lt3742 Linear Technology Corporation, lt3742 Datasheet - Page 22

• Manufacturer Part Number: lt3742
• Description: Dual, 2-phase Step-down Switching Controller
• Manufacturer: Linear Technology Corporation

LT3742
TYPICAL APPLICATIONS
22
V
C
D1, D2: DIODES INC. PDS1040
L1, L2: NEC/TOKIN PLC12458R2
M1, M2: ROHM RSS065N03
OUT1
OUTA
12V
8A
-C
OUTD
24V
V
V
: KEMET T495E107K020E060
IN
IN
R1
2.8k
R2
200Ω
C1
10μF
High Current, Low Ripple 12V Step-Down Converter
0.010Ω
R
S1
C7
1nF
680pF
100
70
90
85
60
C
C1
0
8.2μH
12V
L1
C5
1μF
D1
M1
1
OUT
C
100μF
20V
R
51k
OUTA
C1
R7
124k
R8
20.0k
2
PG1
Effi ciency vs Load Currnt
LOAD CURRENT (A)
3
UVLO
G1
SW1
SENSE1
SENSE1
PG1
FB1
RUN/SS1
V
V
C1
IN
C
100μF
20V
4
OUTB
L3 10μH
+
–
5
LT3742
GND
SWB
6
RUN/SS2
SENSE2
SENSE2
C
100μF
20V
OUTC
BIAS
SW2
PG2
3742 TA04b
FB2
V
7
G2
C2
+
–
C6
4.7μF
8
PG2
C
100μF
20V
OUTD
M2
8.2μH
D2
L2
0.010Ω
R
S2
C3
10μF
V
IN
3742 TA04a
3742f