HT7737 查看數據表（PDF） - Holtek Semiconductor
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HT7737 Datasheet PDF : 19 Pages
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Test Circuit
100mH
1N 5817
V IN
V OUT
HT77XX
47mF
LX
( T a n ta lu m )
VO UT
H T77X X
S e r ie s
GND
(F ig . 1 )
100mF
VS
( T a n ta lu m )
VO UT
LX
VS
H T77X X
S e r ie s
GND
VO UT
LX
H T77X X
S e r ie s
100W
GND
VX
(F ig . 2 )
(F ig . 3 )
Typical Performance Characteristics
1 .9 0
1 .8 5
1 .8 0
V IN = 1 .6 V
1 .7 5
V IN = 1 .0 8 V
V IN = 1 .4 V
V IN = 1 .2 V
1 .7 0
1 .6 5
1 .6 0
0
20
40
60
80
100
120
140
O u tp u t C u rre n t (m A )
HT7718 Output Voltage v.s Output Current
1 .1
1 .0
S ta rt-u p
0 .9
0 .8
0 .7
0 .6
0 .5
0 .4
0 .3
H o ld - o n
0 .2
0 .1
0 .0
0
2
4
6
8
10 12 14 16 18 20
O u tp u t C u rre n t (m A )
HT7718 Start-Up& Hold-On Voltage
90%
85%
80%
75%
70%
65%
60%
55%
0
V IN = 1 .6 V
V IN = 1 .0 8 V
V IN = 1 .4 V
V IN = 1 .2 V
20
40
60
80
100
120
140
O u tp u t C u rre n t (m A )
HT7718 Efficiency v.s Output Current
Rev 1.90
4
October 13, 2010
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