MC34921R2 Ver la hoja de datos (PDF) - Freescale Semiconductor
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MC34921R2 Datasheet PDF : 36 Pages
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STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0°C ≤ TA ≤ 70°C, and 0°C ≤ TJ ≤ 100°C 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
5.0 V Switching Regulator
Vreg Threshold
Cycle-by-Cycle Current Limit Threshold
V5.0 = 2.0 V to Max
V5.0 ≤ 1.0 V
V5.0 to Turn On/Off V3.3 Regulator (8)
Hysteresis for V5_3.3t (8)
3.3 V Switching Regulator
V5.0
4.8
5.0
5.2
V
I LIMIT
A
0.75
1.2
2.25
–
1.0
–
V5_3.3 t
–
2.2
–
V
V5_3.3 t_hys
–
175
–
mV
Vreg Threshold
Cycle-by-Cycle Current Limit Threshold
V3.3 = 2.0 V to Max
V3.3 ≤ 1.0 V
V3.3
3.15
3.28
3.45
V
I LIMIT
A
2.75
3.6
5.5
–
3.5
–
VCORE 3.3V Linear Regulator
Voltage Tolerance
ICORE = 0.02 A to 0.3 A, VNOM = 2.5 V
ICORE = 0.02 A to 0.3 A, VNOM = 1.8 V
ICORE 0 0.02 A to 0.3 A, VNOM = 1.5 V
Load Regulation
ILOAD = 20 mA to 300 mA
Current Limit Threshold
Motor Drivers in DC Mode
VCORE_TOL
V
2.35
2.49
2.66
1.675
1.78
1.925
1.4
1.49
1.6
VILOAD
I LIMIT
mV
–
± 10
± 100
400
750
1200
mA
Motor Driver A High- or Low-Side Switch Voltage Drop
IPWM = 1.7 A, GND or B+ to Output
Motor Driver A Output Current Limit
Motor Driver B High- or Low-Side Switch Voltage Drop
IPWM = 2.0 A, GND or B+ to Output
Motor Driver B Output Current Limit
Motor Driver C High- or Low-Side Switch Voltage Drop
IPWM = 0.375 A, GND or B+ to Output
Motor Driver C Current Limit—Top Side
Motor Driver C Current Limit—Bottom Side
Notes
8. See Figure 10, Power-Up Sequencing, page 22.
VDROP(A)
V
–
.65
1.5
I LIMIT(A)
3.6
4.9
7.2
A
VDROP(B)
V
–
.70
1.4
I LIMIT(B)
2.8
4.9
7.2
A
VDROP(C)
V
–
.75
1.5
I LIMIT1(C)
0.75
1.2
1.5
A
I LIMIT2(C)
1.0
1.65
2.0
A
Analog Integrated Circuit Device Data
Freescale Semiconductor
34921
9
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