Datasheet

LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
16
1765fd
APPLICATIONS INFORMATION
Figure 11a. Dual Output Converter
OUTPUT
5V AT 1.5A
OUTPUT
–5V
†
AT 1.1A
* L1 IS A SINGLE CORE WITH TWO WINDINGS
COILTRONICS CTX5-1A
†
IF LOAD CAN GO TO ZERO, AN OPTIONAL
PRELOAD OF 1k TO 5k MAY BE USED TO
IMPROVE LOAD REGULATION
D1, D3: B220A
INPUT
12V
GND
1765 F11a
C2
0.18μF
C
C
4700pF
R
C
3.3k
D1
4.7μF
6.3V
CERAMIC
4.7mF
6.3V
CERAMIC
C3
2.2μF
25V
CERAMIC
C4
4.7μF
16V
CERAMIC
D2
CMDSH-3
D3
L1A*
L1B*
BOOST
LT1765-5
V
IN
V
SW
FBSHDN
GND
V
C
SYNC
Figure 11b. Dual Output Converter (Output Currents)
5V LOAD CURRENT (mA)
10 100 1000 10000
MAX –5V LOAD (mA)
1765 F11b
1200
1000
800
600
400
200
0
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