TPS2070, TPS2071

FOUR-PORT USB HUB POWER CONTROLLERS

SLVS287A – SEPTEMBER 2000 – REVISED FEBRUARY 2001

3

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

NC

1

No internal connection

EN1

2

I

Active-low enable for OUT1

AGND

3

Analog ground

NC

4

No internal connection

PG

5

O

Logic output, power good

SP

6

I

Self-power voltage input, connects to local power supply

SP

7

I

Self-power voltage input, connects to local power supply

NC

8

No internal connection

VEXT

9

I

Input voltage for the external voltage regulator

GATE

10

O

Output gate drive for an external N-channel MOSFET

3.3V_OUT

11

O

3.3-V internal voltage regulator output

BPMODE†

12

O

A logic signal that indicates if the outputs source from the bus-powered supply. BPMODE (TPS2070) or

BPMODE (TPS2071) can be used to signal hub controller.

DP0_RST

13

O

Connects to DP signal from upstream hub/host through an external 1.5-k

Ω resistor

EN_REG

14

I

Active-high enable, enables external voltage regulator. Connect to BP or GND

EN2

15

I

Active-low enable for OUT2

DGND

16

Digital ground

VCP

17

Charge-pump output, source for an external voltage-regulator driver. Recommend 0.1-

µF capacitor to

DGND.

CP_P

18

Charge-pump-capacitor connection from CP_M. Recommend 0.01-

µF between CP_P and CP_M.

CP_M

19

Charge-pump-capacitor connection from CP_P. Recommend 0.01-

µ between CP_P and CP_M.

EN3

20

I

Active-low enable for OUT3

EN4

21

I

Active-low enable for OUT4

OC1

22

O

Logic output, overcurrent response for OUT1

OC2

23

O

Logic output, overcurrent response for OUT2

OC3

24

O

Logic output, overcurrent response for OUT3

OC4

25

O

Logic output, overcurrent response for OUT4

OUT4

26

O

Power switch output for downstream ports

OUT3

27

O

Power switch output for downstream ports

OUT2

28

O

Power switch output for downstream ports

OUT1

29

O

Power switch output for downstream ports

BP

30

I

Bus power voltage input, connect to VBUS

BP_DIS

31

I

Active-high logic input, disables autoswitch to bus power when self power is disconnected. Connect to BP

or GND

PG_DLY‡

32

Adjusts the PG time delay with a capacitor to ground. Adjust the pulsewidth to fit the application.

† Pin 12 is active low for TPS2070 and active high for TPS2071.

‡ Use the following formula to calculate the capacitance needed; C = (desired pulsewidth

× 3 × 10–6)/1.22