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LT1533CS Datenblatt(PDF) 17 Page - Linear Technology

Teilenummer LT1533CS
Bauteilbeschribung  Ultralow Noise 1A Switching Regulator
PDF  20 Pages
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Hersteller  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1533CS Datenblatt(HTML) 17 Page - Linear Technology

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LT1533
TYPICAL APPLICATIONS
A 50V Output Low Noise Regulator. Cascoded Bipolar Transistors
Accommodate 60V Transformer Swings, Permitting 24V (20VIN to 30VIN)
Powered Operation. See AN70 for Details
Hysteretic Loop Lowers Quiescent Current to 100
µA While
Maintaining Low Output Noise. See AN70 for Details
SHDN
DUTY
SYNC
COL A
COL B
PGND
RVSL
RCSL
FB
NFB
LT1533
GND
VIN
2.7V TO 4V
(3 Ni-Cd BATTERIES)
14
2
15
16
13
12
7
11
3
4
5
6
10
3300pF
18k
0.01
µF
10pF
5V
15k
L2
4.7
µF
15k
+
T1
L1
100
µH
L3
100
µH
8
9
21.5k
1%
2.32k
1%
150k
1.18V
VZ INTERNAL
TO LTC1440
47
µF
+
47
µF
12V
1N4148
1N4148
L1, L3: COILTRONICS CTX100-3
L2: 22nH TRACE INDUCTANCE, FERRITE BEAD OR
INDUCTOR COILCRAFT B-07T TYPICAL
T1: CTX02-13665-X1
1553 TA05
+
CT
RT
VC
OPTIONAL FOR
LOWEST RIPPLE
()
C1
LTC1440
SHDN
DUTY
SYNC
COL A
COL B
PGND
RVSL
RCSL
NFB
LT1533
GND
VIN
24V
(20V TO 30V)
14
2
15
16
13
12
11
3
4
5
6
10
3300pF
18k
0.01
µF
15k
3.3k
3.3k
L2
1
µF
Q3
1N4148
68
Ω
15k
+
T1
L1
100
µH
50V
100
µH
8
7
9
97.6k
1%
+
+
47
µF
47
µF
MUR110
MUR110
L1: COILTRONICS CTX100-3
L2: 22nH TRACE INDUCTANCE, FERRITE BEAD OR
INDUCTOR COILCRAFT B-07T TYPICAL
Q1, Q2: ZETEX ZTX-853
Q3: 2N2222A
T1: CTX02-13665-X1
1553 TA06
47
µF
CT
RT
VC
OPTIONAL FOR
LOWEST RIPPLE
()
360
Ω
+
360
Ω
68
Ω
2.49k
1%
10k
1N752
5.6V
Q1
0.003
µF
0.003
µF
Q2
FB



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