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34702 Datasheet(PDF) 9 Page - Freescale Semiconductor, Inc

Part # 34702
Description  3.0 A Switch-Mode Power Supply with Linear Regulator
PDF  38 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

34702 Datasheet(HTML) 9 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
9
34702
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
ERROR AMPLIFIER (BUCK CONVERTER)
Input Impedance (11)
ROUT
–
150
–
Ω
Output Impedance (11)
AVOL
–
80
–
dB
DC Open Loop Gain (11)
GBW
–
35
–
MHz
Gain Bandwidth Product (11)
SR
–
200
–
V/
µs
Slew Rate (11)
VEA_OH
–2.0
–
V
Output Voltage – High Level
VIN1 > 3.3 V, IOEA = -1.0 mA (11), (12)
VEA_OL
–0.4
–
V
Output Voltage – Low Level
IOEA = -1.0 mA (11), (12)
VSCRamp
–0.5
–
V
Oscillator Ramp (11)
VSCRamp
–0.5
–
V
OSCILLATOR
CLKSYN Pin (open) Low Level Output Voltage
IOL = +1.0 mA (13)
VOSC_OL
––
0.4
V
CLKSYN Pin (open) High Level Output Voltage
IOH = -1.0 mA (14)
VOSC_OH
VDDI
-0.4 V
–
–
V
CLKSYN Pin (grounded) Input Voltage Threshold
VOSC_IH
1.2
–
2.0
V
CLKSYN Pin Pullup Resistance
RPU
60
–
240
k
Ω
Frequency Adjusting Reference Voltage
VFREQ
–1.26–
V
BOOST REGULATOR
Regulator Output Voltage
IBST = 20 mA, VIN1 = V
IN2 = 2.8 V to 6.0 V
VBST
7.3
7.7
8.3
V
Power MOSFET Q5 RDS(ON)(11)
IBD = 500 mA, TA = 25°C
RDS(ON)
–
650
1000
m
Ω
Regulator Recommended Output Capacitor
CBST
–
10
–
µF
Regulator Recommended Output Capacitor Maximum ESR
ESRCBST
–
100
–
m
Ω
Notes
11.
Design information only. This parameter is not production tested.
12.
IOEA Refers to Error Amplifier Output Current.
13.
IOL Refers to IO Low Level Threshold Voltage Current
14.
IOH Refers to IO High Level Threshold Voltage Current
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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