LT1765-3.3 LINER [Linear Technology], LT1765-3.3 Datasheet - Page 16

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

APPLICATIO S I FOR ATIO
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
16
U
U
* 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
GND
12V
W
Figure 11b. Dual Output Converter (Output Currents)
C3
2.2 F
25V
CERAMIC
V
SHDN
1200
1000
IN
800
600
400
200
SYNC
Figure 11a. Dual Output Converter
0
10
U
Max Negative Load vs
Positive Load
LT1765-5
BOOST
GND
3.3k
R
C
CERAMIC
5V LOAD CURRENT (mA)
V
C
V
100
4.7 F
0.18 F
SW
FB
C
4700pF
16V
C
C4
C2
1000
D1
CMDSH-3
L1B*
D2
L1A*
D3
CERAMIC
1765 F11b
4.7 F
10000
6.3V
4.7 F
6.3V
CERAMIC
OUTPUT
5V AT 1.5A
OUTPUT
–5V
1765 F11a
†
AT 1.1A
sn1765 1765fas