S-8335A160FT-TB-G Seiko Instruments, S-8335A160FT-TB-G Datasheet - Page 22

• Manufacturer Part Number: S-8335A160FT-TB-G
• Description: IC REG SW 3CH STEP UP 24-TSSOP
• Manufacturer: Seiko Instruments
• Type: Step-Up (Boost), Invertingr

Specifications of S-8335A160FT-TB-G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 7.48 ~ 13.93 V, -5.44 ~ -10.13 V
• Frequency - Switching: 100kHz
• Voltage - Input: 2.4 ~ 5 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Power - Output: 650mW
• Output Voltage: 13.93 V
• Operating Temperature Range: - 20 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

22
STEP-UP, FOR LCD BIAS SUPPLY, 3-CHANNEL SWITCHING REGULATOR
S-8335 Series
The electric volume has 6-bit resolution. The integral and differential linearity errors are
example, if you want the VRH output voltage range to vary between 8.91 and 16.59 V, you can obtain a
linearity precision of
Since the register contents are undefined when the power is turned on, they must be reset. Even if the
MC1 pin or MC2 pin is set high ("H" level) and the MC3 signal is set low ("L" level) and the step-up
operation stops, the electric volume register contents are retained if a voltage of at least 2 V is applied
between the VBAT and VSS pins. Register “WRITE” and “RESET” operations are also available in this
state.
The register is initialized to “000000” and the output voltage is set to its minimum value by setting VCLK =
"H" and VSTR_B = "L".
Turn on the power with MCI = “H” and MC3 = “L”. Then initialize the register contents by setting VCLK =
"H" and VSTR_B="L" and begin the step-up operation by switching the MC1 and MC2 pins low ("L" level)
and the MC3 signal high ("H" level).
Caution:
Note:
If a step-up operation is started without initializing the data in the register after turning on the
power, the maximum output voltage may appear at the VOUT pins and connected devices or
instruments may be damaged. It is recommended to connect a pull-down resistor between V
and the external part pins that the MC3 signal enters and to connect a pull-up resistor between
the MC1 pin and V
If there is a potential difference between
the applied voltage to VDIN, VCLK, and
VSTR_B and the power supply voltage of
the
consumption in standby mode may exceed
1 µA.
voltage to VDIN, VCLK, and VSTR_B is
3.0 V and the power supply voltage of the
S-8335 Series is 5.0 V, the current
consumption in standby mode rises to
approximately 2.5 µA at 25°C (typ.) (see
Figure 11). The reason this occurs is that
a penetrating current flows in the CMOS
logic circuits because the potential of input
signals VDIN, VCLK, and VSTR_B (3.0 V)
is lower than the internal logic power
supply voltage (5.0 V). A similar situation
occurs for the power supply voltage of
MC1 and MC2 (see Note in the Mode
Control section).
S-8335
For example, when the applied
±
61 mV by selecting the S-8335A240FT.
Series,
BAT
.
the
Seiko Instruments Inc.
current
Figure 11 Standby Mode Current Characteristics
2.5
1.5
0.5
3
2
1
0
2.0
V
DIN
2.5
= 3.0 V
3.0
V
BAT
3.5
[V]
4.0
±
Rev.6.0
0.5LSB. For
4.5
5.0
_01
SS