S-8330A24FS-T2 Seiko Instruments, S-8330A24FS-T2 Datasheet - Page 17

• Manufacturer Part Number: S-8330A24FS-T2
• Description: Switching Converters, Regulators & Controllers 12-24V 100uA 2.4%
• Manufacturer: Seiko Instruments

Specifications of S-8330A24FS-T2

• Output Voltage: 24 V
• Output Current: 5 mA
• Input Voltage: 2 V to 9 V
• Operating Temperature Range: - 20 C to + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-8
• Duty Cycle (max): 84 %
• Number Of Outputs: 1
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.6.0
2. Power off pin (
The power off pin is configured as shown in Figure 8. DO NOT use this circuit under the floating state
because the power off pin is not internally pulled up nor pulled down. If 0.4 V to 2.4 V when V
V, 0.4 V to 1.6 V when V
When the power off pin is not used, connect it to V
The power off pin is not provided with hysteresis.
This pin stops and starts set up operation.
Turnig the power off pin to “L” stops the operation of the internal circuits excluding the electric volume,
minimizes current consumption and short-curcuits V
and a diode at the input side into V
Figure 7 shows a circuit example using the NEC 2SJ356 (Pch MOS FET) as a current cutting switch.
This circuit example turns ON and OFF the 2SJ356 in connection with the reset signal to the power off
pin using a small signal transistor M
clamping voltage so as not to apply high voltage (20V or more) of the rated voltage between the gate
and the source of the 2SJ356. However, when the circuit is used at 20 V or below, a Zenor diode is
not needed. Invalid current flowing into resistors R
efficiency. Set R
in the voltage occurs in resistor R
not normally function. Be careful (Note that the efficiency characteristics shown in the reference data
were measured without attaching a current cutting switch and is different from that shown in this
example).
_00
Power off pin
“H”
“L”
ON
V
IN
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
A
L
/
, R
OFF
B
Operation
CR OSC
CONT
to the maximum level. If you set the resistance of R
IN
Stop
pin)
Figure 7 Circuit Example Using 2SJ356
< 3.0V are applied, current consumption increases. DO NOT apply voltage.
V
SS
RESET
A
SS
due to off current of M
N
. Therefore, a switch to cut off the current is needed.
Seiko Instruments Inc.
Output voltage
(Nch MOS FET). A Zenor diode (ZD) is used for the purpose of
Setting value
V
SBD
SS
IN
pin.
ON/OFF
OUT
V
OUT
A
, R
pin to V
N
B
and the current cutting switch 2SJ356 does
R
500kΩ
A
ON/OFF
during step-up operation may affect the
:
ZD:15V
SS
. At this time, current flows via coils
2SJ356
R
M
Figure 8
B
N
:1MΩ
A
S-8330/8331 Series
to the high value, a drop
VIN
VSS
+
−
CL
IN
≥ 3.0
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