LTC3865 Datasheet, PDF (33/36 Pages) Linear Technology – Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

LTC3865/LTC3865-1
TYPICAL APPLICATIONS
3.3µF
50V
2.2Ω
C_IN2
1µF
V_OUT1
3.6V
10A
0.004Ω
HAT2266H
L1
2.2µH
4.7µF _D3
CMDSH-3
0.1µF
HAT2266H
PLLIN
400kHz
100Ω
V_IN PGOOD EXTV_CC INTV_CC
TG1
TG2
BOOST1
SW1
BG1
LTC3865
BOOST2
SW2
BG2
MODE/PLLIN
PGND
I_LIM
SENSE1⁺
FREQ
SENSE2⁺
50k
1%
+ C_OUT1
220µF ^10k
s2
1%
1nF
100Ω
1800pF
17.8k
1%
100pF
RUN1
SENSE1^–
VID11
VID12
V_OSENSE1
I_TH1
TK/SS1
SGND
RUN2
SENSE2^–
VID21
VID22
V_OSENSE2
I_TH2
TK/SS2
0.1µF
0.1µF
3.3µF
50V
D4
CMDSH-3
0.1µF
HAT2266H
+ C_IN1
22µF
50V
V_IN
7V TO 36V
HAT2266H
L2
1.2µH
0.004Ω
1nF
2200pF
121k
14.7k
1%
100Ω
100Ω
23.2k
1%
+
100pF
10k
1%
V_OUT2
2V
10A
C_OUT2
220µF
s2
C_OUT1, C_OUT2: SANYO 4TPE 220µF
L1: TOKO FDA1055-2R2M
L2: TOKO FD1055-1R2M
3865 F17
Figure 17. High V_IN, 3.6V/10A, 2V/10A Converter With External Sense Resistors Synchronized at 400kHz
10µF
35V
2.2Ω
1µF
RJK0305DPB
L1
0.47µH
4.7µF
D3
0.1µF
RJK0330DPB
2mΩ
100Ω
100Ω
0.1µF
+
C_OUT1
6800pF
1.21k
220µF _1%
100pF
V_IN PGOOD EXTV_CC INTV_CC
TG1
TG2
BOOST1
SW1
BG1
LTC3865
BOOST2
SW2
BG2
MODE/PLLIN
PGND
I_LIM
SENSE1⁺
FREQ
SENSE2⁺
RUN1
SENSE1^–
VID11
VID12
V_OSENSE1
I_TH1
TK/SS1
SGND
RUN2
SENSE2^–
VID21
VID22
V_OSENSE2
I_TH2
TK/SS2
0.1µF
V_IN
10µF
35V
+
22µF
50V
7V TO 20V
D4
0.1µF
RJK0330DPB
RJK0305DPB
L2
0.47µH
100Ω
0.1µF
100Ω
2mΩ
1.2V
30A
+ _COUT2
162k
220µF
C_OUT1, C_OUT2: SANYO 4TPE 220µF
L1, L2: VISHAY IHLP4040DZERR47M11
0Ω
RUN1
RUN2
3865 F18
Figure 18. High Current, Single Output, 1.2V/30A Converter Using Sense Resistors
3865f
33