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