Datasheet

17
LTC1149
LTC1149-3.3/LTC1149-5
Figure 12. Ultra Wide Input Range (5.5V to 25V) High Efficiency 5V Regulator
TYPICAL APPLICATIO S
U
PGATE
V
IN

V
CC

PDRIVE
V
CC

C
T

I
TH

SENSE
–
CAP
SHDN2
RGND
NGATE
PGND
S-GND
SHDN1
SENSE
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9

LTC1149-5
0.068µF
0.047µF
1N4148 1N4148
3300pF
1k
220pF1µF
1000pF
Si9410DY 1N5818
220µF
35V
V
IN

5.5V TO 25V
L*
33µH
R
SENSE
**
0.05Ω
220µF
10V × 2
AVX
1149 F12
V
OUT

5V/2A
*COILTRONICS CTX33-4 Kool Mµ
**KRL SL-1-C1-0R050J
Si9435DY
SHUTDOWN
+
+
+
Figure 13. 250kHz High Efficiency 12V Input 5V/2A Output Regulator
PGATE
V
IN

V
CC

PDRIVE
V
CC

C
T

I
TH

SENSE
–
CAP
SHDN2
RGND
NGATE
PGND
SGND
SHDN1
SENSE
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9

LTC1149-5
0.068µF
0.047µF
1N4148 1N4148
3300pF
1k
180pF1µF
1000pF
Si9410DY 1N5818
100µF
25V
V
IN

8V TO 16V
L*
22µH
R
SENSE
**
0.05Ω
220µF
10V
AVX
1149 F13
V
OUT

5V/2A
*DALE LPE-6562-220MB
**KRL SL-1-C1-0R050J
Si9430DY
SHUTDOWN
+
+
+