SS6642-27G 데이터 시트보기 (PDF) - Silicon Standard Corp.
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SS6642-27G Datasheet PDF : 22 Pages
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ELECTRICAL CHARACTERISTICS (Continued)
SS6642G
PARAMETER
SW Switch-On Resis-
tance
Oscillator Duty Cycle
Max. Oscillator Freq.
Efficiency
TEST CONDITIONS
SS6642-27G
SS6642-30G
SS6642-33G
SS6642-37G
SS6642-45G
SS6642-50G
VS=VOUT x 0.95,
VSW=0.4V
VS=VOUT x 0.95
Measurement of the SW
pin waveform
VS=VOUT x 0.95
Measurement of the SW
pin waveform
TEST
CKT
SYMBOL
MIN.
2
RON
TYP.
2.2
2.1
2.0
2.0
1.9
1.9
MAX.
UNIT
Ω
3 DUTY 65
75
85
%
3
FOSC
80
105 130 KHz
1
η
85
%
Note 1: Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
TYPICAL PERFORMANCE CHARACTERISTICS
Test circuit refer to typical application circuit
Capacitor (C2) : 47 µ F (Tantalum Type)
Diode (D1) : 1N5819 Schottky Type
2.8
85
2.7
80
2.6
VIN=1.5V VIN=1.8V VIN=2.0V
VIN=1.2V
2.5
2.4
VIN=0.9V
2.3
2.2 0
20
40
60
80 100 120 140 160 180
Output Current (mA)
Fig. 4 SS6642-27 Load Regulation (L=100µH CD54)
75
70
VIN=1.8V VIN=2.0V
65
VIN=1.5V
60
VIN=0.9V
55
0
20
40
VIN=1.2V
60
80 100 120 140 160 180
Output current (mA)
Fig. 5 SS6642-27 Efficiency (L=100µH CD54)
1/15/2005 Rev.2.10
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