MPC5643L_11 datasheet(80/124 Pages) FREESCALE

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MPC5643L Microcontroller Data Sheet, Rev. 6

Preliminary—Subject to Change Without Notice

Electrical characteristics

Freescale Semiconductor

Figure 4. BCP68 board schematic example

NOTE

The combined ESR of the capacitors used on 1.2 V pins (V1V2 in the picture) shall be in

the range of 30 m to 150 m. The minimum value of the ESR is constrained by the

resonance caused by the external components, bonding inductance, and internal

decoupling. The minimum ESR is required to avoid the resonance and make the regulator

stable.

—

Supply ramp rate

—

3—

0.5 ×106

V/s

—

LVD_MAIN: Time

constant of RC filter at

LVD input

3.3V noise rejection at the

input of

LVD comparator

1.1

—

µs

—

HVD_DIG: Time constant

of RC filter at LVD input

1.2V noise rejection at the

input of

LVD comparator

0.1

—

µs

—

LVD_DIG: Time constant

of RC filter at LVD input

1.2V noise rejection at the

input of

LVD comparator

0.1

—

µs

Table 16. Voltage regulator electrical specifications (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

BCRTL

Cext

Cint

V1V2 ring on board

VDD

V1V2 pin

ESR

Cv1v2

MPC5643L

BCP68

MPC5643L Datasheet(PDF) 80 Page - Freescale Semiconductor, Inc

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