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MC33998 数据表(PDF) 11 Page - Freescale Semiconductor, Inc |
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MC33998 数据表(HTML) 11 Page - Freescale Semiconductor, Inc |
11 / 20 page Analog Integrated Circuit Device Data 11 Freescale Semiconductor 33998 ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 4. DYNAMIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions 9.0 V ≤ VPWR ≤ 16 V, -40°C ≤ TJ = TA ≤ 125°C using the typical application circuit (see Figure 8) unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted. Characteristic Symbol Min Typ Max Unit BUCK REGULATOR (VDDH) Switching Frequency (14) fSW – 750 – kHz Soft Start Duration (see Figure 2) VPWR = KA_VPWR = 6.0 V tSS 5.0 – 15 ms CHARGE PUMP (CRES) Charge Pump Current Ramp-Up Time VPWR = KA_VPWR = 14 V, CRES = 22 nF, VCP = 1.0 V to 11 V tCRES 1.0 – 20 ms Charge Pump Ramp-Up Time VPWR = KA_VPWR = 7.0 V, CRES = 22 nF, VCP = 7.0 V to 10 V tCRES 1.0 – 10 ms SENSOR SUPPLIES (VREF1, VREF2) VREF Overcurrent Detection Time (see Figure 3) VREF Load RL = 5.0 Ω to GND, VDDH = 5.1 V, VPWR = KA_VPWR = 10 V, EN = 5.0 V, SNSEN = 5.0 V tDET 0.5 – 2.0 µs VREF Retry Timer Delay (see Figure 3) VREF Load RL = 5.0 Ω to GND, VDDH = 5.1 V, VPWR = KA_VPWR = 10 V, EN = 5.0 V, SNSEN = 5.0 V tRET 5.0 – 20 ms SUPERVISORY CIRCUITS (VPWR) PWROK Delay Time (Power-On Reset) (see Figure 4) tD(PWROK) 5.0 – 15 ms VKAMOK Delay Time (see Figure 5) tD(VKAMOK) 10 – 30 ms VDDH Power-Up Delay Time (see Figure 6) tD(VPWR) 1.0 – 10 ms Fault-Off Timer Delay Time (see Figure 7) tFAULT 1.0 – 10 ms Notes 14. Guaranteed by design but not production tested. |
类似零件编号 - MC33998 |
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类似说明 - MC33998 |
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