LT1765-3.3 LINER [Linear Technology], LT1765-3.3 Datasheet - Page 17

• Manufacturer Part Number: LT1765-3.3
• Description: Monolithic 3A, 1.25MHz Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
U
–9V AT 1A
U
OUTPUT
INPUT
5V
Figure 12. Positive-to-Negative Low Output Ripple Converter
W
L1: CDRH5D28-2R5
BOLD LINES INDICATE HIGH CURRENT PATHS
L1: CDRH6D28-3R0
C3
22 F
16V X5R
CERAMIC
C3
2.2 F
16V X5R
CERAMIC
V
SYNC
SHDN
V
SYNC
SHDN
IN
IN
Figure 13. Negative Boost Converter
GND
GND
U
LT1765FE
LT1765-5
4700pF
1800pF
BOOST
BOOST
U1
U1
C
6.8k
C
2.4k
C
R
C
R
C
C
V
V
C
C
V
V
100pF
100pF
0.22 F
SW
0.22 F
SW
FB
FB
C
C
C2
C2
F
F
LT1765/LT1765-1.8/LT1765-2.5/
D1
UPS120
D1
B220A
CMDSH-3
D2
3 H
L1
10k
R2
CMDSH-3
2.5 H
D2
L1
64.9k
R1
LT1765-3.3/LT1765-5
C1
10 F
6.3V X5R
CERAMIC
OUTPUT
–5V AT 1A
1765 F12
C1
2.2 F
6.3V X5R
INPUT
–5V
1765 F13
sn1765 1765fas
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