LTC1148HV Linear Technology, LTC1148HV Datasheet - Page 20

• Manufacturer Part Number: LTC1148HV
• Description: High Efficiency Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC1148
LTC1148-3.3/LTC1148-5
TYPICAL
RELATED PARTS
20
PART NUMBER
LTC1142
LTC1143
LTC1147
LTC1149
LTC1159
LTC1174
LTC1265
LTC1435A
LTC1538-AUX
Figure 18. All N-Channel 5V/8A High Efficiency Regulator
(Burst Mode Operation Suppressed)
C
820pF
T
+
R
510
C
C
3300pF
1 F
C
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
**DALE LVR-3-0.01
*COILTRONICS CTX33-10-KM
1
2
3
4
5
6
7
APPLICATION
P-DRIVE
NC
V
C
INTV
I
SENSE
TH
DESCRIPTION
Dual High Efficiency Synchronous Step-Down Switching Regulator
Dual High Efficiency Step-Down Switching Regulator Controller
High Efficiency Step-Down Switching Regulator Controller
High Efficiency Synchronous Step-Down Switching Regulator
High Efficiency Synchronous Step-Down Switching Regulator
High Efficiency Step-Down and Inverting DC/DC Converter
1.2A, High Efficiency Step-Down DC/DC Converter
High Efficiency Low Noise Synchronous Step-Down Switching Regulator
Dual High Efficiency, Low Noise, Synchronous Step-Down
Switching Regulator
IN
T
LTC1148HV-5
CC
–
SHUTDOWN
N-DRIVE
SENSE
PGND
SGND
2N3906
20k
NC
NC
+
14
13
12
11
10
9
8
VN2222LL
MUR110
220
SHUTDOWN
22k
U
2N2222
1000pF
100
100
33 H
220
*L
N-CH
IRFZ44
R
0.01
SENSE
**
1N5818
IRFZ44
1N4148
+
470nF
N-CH
D1
10V TO 18V
LTC1148 • F18
C
2200 F
16V
+
OUT
V
3
IN
C
2700 F
35V
V
5V/8A
IN
2
OUT
For additional high efficiency application
circuits, see Application Notes 54, 58 and 66
Figure 19. All N-Channel 5V/8A Efficiency
100
COMMENTS
Dual LTC1148
Nonsynchronous Dual Output
Nonsynchronous Equivalent to LTC1148, 8-Pin
V
V
Nonsynchronous 8-Pin Internal Switch
Nonsynchronous Internal Switch
Synchronous N-Channel, Constant Frequency
Auxiliary Linear Regulator, 5V Standby in Shutdown
90
80
70
60
IN
IN
0.1
< 48V, Standard Threshold MOSFETs
< 40V, Logic Level MOSFETs
V
IN
= 10V
LOAD CURRENT (A)
114835fc LT/GP 1098 2K REV C • PRINTED IN USA
V
IN
1
= 14V
LINEAR TECHNOLOGY CORPORATION 1993
LTC1148 • F19
10