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| LTC3890-3 Datasheet, PDF (35/40 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller | |||
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Typical Applications
High Efficiency Dual 12V/5V Step-Down Converter
LTC3890-3
RA1
6.98k
RB1
100k
CITH1A 100pF
CITH1 470pF
RITH1
34.8k
CSS1 0.01µF
RFREQ
41.2k
CSS2 0.01µF
CITH2 470pF
RITH2
20k
RA2
18.7k
RB2
100k
SENSE1+
C1
1nF
SENSE1â
PGOOD1
VFB1
BG1
SW1
ITH1
BOOST1
LTC3890-3
TRACK/SS1
TG1
VIN
PLLIN/MODE
SGND
EXTVCC
RUN1
RUN2
FREQ
INTVCC
PGND
TG2
TRACK/SS2 BOOST2
SW2
ITH2
BG2
INTVCC
100k
CB1
0.47µF
D1
CINT
4.7µF
D2
CB2 0.47µF
MBOT1 RSENSE1
9mΩ
L1
8µH
COUT1
180µF
MTOP1
+ CIN
100µF
MTOP2
L2
4.7µH
RSENSE2
10mΩ
MBOT2
VOUT1
12V
3A
VIN
12.5V TO 60V
2.2µF
Ã3
VOUT2
5V
5A
COUT2
470µF
VFB2
SENSE2â
C2
1nF
SENSE2+
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: COILCRAFT SER1360-802KL
L2: COILCRAFT SER1360-472KL
COUT1: 16SVP180MX
COUT2: SANYO 6TPE470M
D1, D2: DFLS1100
38903 TA04
For more information www.linear.com/3890-3
38903f
35
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