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MC34712EPR2 Scheda tecnica(PDF) 3 Page - Freescale Semiconductor, Inc |
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MC34712EPR2 Scheda tecnica(HTML) 3 Page - Freescale Semiconductor, Inc |
3 / 23 page Analog Integrated Circuit Device Data Freescale Semiconductor 3 34712 PIN CONNECTIONS PIN CONNECTIONS Figure 3. 34712 Pin Connections Table 1. 34712 Pin Definitions A functional description of each pin can be found in the Functional Pin Description section beginning on page 10. Pin Number Pin Name Pin Function Formal Name Definition 1 GND Ground Signal Ground Analog signal ground of IC 2 FREQ Passive Frequency Adjustment Buck converter switching frequency adjustment pin 3 NC None No Connect No internal connections to this pin 4 PG Output Power Good Active-low (open drain) power-good status reporting pin 5 STBY Input Standby Standby mode input control pin 6 SD Input Shutdown Shutdown mode input control pin 7 VREFIN Input Voltage-Tracking- Reference Input Voltage-Tracking-Reference voltage input 8 VREFOUT Output Reference Voltage Output Buffered output equal to 1/2 of voltage-tracking reference 9 COMP Passive Compensation Buck converter external compensation network pin 10 INV Input Error Amplifier Inverting Input Buck converter error amplifier inverting input pin 11 VOUT Output Output Voltage Discharge FET Discharge FET drain connection (connect to buck converter output capacitors) 12,13,14 PGND Ground Power Ground Ground return for buck converter and discharge FET 15,16,17 SW Power Switching Node Buck converter power switching node 18,19,20 PVIN Supply Power-Circuit Supply Input Buck converter main supply voltage input 21 BOOT Passive Bootstrap Bootstrap switching node (connect to bootstrap capacitor) GND FREQ STBY PG NC SD SW PGND PGND SW SW PVIN Transparent 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Top View |
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