ltc1143l-adj Linear Technology Corporation, ltc1143l-adj Datasheet - Page 20

• Manufacturer Part Number: ltc1143l-adj
• Description: Dual High Efficiency So-16 Step-down Switching Regulator Controllers
• Manufacturer: Linear Technology Corporation

3.3V/3A
LTC1143/LTC1143L
LTC1143L-ADJ
TYPICAL
RELATED PARTS
PART NUMBER
LTC1142
LTC1142L-ADJ
LTC1142HV-ADJ Dual High Efficiency Synchronous Step-Down Switching Regulator
LTC1147L
LTC1265
LTC1438
LTC1538-AUX
LTC1539
Adaptive Power is a trademark of Linear Technology Corporation.
20
V
OUT3
C
C
L1: COILTRONICS CTX10-4
L2: COILTRONICS CTX25-4
IN3
OUT3
, C
R
0.033
+
, C
SENSE3
IN5
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
C
220 F
10V
OUT5
OUT3
: AVX TPSD226K025R0200
3
: AVX TPSE227M010R0080
APPLICATION
High Efficiency Step-Down Switching Regulator Controller
Dual Synchronous Controller with Auxiliary Linear Regulator
DESCRIPTION
Dual High Efficiency Synchronous Step-Down Switching Regulator
Dual High Efficiency Synchronous Step-Down Switching Regulator
1.2A, High Efficiency Step-Down DC/DC Converter
Dual Synchronous Controller with Power-On Reset and
an Extra Comparator
Controller and 5V Standby
Dual Synchronous Controller with Phase-Locked Loop
and Adaptive Power
10 H
22 F
L1
C
25V
MBRD340
IN3
3
D1
+
P1
TM
0.01 F
Operation
Figure 13. All Surface Mount Dual 5V/2A, 3.3V/3A Converter
16
4
U
1
SENSE
P-DRIVE 3
SENSE
GND3
V
IN3
P1: SILICONIX Si4431DY
P2: SILICONIX Si9435DY
R
R
3
13
SENSE3
SENSE5
+
–
+
3
3
C
T3
: KRL SL-1/2-C1-0R033J
: KRL SL-1/2-C1-0R050J
14
0.22 F
SHUTDOWN 3
C
200pF
T3
2
I
>1.5V = SHUTDOWN
TH3
15
5.2V TO 14V
0V = NORMAL
R
510
C3
C
3300pF
LTC1143
C3
V
IN
I
TH5
SHUTDOWN 5
7
R
1k
C5
C
3300pF
C5
10
0.22 F
C
Synchronous Equivalent to LTC1143, 4V < V
Synchronous Equivalent to LTC1143L-ADJ, 3.5V < V
4V < V
(1/2) LTC1143L-ADJ in SO-8
Single Channel with Internal Switch
Constant Frequency Current Mode, Drives Synchronous
N-Channel MOSFETS
Up to Four Output Voltages from G28 Package
Full Featured Dual Controller in G36 Package
T5
6
P-DRIVE 5
COMMENTS
SENSE
SENSE
C
220pF
T5
+
IN
V
GND5
IN5
< 20V
+
–
5
11
5
5
9
8
12
0.01 F
P2
1143fa LT/TP 0598 REV A 2K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1994
D2
MBRD340
+
C
22 F
25V
IN5
2
25 H
L2
IN
R
< 16V
0.05
SENSE5
+
IN
LTC1143.F13
< 16V
C
220 F
10V
V
5V/2A
OUT5
OUT5
2