PC34709VKR2 datasheet(71/142 Pages) FREESCALE

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Analog Integrated Circuit Device Data



Freescale Semiconductor

34709

Functional Block Description

7.5.6.10 VGEN1, VGEN2

General purpose LDOs, VGEN1, and VGEN2, are provided for expansion of the power tree to support peripheral devices, which

could include EMMC cards, WLAN, BT, GPS, or other functional modules. These regulators include programmable set points for

IDACLIM

Current Limit

• External PNP mode only

•VINMIN < VIN < VINMAX

• Current on VDACDRV multiplied by

 of external PNP transistor

(IDACDRV when VDACDRV is forced to LDOVDD)

3.2*



VDAC LOW-POWER MODE – DC - VDACMODE=1

VDAC

Output Voltage VOUT

•VINMIN < VIN < VINMAX ILMINLP < IL < ILMAXLP

VNOM – 3%

VNOM

VNOM + 3%

IDAC

Current Load Range ILMINLP to ILMAXLP

0.0

3.0

IDACQ

Low-power Mode Quiescent Current

•VINMIN < VIN < VINMAX IL = 0

8.0

µA

VDAC ACTIVE MODE – AC

VDACPSRR

PSRR - IL = 75% of ILMAX 20 Hz to 20 kHz

•VIN = VINMIN + 100 mV

•VIN = VNOM + 1.0 V

VDACNOISE

Output Noise Density, VIN = VINMIN IL = 75% of ILMAX

• 100 Hz – 1.0 kHz

•> 1.0 kHz – 10 kHz

•> 10 kHz – 1.0 MHz

-115

-126

-132

V/Hz

VDACSPURS

Spurs

• 32.768 kHz and harmonics

-120

tON-VDAC

Turn-on Time

• Enable to 90% of end value VIN = VINMIN, VINMAX IL = 0

1.0

tOFF-VDAC

Turn-off Time

• Disable to 10% of initial value VIN = VINMIN, VINMAX, IL = 0

0.05

VDACOS-

START

Start-up Overshoot

•VIN = VINMIN, VINMAX IL = 0

1.0

2.0

VDACLO

TRANSIENT

Transient Load Response

•VIN = VINMIN, VINMAX

1.0

2.0

VDACLI

TRANSIENT

Transient Line Response

•IL = 75% of ILMAX

5.0

8.0

tMODE-VDAC

Mode Transition Time

• From low-power to active VIN = VINMIN, VINMAX IL = ILMAXLP

100

µs

VDACMODE

RES

Mode Transition Response

• From low-power to active and from active to low-power

VIN = VINMIN, VINMAX IL = ILMAXLP

1.0

2.0

Table 60. VDAC Electrical Specification

Characteristics noted under conditions BP = 3.6 V, -40

C  TA  85 C, unless otherwise noted. Typical values at BP = 3.6 V

and TA = 25 °C under nominal conditions, unless otherwise noted.

Symbol

Characteristic

Min

Typ

Max

Unit

Notes

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