HT7727A(2007) 查看數據表（PDF） - Holtek Semiconductor

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HT7727A
(Rev.:2007)

PFM Step-up DC/DC Converter

Holtek Semiconductor 

HT77XXA

5 .5

5 .2

4 .9

4 .6

V IN = 1 .5 V

V IN = 2 .0 V

V IN = 3 .0 V

4 .3

4 .0

V IN = 1 .2 V

3 .7

3 .4

3 .1

2 .8

2 .5

0 20 40 60 80 100 120 140 160 180 200

O u tp u t C u rre n t (m A )

HT7750A Output Voltage v.s Output Current

(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)

90%

85%

80%

75%

70%

65%

60%

55%

0

V IN = 3 .0 V

V IN = 1 .2 V

V IN = 1 .5 V

V IN = 2 .0 V

20 40

60 80 100 120 140 160 180 200 220

O u tp u t C u rre n t (m A )

HT7750A Efficiency v.s Output Current

(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)

360

310

V IN = 2 .0 V

260

V IN = 3 .0 V

210

V IN = 1 .5 V

160

110

V IN = 1 .2 V

60

10

0 20 40 60 80 100 120 140 160 180 200 220

O u tp u t C u rre n t (m A )

HT7750A Ripple Voltage v.s Output Current

(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)

360

310

260

210

V IN = 2 .0 V

160

V IN = 1 .5 V

110

V IN = 1 .2 V

V IN = 3 .0 V

60

10

0 10 20 30 40 50 60 70 80 90 100 110

O u tp u t C u rre n t (m A )

HT7750A Ripple Voltage v.s Output Current

(CIN=47mF-Tantalum, L=100mH, COUT=22mF-Tantalum)

1 .2

S ta rt-u p

1 .1

H o ld - o n

1

0 .9

0 .8

0 .7

0 .6

0 .5

0 .4

0 .3

0 .2

0 .1

0 2 4 6 8 10 12 14 16 18 20 22

O u tp u t C u rre n t (m A )

HT7750A Start-up/Hold-on Voltage

(CIN=47mF-Tantalum, L=47mH, COUT=22mF-Tantalum)

Rev 1.10

7

September 26, 2007

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