NCP3064DFBSTGEVB ON Semiconductor

NCP3064, NCP3064B, NCV3064 Inverting Converter, Switching Regulator - Buck Boost, ON/OFF Function NCP3064, NCP3064B, NCV3064 SOIC8/PDIP8 DFN8 1 Switch Collector 8 ON/OFF Switch Collector ON/OFF Switch Emitter 2 7 I Sense pk Switch Emitter I Sense pk EP Flag Timing Capacitor V 3 6 V CC Timing Capacitor CC GND Comparator Comparator GND 4 5 Inverting Inverting Input (Top View) (Top View) Input NOTE: EP Flag must be tied to GND Pin 4 on PCB Figure 2. Pin Connections Figure 3. Pin Connections 8 TSD ON/OFF ON/OFF 1 Switch Collector Bias R Q S Comparator 7 2 I Sense pk S + Q Switch Emitter R 0.2 V 3 CT Oscillator Timing Capacitor 6 V CC Comparator 1.25 V 4 + Reference GND Regulator 5 Comparator Inverting Input Figure 4. Block Diagram PIN DESCRIPTION Pin No. Pin Name Description 1 Switch Collector Internal Darlington switch collector 2 Switch Emitter Internal Darlington switch emitter 3 Timing Capacitor Timing Capacitor Oscillator Input, Timing Capacitor 4 GND Ground pin for all internal circuits 5 Comparator Inverting input pin of internal comparator Inverting Input 6 V Voltage supply CC 7 I Sense Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak pk current through the circuit 8 ON/OFF ON/OFF Pin. Pulling this pin to High level turns the device in Operating. To switch into mode with low current consumption this pin has to be in Low level or floating.