MC34921 Datasheet, PDF (9/36 Pages) List of Unclassifed Manufacturers – Configurable Motor Driver IC with Power Supplies

STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0°C ≤ T_A ≤ 70°C, and 0°C ≤ T_J ≤ 100°C unless otherwise noted.
Typical values noted reflect the approximate parameter means at T_A = 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
V_5.0 = 2.0 V to Max
V_5.0 ≤ 1.0 V
V_5.0 to Turn On/Off V_3.3 Regulator ⁽⁸⁾
Hysteresis for V_{5_3.3t} ⁽⁸⁾
3.3 V Switching Regulator
V_5.0
4.8
5.0
5.2
V
I _LIMIT
A
0.75
1.2
2.25
–
1.0
–
V_{5_3.3 t}
–
2.2
–
V
V_{5_3.3 t_hys}
–
175
–
mV
Vreg Threshold
Cycle-by-Cycle Current Limit Threshold
V_3.3 = 2.0 V to Max
V_3.3 ≤ 1.0 V
V_3.3
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
I_CORE = 0.02 A to 0.3 A, V_NOM = 2.5 V
I_CORE = 0.02 A to 0.3 A, V_NOM = 1.8 V
I_CORE 0 0.02 A to 0.3 A, V_NOM = 1.5 V
Load Regulation
I_LOAD = 20 mA to 300 mA
Current Limit Threshold
Motor Drivers in DC Mode
V_{CORE_TOL}
V
2.35
2.49
2.66
1.675
1.78
1.925
1.4
1.49
1.6
V_ILOAD
I _LIMIT
mV
–
± 10
± 100
400
750
1200
mA
Motor Driver A High- or Low-Side Switch Voltage Drop
I_PWM = 1.7 A, GND or B+ to Output
Motor Driver A Output Current Limit
Motor Driver B High- or Low-Side Switch Voltage Drop
I_PWM = 2.0 A, GND or B+ to Output
Motor Driver B Output Current Limit
Motor Driver C High- or Low-Side Switch Voltage Drop
I_PWM = 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 9, Power-Up Sequencing, page 21.
V_DROP(A)
V
–
.65
1.5
I _LIMIT(A)
3.6
4.9
7.2
A
V_DROP(B)
V
–
.70
1.4
I _LIMIT(B)
2.8
4.9
7.2
A
V_DROP(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