LTC3708_15 Datasheet, PDF (27/32 Pages) Linear Technology – Fast 2-Phase, No RSENSE Buck Controller with Output Tracking

LTC3708
APPLICATIONS INFORMATION
5V
10Ω 1μF
D_B1
4.7μF _100k
D_B2
C_IN
10μF
25V
s6
V_IN
7V TO 24V
V_OUT1
2.5V
15A
C_OUT1 +
330μF
4V
s2
12.1k
1%
6.04k
1%
M1
L1
1.43μH
19.1k
1%
B340LA
M3
56pF
V_IN
R_ON1
1.5M
6.04k
1%
1000pF
15k
470pF
3.32k
0.01μF
150pF
C_B1
0.1μF
470pF
C_SS
0.1μF
V_CC DRV_CC PGOOD
TG1
TG2
BOOST1
BOOST2
SW1
SENSE1⁺
SW2
SENSE2⁺
M2
C_B2
0.1μF
B340LA
L2
1.22μH
BG1 LTC3708 BG2
SENSE1^–
PGND1
SENSE2^–
PGND2
V_FB1
TRACK2
I_ON1
I_TH1
INTLPF
RUN/SS
SGND
V_RNG1
V_FB2
FCB
I_ON2
I_TH2
EXTLPF
TRACK1
V_RNG2
f_IN
130k
M4
FREQ = 220kHz
12.1k
1%
V_IN
R_ON2
1.1M
475Ω
1000pF
15k
150pF
1000pF
+ C_OUT2
470μF
2.5V
s2
6.04k
1%
V_OUT2
1.8V
15A
24.9k
0.047μF
5V
470pF
3708 F17
C_OUT1: SANYO POSCAP 4TPD330M
C_OUT2: SANYO POSCAP 2R5TPD470M
C_IN: TAIYO YUDEN: TMK325BJ106KM
DB1, DB2: CMDSH-3
L1: PANASONIC ETQP3H1R4BF
L2: PANASONIC ETQP2H1R2BF
M1, M2: RENESAS HAT2168H
M3, M4: RENESAS HAT2165H
Figure 17. High Efficiency, Dual Output Power Supply with External Frequency Synchronization
3708fb
27