TPS2149 datasheet(9/19 Pages) TI

Part #	TPS2149

Description	3.3-V LDO AND DUAL SWITCH FOR USB BUS-POWERED HUB POWER MANAGEMENT

PDF	19 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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9 / 19 page

TPS2149

TPS2159

SLVS401 – AUGUST 2001

www.ti.com

TYPICAL CHARACTERISTICS

Figure 4

SWITCH TURNON DELAY AND RISE TIME

WITH 120-

µF LOAD

t – Time – ms

VO(OUT)

(2 V/div)

VI = 5 V

TA = 25°C

CL = 120 µF

RL = 25 Ω

VI(EN)

(5 V/div)

Figure 5

SWITCH TURNOFF DELAY AND FALL TIME

WITH 120-

µF LOAD

t – Time – ms

16 20

VO(OUT)

(2 V/div)

VI = 5 V

TA = 25°C

CL = 120 µF

RL = 25 Ω

VI(EN)

(5 V/div)

Figure 6

SHORT-CIRCUIT CURRENT, SWITCH

ENABLED INTO A SHORT

t – Time – ms

IO(OUT)

(100 mA/div)

VI(EN)

(5 V/div)

Figure 7

VI(LDO_EN)

(5 V/div)

VO(LDO_OUT)

(1 V/div

LDO TURNON DELAY AND RISE TIME

WITH 4.7-

µF LOAD

0.4

0.8

1.2

1.6

2.4

2.8

3.2

3.6 4.2

t – Time – ms

VI = 5 V

TA = 25°C

CL = 4.7 µF

RL = 13.2 Ω

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