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CS5150 Datasheet(PDF) 5 Page - ON Semiconductor |
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CS5150 Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 18 page CS5150 http://onsemi.com 5 PACKAGE PIN DESCRIPTION PACKAGE PIN # PIN SYMBOL FUNCTION SO−16, DIP−16 1, 2, 3, 4 VID0−VID3 Voltage ID DAC input pins. These pins are internally pulled up to 5.0 V providing logic ones if left open. The DAC range is 2.14 V to 3.54 V with 100 mV increments. VID0 − VID3 select the desired DAC output voltage. Leaving all 4 DAC input pins open results in a DAC output voltage of 1.244 V, allowing for adjustable output voltage, using a traditional resistor divider. 5 SS Soft Start Pin. A capacitor from this pin to LGND in conjunc- tion with internal 60 μA current source provides Soft Start function for the controller. This pin disables fault detect func- tion during Soft Start. When a fault is detected, the Soft Start capacitor is slowly discharged by internal 2.0 μA current source setting the time out before trying to restart the IC. Charge/discharge current ratio of 30 sets the duty cycle for the IC when the regulator output is shorted. 6 NC No Connection. 7 COFF A capacitor from this pin to ground sets the time duration for the on board one shot, which is used for the constant off time architecture. 8 VFFB Fast feedback connection to the PWM comparator. This pin is connected to the regulator output. The inner feedback loop terminates on time. 9 VCC2 Boosted power for the high side gate driver. 10 VGATE(H) High FET driver pin capable of 1.5 A peak switching current. Internal circuit prevents VGATE(H) and VGATE(L) from being in high state simultaneously. 11 PGND High current ground for the IC. The MOSFET drivers are referenced to this pin. Input capacitor ground and the source of lower FET should be tied to this pin. 12 VGATE(L) Low FET driver pin capable of 1.5 A peak switching current. 13 VCC1 Input power for the IC and low side gate driver. 14 LGND Signal ground for the IC. All control circuits are referenced to this pin. 15 COMP Error amplifier compensation pin. A capacitor to ground should be provided externally to compensate the amplifier. 16 VFB Error amplifier DC feedback input. This is the master voltage feedback which sets the output voltage. This pin can be con- nected directly to the output or a remote sense trace. |
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