LTC1625 Datasheet, PDF (22/24 Pages) Linear Technology – No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator

LTC1625
TYPICAL APPLICATIONS
– 5V/4.5A Positive to Negative Converter
C_C1
2.2nF ^RC
C_SS
10k 0.1µF
C_C2
220pF
1
EXTV_CC
16
V_IN
2
SYNC
3
RUN/SS
15
TK
14
SW
4
LTC1625
13
FCB
TG
5
I_TH
12
BOOST
6
SGND
7
V_OSENSE
11
INTV_CC
10
BG
8
V_PROG
9
PGND
R_F
4.7Ω
C_F
0.1µF
V_IN
5V TO 10V
M1
FDS6670A
L1
+ CIN
220µF
16V
C_B
6µH
0.22µF
D_B
CMDSH-3
+ _CVCC
4.7µF
D₁
MBR140T3
M2
FDS6670A
+ COUT
470µF
6.3V
V_OUT
–5V
4.5A
C_IN: SANYO 16SV220M
C_OUT: SANYO 6SV470M
L1: MAGNETICS Kool-Mµ 77120-A7, 9 TURNS, 17 GAUGE
1625TA08
Single Inductor, Positive Output Buck Boost
C_SS
0.1µF
R_C
10k
C_C1
2.2nF
C_C2
220pF
R1
3.92k
R2
35.7k
1
EXTV_CC
2
SYNC
3
RUN/SS
16
V_IN
15
TK
14
SW
4
13
FCB
TG
LTC1625
5
I_TH
12
BOOST
6
SGND
7
V_OSENSE
11
INTV_CC
10
BG
8
V_PROG
9
PGND
R_F
4.7Ω
C_F
0.1µF
V_IN
6V TO 18V
+
M1
Si4420DY
C_IN
68µF
20V
x2
C_B
0.33µF
D_B
CMDSH-3
+ _CVCC
4.7µF
M2
Si4420DY
D1
MBRS
340T3
R1
100k
Z1
MMBZ
5240
10V
D4
BAT85
V_IN
I_OUT
18
4.0
12
3.3
6
2.0
L1
18µH
D2
MBRS340T3
C1
470pF
M4
Si4425DY
D3
BAT85
+
8
1
7
2
1/2
LTC1693-2
M3
Si4420DY
V_OUT
12V
C_OUT
100µF
16V
30mΩ
x2
3
4
5
6 ^1/2
LTC1693-2
C2
0.1µF
D5
BAT85
C_IN: SANYO 20S68M
C_OUT: SANYO 16SA100M
L1: 7A, 18µH Kool-Mµ 77120-A7, 15 TURNS, 17 GAUGE
1625TA09
22