LTC3805-5
16
38055fe
TYPICAL APPLICATIONS
Figure 8. 5.5V to 40V to 12V/2A SEPIC Converter
LTC3805-5
0.1µF
4.7µF
BAS516
10k
6.8nF
GND
I
TH
SSFLT
GATE
FB
RUN
FS
V
CC
OC
I
SENSE
SYNC
1
2
3
4
5
10
9
8
7
6
11
T1
10µF
50V
D1
PDS760
4.56µH
BH510-1009
C
IN
10µF
50V
C
OUT
47µF
16V
R4 7.15k
69.8k
80.6k
3.01k
R
SENSE
0.005Ω
38055 F08
Q1
HAT2266
V
OUT
12V
2A
R3
100k
301W
221k
57.6k
V
IN
5.5V T0 40V
PDZ6.8B
MMBT6428LT1
LOAD CURRENT (A)
0.01
40
EFFICIENCY (%)
POWER LOSS (W)
50
60
70
80
0.1 1 10
38055 TA04b
30
20
10
0
90
100
0.5
1.0
1.5
2.0
2.5
0
3.0
3.5
5.5V
10V
20V
30V
40V
EFFICIENCY
POWER LOSS
Efficiency and Power Loss vs Load Current
LTC3805-5
17
38055fe
TYPICAL APPLICATIONS
Figure 9. Isolated Telecom Supply: 18V to 72V Input to 3.3V/3A Output
Efficiency and Power Loss vs Load Current and V
IN
LOAD CURRENT (A)
0.01
60
EFFICIENCY (%)
POWER LOSS (W)
80
100
0.1 1 10
38055 TA03b
40
50
70
90
30
20
2.0
3.0
4.0
1.0
1.5
2.5
3.5
0.5
0
18V
36V
48V
60V
72V
EFFICIENCY
POWER LOSS
V
IN
OC
COMP
FB
GND
OPTO
75k15.8k
F
0.47µF
100k
47pF
22.1k
2200pF
250VAC
274Ω
2.2nF
221k
BAS516
BAS516
D2
BAS516
FDC2512
V
IN
V
CC
V
CC
11
5
4
3
2
1
6
7
8
2
3
4
PA1277NL
1
7
6
5
8
D1
PDS1040
100µF
6.3V
100µF
6.3V
100µF
6.3V
9
1
3
2
6
4
5
10
R
BIAS
402Ω
10W
BAS516 BA760
68Ω
150pF
200V
PDZ6.8B
6.8V
MMBTA42
V
IN
6.8k
221k
U1
LTC3805-5
I
TH
GND
SSFLT
RUN
GATE
OC
I
SENSE
SYNCFS
FB
V
CC
56k
38055 F09
0.04Ω
V
OUT
+
3.3V
3A
V
OUT
PS2801-1-K
U2
LT4430
V
IN
+
18V TO
72V
2.2µF
100V
2.2µF
100V
0.022µF
F
221k
3.01k
LTC3805-5
18
38055fe
DD Package
10-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1699 Rev B)
MSE Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1664 Rev C)
PACKAGE DESCRIPTION
3.00 ±0.10
(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2).
CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
0.40 ± 0.10
BOTTOM VIEW—EXPOSED PAD
1.65 ± 0.10
(2 SIDES)
0.75 ±0.05
R = 0.125
TYP
2.38 ±0.10
(2 SIDES)
15
106
PIN 1
TOP MARK
(SEE NOTE 6)
0.200 REF
0.00 – 0.05
(DD) DFN REV B 0309
0.25 ± 0.05
2.38 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.65 ±0.05
(2 SIDES)2.15 ±0.05
0.50
BSC
0.70 ±0.05
3.55 ±0.05
PACKAGE
OUTLINE
0.25 ± 0.05
0.50 BSC
MSOP (MSE) 0908 REV C
0.53 ± 0.152
(.021 ± .006)
SEATING
PLANE
0.18
(.007)
1.10
(.043)
MAX
0.17 – 0.27
(.007 – .011)
TYP
0.86
(.034)
REF
0.50
(.0197)
BSC
1 2
3
4 5
4.90 ± 0.152
(.193 ± .006)
0.497 ± 0.076
(.0196 ± .003)
REF
8910
10
1
7
6
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.254
(.010)
0° – 6° TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.889 ± 0.127
(.035 ± .005)
RECOMMENDED SOLDER PAD LAYOUT
0.305 ± 0.038
(.0120 ± .0015)
TYP
2.083 ± 0.102
(.082 ± .004)
2.794 ± 0.102
(.110 ± .004)
0.50
(.0197)
BSC
BOTTOM VIEW OF
EXPOSED PAD OPTION
1.83 ± 0.102
(.072 ± .004)
2.06 ± 0.102
(.081 ± .004)
0.1016 ± 0.0508
(.004 ± .002)
DETAIL “B”
DETAIL “B”
CORNER TAIL IS PART OF
THE LEADFRAME FEATURE.
FOR REFERENCE ONLY
NO MEASUREMENT PURPOSE
0.05 REF
0.29
REF

LTC3805EDD-5#TRPBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Selectable Frequency Current Mode Flyback DC/DC Controller
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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