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SS6639 датащи(PDF) 4 Page - Silicon Standard Corp.

номер детали SS6639
подробное описание детали  1-Cell, 3-Pin, Step-Up DC/DC Controller
PDF  12 Pages
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производитель  SSC [Silicon Standard Corp.]
домашняя страница  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS6639 датащи(HTML) 4 Page - Silicon Standard Corp.

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SS6639
n ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER
TEST CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Oscillator Duty Cycle
VIN=VOUT x 0.95
Measurement of the EXT Pin
Waveform
DUTY
65
75
85
%
Max. Oscillator Freq.
VIN=VOUT x 0.95
Measurement of the EXT Pin
Waveform
FOSC
80
105
130
KHz
Efficiency
η
80
%
n TYPICAL PERFORMANCE CHARACTERISTICS
Inductor (L1): 33
µH (Pin Type)
Capacitor (C1): 47
µF (Tantalum Type)
Diode
(D1): 1N5819 Schottky Type
Transistor (Q1): 2SD1803
0
50
100
150
200
250
300
350
400
450
500
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
Fig. 1 SS6639-27 Load Regulation (L=33
µH)
V IN = 2.0
V
V IN= 1.8V
V IN = 1.5
V
V IN = 1.2
V
V IN=0.9V
Output Current (mA)
0
50
100
150
200
250
300
350
400
450
500
50
55
60
65
70
75
80
85
90
Fig. 2 SS6639-27 Efficiency (L=33uH)
Output Current (mA)
V IN = 2.0V
V IN =1.8V
V IN= 1.5V
V IN= 1.2V
V IN = 0.9V
0
50
100
150
200
250
300
350
400
450
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
Fig. 3 SS6639-30 Load Regulation (L=33
µH)
Output Current (mA)
VIN=2.0V
VIN=1.8V
VIN=1.5V
VIN=1.2V
VIN=0.9V
Output Current (mA)
0
50
100
150
200
250
300
350
400
450
60
65
70
75
80
85
90
Fig. 4 SS6639-30 Efficiency (L=33
µH)
VIN=2.0V
VIN=1.8V
VIN=1.5V
VIN=1.2V
VIN=0.9V
Rev.2.01 6/26/2003



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