LTC3859_15 Datasheet, PDF (42/42 Pages) Linear Technology – Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller

LTC3859
TYPICAL APPLICATION
High Efficiency Wide Input Range Dual 3.3V/8.5V Converter
V_OUT1
R_A1
68.1k
15pF
R_B1
215k
C_ITH1
820pF
C_ITH1A
150pF
R_ITH1
15k
C_SS1
0.1μF
LTC3859
V_FB1
SENSE1^–
SENSE1⁺
I_TH1
PGOOD1
TG1
TRACK/SS1
SW1
FREQ
BOOST1
C1
1nF
100k
C_B1
0.1μF
MTOP1
C1
10μF _L1
3.2μH
R_SENSE1
6mΩ
PLLIN/MODE BG1
MBOT1
V_OUT1
3.3V
5A
C_OUT1
150μF
V_OUT2
R_A2
68.1k
10pF
R_B2
649k
C_ITH2
2.2nF
R_ITH2
15k
C_ITH2A
68pF
SGND
RUN1
RUN2
RUN3
V_FB2
I_TH2
V_BIAS
PGND
EXTV_CC
INTV_CC
D1
C_BIAS
10μF
C_INT1
4.7μF
D2
C2
10μF
C_SS2
0.1μF
V_OUT3
R_A3
68.1k
OPT
R_B3
499k
C_ITH3
0.01μF
R_ITH3
3.6k
C_ITH3A
820pF
TG2
TRACK/SS2 BOOST2
SW2
BG2
V_FB3
SENSE2⁺
I_TH3
SENSE2^–
C_B2
0.1μF
MTOP2 L2
6.5μH
R_SENSE2
8mΩ
MBOT2
V_OUT2
8.5V
3A
C_OUT2
68μF
C2
1nF
C_SS3
0.1μF
SS3
MTOP1, MTOP2: VISHAY Si7848DP
MBOT1, MBOT2: BSZ097NO4LS
MTOP3: BSC027NO4LS
OV3
MBOT3: BSCO1BN04LS
L1: SUMIDA CDEP105-3R2M
L2: WÜRTH 744314650
L3: WÜRTH 744325120
C_OUT1: SANYO 6TPB220ML
C_OUT2: SANYO 4TPE150M
C_IN, C_OUT3: SANYO 50CE220LX
D1, D2: CMDH-4E
D3: BAS140W
TG3
SW3
BOOST3
BG3
SENSE3^–
SENSE3⁺
3859 TA02
D3
C_B3
0.1μF
C3
1nF
MTOP3 ^L3
1.2μH
R_SENSE2
2mΩ
MBOT3
V_IN
2.5V TO 38V
(START-UP ABOVE 5V)
C_IN
220μF
* V_OUT3 IS 10V WHEN V_IN < 10V,
FOLLOWS V_IN WHEN V_IN > 10V
V_OUT3
10V*
C_OUT3
220μF
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42 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
Phase-Lockable Fixed Frequency 50kHz to 900kHz,
4V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA/170μA,
Phase-Lockable Fixed Frequency 50kHz to 900kHz,
4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ 24V, I_Q = 50μA
4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 30V, SSOP-24, 5mm ¥ 5mm QFN-32
Phase-Lockable Fixed Frequency 140kHz to 650kHz,
4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 10V, I_Q = 30μA/80μA
Adjustable Fixed Frequency 100kHz to 500kHz, 4V ≤ V_IN ≤ 60V,
1.23V ≤ V_OUT ≤ 36V, I_Q = 120μA, TSSOP-16
Selectable Fixed 200kHz to 600kHz Operating Frequency,
4V ≤ V_IN ≤ 60V, 0.8V ≤ V_OUT ≤ V_IN , I_Q = 40μA, MSOP-10E
3859fa
LT 1010 REV A • PRINTED IN USA
” LINEAR TECHNOLOGY CORPORATION 2010