TPS73701 datasheet(3/18 Pages) TI

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ELECTRICAL CHARACTERISTICS

TPS737xx

SBVS067C – JANUARY 2006 – REVISED AUGUST 2006

Over operating temperature range (T

J = –40°C to +125°C), VIN = VOUT(nom) + 1.0V

(1), I

OUT = 10mA, VEN = 2.2V, and

OUT = 2.2µF, unless otherwise noted. Typical values are at TJ = +25°C.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN

Input voltage range(1)(2)

2.2

5.5

VFB

Internal reference (TPS73701)

TJ = +25°C

1.198

1.20

1.210

Output voltage range

VFB

5.5 – VDO

(TPS73701)

VOUT

Nominal

TJ = +25°C

–1.0

+1.0

Accuracy(1)(3)

over VIN, IOUT,

VOUT + 0.5V ≤ VIN ≤ 5.5V;

–3.0

±0.5

+3.0

and T

10mA

≤ I

OUT ≤ 1A

∆V

OUT%/∆VIN

Line regulation(1)

VOUT(nom) + 0.5V ≤ VIN ≤ 5.5V

0.01

%/V

1mA

≤ I

OUT ≤ 1A

0.002

∆V

OUT%/∆IOUT

Load regulation

%/mA

10mA

≤ I

OUT ≤ 1A

0.0005

Dropout voltage(4)

VDO

IOUT = 1A

130

500

(VIN = VOUT(nom) – 0.1V)

ZO(DO)

Output impedance in dropout

2.2V

≤ V

IN ≤ VOUT + VDO

0.25

Ω

ICL

Output current limit

VOUT = 0.9 × VOUT(nom)

1.05

1.6

2.2

ISC

Short-circuit current

VOUT = 0V

450

IREV

Reverse leakage current(5) (–IIN)

VEN ≤ 0.5V, 0V ≤ VIN ≤ VOUT

0.1

µA

IOUT = 10mA (IQ)

400

IGND

Ground pin current

µA

IOUT = 1A

800

ISHDN

Shutdown current (IGND)

VEN ≤ 0.5V, VOUT ≤ VIN ≤ 5.5

IFB

FB pin current (TPS73701)

0.1

0.6

µA

f = 100Hz, IOUT = 1A,

VIN = VOUT + 1V

Power-supply rejection ratio

PSRR

(ripple rejection)

f = 10kHz, IOUT = 1A,

VIN = VOUT + 1V

Output noise voltage

COUT = 10µF

× V

OUT

µV

RMS

BW = 10Hz – 100KHz

tSTR

Startup time

VOUT = 3V, RL = 30Ω, COUT = 1µF

600

µs

VEN(HI)

Enable high (enabled)

1.7

VIN

VEN(LO)

Enable low (shutdown)

0.5

IEN(HI)

Enable pin current (enabled)

VEN = 5.5V

Shutdown, temperature increasing

+160

TSD

Thermal shutdown temperature

°C

Reset, temperature decreasing

+140

Operating junction temperature

–40

+125

°C

(1)

Minimum VIN = VOUT + VDO or 2.2V, whichever is greater.

(2)

For VOUT(nom) < 1.6V, when VIN ≤ 1.6V, the output will lock to VIN and may result in an over-voltage condition on the output. To avoid this

situation, disable the device before powering down VIN.

(3)

Tolerance of external resistors not included in this specification.

(4)

VDO is not measured for fixed output versions with VOUT(nom) < 2.3V since minimum VIN = 2.2V.

(5)

Refer to the Applications section for more information.

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