| Pin |
Symbol |
Description |
| 1 | COMPENSATION | THIS PIN IS ERROR AMPLIFIER OUTPUT AND IS MADE AVAILABLE FOR LOOP COMPENSATION. |
| 2 | FEEDBACK | THIS IS NORMALLY CONNECTED TO THE SWITCHING POWER SUPPLY OUTPUT THROUGH A RESISTOR DIVIDER. |
| 3 | CURRENT SENSE | A VOLTAGE PROPORTIONAL TO INDUCTOR CURRENT IS CONNECTED TO THIS PIN. THE PWM USES THIS INFORMATION TO TERMINATE THE OUPUT SWITCH CONDUCTION. |
| 4 | RT/CT | THE OSCILLATOR FREQUENCY AND MAXIMUM DUTY CYCLE ARE PROGRAMMED BY CONNECTING RESISTOR RT TO VREF AND CAPACITOR CT TO GROUND . |
| 5 | GND | POWER GROUND |
| 6 | OUTPUT | THE OUTPUT DIRECTLY DRIVES THE GATE OF A POWER MOSFET. PEAK CURRENT UP TO 1AMP IS SUNK AND SOURCED BY THIS PIN. |
| 7 | VCC | IC CONTROL SUPPLY. |
| 8 | VREF | THIS IS THE REFRENCE 5V OUTPUT. IT PROVIDES CHARGING CURRENT OF CAPACITOR CT THROUGH RESISTOR RT. |
