34716 查看數據表（PDF） - Freescale Semiconductor
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34716 Datasheet PDF : 25 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
CHANNEL 1 BUCK CONVERTER (PVIN1, SW1, PGND1, BOOT1, INV1, COMP1, ILIM1)
Switching Node (SW1) Rise Time (22)
(PVIN = 3.3 V, IOUT1 = 5.0 A)
Switching Node (SW1) Fall Time (22)
(PVIN = 3.3 V, IOUT1 = 5.0 A)
tRISE1
-
tFALL1
-
Soft Start Duration (Normal Mode)
tSS1
ILIM1: 1.25V to 1.49V
-
1.5V to 1.81V
-
1.82V to 2.13V
-
2.14V to 2.5V
-
Over Current Limit Timer
tLIM1
-
Over Current Limit Retry Time-out Period
tTIMEOUT1
80
Output Undervoltage/Overvoltage Filter Delay Timer
tFILTER1
5.0
CHANNEL 2 BUCK CONVERTER (PVIN2, SW2, PGND2, BOOT2, INV2, COMP2)
Switching Node (SW2) Rise Time (22)
(PVIN = 3.3 V, IOUT2 = ±3.0 A)
Switching Node (SW2) Fall Time (22)
(PVIN = 3.3 V, IOUT2 = ±3.0 A)
tRISE2
-
tFALL2
-
Soft Start Duration (Normal Mode)
tSS2
-
Over Current Limit Timer
tLIM2
-
Over Current Limit Retry Time-out Period
tTIMEOUT2
80
Output Undervoltage/Overvoltage Filter Delay Timer
OSCILLATOR (FREQ) (23)
tFILTER2
5.0
Oscillator Default Switching Frequency
(FREQ = GND)
fSW
-
Oscillator Switching Frequency Range
CONTROL AND SUPERVISORY (STBY, SD, PG)
fSW
200
8.0
-
ns
5.0
-
ns
ms
3.2
-
1.6
-
0.8
-
0.4
-
10
-
ms
-
120
ms
-
25
µs
28
-
ns
12.0
-
ns
1.6
-
ms
10
-
ms
-
120
ms
-
25
µs
1.0
-
MHz
-
1000
kHz
PG Reset Delay
Thermal Shutdown Retry Time-out Period (22)
tPGRESET
8.0
-
12
ms
tTIMEOUT
80
-
120
ms
Notes
22. Design information only, this parameter is not production tested.
23. Oscillator Frequency tolerance is ±10%.
34716
10
Analog Integrated Circuit Device Data
Freescale Semiconductor
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