S-882Z Seiko Instruments, S-882Z Datasheet - Page 12

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S-882Z

Manufacturer Part Number
S-882Z
Description
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
Manufacturer
Seiko Instruments
Datasheet

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12
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
S-882Z Series
Example of Connection with Step-up DC-DC Converter
1. V
2. V
The following are the connection examples based on the set condition.
The symbols used in the connection diagram are described in Table 7 below.
OUT
OUT
SD2, R
≤ 3.0 V, C
≤ 3.0 V, C
V
V
C
C
Symbol
R
IN
IN
IN
IN
C
SD1
1
VDD
, R
OUT
2
VIN
VIN
L
L
≤ C
> C
CPOUT
CPOUT
A Schottky diode for preventing a voltage decline in the VDD pin due to output capacitor C
step-up DC-DC converter startup.
The power smoothing capacitor of the step-up DC-DC converter. Set the capacitance value so
that C
A Schottky diode and pull-down resistor to prevent the OUT pin voltage of the S-882Z Series
from exceeding the absolute maximum rated voltage.
Bleeder resistors to prevent the VM pin voltage of the S-882Z Series from exceeding the
absolute maximum rated voltage.
S-882Z Series
S-882Z Series
CPOUT
CPOUT
VSS
VSS
VDD
× 0.1, no load
× 0.1
≤ C
CPOUT
C
C
CPOUT
CPOUT
OUT
VM
OUT
VM
× 0.1.
Seiko Instruments Inc.
Figure 16
Figure 17
VIN
VIN
Table 7
C
Step-up DC-DC converter
Step-up DC-DC converter
VDD
Description
VSS
VSS
VDD
VDD
SD1
OUT
OUT
Rev.1.2
C
C
V
V
L
L
OUT
OUT
L
_00
at
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