MC34712EP 查看數據表（PDF） - Freescale Semiconductor
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MC34712EP Datasheet PDF : 24 Pages
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ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. Dynamic Electrical Characteristics
Characteristics noted under conditions 3.0 V ≤ VIN ≤ 6.0 V, -40°C ≤ TA ≤ 85°C, GND = 0 V, 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
BUCK CONVERTER (PVIN, SW, GND, BOOT)
Switching Node (SW) Rise Time(19)
(PVIN = 3.3 V, IOUT = ±3.0 A)
Switching Node (SW) Fall Time(19)
(PVIN = 3.3 V, IOUT = ±3.0 A)
Minimum OFF Time
Minimum ON Time
Soft Start Duration
(Normal Mode)
tRISE
-
14
-
ns
tFALL
-
20
-
ns
tOFFMIN
-
150
-
ns
tONMIN
-
100
-
ns
tSS
1.3
-
2.6
ms
Over-current Limit Timer
Over-current Limit Retry Timeout Period
Output Under-voltage/Over-voltage Filter Delay Timer
OSCILLATOR (FREQ)
Oscillator Default Switching Frequency(18)
(FREQ = GND)
tLIM
-
10
-
ms
tTIMEOUT
80
-
120
ms
tFILTER
5.0
-
25
µs
FSW
-
1.0
-
MHz
Oscillator Switching Frequency Range
CONTROL AND SUPERVISORY (STBY, SD, PG)
FSW
200
-
1000
kHz
PG Reset Delay
Thermal Shutdown Retry Time-out Period(19)
tPGRESET
8.0
-
12
ms
tTIMEOUT
80
-
120
ms
Notes
18. Oscillator Frequency tolerance is ±10%.
19. Design information only, this parameter is not production tested.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34712
9
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