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MC34703 Arkusz danych(PDF) 8 Page - Freescale Semiconductor, Inc

Numer części MC34703
Szczegółowy opis  10A Switch-Mode Power Supply with LDO Regulator
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Producent  FREESCALE [Freescale Semiconductor, Inc]
Strona internetowa  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34703 Arkusz danych(HTML) 8 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
8
Freescale Semiconductor
34703
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
BUCK ERROR AMPLIFIER (INV, COMP)
Input Impedance (13)
RIN
14
M
Output Impedance (13)
ROUT
1.4
k
DC Open Loop Gain (13)
AVOL
80
dB
Gain Bandwidth Product (13)
GBW
4.0
MHz
Slew Rate (13)
SR
2.0
V/
µs
Output Voltage Swing – High Level
VIN1 > 3.3 V, IOEA = -400 mA
(13)
VEAOH
2.0
V
Output Voltage Swing – Low Level
IOEA = 400 mA
(13)
VEAOL
0.4
V
Slope Compensation Ramp (13)
VSCRAMP
0.6
V
OSCILLATOR (FREQ)
Oscillator Low-Level Output Voltage (CLKSYN Pin),
CLKSEL Open
VOSCOL
0.1
0.4
V
Oscillator High-Level Output Voltage (CLKSYN Pin),
CLKSEL Open (14)
VOSCOH
2.7
3.3
V
Oscillator Input Voltage Threshold (CLKSYN Pin),
CLKSEL Grounded
VOSCIH
1.2
1.6
2.0
V
Oscillator Frequency Adjusting Reference Voltage (FREQ) (16)
VFREQ
1.15
1.27
1.35
V
Oscillator Frequency Adjusting Resistor Range (16)
RFREQ
5.0
20
k
BOOST REGULATOR (VBST, VIN)
Boost Regulator Output Voltage
IBST = 20mA, VIN1 = VIN2 = 2.8 V to 8.0 V
VBST
7.5
8.0
8.5
V
Boost Regulator Output Voltage(15)
IBST = 20mA, VIN1 = VIN2 > 8.0V
VBST(VGREG)
7.5
8.0
8.8
V
Boost Regulator Start-Up Voltage
VINBSU
1.6
1.8
V
Boost Regulator Peak Current Limit (Power FET Peak Current)
IPBD
0.75
1.0
1.5
A
Boost Regulator Power FET Valley Current Limit (Low Level)
ILBD
550
600
900
mA
Boost Power FET RDS(ON)
(16)
IBST = 500 mA, VIN1 = VIN2 = 13.5V
RDS(ON)
900
m
Boost Regulator Recommended Output Capacitor
CBST
10
µF
Boost Regulator Recommended Output Capacitor Maximum ESR
ESRCBST
100
m
Notes
13.
Design information only. It is not production tested.
14.
All internal high level voltages are reference to the VDDI voltage.
15.
When the input is above 8 V an integrated linear regulator will provide VBST; under this configuration the external inductor must be
removed and the VBD pin left open (floating).
16.
Guaranteed by design.
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions -40°C TJ 85°C unless otherwise noted. Input voltages 2.8 V VIN 13.5 V. Typical
values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit


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