S-8330A22FS-T2-G Seiko Instruments, S-8330A22FS-T2-G Datasheet - Page 19

• Manufacturer Part Number: S-8330A22FS-T2-G
• Description: IC REG SW PWM SHTDN 10-22V 8SSOP
• Manufacturer: Seiko Instruments
• Type: Step-Up (Boost)r

Specifications of S-8330A22FS-T2-G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 10 ~ 22 V
• Current - Output: 5mA
• Frequency - Switching: 180kHz
• Voltage - Input: 2 ~ 9 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SSOP
• Power - Output: 300mW
• Output Voltage: 22 V
• Operating Temperature Range: - 20 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Rev.6.0
Recommended Selection of Series Products and External Parts
1. How to Select the Series Products
The contents of the register must be reset because they are uncertain when powering on. If the power
off pin is ”L” level and step-up operation stops, the contents of the register are held inside the electric
volume by applying voltage of 2 V or more between V
register are also available under this state. The register is reset by setting VCLK to “H” and VSTRB to
“H”. The output voltage is set to the minimum value. Power on under the state where the power off
pin is being set to “L”. Next, set VCLK to “H” and VSTRB to “H” to reset the contents of the register.
Then, start step-up operation under the state where the power off pin is being set to “H”.
The S-8330/31 Series comes in three types depending upon the switching transistor attachment
method (internal or external) and the oscillating frequency. As shown in Figure 11, respective output
current targets differ to ensure high efficiency within the respective output current range. Select an
appropriate series which meets your output current requirements (see the reference data for the output
current and efficiency characteristics).
[Note]
_00
S-8330B Series: The switching transistor is built in and the oscillating frequency is 50 kHz (typ.).
S-8331A Series: The switching transistor is externally attached and the oscillating frequency is
S-8330A Series: The switching transistor is built in and the oscillating frequency is 180 kHz (typ.).
Voltage
Output
If you start step-up operation without resetting the contents of the register after powering on,
the maximum voltage is output to V
broken or damaged. It is recommended to connect a pull down resistor to the power off pin
if a problem may occur due to the maximum output voltage.
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
Figure 11 S-8330/8331 Series Depending Upon Output Current
30V
8V
Its target is the output current ranging from 1 mA to 10 mA. The oscillating
frequency of the S-8330A Series is higher than that of the S-8330B Series.
This minimizes ripple and ensures excellent transitory response characteristics.
Its target is output current of 1 mA or less. The self current consumption of the
S-8330B Series is less than that of the S-8330A Series. This ensures high
efficiency in the output current of about 0.1 mA or less.
180 kHz (typ.). Its target is the output current of 10 mA or more. High output
voltage of 30 V or more is available by only attaching a simple external circuit to
the S-8331A Series (see the S-8330 Series application circuit shown in Figure
17).
S-8330B
(f=50kHz)
A switch transistor is
built in
Seiko Instruments Inc.
1mA
S-8330A
(f=180kHz)
OUT
, and the connected device or instrument may be
Output Current
IN
10mA
to V
SS
A switch transitor is
externally attached
. Data write and reset operation in the
(f=180kHz)
S-8331
100mA
S-8330/8331 Series
19