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LTC1263CS8 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC1263CS8
Description  12V, 60mA Flash Memory Programming Supply
PDF  8 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1263CS8 Datasheet(HTML) 4 Page - Linear Technology

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LTC1263
BLOCK DIAGRAM
C1+
C1–
C1
C2+
C2–
C2
S4B
S4A
S3A
S3C
S1
R1
R2
R3
BANDGAP
REFERENCE
OSCILLATOR
VCC
VOUT
CIN
COUT
SHDN
GND
CHARGE PUMP
S4C
S3D
S3B
LTC1263 • BD
VBGAP
S1 AND S2 SHOWN WITH SHDN PIN LOW. S3A, S3B, S3C, S3D, S4A, S4B AND S4C SHOWN CHARGING C1 AND C2
WITH OSCILLATOR OUTPUT LOW AND VDIV < VBGAP – VHYST. AT OSCILLATOR OUTPUT HIGH, S3A, S3B, S3C AND S3D
OPEN WHILE S4A, S4B AND S4C CLOSE TO CHARGE VOUT. COMPARATOR HYSTERESIS IS ±VHYST
S2
VDIV
CLK
TIMING DIAGRAMS
1.4V
1.4V
VSHDN
VOUT
5.1V
12V
tON
tOFF
VOUT
VCC
VCC
0V
LTC1263 • F01
Figure 1. Timing Diagram
1
2
3
4
8
7
6
5
SHDN
GND
VOUT
VCC
C1–
C1+
C2–
C2+
LTC1263
C1 = 0.47
µF
C2 = 0.47
µF
LTC1263 • F02
C3 = 10
µF
C4 = 10
µF
VCC
4.75V TO 5.5V
VSHDN
VOUT
Figure 2. Timing Circuit



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