TPS79518DCQR datasheet(3/23 Pages) TI

Part #	TPS79518DCQR

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

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ELECTRICAL CHARACTERISTICS

TPS795xx

SLVS350G – OCTOBER 2002 – REVISED JULY 2006

Over recommended operating temperature range (T

J = –40°C to +125°C), VEN = VIN, VIN = VOUT(nom) + 1 V

(1), I

OUT = 1 mA,

C

OUT = 10 µF, CNR = 0.01 µF, 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 (TPS79501)

1.200

1.225

1.250

V

Continuous output current, IOUT

0

500

mA

Output voltage range

TPS79501

1.225

5.5 – VDO

V

Output

TPS79501(2) 0

µA ≤ I

OUT ≤ 500 mA, VOUT + 1 V ≤ VIN ≤ 5.5 V

(1)

0.98(VOUT)

VOUT

1.02(VOUT)

V

voltage

Accuracy

Fixed VOUT

0

µA ≤ I

OUT ≤ 500 mA, VOUT + 1 V ≤ VIN ≤ 5.5 V

(1)

–2.0

+2.0

%

Output voltage line regulation (

∆V

OUT%/∆VIN)

(1)

VOUT + 1 V ≤ VIN ≤ 5.5 V

0.05

0.12

%/V

Load regulation (

∆V

OUT%/∆IOUT)

0

µA ≤ I

OUT ≤ 500 mA,

3

mV

TPS79530

IOUT = 500 mA

110

170

Dropout voltage(3)

mV

VIN = VOUT(nom) - 0.1 V

TPS79533

IOUT = 500 mA

105

160

Output current limit

VOUT = 0 V

2.4

2.8

4.2

A

Ground pin current

0

µA ≤ I

OUT ≤ 500 mA

265

385

µA

Shutdown current(4)

VEN = 0 V, 2.7 V ≤ VIN ≤ 5.5 V

0.07

1

µA

FB pin current

VFB = 1.225 V

1

µA

f = 100 Hz, IOUT = 10 mA

59

f = 100 Hz, IOUT = 500 mA

58

Power-supply ripple rejection

TPS79530

dB

f = 10 kHz, IOUT = 500 mA

50

f = 100 kHz, IOUT = 500 mA

39

CNR = 0.001 µF

46

CNR = 0.0047 µF

41

BW = 100 Hz to 100 kHz,

Output noise voltage (TPS79530)

µV

RMS

IOUT = 500 mA

CNR = 0.01 µF

35

CNR = 0.1 µF

33

CNR = 0.001 µF

50

Time, start-up (TPS79530)

RL = 6 Ω, COUT = 1 µF

CNR = 0.0047 µF

75

µs

CNR = 0.01 µF

110

High-level enable input voltage

2.7 V

≤ V

IN ≤ 5.5 V

1.7

VIN

V

Low-level enable input voltage

2.7 V

≤ V

IN ≤ 5.5 V

0.7

V

EN pin current

VEN = 0 V

1

µA

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 for the TPS79501 and TPS79525 since minimum VIN = 2.7 V.

(4)

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

3

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