LTC3855_15 Datasheet, PDF (40/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense

LTC3855
Typical Applications
2.2Ω
1µF
22µF
50V
V_IN
7V TO
24V
V_OUT1
3.3V
5A
+
Si4816BDY
M1
L2
2.2µH
8mΩ
15pF
90.9k
1%
C_OUT1
220µF
20k
1%
4.7µF
0.1µF
10Ω
1000pF
10Ω
1000pF
10k 100pF
1%
D3
V_IN PGOOD INTV_CC
D4
TG1
TG2
0.1µF
BOOST1
BOOST2
SW1
SW2
BG1 ^LTC3855
BG2
MODE/PLLIN
I_LIM
SENSE1⁺
CLKOUT
PGND
FREQ
SENSE2⁺
SENSE1^–
SENSE2^–
RUN1
DIFFP
DIFFN
DIFFOUT
V_FB1
I_TH1
RUN2
EXTV_CC
V_FB2
I_TH2
TK/SS1 SGND TK/SS2
0.1µF
0.1µF
10Ω
1000pF
10Ω
1000pF
122k ^15k
1% ^1%
L1: TDK RLF 7030T-2R2M5R4
L2: TDK ULF10045T-3R3N6R9
C_OUT1: SANYO 4TPE220MF
C_OUT2: SANYO 6TPE150MI
Figure 24. 3.3V/5A, 5V/5A Converter Using Sense Resistors
Si4816BDY
M2
L2
3.3µH
8mΩ
10pF
100pF
147k
1%
20k ⁺
1%
3855 F24
V_OUT2
5V
5A
C_OUT2
150µF
3855f
40