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MC34712 Datasheet(PDF) 9 Page - Freescale Semiconductor, Inc |
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MC34712 Datasheet(HTML) 9 Page - Freescale Semiconductor, Inc |
9 / 24 page Analog Integrated Circuit Device Data Freescale Semiconductor 9 34712 ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 4. Dynamic Electrical Characteristics Characteristics noted under conditions 3.0 V ≤ V IN ≤ 6.0 V, - 40°C ≤ T A ≤ 85°C, GND = 0 V, unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions, unless otherwise noted. Characteristic Symbol Min Typ Max Unit BUCK CONVERTER (PVIN, SW, GND, BOOT) Switching Node (SW) Rise Time(19) (PVIN = 3.3 V, IOUT = ±3.0 A) tRISE - 14 - ns Switching Node (SW) Fall Time(19) (PVIN = 3.3 V, IOUT = ±3.0 A) tFALL - 20 - ns Minimum OFF Time tOFFMIN - 150 - ns Minimum ON Time tONMIN - 100 - ns Soft Start Duration (Normal Mode) tSS 1.3 - 2.6 ms Over-current Limit Timer tLIM - 10 - ms Over-current Limit Retry Timeout Period tTIMEOUT 80 - 120 ms Output Under-voltage/Over-voltage Filter Delay Timer tFILTER 5.0 - 25 µs OSCILLATOR (FREQ) Oscillator Default Switching Frequency(18) (FREQ = GND) FSW - 1.0 - MHz Oscillator Switching Frequency Range FSW 200 - 1000 kHz CONTROL AND SUPERVISORY (STBY, SD, PG) PG Reset Delay tPGRESET 8.0 - 12 ms Thermal Shutdown Retry Time-out Period(19) tTIMEOUT 80 - 120 ms Notes 18. Oscillator Frequency tolerance is ±10%. 19. Design information only, this parameter is not production tested. |
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