TPS2148IDGNG4 datasheet(9/22 Pages) TI1

Part #	TPS2148IDGNG4

Description	3.3-V LDO AND DUAL SWITCH FOR USB PERIPHERAL POWER MANAGEMENT

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TPS2148

TPS2158

SLVS373 − AUGUST 2001

9

www.ti.com

TYPICAL CHARACTERISTICS

Figure 2

VO(OUT)

(2 V/div)

VI = 5 V

TA = 25°C

CL = 1 µF

RL = 25 Ω

SWITCH TURNON DELAY AND RISE TIME

WITH 1-

µF LOAD

0

0.4

0.8

1.2

1.6

2

2.4

2.8

3.2

3.6

4.2

t − Time − ms

VI(EN)

(5 V/div)

Figure 3

SWITCH TURNOFF DELAY AND FALL TIME

WITH 1-

µF LOAD

0

0.4

0.8

1.2

1.6

2

2.4

2.8

3.2

3.6

4.2

t − Time − ms

VO(OUT)

(2 V/div)

VI = 5 V

TA = 25°C

CL = 1 µF

RL = 25 Ω

VI(EN)

(5 V/div)

Figure 4

SWITCH TURNON DELAY AND RISE TIME

WITH 120-

µF LOAD

t − Time − ms

02

4

6

8

10

12

14

16

18

20

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

04

8

12

16 20

24

28

32

36

40

VO(OUT)

(2 V/div)

VI = 5 V

TA = 25°C

CL = 120 µF

RL = 25 Ω

VI(EN)

(5 V/div)

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