TPS70751MPWPREP datasheet(9/41 Pages) TI1

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TPS70751-EP

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATOR

WITH POWER-UP SEQUENCING FOR SPLIT-VOLTAGE DSP SYSTEMS

SLVS718 – DECEMBER 2006

Electrical Characteristics (continued)

over recommended operating junction temperature (T

J = –55°C to 125°C), VIN1 or VIN2 = VO(nom) + 1 V, IO = 1 mA, EN = 0,

O = 33 µF (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RESET

Minimum input voltage for valid RESET

I(RESET) = 300 µA, V(RESET) ≤ 0.8 V

1.3

Trip threshold voltage

VO decreasing

92%

95%

98%

Hysteresis voltage

Measured at VO

0.5%

t(RESET)

RESET pulse duration

120

160

tr(RESET)

Rising-edge deglitch

µs

Output low voltage

VI = 3.5 V, I(RESET) = 1 mA

0.15

0.4

Leakage current

V(RESET) = 6 V

µA

PG1

Minimum input voltage for valid PG1

IO(PG1) = 300 µA, V(PG1) ≤ 0.8 V

1.3

Trip threshold voltage

VO decreasing

92%

95%

98%

Hysteresis voltage

Measured at VO

0.5%

tf(PG1)

Falling-edge deglitch

µs

Output low voltage

VI = 2.7 V, I(PG1) = 1 mA

0.15

0.4

Leakage current

V(PG1) = 6 V

µA

High-level EN input voltage

Low-level EN input voltage

0.7

Input current (EN)

–1

µA

SEQ

High-level SEQ input voltage

Low-level SEQ input voltage

0.7

SEQ pullup current source

µA

MR1/MR2

High-level MR1/MR2 input voltage

Low-level MR1/MR2 input voltage

0.7

MR1/MR2 pullup current source

µA

VOUT2

VOUT2 UV comparator – positive-going input

83%

80% VO

86% VO

threshold voltage of VOUT1 UV comparator

VOUT2 UV comparator – falling-edge deglitch

VSENSE2 decreasing below threshold

140

µs

Peak output current

2-ms pulse width

375

Discharge transistor current

VOUT2 = 1.5 V

7.5

VOUT1

VOUT1 UV comparator – positive-going input

83%

80% VO

86% VO

threshold voltage of VOUT1 UV comparator

0.5%

VOUT1 UV comparator – hysteresis

VOUT1 UV comparator – falling-edge deglitch

VSENSE1 decreasing below threshold

140

µs

IO = 250 mA, VIN1 = 3.2 V, TJ = 25°C

Dropout voltage(4)

IO = 250 mA, VIN1 = 3.2 V

140

Peak output current

2-ms pulse width

750

Discharge transistor current

VOUT1 = 1.5 V

7.5

UVLO threshold

2.4

2.65

(4)

Input voltage (VIN1 or VIN2) = VO(typ) – 100 mV. For 1.8-V regulators, the dropout voltage is limited by the input voltage range. The 3.3-V

regulator input voltage is to 3.2 V to perform this test.

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