34704_11 Datasheet, PDF (13/54 Pages) Freescale Semiconductor, Inc – Multiple Channel DC-DC Power Management IC

ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics (continued)
Characteristics noted under conditions 2.7 V ≤ V_IN ≤ 5.5 V, -20°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
REGULATOR 8
Output Voltage Range
Output Accuracy
V_OUT
5.0⁽¹⁹⁾
15
15
V
-
-4.0
-
4.0
%
Feedback Reference Voltage
Feedback Reference Voltage on current regulation mode
Dynamic Voltage Scaling Range
Dynamic Voltage Scaling Step Size
Line/Load Regulation⁽¹⁸⁾
Continuous Output Current⁽¹⁸⁾
Over-current Limit (Detected in low side FET)
Short-circuit Current Limit (Detected in the Blocking FET)
Over-current Limit Accuracy
V_FB
-
0.600⁽²⁰⁾
-
V
V_FB
-
0.230⁽²¹⁾
-
V
V_DYN
-10
-
10
%
V_{DYN_STEP}
-
2.5
-
%
REG_LN/LD
-1.0
-
1.0
%
I_OUT
-
15
30
mA
I_{LIM_ION}
-
1.0
-
A
I_{SHORT_ION}
-
1.5
-
A
-
-20
-
20
%
N-CH Switch Power MOSFET R_DS(ON)
N-CH Synch. Power MOSFET R_DS(ON)
N-CH Shutdown Power MOSFET R_DS(ON)
Discharge MOSFET R_DS(ON)
Thermal Shutdown Threshold⁽¹⁸⁾
Thermal Shutdown Hysteresis⁽¹⁸⁾
SW8 Leakage Current (Off State) @25°C
R_DS(ON)-_SW
-
R_DS(ON)-_SY
-
R_DS(ON)-_SH
-
R_DS(ON)-_DIS
-
T_SD
-
T_SD-HYS
-
I_{SW8_LKG}
-
450
-
mΩ
1000
-
mΩ
450
-
mΩ
70
-
Ω
170
-
°C
25
-
°C
-
1.0
μA
Notes
18. Guaranteed by Design
19. When Battery voltage is higher than 5.0V and VOUT8 is 5.0V, a polarization diode is necessary to achieve accurate output voltage. See
Component Calculation on page 39 for further details.
20. V_FB is 0.6V when the part ist powered up and no DVS is changed. DVS is achieved by modifying V_FB reference.
21. When in Current regulation mode, the Voltage reference is set to 0.230mV to set the maximum current, and it is internally decreased to
achieve a factor of the maximum current passing through the LED string
Analog Integrated Circuit Device Data
Freescale Semiconductor
34704
13