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S8540 Datasheet(PDF) 5 Page - Seiko Instruments Inc

Part # S8540
Description  STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
PDF  36 Pages
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S8540 Datasheet(HTML) 5 Page - Seiko Instruments Inc

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STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_01
S-8540/8541 Series
5
Pin Configuration
8-Pin MSOP
TOP view
1
2
3
4
5
6
7
8
Figure 3
Table 3
Pin No. Pin Name
Pin Description
1
VSS
GND pin
2
EXT
Connection pin for external transistor
3
VIN
IC power supply pin
4
CVREF
Bypass capacitor connection pin for
reference voltage source
5
ON/ OFF
Shutdown pin
Soft-start capacitor connection pin
• Normal operation (step-down operation)
• All circuit halts (no step-down operation)
6
NC*1
None connected (A, C types)
FB
Feed back pin (B, D types)
7
VOUT
Output voltage pin
8
SENSE
Current limit detection pin
*1.
The NC pin is electrically open.
The NC pin can be connected to VIN and VSS.



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