34704_09 Datasheet, PDF (14/49 Pages) Freescale Semiconductor, Inc – Multiple Channel DC-DC Power Management IC

ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 5. Dynamic Electrical Characteristics
Characteristics noted under conditions 2.7V ≤ V_IN ≤ 5.5V, -20°C ≤ T_A ≤ 85°C, GND = 0V, 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
FREQ
Selectable Switching Frequency 1
Selectable Switching Frequency 2
Selectable Switching Frequency Step Size
Switching Frequency Accuracy
Retry Time-out Period⁽¹⁶⁾
CURRENT LIMIT MONITORING
Over-current Limit Timer⁽¹⁶⁾
Retry Time-out Period⁽¹⁶⁾
OUTPUT OVER-VOLTAGE/UNDER-VOLTAGE MONITORING
F_SW1
750
F_SW2
250
F_STEP
-
-10
t_TIMEOUT
-
t_LIMIT
-
t_RETRY
-
-
2000
kHz
-
1000
kHz
250
-
kHz
-
10
%
10
-
ms
10
-
ms
10
-
ms
Under-voltage Threshold (Response A)
V_UV-R
-
-20
-
%
Over-voltage Threshold (Response A)
V_OV-R
-
20
-
%
Under-voltage Threshold (Response B)
V_UV-R
-
-20
-
%
Over-voltage Threshold (Response B)
Filter Delay Timer⁽¹⁶⁾
V_OV-R
-
20
-
%
t_FILTER
-
20
-
μs
RST
RST Reset Delay⁽¹⁶⁾
t_RST-DELAY
-
10
ms
REGULATOR 1 & VG
Li-Ion Battery Operating Frequency^{(15), (16)}
F_SW1
750
-
1500
kHz
Operating Frequency Selection Step Size
Constant Time Off Value⁽¹⁶⁾
Low Side Time Out⁽¹⁶⁾
F_STEP
-
250
-
kHz
t_OFF
-
1.0
-
μs
t_TIMEOUT
-
15
-
μs
REGULATOR 2
Li-Ion Battery Operating Frequency⁽¹⁶⁾
F_SW1
750
-
2000
kHz
Operating Frequency Selection Step Size
F_STEP
-
250
-
kHz
Notes
15. When REG1 is used, the maximum F_SW1 Frequency programed with external components should be 1500KHz
16. Guaranteed by design.
34704
14
Analog Integrated Circuit Device Data
Freescale Semiconductor