a worst case, with the assumption no regulator is available.

IULPREG

SR — Ultra low power regulator current

provided to VDD_LV domain

——

—

IULPREGINT

CC D Ultra low power regulator module

current consumption

IULPREG = 5 mA;

TA = 55 °C

——

100

µA

IULPREG = 0 mA;

TA = 55 °C

—

2—

IDD_BV

CC D In-rush average current on VDD_BV

during power-up5

——

—

3006

1 V

DD = 3.3 V ± 10% / 5.0 V ± 10%, TA = −40 to 125 °C, unless otherwise specified

2 This capacitance value is driven by the constraints of the external voltage regulator supplying the V

DD_BV voltage.

A typical value is in the range of 470 nF.

3 This value is acceptable to guarantee operation from 4.5 V to 5.5 V

4 External regulator and capacitance circuitry must be capable of providing I

DD_BV while maintaining supply VDD_BV

in operating range.

5 In-rush average current is seen only for short time (maximum 20 µs) during power-up and on standby exit. It is

dependant on the sum of the CREGn capacitances.

6 The duration of the in-rush current depends on the capacitance placed on LV pins. BV decoupling capacitors must

be sized accordingly. Refer to IMREG value for minimum amount of current to be provided in cc.

1. Based on typical time for standby exit sequence of 20 µs, ESR(MIN) can actually be considered at ~50 kHz.

Table 25. Voltage regulator electrical characteristics (continued)

Symbol

Parameter

Conditions1

Value

Unit

Min

Typ

Max

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