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AN8017SA Datasheet(PDF) 7 Page - Panasonic Semiconductor |
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AN8017SA Datasheet(HTML) 7 Page - Panasonic Semiconductor |
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7 / 25 page  Voltage Regulators AN8017SA 7 s Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description I/O 4 FB1: O The output pin for error amplifier 1 block. The source current is −47 µA and the sink current is 47 µA. Correct the frequency characteristics of the gain and the phase by connecting a resistor and a capacitor between this terminal and GND. 5 DT1: I The pin for setting channel 1 output maximum duty ratio. If this terminal is set at a voltage of 0.20 V or less, FB1 terminal becomes low-level voltage and the protective function for channel 1 output short-cir- cuit will stop (Unlatch function). 6 RB1: I The pin for connecting a resistor for setting channel 1 output current. Use a resistance value in the range of 180 Ω to 15 kΩ. The terminal voltage is 0.36 V (at RB1 = 820 Ω). 7 Out1: O The pin is push-pull type output terminal. The absolute maximum ratings of output current are −50 mA for the source current and +80 mA for the sink current. A constant current output with less fluctuation with power supply voltage and dispersion can be ob- tained by the resistor externally attached to RB1 pin. ISO(OUT)1 = 68 × VRB1 [A] RB1 8 GND: Grounding terminal 9VCC: The supply voltage application terminal Use the operating supply voltage in the range of 1.8 V to 14 V. VCC IN −1 4 1.19 V 47 µA OSC PWM 47 µA VCC FB1 5 0.20 V OSC PWM VCC 6 120 Ω 30 k Ω Out1 VCC ISO(OUT)1 7 30 k Ω RB1 8 9 |
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