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LT1765EFE#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
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
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
17
1765fd
APPLICATIONS INFORMATION
Figure 12. Positive-to-Negative Low Output Ripple Converter
C
C
1800pF
R
C
2.4k
C
F
100pF
OUTPUT
–5V AT 1A
L1: CDRH6D28-3R0
INPUT
5V
1765 F12
C2
0.22μF
D1
B220A
C1
10μF
6.3V X5R
CERAMIC
C3
2.2μF
16V X5R
CERAMIC
D2
CMDSH-3
L1
3μH
D3
B220A
BOOST
U1
LT1765-5
V
IN
22μF
V
SW
FB
SYNC
SHDN
GND
V
C
Figure 13. Negative Boost Converter
S
S
S
S
S
SS
S
S
S
S
S
S
S
INPUT
–5V
L1: CDRH5D28-2R5
BOLD LINES INDICATE HIGH CURRENT PATHS
OUTPUT
–9V AT 1A
1765 F13
C2
0.22μF
C
C
4700pF
R
C
6.8k
D1
UPS120
C1
2.2μF
6.3V X5R
C3
22μF
16V X5R
CERAMIC
D2
CMDSH-3
L1
2.5μH
BOOST
U1
LT1765FE
V
IN
V
SW
FB
SYNC
SHDN
GND
V
C
R2
10k
C
F
100pF
R1
64.9k
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
18
1765fd
PACKAGE DESCRIPTION
FE Package
16-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
Exposed Pad Variation BB
FE16 (BB) TSSOP 0204
0.09 – 0.20
(.0035 – .0079)
0° – 8°
0.25
REF
0.50 – 0.75
(.020 – .030)
4.30 – 4.50*
(.169 – .177)
134
5
6
7
8
10 9
4.90 – 5.10*
(.193 – .201)
16 1514 13 12 11
1.10
(.0433)
MAX
0.05 – 0.15
(.002 – .006)
0.65
(.0256)
BSC
2.94
(.116)
0.195 – 0.30
(.0077 – .0118)
TYP
2
RECOMMENDED SOLDER PAD LAYOUT
0.45 p0.05
0.65 BSC
4.50 p0.10
6.60 p0.10
1.05 p0.10
2.94
(.116)
3.58
(.141)
3.58
(.141)
MILLIMETERS
(INCHES)
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
SEE NOTE 4
4. RECOMMENDED MINIMUM PCB METAL SIZE
FOR EXPOSED PAD ATTACHMENT
6.40
(.252)
BSC
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LT1765EFE#PBF

Mfr. #:
Buy LT1765EFE#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Mono 3A, 1.25MHz Buck Sw Regs
Lifecycle:
New from this manufacturer.
Delivery:
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