MMPF0200Z datasheet(25/118 Pages) NXP

25 / 118 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

PF0200Z

Functional Block Requirements and Behaviors

Bias and References Block Description

6.3

Bias and References Block Description

6.3.1

Internal Core Voltage References

All regulators use the main bandgap as the reference. The main bandgap is bypassed with a capacitor at VCOREREF. The

bandgap and the rest of the core circuitry are supplied from VCORE. The performance of the regulators is directly dependent on

the performance of the bandgap. No external DC loading is allowed on VCORE, VCOREDIG, or VCOREREF. VCOREDIG is

kept powered as long as there is a valid supply and/or valid coin cell. Table 16 shows the main characteristics of the core circuitry.

6.3.1.1

External Components

Table 16. Core Voltages Electrical Specifications(26)

TA = -40 to 85 °C,VIN = 2.8 to 4.5 V, LICELL = 1.8 to 3.3 V, and typical external component values. Typical values are

characterized at VIN = 3.6 V, LICELL = 3.0 V, and 25 °C, unless otherwise noted.

Parameters

Symbol

Min

Typ

Max

Units

VCOREDIG (DIGITAL CORE SUPPLY)

Output Voltage

ON mode (25)

Coin cell mode and OFF

VCOREDIG

–

1.5

1.3

–

VCORE (ANALOG CORE SUPPLY)

Output Voltage

ON mode and charging(25)

OFF and Coin cell mode

VCORE

–

2.775

0.0

–

VCOREREF (BANDGAP / REGULATOR REFERENCE)

Output Voltage(25)

VCOREREF

–1.2

–

Absolute Accuracy

VCOREREFACC

–0.5

–

Temperature Drift

VCOREREFTACC

–0.25

–

Notes

25.

3.0 V < VIN < 4.5 V, no external loading on VCOREDIG, VCORE, or VCOREREF. Extended operation down to UVDET, but no system

malfunction.

26.

For information only.

Table 17. External Components for Core Voltages

Regulator

Capacitor Value (

F)

VCOREDIG

1.0

VCORE

1.0

VCOREREF

0.22

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