MC33998 데이터 시트보기 (PDF) - Freescale Semiconductor

부품명

상세내역

제조사

MC33998

Switching Power Supply with Linear Regulators

Freescale Semiconductor 

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)

Soft Start Duration (see Figure 2)

VPWR = KA_VPWR = 6.0 V

fSW

–

750

–

kHz

tSS

ms

5.0

–

15

CHARGE PUMP (CRES)

Charge Pump Current Ramp-Up Time

VPWR = KA_VPWR = 14 V, CRES = 22 nF, VCP = 1.0 V to 11 V

Charge Pump Ramp-Up Time

VPWR = KA_VPWR = 7.0 V, CRES = 22 nF, VCP = 7.0 V to 10 V

tCRES

1.0

–

tCRES

1.0

–

ms

20

ms

10

SENSOR SUPPLIES (VREF1, VREF2)

VREF Overcurrent Detection Time (see Figure 3)

tDET

µs

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

0.5

–

2.0

VREF Retry Timer Delay (see Figure 3)

tRET

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

5.0

–

ms

20

SUPERVISORY CIRCUITS (VPWR)

PWROK Delay Time (Power-On Reset) (see Figure 4)

VKAMOK Delay Time (see Figure 5)

VDDH Power-Up Delay Time (see Figure 6)

Fault-Off Timer Delay Time (see Figure 7)

Notes

14. Guaranteed by design but not production tested.

tD(PWROK)

5.0

–

tD(VKAMOK)

10

–

tD(VPWR)

1.0

–

tFAULT

1.0

–

15

ms

30

ms

10

ms

10

ms

33998

11

Analog Integrated Circuit Device Data

Freescale Semiconductor

Share Link: