TPS2070 datasheet(13/29 Pages) TI

13 / 29 page

TPS2070, TPS2071

FOUR-PORT USB HUB POWER CONTROLLERS

SLVS287A – SEPTEMBER 2000 – REVISED FEBRUARY 2001

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

400

800

1200

1600

2000

2400

2800

3200

3600

4000

VI(BP) = 5 V

TA = 25°C

CL(PG_DLY) = 0.47 µF

t – time – ms

(3.3V_OUT)

(2 V/div)

(PG_DLY)

(2 V/div)

Figure 9. PG_DLY Rise Time With a 0.47-

µF Capacitor

100 200 300 400 500 600 700 800 900 1000

VI(BP) = 5 V

TA = 25°C

CL(PG_DLY) = 0.47 µF

t – time – ms

(3.3V_OUT)

(2 V/div)

VO(PG)

(2 V/div)

Figure 10. Turnon Delay (3.3V_OUT to PG)

VI(BP) = 5 V

TA = 25°C

CL(PG_DLY) = 0.47 µF

t – time – ms

(3.3V_OUT)

(2 V/div)

VO(PG)

(2 V/div)

Figure 11. Turnoff Time (3.3V_OUT to PG)

VI(BP) = 5 V

TA = 25°C

t – time – ms

VI(EN)

(2 V/div)

IO(OUT)

(0.1A/div)

Figure 12. Short-Circuit Current (BP Switch),

Device Enabled Into Short

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