LTC3870_15 Datasheet, PDF (19/22 Pages) Linear Technology – PolyPhase Step-Down Slave Controller for LTC3880/LTC3883 with Digital Power System Management

LTC3870
Typical Applications
High Efficiency 425kHz 3-phase 1.8V Step-Down Converter with Input Current Sensing
V_IN
6V TO 14V
5mΩ
10µF
D1
1µF
100Ω
1µF
100Ω
10nF
10nF
3Ω
MMBT3906
10µF
10nF
10k
10k
10k
10k
1µF
10k
10k
10k
10k
INTV_CC
TG
M1
I_{IN_SNS}
V_{IN_SNS}
BOOST
SW
0.1µF
LTC3883
BG
M2
V_IN
TSNS
SCL
SDA
PGND
I_SENSE+
I_SENSE–
V_SENSE+
V_SENSE–
V_DD25
1.43k
0.22µF
ALERT
SHARE_CLK
V_DD33
GPIO
RUN
SYNC
PGOOD
I_TH
GND
V_{OUT_CFG}
V_{TRIM_CFG}
ASEL
FREQ_CFG
WP
24.9k
11.3k
20k 16.2k
1µF
17.4k
17.8k
4.99k
2200pF
L0
0.56µH
1µF
1.43k
V_OUT
1.8V
50A
+
530µF
22µF
+
530µF
L1
0.56µH
1µF
1.43k
M3
0.1µF
M5
1.43k
D2
D3
V_IN
TG0
INTV_CC
TG1
M4
BOOST0
BOOST1
0.22µF
SW0
SW1
BG0
BG1
LTC3870
PGND
EXTV_CC
I_SENSE0+
I_SENSE1+
0.1µF
M6
0.22µF 1.43k
4.7µF
L2
0.56µH
1µF
+
530µF
1.43k
100pF
I_SENSE0–
FAULT0
FAULT1
RUN0
RUN1
SYNC
MODE0
MODE1
I_TH0
I_TH1
I_SENSE1–
PHASMD
FREQ
I_LIM
SGND
3870 TA03
100k
D1 TO D3: CENTRAL CMDSH-3TR
L0 TO L2: VISHAY IHLP-4040DZ-11 0.56µH
M1, M3, M4: INFINEON BSC050NE2LS
M2, M5, M6: INFINEON BSC010NE2LSI
For more information www.linear.com/LTC3870
3870fa
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