LTC1262 데이터 시트보기 (PDF) - Linear Technology
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LTC1262 Datasheet PDF : 8 Pages
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LTC1262
BLOCK DIAGRAM
C1+
C1
C1–
C2+
C2
C2–
S3A
S4A
S3B
S3C
D2
S4B
S3D
CHARGE
PUMP
D1 S1
BANDGAP
VBGAP REFERENCE
OSCILLATOR
S1 AND S2 SHOWN WITH SHDN PIN LOW.
S3A, S3B, S3C, S3D, S4A AND S4B SHOWN WITH OSCILLATOR OUTPUT LOW AND VDIV < VBGAP – VHYST.
COMPARATOR HYSTERISIS IS ±VHYST.
VCC
+
CIN
R1
SHDN
VOUT
+
R2
COUT
VDIV
R3
S2
GND
LTC1262 • BD
WU
W
TI I G DIAGRA S
VOUT
t OFF
5.1V
VSHDN
1.4V
t ON
VOUT
11.4V
VCC
VCC
1.4V
0V
LTC1262 • F01
Figure 1. LTC1262 Timing Diagram
C1
0.22µF
C2
0.22µF
1 C1–
8
SHDN VSHUTDOWN
2 C1+
7
GND
LTC1262
+
3 C2–
6
VOUT
4 C2+
5
VCC
COUT
4.7µF
+
CIN
4.7µF
VOUT
VCC
4.75V TO 5V
LTC1262 • F02
Figure 2. LTC1262 Timing Circuit
4
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