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APW7057 Datasheet(PDF) 3 Page - Anpec Electronics Coropration

Part # APW7057
Description  High Power Step-Down Synchronous DC/DC Controller
PDF  15 Pages
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Manufacturer  ANPEC [Anpec Electronics Coropration]
Direct Link  http://www.anpec.com.tw
Logo ANPEC - Anpec Electronics Coropration

APW7057 Datasheet(HTML) 3 Page - Anpec Electronics Coropration

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Copyright
© ANPEC Electronics Corp.
Rev. A.5 - Jun., 2008
APW7057
www.anpec.com.tw
3
Electrical Characteristics
Unless otherwise specified, these specifications apply over V
CC=5V, VBOOT=12V and TA= 0~70
oC. Typical values are
at T
A
=25oC.
APW7057
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
SUPPLY CURRENT
IVCC
VCC Nominal Supply Current
UGATE and LGATE Open
-
2.1
-
mA
IBOOT
BOOT Nominal Supply Current
UGATE Open
-
2.1
-
mA
UNDER VOLTAGE LOCKOUT (UVLO)
Rising VCC Threshold
4.0
4.2
4.4
V
Falling VCC Threshold
3.8
4.0
4.2
V
OSCILLATOR
FOSC
Free Running Frequency
250
300
340
kHz
Ramp Upper Threshold
-
2.85
-
V
Ramp Lower Threshold
-
0.95
-
V
∆V
OSC
Ramp Amplitude
-
1.9
-
VP-P
REFERENCE VOLTAGE
VREF
Reference Voltage
-
0.8
-
V
Reference Voltage Accuracy
-1.5
-
+1.5
%
ERROR AMPLIFIER
DC Gain
-
75
-
dB
FP
First Pole Frequency
-
10
-
Hz
FZ
First Zero Frequency
-
1
-
kHz
UGATE Duty Range
0
-
100
%
FB Input Current
-
-
0.1
µA
PWM CONTROLLER GATE DRIVERS
UGATE Source
VUAGTE=1V
-
0.6
-
A
UGATE Sink
VUGATE=1V
-
7.3
-
Ω
LGATE Source
VLGATE=1V
-
0.6
-
A
LGATE Sink
VLGATE=1V
-
1.8
-
Ω
TD
Dead Time
-
50
-
nS
PROTECTION
IOCSET
OCSET Sink Current
VOCSET=4.5V
34
40
46
µA
UVFB
FB Under-Voltage Level
FB falling
-
0.5
-
V
FB Under-Voltage Hysteresis
-
15
-
mV



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