LTC3707 Datasheet, PDF (30/32 Pages) Linear Technology – High Effi ciency, 2-Phase Synchronous Step-Down Switching Regulator

LTC3707
TYPICAL APPLICATION
59k
1M
0.1μF
180pF
20k
1%
33pF
15k
33pF
15k
20k
1%
180pF
1
RUN/SS1
28
PGOOD
105k, 1%
1000pF
2 _SENSE1+
3 _SENSE1–
27
TG1
26
SW1
INTV_CC
0.01μF
4
V_OSENSE1
5
FREQSET
6
STBYMD
25
BOOST1
24
V_IN
23
BG1
7
FCB
8
I_TH1
22
EXTV_CC
LTC3707
21
INTV_CC
1000pF ₉
SGND
20
PGND
63.4k
1%
10
3.3V
3.3V_OUT
11
I_TH2
1000pF ₁₂
V_OSENSE2
1000pF
13 _SENSE2–
14 _SENSE2+
19
BG2
18
BOOST2
17
SW2
16
TG2
15
RUN/SS2
100k _VPULL-UP
(<7V)
PGOOD
0.1μF
CMDSH-3TR
1μF
10V
4.7μF
CMDSH-3TR
0.1μF
MBRS1100T3
T1, 1:1.8
10μH
+
0.015Ω
M1
M2
D1
MBRM
140T3
10Ω
0.1μF
150μF, 6.3V
22μF ^{PANASONIC SP}
50V
33μF
25V
8
LT1121
V_OUT1
5V
3A; 4A PEAK
5
ON/OFF
32
1
220k
V_OUT3
12V
120mA
+
100k
1μF
25V
GND
180μF, 4V
PANASONIC SP
V_IN
7V TO
28V
M3
M4
D2
MBRM
140T3
L1
6.3μH
0.01Ω
V_OUT2
3.3V
5A; 6A PEAK
0.1μF
V_IN: 7V TO 28V
V_OUT: 5V, 3A/3.3V, 6A/12V, 120mA
SWITCHING FREQUENCY = 300kHz
MI, M2, M3, M4: NDS8410A
L1: SUMIDA CEP123-6R3MC
T1: 10mH 1:1.8 — DALE LPE6562-A262 GAPPED E-CORE OR BH ELECTRONICS #501-0657 GAPPED TOROID
1628 F12
Figure 12. LTC3707 High Efficiency Low Noise 5V/3A, 3.3V/5A, 12/120mA Regulator
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