TPS70745, TPS70748, TPS70751, TPS70758, TPS70702

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS

SLVS291 – MAY 2000

8

POST OFFICE BOX 655303

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Minimum input voltage for valid RESET

I(RESET) = 300 µA,

V(RESET) ≤ 0.8 V

1.0

1.3

V

Trip threshold voltage

VO decreasing

92%

95%

98%

VO

Hysteresis voltage

Measured at VO

0.5%

VO

RESET

t(RESET)

RESET pulse duration

80

120

160

ms

tr(RESET)

Rising edge deglitch

30

µs

Output low voltage

VI = 3.5 V,

I(RESET) = 1 mA

0.15

0.4

V

Leakage current

V(RESET) = 6 V

1

µA

Minimum input voltage for valid PG1

IO(PG1) = 300 µA,

V(PG1) ≤ 0.8 V

1.0

1.3

V

Trip threshold voltage

VO decreasing

92%

95%

98%

VO

PG1

Hysteresis voltage

Measured at VO

0.5%

VO

PG1

tf(PG1)

Falling edge deglitch

30

µs

Output low voltage

VI = 2.7 V,

I(PG1) = 1 mA

0.15

0.4

V

Leakage current

V(PG1) = 6 V

1

µA

High level EN input voltage

2

V

EN

Low level EN input voltage

0.7

V

Input current (EN)

–1

1

µA

High level SEQ input voltage

2

V

SEQ

Low level SEQ input voltage

0.7

V

SEQ pull up current source

6

µA

High level input voltage

2

V

MR1 / MR2

Low level input voltage

0.7

V

Pull up current source

6

µA

V

VOUT2 UV comparator – positive-going input

threshold voltage of VOUT1 UV comparator

80% VO

83% VO 86% VO

V

V

VOUT2 UV comparator – hysteresis

0.5% VO

mV

VOUT2

VOUT2 UV comparator – falling edge deglitch

VSENSE_2 decreasing below threshold

140

µs

Peak output current

2 ms pulse width

375

mA

Discharge transistor current

VOUT2 = 1.5 V

7.5

mA

V

VOUT1 UV comparator – positive-going input

threshold voltage of VOUT1 UV comparator

80% VO

83% VO 86% VO

V

V

VOUT1 UV comparator – hysteresis

0.5% VO

mV

V

VOUT1 UV comparator – falling edge deglitch

VSENSE_1 decreasing below threshold

140

µs

VOUT1

Dropout voltage (see Note 4)

IO = 250 mA,

VIN1 = 3.2 V,

TJ = 25°C

83

mV

g(

)

IO = 250 mA,

VIN1 = 3.2 V

140

Peak output current

2 ms pulse width

750

mA

Discharge transistor current

VOUT1 = 1.5 V

7.5

mA

VOUT1 UVLO

UVLO threshold

2.4

2.65

V

FB

Input current – TPS70702

FB = 1.8 V

1

µA

NOTE 4: Input voltage(VIN1 or VIN2) = VO(Typ) – 100 mV. For the 1.5 V, 1.8 V and 2.5 V regulators, the dropout voltage is limited by input voltage

range. The 3.3 V regulator input voltage is to 3.2 V to perform this test.