LTC1439 Linear Technology, LTC1439 Datasheet - Page 26

• Manufacturer Part Number: LTC1439
• Description: Dual High Efficiency/ Low Noise/ Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC1438/LTC1439
26
TYPICAL APPLICATIONS
R
10k
R
10k
LP
C1
0.1 F
100pF
110k, 1%
220pF
C
0.1 F
C
C1A
SS1
C
470pF
C2A
1000pF
1000pF
0.01 F
10k
R
C
C
LP
C1
C
390k, 1%
C
56pF
OSC
1000pF
1000pF
POR2
C
LBO
C2
LTC1439 High Efficiency Low Noise 5V/3A, 3.3V/3.5A and 12V/200mA Regulator
1000pF
C
0.1 F
100k
100k
SS2
INTV
CC
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
U
RUN/SS1
SENSE
SENSE
V
I
POR2
C
SGND
LBI
LBO
SFB1
I
V
V
SENSE
SENSE
RUN/SS2
AUXDR
TH1
TH2
PROG1
OSC
PROG2
OSENSE2
LTC1439
+
+
–
–
2
1
1
2
BOOST 1
BOOST 2
PLL LPF
EXTV
INTV
AUXON
AUXFB
PLLIN
PGND
TGL1
TGS1
TGS2
TGL2
SW1
SW2
BG1
BG2
V
CC
CC
IN
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
AUX ON/OFF
CLOCK
EXT
+
0.1 F
D4
CMDSH-3
D2
CMDSH-3
0.1 F
4.7 F 16V
+
V
M3
M6
OUT1
CIN1
22 F
35V
2
M1
M2
M5
M4
10 H
1:1.8
10 H
T1*
L2
D1
MBRS140T3
D3
MBRS140T3
MBRS1100T3
R
0.03
SENSE1
* T1 = DALE LPE-6562-A262 GAPPED E-CORE
M1, M2, M4, M5 = IRF7403
M3, M6 = IRLML2803
L2 = SUMIDA CDRH125-100MC
ALL INPUT OUTPUT CAPACITORS ARE AVX-TPS SERIES
3.3 F
25V
+
BH ELECTRONICS 501-0657 GAPPED TOROID
+
+
R
0.03
SENSE2
C
100 F
10V 2
OUT2
C
100 F
10V
OUT1
V
5V/3A
2
OUT1
+
4.7 F
25V
V
3.3V
3.5A
OUT2
47k
C
22 F
35V
+
IN2
2
MMBT
2907
V
12V
200mA
OUT2
6V TO 28V
R6
1M
1%
R5
90.9k
1%
1438 TA02
V
IN