ltc3858-2 Linear Technology Corporation, ltc3858-2 Datasheet - Page 40

• Manufacturer Part Number: ltc3858-2
• Description: Ltc3858-2 - Low Iq, Dual 2-phase Synchronous Step-down Controller
• Manufacturer: Linear Technology Corporation

RELATED PARTS
LTC3858-2
TYPICAL APPLICATION
40
PART NUMBER
LTC3859
LTC3868/LTC3868-1 Low I
LTC3857/LTC3857-1 Low I
LTC3890/LTC3890-1 60V, Low I
LTC3834/LTC3834-1 Low I
LTC3835/LTC3835-1 Low I
LTC3891
LTC3824
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
3300pF
49.9k
C
DESCRIPTION
Low I
DC/DC Controller
Down DC/DC Controllers with 99% Duty Cycle
Down DC/DC Controllers with 99% Duty Cycle
DC/DC Controller with 99% Duty Cycle
60V, Low I
Controller with 99% Duty Cycle
Low I
Cycle
R
ITH1
A1
●
Q
Q
Q
Q
Q
Q
, Triple Output Buck/Buck/Boost Synchronous
, Dual Output 2-Phase Synchronous Step-
, Dual Output 2-Phase Synchronous Step-
, Synchronous Step-Down DC/DC Controllers Phase-Lockable Fixed Operating Frequency 140kHz to 650kHz,
, Synchronous Step-Down DC/DC Controllers Phase-Lockable Fixed Operating Frequency 140kHz to 650kHz,
, High Voltage DC/DC Controller, 100% Duty
FAX: [phone]
698k
10pF
R
C
R
2.94k
B1
F1
ITH1
Q
Q
, Dual 2-Phase Synchronous Step-Down
, Synchronous Step-Down DC/DC
1nF
1nF
C
C1
C2
0.1μF
68pF
C
ITH1A
V
SS1
V
OUT
I
SS1
TH1
FB1
High Efficiency 2-Phase 12V/150W Step-Down Converter
SENSE1
SENSE1
V
I
SS1
I
PHASMD
CLKOUT
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
SS2
I
V
SENSE2
SENSE2
TH1
LIM
TH2
FB1
FB2
●
www.linear.com
CC
LTC3858-2
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
BG2
TG2
V
CC
IN
C
L1, L2: SUMIDA CDEP106-6ROM
MTOP1, MTOP2: INFINEON BSZ097N04LS
MBOT1, MBOT2: INFINEON BSZ097N04LS
100k
100k
OUT1
D1
D2
, C
COMMENTS
Outputs (≥5V) Remain in Regulation Through Cold Crank 2.5V ≤ V
V
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V≤ V
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
4V ≤ V
4V ≤ V
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
Selectable Fixed 200kHz to 600kHz Operating Frequency 4V ≤ V
0.8V ≤ V
OUT2
OUT(BUCKS)
INTV
C
0.47μF
C
0.47μF
B1
B2
: SANYO 16TQC22M
IN
CC
C
4.7μF
IN
IN
IN
IN
IN
INT
≤ 38V, 0.8V ≤ V
OUT
≤ 24V, 0.8V ≤ V
≤ 60V, 0.8V ≤ V
≤ 36V, 0.8V ≤ V
≤ 36V, 0.8V ≤ V
≤ 60V, 0.8V ≤ V
Up to 24V, V
≤ V
MTOP2
MBOT1
MTOP1
MBOT2
IN
, I
Q
C
10μF
50V
= 40μA, MSOP-10E
IN
6μH
6μH
L1
L2
OUT
OUT
OUT
OUT
OUT
OUT
OUT(BOOST)
≤ 24V, I
≤ 14V, I
≤ 24V, I
≤ 10V, I
≤ 10V, I
≤ 24V, I
R
R
10μF
50V
SENSE1
5mΩ
SENSE2
5mΩ
38582 TA07
Q
Q
Q
Q
Q
Q
Up to 60V, I
V
19V TO 28V
= 50μA,
IN
= 170μA
= 50μA,
= 30μA,
= 80μA,
= 50μA,
© LINEAR TECHNOLOGY CORPORATION 2010
10μF
16V
C
22μF
16V
C
22μF
16V
OUT1
OUT2
Q
= 55μA,
LT 1110 • PRINTED IN USA
V
12V
12.5A
10μF
16V
OUT
IN
≤ 60V,
IN
≤ 38V,
38582f