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S8540 Datasheet(PDF) 5 Page - Seiko Instruments Inc |
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S8540 Datasheet(HTML) 5 Page - Seiko Instruments Inc |
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5 / 36 page  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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