TPS70745, TPS70748, TPS70751, TPS70758, TPS70702

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS

SLVS291 – MAY 2000

7

POST OFFICE BOX 655303

recommended operating conditions

MIN

MAX

UNIT

Input voltage, VI†

2.7

6

V

Output current, IO (regulator 1)

0

250

mA

Output current, IO (regulator 2)

0

125

mA

Output voltage range (for adjustable option)

1.22

5.5

V

Operating virtual junction temperature, TJ

–40

125

°C

† To calculate the minimum input voltage for maximum output current, use the following equation: VI(min) = VO(max) + VDO(max load).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Reference

voltage

2.7 V < VI < 6 V,

FB connected to VO

TJ = 25°C

1.22

voltage

2.7 V < VI < 6 V,

FB connected to VO

1.196

1.244

1 2 V Output

2.7 V < VI < 6 V,

TJ = 25°C

1.2

1.2 V Output

2.7 V < VI < 6 V

1.176

1.224

O

1 5 V Output

2.7 V < VI < 6 V,

TJ = 25°C

1.5

V

VO

Output voltage

(see Notes 1 and 3)

1.5 V Output

2.7 V < VI < 6 V

1.47

1.53

O

(see Notes 1 and 3)

1 8 V Output

2.8 V < VI < 6 V,

TJ = 25°C

1.8

1.8 V Output

2.8 V < VI < 6 V

1.764

1.836

2 5 V Output

3.5 V < VI < 6 V,

TJ = 25°C

2.5

2.5 V Output

3.5 V < VI < 6 V

2.45

2.55

3 3 V Output

4.3 V < VI < 6 V,

TJ = 25°C

3.3

V

3.3 V Output

4.3 V < VI < 6 V

3.234

3.366

V

Quiescent current (GND current) for regulator 1 and

See Note 3,

TJ = 25°C

190

µA

()

g

regulator 2, EN = 0 V, (see Note 1)

See Note 3

230

µA

Output voltage line regulation (

∆VO/VO) for

VO + 1 V < VI ≤ 6 V,

TJ = 25°C,

See Note 1

0.01%

V

gg

(

OO)

regulator 1 and regulator 2 (see Note 2)

VO + 1 V < VI ≤ 6 V,

See Note 1

0.1%

V

Load regulation for VOUT1 and VOUT2

TJ = 25°C,

See Note 3

1

mV

V

Output noise voltage

Regulator 1

BW = 300 Hz to 50 kHz

CO =33 µFTJ =25°C

65

µVrms

Vn

Output noise voltage

Regulator 2

BW = 300 Hz to 50 kHz, CO = 33 µF,

TJ = 25°C

65

µVrms

Output current limit

Regulator 1

VO =0V

1.6

1.9

A

Output current limit

Regulator 2

VO = 0 V

0.750

1

A

Thermal shutdown junction temperature

150

°C

II( t db )

Standby current

Regulator 1 and

EN = VI,TJ = 25°C

2

µA

II(standby)

Standby current

g

Regulator 2

EN = VI

6

µA

PSRR

Power supply ripple rejection

f = 1 kHz, CO = 33 µF,

TJ = 25°C,

See Note 1

60

dB

NOTES:

1. Minimum input operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum input voltage = 6 V, minimum output current

1 mA.

2. If VO < 1.8 V then Vimax = 6 V, VImin = 2.7 V:

Line Regulation (mV)

+ % V

V

O

V

imax *

2.7 V

100

1000

If VO > 2.5 V then Vimax = 6 V, VImin = Vo + 1 V:

Line Regulation (mV)

+ % V

V

O

V

imax *

V

O )

1

100

1000

3. IO = 1 mA to 250 mA for Regulator 1 and 1 mA to 125 mA for Regulator 2.