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MC34702EK bảng dữ liệu(PDF) 10 Page - Freescale Semiconductor, Inc

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Giải thích chi tiết về linh kiện  3.0 A Switch-Mode Power Supply with Linear Regulator
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
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MC34702EK bảng dữ liệu(HTML) 10 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
10
Freescale Semiconductor
34702
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
LINEAR REGULATOR (LDO)
LDO Feedback Voltage (16)
VIN1 = VIN2 = 2.8 V to 6.0 V, ILDO = 10 mA to 1000 mA. Includes Load
Regulation Error
VLFB
0.784
0.800
0.816
V
LDO Voltage Margining Step Size
VMLDO
–1.0
%
LDO Voltage Margining Highest Positive Value
VMP
5.9
7.0
7.9
%
LDO Voltage Margining Lowest Negative Value
VMN
-7.9
7.0
-5.9
%
LDO Line Regulation (16)
VIN1 = VIN2 = 2.8 V to 6.0 V, ILDO = 1000 mA
REGLNVLDO
-1.0
1.0
%
LDO Load Regulation (16)
ILDO = 10 mA to 1000 mA
REGLDVLDO
-1.0
1.0
%
LDO Ripple Rejection, Dropout Voltage (16)
VDO = 1.0 V, VRIPPLE = +1.0 V p-p
Sinusoidal, f = 300 kHz, ILDO = 500 mA (15)
VLDO_RR
–40
dB
LDO Maximum Dropout Voltage (VIN - VLDO), using IRL2703 (16)
VLDO = 2.5 V, ILDO = 1000 mA
VDO
–50
75
mV
LDO Current Sense Comparator Threshold Voltage (VCS - VLDO)
VCSTH
35
50
65
mV
LDO Pin Input Current, VLDO = 5.25 V
ILDO
1.0
1.9
4.0
mA
LDO Feedback Input Current (LFB Pin), VLFB = 0.8 V
ILFB
-1.0
1.0
µA
LDO Drive Output Current (LDRV Pin), VLDRV = 0 V
ILDRV
-5.0
-3.3
-2.0
mA
CS Pin Input Leakage Current
VCS = 5.25 V
ICSLK
50
200
µA
LDO Pulldown MOSFET Q4 Current Limit
TA = 25°C, VBST = 8.0 V (LDO Pin)
IM4_LIM
0.75
2.0
A
LDO Pulldown MOSFET Q4 RDS(ON)
ID = 1.0 A, V
BST = 8.0 V
RDS(ON)
––
1.9
LDO Recommended Output Capacitance
CLDO
–10
µF
LDO Recommended Output Capacitor ESR
ESRCLDO
–5.0
m
Thermal Shutdown (LDO Pull-down MOSFET Q4) (15)
TSD
150
170
190
°C
Thermal Shutdown Hysteresis (15)
TSDHYS
–10
°C
Notes
15.
Design information only. This parameter is not production tested.
16.
IDO refers to Load Current on External LDOFET - IRL2703 is the Intersil MOSFET IRL2703
Table 3.
Static Electrical Characteristics (continued)
Characteristics noted under conditions -40°C TA 85°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using
the typical application circuit (see Figure 33) unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit


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