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S8353 Datasheet(PDF) 17 Page - Seiko Instruments Inc

Part # S8353
Description  STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
PDF  49 Pages
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S8353 Datasheet(HTML) 17 Page - Seiko Instruments Inc

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STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_01
S-8353/8354 Series
17
3.
OFF
/
ON
Pin (Shutdown Pin) (SOT-23-5 Package Products of A and H Types)
OFF
/
ON
pin stops or starts step-up operation.
Setting the
OFF
/
ON
pin to the “L” level stops operation of all the internal circuits and reduces the current
consumption significantly.
DO NOT use the
OFF
/
ON
pin in a floating state because it has the structure shown in Figure 10 and is not pulled
up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0.75 V to the
OFF
/
ON
pin because
applying such a voltage increases the current consumption. If the
OFF
/
ON
pin is not used, connect it to the VOUT
pin.
The
OFF
/
ON
pin does not have hysteresis.
Table 17
OFF
/
ON
pin
CR oscillation circuit
Output voltage
“H”
Operation
Fixed
“L”
Stop
≅VIN*1
*1.
Voltage obtained by subtracting the voltage drop due to the DC resistance of the inductor and the diode forward
voltage from VIN.
VSS
VOUT
OFF
/
ON
Figure 10
OFF
ON/
Pin Structure



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