CS4121 Cherry Semiconductor Corporation, CS4121 Datasheet - Page 6

• Manufacturer Part Number: CS4121
• Description: Low Voltage Precision Air-Core Low Voltage Precision Air-Core
• Manufacturer: Cherry Semiconductor Corporation

Figure 5A: Partial Schematic of Input and Charge Pump
Figure 5B: Timing Diagram of FREQ
FREQ
FREQ
SQ
OUT
IN
V
IN
I
CP+
CP+
IN
0
0
and I
0
Circuit Description and Application Notes: continued
2.0V
+
Ð
CP
SQ
V
V
OUT
REG
R3
CC
V
REG
Q
SQUARE
+ Ð
C
V
T
PW
C
(t)
R4
6
CP+
T
0.25V
Q1
T-PW
Q3
Q2
CPÐ
2.0V
+
Ð
R
C4
T
F/V
OUT
F to V