TPS79501-Q1 datasheet(3/18 Pages) TI1

No de pièce	TPS79501-Q1

Description	ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 500-mA LOW-DROPOUT LINEAR REGULATORS

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TPS79501-Q1

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SLVSAJ9 – SEPTEMBER 2010

ELECTRICAL CHARACTERISTICS

Over recommended operating temperature range (TJ = –40°C to 125°C), VEN = VIN, VIN = VOUT(nom) + 1 V

(1), I

OUT = 1 mA,

COUT = 10 mF, CNR = 0.01 mF, unless otherwise noted. Typical values are at +25°C.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input voltage, VIN

(1)

2.7

5.5

V

Internal reference, VFB

1.200

1.225

1.250

V

Continuous output current, IOUT

0

500

mA

Output voltage range

1.225

5.5 – VDO

V

Output

voltage

Accuracy, see Note (2)

0 mA ≤ IOUT ≤ 500 mA, VOUT + 1 V ≤ VIN ≤ 5.5 V

(1)

0.98(VOUT)

VOUT

1.02(VOUT)

V

Output voltage line regulation (

ΔVOUT%/ΔVIN)

(1)

VOUT + 1 V ≤ VIN ≤ 5.5 V

0.05

0.12

%/V

Load regulation (

ΔVOUT%/ΔIOUT)

0 mA ≤ IOUT ≤ 500 mA,

3

mV

Dropout voltage(3)

IOUT = 500 mA

110

170

mV

VIN = VOUT(nom) - 0.1 V

Output current limit

VOUT = 0 V

2.4

2.8

4.2

A

Ground pin current

0 mA ≤ IOUT ≤ 500 mA

265

385

mA

Shutdown current(4)

VEN = 0 V, 2.7 V ≤ VIN ≤ 5.5 V

0.07

1

mA

FB pin current

VFB = 1.225 V

1

mA

f = 100 Hz, IOUT = 10 mA

59

f = 100 Hz, IOUT = 500 mA

58

Power-supply ripple rejection

dB

f = 10 kHz, IOUT = 500 mA

50

f = 100 kHz, IOUT = 500 mA

39

CNR = 0.001 mF

46

CNR = 0.0047 µF

41

BW = 100 Hz to 100 kHz,

Output noise voltage

mVRMS

IOUT = 500 mA

CNR = 0.01 mF

35

CNR = 0.1 mF

33

CNR = 0.001 mF

50

Time, start-up

RL = 6 Ω, COUT = 1 µF

CNR = 0.0047 mF

75

ms

CNR = 0.01 mF

110

High-level enable input voltage

2.7 V

≤ VIN ≤ 5.5 V

1.7

VIN

V

Low-level enable input voltage

2.7 V

≤ VIN ≤ 5.5 V

0.7

V

EN pin current

VEN = 0 V

1

mA

UVLO threshold

VCC rising

2.25

2.65

V

UVLO hysteresis

100

mV

(1)

Minimum VIN is 2.7 V or VOUT + VDO, whichever is greater.

(2)

Tolerance of external resistors not included in this specification.

(3)

Dropout is not measured since minimum VIN = 2.7 V.

(4)

For adjustable version, this applies only after VIN is applied; then VEN transitions high to low.

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