Datasheet

LTC4444-5
11
44445fc
TYPICAL APPLICATION
LTC3780 High Efficiency 36V to 72V V
IN
to 48V/6A Buck-Boost DC/DC Converter
Efficiency
PGOOD
SS
SENSE
+
SENSE
–
I
TH
V
OSENSE
SGND
RUN
FCB
PLLFLTR
PLLIN
STBYMD
BOOST1
TG1
SW1
V
IN
EXTV
CC
INTV
CC
BG1
PGND
BG2
SW2
TG2
BOOST2
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
LTC3780EG
10k
100
100
220k
V
OS
+
15k
220k
487k
1%
8.25k
1%
1000pF
100pF
47pF
V
IN
D5
0.1µF
100V
68pF
0.022µF
0.1µF
16V
2.2µF, 100V, TDK C4532X7R2A225MT
C1: SANYO 100ME100HC +T
C2, C3: SANYO 63ME220HC + T
D1: ON SEMI MMDL770T1G
D2: DIODES INC. 1N5819HW-7-F
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
0.1µF
16V
V
BIAS
10µF
10V
1µF
16V
0.22µF
16V
L1
10µH
2.2µF
100V
s4
C1
100µF
100V
V
IN
36V TO 72V
1µF
16V
0.1µF
16V
V
BIAS
V
BIAS
6V
D1
SENSE
+
SENSE
–
V
BIAS
D2
1
2
4
6
7
8
9
3
V
CC
GND
TG
BOOST
TINP
BINP
LTC4444-5
TSBG
+
2.2µF
100V
s8
C2,C3
220µF
63V
s2
V
OUT
48V
6A
+
R1
0.025
1W
44445 TA02a
D6
SENSE
+
SENSE
–
D3 D4
R2
0.025
1W
10
10W
V
OS
+
10
LOAD CURRENT (A)
95
EFFICIENCY (%)
96
97
98
21345
44445 TA02b
6
V
IN
= 36V
V
IN
= 48V
V
IN
= 72V