LTC3828 Datasheet, PDF (30/32 Pages) Linear Technology – Dual 2-Phase Step-Down Controller with Tracking

LTC3828
APPLICATIO S I FOR ATIO
0.1µF
33pF
1000pF
15k
R1
R2
20k 1% 17.4k 1%
180pF
500kHz
fIN
30k 26.1k
33pF
1000pF
4.7k
R3
R4
20k 1% 63.4k 1%
180pF
1
TRCKSS1
28
CLKOUT
2
I_TH1
27
PGOOD
3
LTC3828EG
SENSE1⁺
BOOST1
26
4 _SENSE1–
25
TG1
5
V_OSENSE1
6
PLLFLTR
7
RUN1
8
FCB/PLLIN
24
SW1
23
V_IN
22
INTV_CC
21
PGND
9
SGND
20
BG1
10
TRCKSS2
19
BG2
11 _SENSE2–
18
SW2
12 _SENSE2+
17
TG2
13
I_TH2
14
V_OSENSE2
16
BOOST2
15
RUN2
10Ω
2nF
10Ω
R_{PU VPULL_UP}
<5.5V
PGOOD
L1
0.68µH
R_SENSE1
6mΩ
V_OUT1
1.5V
7A
C_B1
0.22µF
M1
M2
D1
1µF
CERAMIC
R_IN
10Ω
C_OUT1
1µF
C_VIN
C_IN
330µF 2.5V
0.1µF 22µF 16V
C_INTVCC
4.7µF
1µF
CERAMIC
V_IN
12V
C_OUT2
220µF 4V
C_B2
0.22µF
10Ω
2nF
10Ω
M3
M4
D2
L2
R_SENSE2
1µH
6mΩ
3828 F14
V_OUT2
3.3V
7A
Figure 15. LTC3828 High Efficiency Low Noise 1.5V/7A,
3.3V/7A, 500kHz Regulator with Ratiometric Tracking
3828f
30