LT1619 Linear Technology, LT1619 Datasheet - Page 14

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

APPLICATIO S I FOR ATIO
LT1619
14
C
C
D1: MOTOROLA MBRB1545CT
L1: SUMIDA CEPH149-1R0
R
IN1
OUT1
SENSE
C
150pF
: SANYO POSCAP 6TPB150M 2
P
: SANYO POSCAP 10TPB220M 4
U
: PANASONIC 0.002 1W
R
75k
C
C
15nF
Z
U
1
2
3
4
S/S
FB
V
GND
C
LT1619
W
SENSE
Figure 15b. Efficiency of the 5V/8A Boost Converter
GATE
DRV
V
IN
Figure 15a. 3.3V to 5V/8A Boost Converter
89
88
87
86
85
84
83
8
7
6
5
0.01
V
IN
U
= 3.3V
C
1 F
CERAMIC
IN2
C
0.1 F
CERAMIC
DRV
LOAD CURRENT (A)
0.1
+
C
300 F
IN1
1
1619 F15b
M1
FDS6680A
R
L1
1 H
2
SENSE
10
V
3.3V
IN
220 F
C
OUT1
D1
4
+
C
10 F
CERAMIC
OUT2
1619 F15a
R1
37400
R2
12400
5V
8A
1619fa