LTC4444_15 Datasheet, PDF (11/14 Pages) Linear Technology – High Voltage Synchronous N-Channel MOSFET Driver

LTC4444
TYPICAL APPLICATION
LTC3780 High Efficiency 36V to 72V V_IN to 48V/6A Buck-Boost DC/DC Converter
0.022μF
1000pF
100Ω
SENSE⁺
220k
68pF
100Ω
100pF SENSE^–
0.1μF
100V
V_OS+ 487k
1%
8.25k
1%
47pF
D5
15k
220k
V_IN
2.2μF, 100V, TDK C4532X7R2A225MT
C1: SANYO 100ME100HC +T
C2, C3: SANYO 63ME220HC + T
D1: ON SEMI MMDL770T1G
D2: DIODES INC. 1N5819HW-7-F
6V
10k
D2
1
PGOOD
24
BOOST1
2
SS
LTC3780EG TG1 ²³
3 _SENSE+
22
SW1
4 _SENSE–
5
I_TH
6
V_OSENSE
7
SGND
21
V_IN
20
EXTV_CC
19
INTV_CC
18
BG1
8
RUN
17
PGND
9
FCB
16
BG2
10
PLLFLTR
15
SW2
11
PLLIN
14
TG2
12
STBYMD
13
BOOST2
0.1μF
16V
V_BIAS
10V TO 12V
0.1μF
16V
6V
1μF
16V
10μF
10V
6V
0.1μF
16V
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
V_BIAS
10V TO 12V
1μF
16V
D1
3
1
V_CC
6
TINP BOOST
2
LTC4444
7
BINP
TG
4
BG
8
TS
GND
9
0.22μF
16V
L1
10μH
D3
D6
10Ω
SENSE⁺
10Ω
SENSE^–
R1
0.025Ω
1W
R2
0.025Ω
1W
4444 TA02a
2.2μF +
100V
s4
V_IN
C1
100μF
100V
V_OS+
10Ω
D4
2.2μF +
100V
V_OUT
C2,C3
220μF
s8
63V
s2
Efficiency
98
V_IN = 36V
V_IN = 48V
97
V_IN = 72V
96
95
1
2
3
4
5
6
LOAD CURRENT (A)
4444 TA02b
4444fb
11