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MC34717 Fiches technique(PDF) 10 Page - Freescale Semiconductor, Inc |
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MC34717 Fiches technique(HTML) 10 Page - Freescale Semiconductor, Inc |
10 / 28 page Analog Integrated Circuit Device Data 10 Freescale Semiconductor 34717 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 CHANNEL 1 BUCK CONVERTER (PVIN1, SW1, PGND1, BOOT1, INV1, COMP1, ILIM1) Switching Node (SW1) Rise Time(18) (PVIN = 3.3 V, IOUT1 = 5.0 A) tRISE1 - 8.0 - ns Switching Node (SW1) Fall Time(18) (PVIN = 3.3 V, IOUT1 = 5.0 A) tFALL1 - 5.0 - ns Minimum OFF Time tOFFMIN - 150 - ns Minimum ON Time tONMIN - 0(19) - ns Soft Start Duration (Normal Mode) ILIM1: 1.25 to 1.49 V 1.5 to 1.81 V 1.82 to 2.13 V 2.14 to 2.5 V tSS1 - - - - 3.2 1.6 0.8 0.4 - - - - ms Over-current Limit Timer tLIM1 - 10 - ms Over-current Limit Retry Timeout Period tTIMEOUT1 80 - 120 ms Output Under-voltage/Over-voltage Filter Delay Timer tFILTER1 5.0 - 25 µs CHANNEL 2 BUCK CONVERTER (PVIN2, SW2, PGND2, BOOT2, INV2, COMP2, ILIM2) Switching Node (SW2) Rise Time(18) (PVIN = 3.3 V, IOUT2 = 5.0 A) tRISE2 - 28 - ns Switching Node (SW2) Fall Time(18) (PVIN = 3.3 V, IOUT2 = 5.0 A) tFALL2 - 12.0 - ns Minimum OFF Time tOFFMIN - 150 - ns Minimum ON Time tONMIN - 0(19) - ns Soft Start Duration (Normal Mode) ILIM2: 1.25 to 1.49 V 1.5 to 1.81 V 1.82 to 2.13 V 2.14 to 2.5 V tSS2 - - - - 3.2 1.6 0.8 0.4 - - - - ms Over-current Limit Timer tLIM2 - 10 - ms Over-current Limit Retry Timeout Period tTIMEOUT2 80 - 120 ms Output Under-voltage/Over-voltage Filter Delay Timer tFILTER2 5.0 - 25 µs OSCILLATOR (FREQ)(20) Notes 18. Design information only, this parameter is not production tested. 19. The regulator has the ability to enter into pulse skip mode when the inductor current ripple reaches the threshold for the LS zero detect, which has a typical value of 500 mA. 20. Oscillator frequency is ±10% |
Numéro de pièce similaire - MC34717 |
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Description similaire - MC34717 |
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