LTC3736_15 Datasheet, PDF (24/28 Pages) Linear Technology – Dual 2-Phase, No RSENSE, Synchronous Controller with Output Tracking

LTC3736
APPLICATIO S I FOR ATIO
V_IN
R_IN
+
C_IN
MP1
L1
V_OUT1
+
MN1
C_OUT1
R_L1
BOLD LINES INDICATE
HIGH, SWITCHING
CURRENT LINES.
KEEP LINES TO A
MINIMUM LENGTH
MP2
MN2
L2
V_OUT2
+
C_OUT2
R_L2
3736 F14
Figure 14. Branch Current Waveforms
TYPICAL APPLICATIO S
V_IN
5V
C_IN
10µF
×2
R_FB1A
59k
R_FB1B
187k
C_ITH1A
100pF
C_ITH1
R_ITH1
15k
220pF
R_VIN 10Ω
22
SW1
SENSE1^{+ 21}
MP1
23
24
1
2
IPRG1
V_FB1
I_TH1
IPRG2
PGND
BG1
SYNC/FCB
TG1
20
19
18
17
3
4
PLLLPF
SGND
PGND ¹⁶
TG2 ¹⁵
5
LTC3736EUF
V_IN
RUN/SS
14
13
C_ITH2
C_VIN 220pF
1µF
R_ITH2
15k
9
7
8
6
PGOOD
V_FB2
I_TH2
TRACK
BG2
PGND
SENSE2⁺
12
11
SW2 ¹⁰
PGND
MP2
C_SS
10nF
C_ITH2B
25
100pF
MN1
Si7540DP
L1
1.5µH
+
V_OUT1
2.5V
5A
C_OUT1
150µF
MN2
Si7540DP
L2
1.5µH
C_OUT2
150µF _VOUT2
1.8V
5A
R_FB2A
59k
R_TRACKA ^RFB2B R_TRACKB
59k ^118k 118k
3736 F15
Figure 15. 2-Phase, 550kHz, Dual Output Synchronous DC/DC Converter
24
3736fa