LTC3826 Linear Technology, LTC3826 Datasheet - Page 32

• Manufacturer Part Number: LTC3826
• Description: 2-Phase Synchronous Step-Down Controller
• Manufacturer: Linear Technology

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LTC3826
TYPICAL APPLICATIONS
32
100
0.000001
90
80
70
60
50
40
30
20
10
0
0.01μF
0.01μF
330pF
C
470pF
C
C
C
Effi ciency vs Output Current
SS1
ITH2
ITH1
SS2
0.00001 0.0001 0.001 0.01
V
V
C
C
68pF
OUT
OUT
100pF
ITH2A
ITH1A
OUTPUT CURRENT (A)
= 5V
= 9.5V
39.2k
R
24.2k
69.8k
R
R
105k
R
ITH1
A2
ITH2
A1
R
365k
R
432k
B2
B1
22pF
39pF
C1
1nF
C2
1nF
0.1
1
3827 F14a
I
V
SENSE1
SENSE1
PLLLPF
PHASMD
CLKOUT
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
SENSE2
V
I
TRACK/SS2
TH1
TH2
FB1
FB2
10
High Effi ciency Dual 5V/9.5V Step-Down Converter
LTC3826
+
–
–
+
TRACK/SS1
FOLDDIS
PGOOD2
PGOOD1
BOOST1
BOOST2
EXTV
INTV
MTOP1, MTOP2, MBOT1, MBOT2: Si7848DP
L1: CDEP105-3R2M
L2: CDEP105-7R2M
C
PGND
OUT1
SW1
SW2
BG1
BG2
TG1
TG2
V
CC
CC
IN
, C
OUT2
= SANYO 10TPD150M
Start-Up
100k
D2
D1
C
0.47μF
V
V
C
4.7μF
B1
OUT2
OUT1
C
INT2
100k
B2
0.47μF
, 2V/DIV
, 2V/DIV
3826 F14b
5V/DIV
5V/DIV
SW1
SW2
MTOP1
MBOT1
MTOP2
MBOT2
3.3μH
7.2μH
L1
L2
10μF
C
IN1
SW Node Waveform
R
12mΩ
SNS2
R
12mΩ
3826 TA03
SNS1
10μF
C
IN2
C
150μF
OUT1
C
150μF
OUT2
V
V
12V
V
9.5V
OUT2
OUT1
3826 F14c
5V
5A
IN
3A
3826fc