LTC4444 Linear Technology, LTC4444 Datasheet - Page 10

• Manufacturer Part Number: LTC4444
• Description: High Voltage Synchronous N-Channel MOSFET Driver
• Manufacturer: Linear Technology

LTC4444
APPLICATIONS INFORMATION
C. Plan the power/ground routing carefully. Know where
D. Keep the copper trace between the driver output pin
TYPICAL APPLICATION
10
the large load switching current is coming from and
going to. Maintain separate ground return paths for
the input pin and the output power stage.
and the load short and wide.
1000pF
0.1μF
100V
0.022μF
2.2μF, 100V, TDK C4532X7R2A225MT
C1: SANYO 100ME100HC +T
C2, C3: SANYO 63ME220HC + T
D1: ON SEMI MMDL770T1G
D2: DIODES INC. 1N5819HW-7-F
47pF
100pF
220k
V
OS +
SENSE
SENSE
487k
1%
V
+
–
15k
IN
100Ω
100Ω
220k
8.25k
1%
D5
68pF
LTC3780 High Effi ciency 36V-72V V
D3, D4: DIODES INC. PDS560-13
D5: DIODES INC. MMBZ5230B-7-F
D6: DIODES INC. B1100-13-F
L1: SUMIDA CDEP147NP-100MC-125
R1, R2: VISHAY DALE WSL2512R0250FEA
10
11
12
1
2
3
4
5
6
7
8
9
0.1μF
16V
PGOOD
SS
SENSE
SENSE
I
V
SGND
RUN
FCB
PLLFLTR
PLLIN
STBYMD
TH
OSENSE
10k
LTC3780EG
+
–
6V
BOOST1
BOOST2
EXTV
INTV
PGND
SW1
SW2
98
97
96
95
D2
BG1
BG2
TG1
TG2
V
CC
CC
IN
1
24
23
22
21
20
19
18
17
16
15
14
13
2
0.1μF
16V
6V
LOAD CURRENT (A)
V
V
V
IN
IN
IN
6V
10μF
10V
Effi ciency
= 36V
= 48V
= 72V
3
IN
0.1μF
to 48V/6A Buck-Boost DC/DC Converter
16V
10V TO 12V
1μF
16V
E. Be sure to solder the Exposed Pad on the back side of
V
4
BIAS
the LTC4444 package to the board. Correctly soldered
to a 2500mm
LTC4444 has a thermal resistance of approximately
40°C/W for the MS8E package. Failure to make good
thermal contact between the exposed back side and
the copper board will result in thermal resistances far
greater than 40°C/W.
5
1
2
4
4444 TA02b
TINP
BINP
BG
1μF
16V
6
10V TO 12V
LTC4444
V
GND
V
SENSE
SENSE
BIAS
CC
3
9
BOOST
+
–
2
TG
TS
doublesided 1oz copper board, the
10Ω
10Ω
D1
6
7
8
R1
0.025Ω
1W
0.22μF
16V
10μH
L1
D6
R2
0.025Ω
1W
4444 TA02a
D3
www.DataSheet4U.com
2.2μF
100V
×4
D4
+
2.2μF
100V
×8
C1
100μF
100V
V
+
V
IN
OS
+
10Ω
C2,C3
220μF
63V
×2
V
OUT
4444f