TPS56302 datasheet(6/34 Pages) TI

No. de pieza	TPS56302

Descripción Electrónicos	DUAL-OUTPUT LOW-INPUT-VOLTAGE DSP POWER SUPPLY CONTROLLER WITH SEQUENCING

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Fabricante Electrónico	TI [Texas Instruments]

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TPS56302

DUAL-OUTPUT LOW-INPUT-VOLTAGE

DSP POWER SUPPLY CONTROLLER WITH SEQUENCING

SLVS289 – MARCH 2000

6

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics TJ = 0° to 125°C, VCC = 2.8 V to 5.5 V (unless otherwise noted)

input

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VCC

Supply voltage range

2.8

5.5

V

ICC

Quiescent current

INHIBIT = 0 V,

VCC = 5 V

15

mA

NOTE 2: Ensured by design, not production tested.

reference/voltage identification

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VID0–VID1

High-level input voltage (2)

VBIAS – 0.3 V

V

VID0–VID1

Mid-level floating voltage (1)

V

BIAS

2

* 1

V

BIAS

2

) 1

V

VID0–VID1

Low-level input voltage (0)

0.3

V

Input pull-to-mid resistance

36.5

73

95

k

Ω

cumulative reference

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VREF = 1.3 V,

Hysteresis window = 30 mV,

TJ = 25°C

–1.3%

0.25%

1.3%

Cumulative accuracy ripple regulator

VREF = 1.3 V,

Hysteresis window = 30 mV,

TJ = –40°C,

See Note 2

–0.2%

VREF = full range,

Hysteresis window = 30 mV,

Droop = 0,

See Note 2

–1.5%

1.5%

Cumulative accuracy LDO

VREF = 1.3 V,

IO = 0.1 A,

Closed Loop,

Pass device = IRFZ24N,

TJ = 25°C,

See Note 2

–2%

2%

y

VREF = full range,

IO = 0.1 A,

Closed Loop,

Pass device = IRFZ24N,

See Note 2

–2.5%

2.5%

NOTE 2. Ensured by design, not production tested.

buffered reference

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VREFB output voltage

IREFB=50 µA,

Accuracy from VREF nominal

VREF

–1.5%

VREF

+1.5%

V

VREFB output voltage

IREFB=50 µA,

Accuracy from VREF nominal

TJ = –40°C,

See Note 2

VREF–0.6%

V

VREFB load regulation

10

µA < IREFB < 500 µA

2

mV

NOTE 2. Ensured by design, not production tested.

hysteretic comparator(ripreg)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Input bias current

See Note 2

500

nA

Hysteresis accuracy

VVREFB – VVHYST = 15 mV,

Hysteresis window = 30 mV

–3.5

3.5

mV

Maximum hysteresis setting

VVREFB – VVHYST = 30 mV,

See Note 2

60

mV

Propagation delay time from VSENSE to HIGHDR or

LOWDR (excluding deadtime)

10 mV overdrive,

1.3 V <= VREF <= 3.3 V,

See Note 2

150

250

ns

Prefilter pole frequency

See Note 2

5

MHz

NOTE 2. Ensured by design, not production tested.

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