LT1619 Linear Technology, LT1619 Datasheet - Page 16

• Manufacturer Part Number: LT1619
• Description: Low Voltage Current Mode PWM Controller
• Manufacturer: Linear Technology

LT1619
TYPICAL APPLICATIO S
16
4.75V TO
5.25V
V
IN
T1: COILTRONICS CTX02-14261, EFD20-3F3, 6 WINDINGS EACH, 12 H
+
2.2nF
1500 F
6.3V
SANYO MV-GX
1.1k
36k
22nF
1N749
4.3V
1
2
3
4
U
S/S
FB
V
GND
C
LT1619
SENSE
Figure 17b. Efficiency of the 5V to – 48V Cuk
GATE
DRV
90
89
88
87
86
81
80
79
85
84
83
82
V
Figure 17a. 5V to – 48V Cuk Converter
IN
10
8
7
6
5
10 F
LOAD CURRENT (mA)
15
1 F
100
V
V
IN
IN
= 5V
= 4.75V
0.007
•
•
•
•
SUD45N05-20L
50V, 0.018
43nC
V
IN
T1
= 5.25V
4.7 F
FILM
•
•
1619 F17b
1000
MBRS340T3
MBRS340T3
4.7 F
FILM
30
220pF
+
+
470 F
35V
SANYO MV-GX
470 F
35V
SANYO MV-GX
–48V/0.5A
1619 F17a
1M
2N5210
2N5210
12k
10.5k
1%
432k
1%
1619fa