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LT3845IFE#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LT3845
22
3845fd
TYPICAL APPLICATIONS
9V-16V to 5V at 10A DC/DC Converter, 500kHz Frequency Operation,
Capable of Withstanding 36V Transients, All Ceramic Capacitors, Soft-Start and Burst Mode Enabled
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
SGND
D2 BAS19
C5
1μF
16V
C3
8200pF
M1
Si7884DP
M2
Si7884DP
Si1555DL
D1
L1
2.7μH
R
SENSE
0.005Ω
LT3845
C4
2.2μF
16V
C6
1μF
D3B
BAV99
D3A
BAV99
3845 TA03
C2
5600pF
C1
100pF
C
OUT
100μF
6.3V
×4
V
OUT
5V
10A
R3
1.1M
V
IN
9V TO 16V
36V TRANSIENTS
C
IN2
0.1μF
50V
R6
23.2k
R4
10k
R1
49.9k
R2
154k
C
IN
6.8μF
50V
×4
C
IN
: TDK C4532X7R1H685K
C
OUT
: MURATA GRM32ER60J107ME20
D1: DIODES INC. B170
L1: WURTH 744318270LF
Effi ciency and Power Loss
LOAD CURRENT (A)
0.1
70
EFFICIENCY (%)
POWER LOSS (W)
75
80
85
90
100
110
3845 TA03b
95
0
1
2
3
4
6
5
V
IN
= 9V
V
IN
= 14V
V
IN
= 16V
POWER LOSS
V
IN
= 14V
LT3845
23
3845fd
TYPICAL APPLICATIONS
9V-24V to 3.3V, 2-Phase at 10A per Phase, DC/DC Converter with Spread Spectrum Operation
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
SGND
C5
1μF
16V
D2 BAS19
C3 8200pF
C11
47pF
M1
Si7850DP
M2
Si7850DP
D1
B160
L1
4.7μH
R
SENSE
0.005Ω
LT3845
C4
2.2μF
16V
R3
1.21M
R4
1.21M
V
IN
24V
R6
130k
SYNC
C
IN
6.8μF
50V
×2
C
IN
: TDK C4532X7R1H685K
C
OUT
: MURATA GRM32ER60J107ME20
D1, D3: DIODES, INC. B160
L1, L2: VISHAY IHLP-5050FD-01
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
SGND
C10
1μF
16V
C8 8200pF
M3
Si7850DP
M4
Si7850DP
D3
B160
L2
4.7μH
R
SENSE2
0.005Ω
LT3845
C9
2.2μF
16V
3845 TA05
R10
130k
R9
4.99k
C7
5600pF
C6
47pF
C
IN3
0.1μF
100V
SYNC1
SYNC2
SYNC
R1
10k
R11
500k
R12
25k
D5
5.7V
C11
0.1μF
Q1
R2
16.8k
LTC6908-1
V
+
GND
SET3
6
5
4
1
2
3
OUT1
OUT2
MOD
C
OUT
100μF
6.3V
×6
V
OUT
3.3V
20A
D4 BAS19
LT3845
24
3845fd
PACKAGE DESCRIPTION
FE Package
16-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
Exposed Pad Variation BC
FE16 (BC) TSSOP 0204
0.09 – 0.20
(.0035 – .0079)
0o – 8o
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
N Package
16-Lead PDIP
(Reference LTC DWG # 05-08-1510)
N16 1002
.255 p .015*
(6.477 p 0.381)
.770*
(19.558)
MAX
16
1
2
3
4
5
6
7
8
910
11
12
13
14
15
.020
(0.508)
MIN
.120
(3.048)
MIN
.130 p .005
(3.302 p 0.127)
.065
(1.651)
TYP
.045 – .065
(1.143 – 1.651)
.018 p .003
(0.457 p 0.076)
.008 – .015
(0.203 – 0.381)
.300 – .325
(7.620 – 8.255)
.325
+.035
–.015
+0.889
–0.381
8.255

NOTE:
1. DIMENSIONS ARE
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
.100
(2.54)
BSC
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

LT3845IFE#TRPBF

Mfr. #:
Buy LT3845IFE#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators High Voltage Synch Current Mode Step-Down Controller
Lifecycle:
New from this manufacturer.
Delivery:
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