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P1686L-S08-T Datasheet(PDF) 2 Page - Unisonic Technologies |
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P1686L-S08-T Datasheet(HTML) 2 Page - Unisonic Technologies |
2 / 6 page P1686 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 2 of 6 www.unisonic.com.tw QW-R103-039.C PIN CONFIGURATION SOP-8 HSOP-8 5 6 7 8 4 3 2 1 EN FB COMP SYNC GND SW IN BST 5 6 7 8 4 3 2 1 EN FB COMP SYNC GND SW IN BST PIN DESCRIPTION PIN NO. PIN NAME PIN FUNCTION 1 BST Providing power to the internal NPN switch. To turn on for this switch the lowest voltage is 2.7V. 2 IN This PIN delivers all control and power circuitry’s power, and sees high di/dt during switching. A decoupling capacitor is better to be attached to this pin very closely. 3 SW This PIN is the emitter of the internal switch and should be connected with the external freewheeling diode very closely. 4 GND Almost all voltages are measured with respect to this pin. The decoupling capacitor and the freewheeling diode is better to be connected to this PIN as short as possible. 5 FB Input of feedback for adjustable output controllers. 6 COMP Output of the internal error amplifier and also input of the peak current comparator. To achieve the specified performance a compensation network is connected to this pin. 7 EN Chip enable input. EN is high: the regulator switched on; EN is low: off. EN is low: the regulator is in standby mode, and the input supply current is reduced to a few microamperes. 8 SYNC Synchronous control pin used to synchronize the internal oscillator to an external pulse control signal. But it should be connected to GND when not used. |
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