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LT1776CS8 Datasheet(PDF) 17 Page - Linear Technology

Part # LT1776CS8
Description  Wide Input Range, High Efficiency, Step-Down Switching Regulator
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1776CS8 Datasheet(HTML) 17 Page - Linear Technology

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17
LT1776
TYPICAL APPLICATIONS
(a)
VIN
C1
NC
Q1
PN2484
Q2
2N2369
1776 F07a
V +
V –
IN +
IN –
U2
LTC1440
REF
HYST
OUT
3
7
1
2
4
6
5
8
GND
+
C2
+
D1
R1
39k
5%
VOUT
5V
R2
10k
5%
R5
22k
R6
2.4M
L1
R3
323k
1%
R4
100k
1%
C3
100pF
R7
10M
C1: PANASONIC HFQ 39
µF AT 63V
C2: AVX D CASE 100
µF 10V
TPSD107M010R0080
D1: MOTOROLA 100V, 1A,
SMD SCHOTTKY
MBRS1100 (T3)
L1: COILCRAFT DO3316-104
VIN
VCC
VSW
U1
LT1776
FB
VC
SHDN
SYNC
2
5
4
3
7
8
6
1
GND
Figure 7. Burst Mode Operation Configuration for High Efficiency at Light Load
(b)
LOAD CURRENT (mA)
1
60
70
80
90
10
100
1000
1776 F07b
50
40
30
20
VIN = 10V
VIN = 30V
VIN = 40V
VIN = 20V



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