P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
SG1842/SG1843 Series
C
U R R E N T - M O D E P W M C O N T R O L L E R
P R O D U C T I O N D A T A S H E E T
CHARACTERISTIC CURVES
FIGURE 1. — DROPOUT VOLTAGE vs. TEMPERATURE
FIGURE 2. — OSCILLATOR TEMPERATURE STABILITY
2
0
V = 15V
IN
10.0
Duty Cycle = 50%
SG1842
-2
-4
-6
9.6
9.2
8.8
-8
8.4
8.0
-10
SG1843
-75
-50
-25
0
25
50
75
100
125
-75
-50
-25
0
25
50
75
100
125
Junction Temperature - (°C)
Junction Temperature - (°C)
FIGURE 3. — CURRENT SENSE TO OUTPUT DELAY vs.
FIGURE 4. — OUTPUT DUTY CYCLE vs. TEMPERATURE
TEMPERATURE
200kHz
50
220
49
200
180
100kHz
50kHz
50kHz
48
47
46
45
44
VPIN3 = 1.1V
160
100kHz
200kHz
140
120
-75
-50
-25
0
25
50
75
100
125
-75
-50
-25
0
25
50
75
100
125
Junction Temperature - (°C)
Junction Temperature - (°C)
Copyright © 2000
Rev. 1.6 4/00
7
MICROSEMI [ Microsemi ]
