LTC3727LX-1_15 Datasheet, PDF (28/28 Pages) Linear Technology – High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

LTC3727LX-1
TYPICAL APPLICATIO
C_OUT1: PANASONIC EEFCDOJ470R
C_OUT2: SANYO OS-CON 16SVP100M
V_IN: 10V TO 15V
V_OUT: 5V, 5A/8.5V, 3A
SWITCHING FREQUENCY = 250kHz
MI, M2: FAIRCHILD FDS6680A
L1, L2: 8µH SUMIDA CDEP134-8R0
0.1µF
27pF
105k ^1000pF
20k
1%
1%
33pF
15k _220pF
33pF
3.3V
15k _220pF
20k
1% 192.5k, 1%
0.1µF
27pF ^1000pF
1 _RUN/SS1
2 _SENSE1+
PGOOD 28
TG1 ²⁷
3 _SENSE1–
26
SW1
4
V_OSENSE1
5
PLLFLTR
6
PLLIN
25
BOOST1
24
V_IN
23
BG1
7
FCB
EXTV_CC ²²
8
LTC3727LX-1
I_TH1
INTV_CC
21
9
SGND
10
3.3V_OUT
11
I_TH2
12
V_OSENSE2
13 _SENSE2–
20
PGND
19
BG2
18
BOOST2
17
SW2
16
TG2
14 _SENSE2+
15
RUN/SS2
V_PULL-UP
(<7V)
PGOOD
0.1µF
M1A
CMDSH-3
1µF
10V
4.7µF
CMDSH-3
10Ω
0.1µF
0.1µF
M2A
Figure 13. LTC3727LX-1 8.5V/3A, 5V/5A Regulator
L1
8µH
0.015Ω
M1B
22µF
50V
D1
MBRM
140T3
C_OUT1
47µF, 6.3V
V_OUT1
5V
5A; 6A PEAK
GND
C_OUT2 100µF 16V
D2
MBRM
M2B
140T3
L2
0.015Ω
8µH
V_IN
10V TO 15V
V_OUT2
8.5V
3A; 4A PEAK
3727LX1 F13
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80µA Quiescent Current 4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 10V
PolyPhase is a registered trademark of Linear Technology Corporation. No R_SENSE is a trademark of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
3727lx1fa
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT 0107 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2006