TPS2070, TPS2071

FOUR-PORT USB HUB POWER CONTROLLERS

SLVS287A – SEPTEMBER 2000 – REVISED FEBRUARY 2001

9

POST OFFICE BOX 655303

electrical characteristics over recommended operating junction temperature range,

4.5 V

internal voltage regulator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VO

Output voltage, dc

VI(BP) = 4.25 V to 5.5 V, IO = 5 mA to 100 mA

3.2

3.3

3.4

V

Dropout voltage

IO = 100 mA

0.6

V

Line regulation

VI(BP) = 4.25 V to 5.25 V, IO = 5 mA

0.1

%/v

Load regulation

VI(BP) = 4.25 V,

IO = 5 mA to 100 mA

0.6%

IOS

Short-circuit current limit†

VI(BP) = 4.25 V, 3.3V_OUT connected to GND

0.12

0.2

0.3

A

Pulldown transistor at 3.3V_OUTPUT

VI(3.3V_OUT) = 3.3 V

10

mA

(see Note 1)

VI(3.3V_OUT) = 1 V

5

mA

PSRR

Power-supply ripple rejection (see Note 1)

F = 1 kHz, CL(3.3V_OUT) = 4.7 µF,

ESR = 0.25

Ω , IO = 5 mA,

VI(BP)PP = 100 mV

40

dB

Low-level trip threshold voltage at PG

2.88

2.94

3

V

Vhys

Hysteresis voltage at PG (see Note 1)

50

100

mV

VOH

High-level output voltage at PG

4.25 V

≤ VI(BP) ≤ 5.25 V, IO = 2 mA

2.4

V

VOL

Low-level output voltage at PG

4.25 V

≤ VI(BP) ≤ 5.25 V, IO = 3.2 mA

0.4

V

Vref

Reference voltage at PG_DLY

1.22

V

Charge current at PG_DLY

3

uA

td

Delay time at PG (see Notes 1 and 2)

CL(PG_DLY) = 0.47 µF

190

ms

† Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.

NOTES:

1. Specified by design, not tested in production.

2. The PG delay time (td) is calculated using the PG_DLY reference voltage and charge current:

t

d +

C

L(PG_DLY)

V

ref

Charge Current