mc33702 Freescale Semiconductor, Inc, mc33702 Datasheet - Page 10

• Manufacturer Part Number: mc33702
• Description: 3.0 A Switch-mode Power Supply With Linear Regulator
• Manufacturer: Freescale Semiconductor, Inc

33702
10
DYNAMIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions -40°C T
application circuit (see
BUCK CONVERTER
OSCILLATOR
BOOST REGULATOR
Notes
Duty Cycle Range (Normal Operation)
Switching Node SW Rise Time
Switching Node SW Fall Time
Maximum Deadtime
Buck Control Loop Propagation Delay
Soft Start Duration (Power Sequencing Disabled, EN1 = 1, EN2 = 1)
Fault Condition Timeout
Retry Timer Cycle
Oscillator Default Frequency (Switching Frequency), FREQ Pin Open
Oscillator Frequency Range
Oscillator Frequency Accuracy
Oscillator Frequency Accuracy
Oscillator Output Signal Duty Cycle (Square Wave, 180° Out-of-Phase with the
Internal Suitable Oscillator)
Synchronization Pulse Minimum Duration
Boost Regulator FET Maximum ON Time
Boost Regulator Control Loop Propagation Delay
Boost Switching Node V
Boost Switching Node V
9.
I
I
V
Low Level
R
R
I
I
LOAD
LOAD
BST
BST
INV
F
F
= 100 k
= 200 k
Design Information only. Not production tested.
= 20 mA
= 20 mA
< 0.8 V to V
= 3.0 A
= 3.0 A
SW
(Note 9)
> 90% of High Level or V
BD
BD
Figure
Rise Time
Fall Time
(Note 9)
Characteristic
(Note 9)
20) unless otherwise noted.
(Note 9)
(Note 9)
(Note 9)
Freescale Semiconductor, Inc.
For More Information On This Product,
INV
(Note 9)
J
> 0.8 V to V
125 C unless otherwise noted. Input voltages V
Go to: www.freescale.com
SW
< 10% of
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
Symbol
t
t
t
BST_PD
t
t
B_RISE
B_FALL
D
FAULT
t
t
f
f
f
f
SYNC
RISE
FALL
t
OSC
OSC
OSC
OSC
t
t
t
R
OSC
t
PD
ON
D
SS
D
et
Min
200
270
200
360
180
300
0
–
–
–
–
–
–
–
–
–
–
–
IN1
= V
TBD
TBD
TBD
Typ
350
100
300
400
200
50
10
50
24
50
15
15
IN2
–
–
= 3.3 V using the typical
Max
800
330
400
440
220
90
40
40
–
–
–
–
–
–
–
–
–
–
Unit
kHz
kHz
kHz
kHz
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
%
%
s
s