LTC3890-3 Datasheet, PDF (36/40 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

LTC3890-3
Typical Applications
High Efficiency Dual 24V/5V Step-Down Converter
R_B1
487k
C_F1 33pF
R_A1
16.9k
C_ITH1A 100pF
C_ITH1 680pF
R_ITH1
46k
C_SS1 0.01µF
R_FREQ
60k
C_SS2 0.01µF
C_ITH2 470pF
R_ITH2
20k
R_A2
18.7k
R_B2 100k
SENSE1⁺
C1
1nF
SENSE1^–
PGOOD1
V_FB1
BG1
SW1
ITH1
BOOST1
LTC3890-3
TRACK/SS1
TG1
V_IN
PLLIN/MODE
SGND
EXTV_CC
RUN1
RUN2
FREQ
INTV_CC
PGND
TG2
TRACK/SS2
ITH2
BOOST2
SW2
BG2
V_FB2
SENSE2^–
C2
1nF _SENSE2+
INTV_CC
100k
C_B1
0.47µF
D1
C_INT
4.7µF
D2
C_B2 0.47µF
MBOT1 L1
22µH
R_SENSE1
25mΩ
MTOP1
V_OUT1
24V
1A
C_OUT1
22µF
×2 CERAMIC
+ _CIN
100µF
V_IN
28V TO 60V
2.2µF
×3
MTOP2
L2
4.7µH
R_SENSE2
10mΩ
MBOT2
V_OUT2
5V
5A
C_OUT2
470µF
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: SUMIDA CDR7D43MN
L2: COILCRAFT SER1360-472KL
C_OUT1: KEMET T525D476MO16E035
C_OUT2: SANYO 6TPE470M
D1, D2: DFLS1100
38903 TA05
36
For more information www.linear.com/3890-3
38903f