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ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. Dynamic Electrical Characteristics
Characteristics noted under conditions 3.0 V ? V IN ? 6.0 V, - 40 ? C ? T A ? 85 ? C, GND = 0 V, 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
CHANNEL 1 BUCK CONVERTER (PVIN1, SW1, PGND1, BOOT1, INV1, COMP1, ILIM1)
Switching Node (SW1) Rise Time (21)
t RISE1
-
8.0
-
ns
(P VIN = 3.3 V, IOUT1 = 5.0 A)
Switching Node (SW1) Fall Time (21)
t FALL1
-
5.0
-
ns
(P VIN = 3.3 V, IOUT1 = 5.0 A)
Minimum OFF Time
Minimum ON Time
t OFFMIN
t ONMIN
-
-
150
0 (22)
-
-
ns
ns
Soft Start Duration (Normal Mode)
t SS1
ms
ILIM1: 1.25 to 1.49 V
1.5 to 1.81 V
1.82 to 2.13 V
2.14 to 2.5 V
-
-
-
-
3.2
1.6
0.8
0.4
-
-
-
-
Over-current Limit Timer
Over-current Limit Retry Timeout Period
Output Under-voltage/Over-voltage Filter Delay Timer
t LIM1
t TIMEOUT1
t FILTER1
-
80
5.0
10
-
-
-
120
25
ms
ms
μs
CHANNEL 2 BUCK CONVERTER (PVIN2, SW2, PGND2, BOOT2, INV2, COMP2)
Switching Node (SW2) Rise Time (21)
t RISE2
-
28
-
ns
(P VIN = 3.3 V, I OUT2 = ±3.0 A)
Switching Node (SW2) Fall Time (21)
t FALL2
-
12.0
-
ns
(P VIN = 3.3 V, I OUT2 = ±3.0 A)
Minimum OFF Time
Minimum ON Time
Soft Start Duration (Normal Mode)
Over-current Limit Timer
Over-current Limit Retry Timeout Period
Output Under-voltage/Over-voltage Filter Delay Timer
t OFFMIN
t ONMIN
t SS2
t LIM2
t TIMEOUT2
t FILTER2
-
-
-
-
80
5.0
150
180
1.6
10
-
-
-
-
-
-
120
25
ns
ns
ms
ms
ms
μs
OSCILLATOR
(FREQ) (23)
Oscillator Default Switching Frequency
f SW
-
1.0
-
MHz
(FREQ = GND)
Oscillator Switching Frequency Range
f SW
200
-
1000
kHz
Notes
21. Design information only, this parameter is not production tested.
22. The regulator has the ability to enter into pulse skip mode when the inductor current ripple reaches the threshold for the LS zero detect,
which has a typical value of 500 mA.
23. Oscillator Frequency tolerance is ±10%.
34716
Analog Integrated Circuit Device Data ?
10
Freescale Semiconductor
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