LT1572CS Просмотр технического описания (PDF) - Linear Technology
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LT1572CS Datasheet PDF : 12 Pages
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TYPICAL APPLICATI S
Negative Buck Converter
LT1572
* REQUIRED IF INPUT LEADS ≥ 2"
** PULSE ENGINEERING 92114
COILTRONICS 50-2-52
+
C3*
100µF
VIN
–7V TO –20V
CATHODE
VIN
VSW
E1
LT1572 ANODE
E2
GND
FB
VC
C1
R3
L1**
50µH
R2
1.24k
C2
200µF
R1
4.64k
R4
Q1
12k
2N3906
LOAD
–5.2V
0.75A
1572 TA03
INPUT VOLTAGE†
4.5V TO 20V
10µF +
TANT
Backlight CCFL Supply (see AN55 for details)
1k
CATHODE
E2
VIN
VSW
LT1572 ANODE
E1
GND
FB
VC
+
2µF
L2***
L1**
300µH
A
Q1*
33pF
3kV
LAMP
0.02µF
Q2*
B
D1
1N914
R3
10k
D2
1N914
R1
560Ω
50k
INTENSITY
ADJUST
C6
* Q1,Q2 = BCP56 OR MPS650/561
1µF
** COILTRONICS CTX300-4
*** SUMIDA 6345-020 OR COILTRONICS 110092-1
† A MODIFICATION WILL ALLOW OPERATION DOWN TO 4.5V. CONSULT FACTORY.
1572 TA04
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 its circuits as described herein will not infringe on existing patent rights.
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