S1F71200 Series
PIN DESCRIPTIONS
Pin No. | Pin name | Pin type | Power system | Description | ||
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1 | VDD1 | Power supply | VDD1 | Power pin 1 (+), Input power pin | ||
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2 | VDD2 | Power supply | VDD2 | Power pin 2 (+), Power pin for series regulator | ||
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3 | EXO | Output | VDD2 | PNP transistor base drive pin for series regulator | ||
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4 | VO | — | — | |||
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5 | SRC | — | — | Series regulator phase compensation capaci- | ||
tor connection pin |
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6 | IREF | Output | VDD1 | Reference resistor connection pin. Connect a | ||
100kΩ resistor between the VSS pins. | ||||||
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7 | VREF | Output | VDD1 | Reference voltage pin. Connect a 0.1μF | ||
capacitance between the VSS pins. | ||||||
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8 | (N.C) | — | — | No connection |
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| Power off control pin. |
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9 | POFFX | Input | VDD1 | During normal operation : POFFX = VDD1 | ||
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| At power off time | : POFFX = VSS | |
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10 | VC | Input | VDD1 | For setting VSW = VO + 1.0V : VC = VDD1 | ||
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| For setting VSW = VO + 0.5V : VC = VSS | ||
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11 | SWC | — | — | Switching regulator phase compensation | ||
capacitor connection pin |
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12 | VSW | — | — | |||
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13 | VSS | — | — | Power pin | ||
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14 | SSC | — | VDD1 | Capacitor connection pin for soft start | ||
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15 | ISENSE | Input | VDD1 | Overcurrent detection pin | ||
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16 | SWO | Output | VDD1 | |||
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EPSON |
S1F70000 Series Technical Manual