LTC3736_15 Datasheet, PDF (25/28 Pages) Linear Technology – Dual 2-Phase, No RSENSE, Synchronous Controller with Output Tracking

LTC3736
TYPICAL APPLICATIO S
R_FB1A
59k
R_FB1B
187k
V_IN
3.3V
C_IN
22µF
C_ITH1A
100pF
C_ITH1
R_ITH1
22k
470pF
R_VIN 10Ω
C_ITH2
C_{VIN 470pF}
1µF
R_ITH2
22k
C_SS
10nF
C_ITH2A
100pF
22
SW1
SENSE1^{+ 21}
23
24
1
2
3
4
IPRG1
PGND
V_FB1
BG1
I_TH1 SYNC/FCB
IPRG2
TG1
PLLLPF PGND
SGND
TG2
20
19
18
17
16
15
5
LTC3736EUF
V_IN
RUN/SS
14
13
9
7
8
6
PGOOD
V_FB2
I_TH2
TRACK
BG2
PGND
SENSE2⁺
SW2
12
11
10
PGND
25
MP1
Si3447BDV
MP2
Si3447BDV
L1
1.5µH
MN1
D1
Si3460DV
D2
MN2
Si3460DV
L2
1.5µH
V_OUT1
2.5V
2A
C_OUT1
22µF
×2
C_OUT2
22µF
×2 _VOUT2
1.8V
2A
R_FB2A
59k
R_TRACKA ^RFB2B R_TRACKB
59k ^118k 118k
L1, L2: VISHAY IHLP-2525CZ-01
3736 F16
Figure 16. 2-Phase, 750kHz, Dual Output Synchronous DC/DC Converter with Ceramic Output Capacitors
V_IN
3.3V
C_IN
22µF
R_FB1A
59k
C_FF1
100pF
R_FB1B
187k
C_ITH1
220pF
R_ITH1
15k
C_LP
10nF
R_LP
15k
R_VIN 10Ω
C_ITH2
C_{VIN 220pF}
1µF
R_ITH2
15k
1
2
3
4
5
SW1
IPRG1
V_FB1
I_TH1
IPRG2
SENSE1⁺
PGND
BG1
SYNC/FCB
TG1
24
23
22
21
20
6 _{PLLLPF PGND} 19
7 _SGND
TG2 ¹⁸
5
LTC3736EGN
V_IN
RUN/SS
17
16
12
10
11
9
PGOOD
V_FB2
I_TH2
TRACK
BG2
PGND
SENSE2⁺
SW2
15
14
13
R_FB2A
59k
R_TRACKA R_{FB2B RTRACKB}
59k 118k _118k
C_FF1
100pF
CLK IN
MP1
SW1
MN1
Si7540DP
L1
1.5µH
+
V_OUT1
2.5V
3A
C_OUT1
150µF
MN2
Si7540DP
C_OUT2
150µF _VOUT2
1.8V
MP2
SW2
L2
4A
1.5µH
C_OUT1, C_OUT2: SANYO 4TPB150MC
L1, L2: VISHAY IHLP-2525CZ-01
3736 F17
Figure 17. 2-Phase, Synchronizable, Dual Output Synchronous DC/DC Converter
3736fa
25