LTC3736-2 Datasheet, PDF (28/28 Pages) Linear Technology – Dual 2-Phase, No RSENSE Synchronous Controller with Output Tracking

LTC3736-2
TYPICAL APPLICATIO
2-Phase, 750kHz, Dual Output Synchronous DC/DC Converter
V_IN
3.3V
C_IN
22µF
R_FB1A
59k
C_ITH1A
100pF
R_FB1B
187k
C_FF1
22pF
C_ITH1
R_ITH1
22k
1000pF
R_VIN 10Ω
C_ITH2
C_VIN 1000pF
1µF
R_ITH2
22k
C_SS
10nF
C_ITH2A
100pF
22
SW1
SENSE1^{+ 21}
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-2
V_IN
RUN/SS
14
13
9
7
8
6
PGOOD
V_FB2
I_TH2
TRACK
BG2
PGND
SENSE2⁺
12
11
SW2 ¹⁰
PGND
25
MP1
Si3447BDV
MP2
Si3447BDV
L1
1.5µH
MN1
D1
Si3460DV
D2
MN2
Si3460DV
L2
1.5µH
R_FB2A
59k
R_TRACKA ^RFB2B R_TRACKB
59k ^118k 118k
L1, L2: VISHAY IHLP-2525CZ-01
D1, D2: OPTIONAL
V_OUT1
2.5V
4A
C_OUT1
47µF
×2
C_OUT2
47µF
×2 _VOUT2
1.8V
4A
37362 F16
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37362fa
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT 0206 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005