LT1372 Linear Technology, LT1372 Datasheet - Page 11

• Manufacturer Part Number: LT1372
• Description: 500kHz and 1MHz High Efficiency 1.5A Switching Regulators
• Manufacturer: Linear Technology

0.0047 F
22 F
10V
TYPICAL APPLICATIONS
V
OFF
5V
C1
IN
C3
**
ON
+
+
*
†
Positive-to-Negative Converter with Direct Feedback
SUMIDA CLS62-100L
MOTOROLA MBR0520LT3
PATENTS MAY APPLY
4
C1
22 F
S/S
5
4
7
6
Low Ripple 5V to – 3V “Cuk”
LT1372/LT1377
V
0.0047 F
2.7V TO 16V
C
1
V
S/S
GND
GND S
R1
2k
IN
LT1372/LT1377
C2
0.047 F
V
V
IN
IN
C5
5
GND
V
NFB
SW
6, 7
V
NFB
SW
V
8
3
C
*COILTRONICS CTX10-2 [phone]
†
MAX I
0.75A
8
3
1
I
0.3A
0.5A
OUT
D2
P6KE-15A
D3
1N4148
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of circuits as described herein will not infringe on existing patent rights.
R4
2k
2
1
+
OUT
C4
0.047 F
D1**
•
47 F
16V
V
3V
5V
9V
L1*
C2
MBRS130LT3
IN
•
U
3
4
2
1
•
†
T1*
Converter
D1
•
4
3
N
R1
1k
1%
R2
4.99k
1%
+
+
R2
2.49k
1%
R3
2.49k
1%
C3
47 F
16V
C4
47 F
LT1372 • TA03
LT1372 • TA05
–V
–5V
C6
0.1 F
V
–3V
250mA
OUT
OUT
†
0.0047 F
2.7V TO
Q1, Q2 = ZETEX ZTX849 OR ROHM 2SC5001
DO NOT SUBSTITUTE COMPONENTS
OFF
COILTRONICS [phone]
COILCRAFT [phone]
TO 30V
OFF
+
4.5V
5.5V
C1 = WIMA MKP-20
L1 = COILCRAFT DT3316-333
T1 = COILTRONICS CTX 110609
V
Dual Output Flyback Converter with Overvoltage Protection
C3
* = 1% FILM RESISTOR
IN
ON
ON
1.21k
C1
22 F
1%
+
R2
+
4
4
S/S
2.2 F
10 F
LT1372/LT1377
V
FB
S/S
C
GND
1
2
LT1372/LT1377
R3
2k
6, 7
C2
0.047 F
2.7V TO 13V
V
IN
*DALE LPE-4841-100MB [phone]
90% Efficient CCFL Supply
5
5
GND
330
V
V
V
+
NFB
27pF
IN
IN
SW
V
6, 7
5
1N5818
V
C2
V
C
SW
1
FB
8
3
2 F
4
8
2
CCFL BACKLIGHT APPLICATION CIRCUITS
CONTAINED IN THIS DATA SHEET ARE
COVERED BY U.S. PATENT NUMBER 5408162
AND OTHER PATENTS PENDING
1N4148
Q1
OPTIONAL REMOTE
P6KE-20A
3
13k
1%
R1
10
LT1372/LT1377
DIMMING
5mA MAX
0.1 F
LAMP
2, 3
6, 7
C1
2
22k
•
1N4148
T1*
L1
33 H
MBRS140T3
•
•
MBRS140T3
Q2
562 *
5
4
8
1
1
20k
DIMMING
T1
+
+
10k
R4
12.1k
1%
R5
2.49k
1%
D2
1N4148
11
0.1 F
C4
47 F
C5
47 F
LT1372 • TA06
D1
1N4148
LT1372 • TA04
V
15V
–V
–15V
OUT
OUT