TPS65921BZQZR datasheet(3/58 Pages) TI1

No de pièce	TPS65921BZQZR

Description	Power Management and USB Single Chip

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Fabricant	TI1 [Texas Instruments]

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2

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0

m

L

C

ESR = R

C

TPS65921

www.ti.com

SWCS048F – MARCH 2010 – REVISED MARCH 2012

RECOMMENDED OPERATING CONDITIONS (continued)

over operating free-air temperature range (unless otherwise noted)

32KXIN 32KXOUT

Crystal

40%

60%

duty cycle

Square wave

45%

55%

32-kHz clock rise/fall

Square wave with capacitive load equivalent to

0.1 × tC(32KHZ)

µs

time

30 pF

VIH voltage input high

Square wave in bypass mode(1)

0.65 × VBRTC

V

VIL voltage input low

Square wave in bypass mode(1)

0.35 × VBRTC

V

DCDC Converters and LDOs

VDD1.IN, VDD2.IN, VDD3.IN input voltage range for step-down converter

2.7

3.6

4.5

V

VDD1, VDD2, VIO

Maximum (2.7,

VMMC1.IN input voltage range for LDO VMMC1

output voltage

3.6

4.5

V

selected + 250 mV)

VDAC.IN input voltage range for LDO VDAC

2.7

3.6

4.5

V

Maximum (2.7,

VAUX12S.IN input voltage range for LDO VAUX2

output voltage

3.6

4.5

V

selected + 250 mV)

Maximum (2.7,

VINT.IN input voltage range for LDO VINTANA1, VINTANA2, VINTDIG

output voltage

3.6

4.5

V

and VRTC

selected + 200 mV)

VPLLA3R.IN input voltage range for LDO VPLL1

2.7

3.6

4.5

V

VDD1.OUT ouput voltage range for VDD1 step-down converter

0.6

1.45

V

VDD2.OUT ouput voltage range for VDD2 step-down converter

0.6

1.5

V

VIO.OUT ouput voltage range for VIO step-down converter

1.8/1.85

V

VMMC1.OUT output voltage range for LDO VMMC1

1.85

3.15

V

VDAC.OUT output voltage range for LDO VDAC

1.2

1.8

V

VAUX2.OUT output voltage range for LDO VAUX2

1.3

2.8

V

VPLL1.OUT output voltage range for LDO VPLL1

1.0

1.8

V

VINTANA1.OUT output voltage for LDO VINTANA1

1.5

V

VINTANA2.OUT output voltage for LDO VINTANA2

2.5/2.75

V

VINTUSB1P5V.OUT output voltage for LDO VINTUSB1P5

1.35

1.5

1.65

V

VINTUSB1P8V.OUT output voltage for LDO VINTUSB1P8

1.62

1.8

1.98

V

VUSB3P1V.OUT output voltage for LDO VUSB3P1

3.1

V

VINTDIG.OUT output voltage range for LDO VINTDIG

1.35

1.5

1.65

V

Normal mode

1.45

1.5

1.55

V

VRTC.OUT output

voltage range

Backup mode

1.0

1.3

1.55

V

External Components

Crystal: Nominal load cap on each oscillator input CXIN and CXOUT (2)

9

10

12.5

pF

Crystal ESR (3)

90

k

Ω

Crystal shunt capacitance, CO

1

pF

Value

0.7

1

1.3

µH

DCR

0.1

Ω

External coil for VDD1

Saturation current for TPS65921B

1.8

A

Saturation current for TPS65921B1

2.1

A

(2)

Nominal load capacitor on each oscillator input defined as CXIN = CXOUT = Cosc × 2 – (Cint + Cpin). Cosc is the load capacitor

defined in the crystal oscillator specification, Cint is the internal capacitor, and Cpin is the parallel input capacitor.

(3)

The crystal motional resistance Rm relates to the equivalent series resistance (ESR) by the following formula:

Measured with the load capacitance specified by the crystal manufacturer. In fact, if CXIN = CXOUT = 10 pF, then CL = 5 pF. Parasitic

capacitance from the package and board must also be considered.

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