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APW7085 Datasheet(PDF) 4 Page - Anpec Electronics Coropration

Part # APW7085
Description  2A, 26V, 380kHz, Asynchronous Step-Down Converter
PDF  24 Pages
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Manufacturer  ANPEC [Anpec Electronics Coropration]
Direct Link  http://www.anpec.com.tw
Logo ANPEC - Anpec Electronics Coropration

APW7085 Datasheet(HTML) 4 Page - Anpec Electronics Coropration

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Copyright
© ANPEC Electronics Corp.
Rev. A.7 - Sep., 2010
APW7085
www.anpec.com.tw
4
Electrical Characteristics (Cont.)
Refer to the typical application circuits. These specifications apply over V
IN=12V, VOUT=3.3V and TA= -40 ~ 85
oC, unless
otherwise specified. V
CC is regulated by an internal regulator. Typical values are at TA=25
oC.
APW7085
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
POWER-ON-RESET (POR) AND LOCKOUT VOLTAGE THRESHOLDS (CONT.)
VIN-to-UGND Lockout Voltage
Threshold
VVIN-UGND rising
-
3.5
-
V
VIN-to-UGND Lockout Hysteresis
-
0.2
-
V
REFERENCE VOLTAGE
VREF
Reference Voltage
-
0.8
-
V
TJ = 25
oC, I
OUT=0A, VIN=12V
-1.0
-
+1.0
Output Voltage Accuracy
TJ = -40 ~ 125
oC, I
OUT = 0 ~ 2A,
VIN = 4.5 ~ 26V
-2.5
-
+2.5
%
Line Regulation
VIN = 4.5V to 26V, IOUT = 0A
-
0.36
-
%
Load Regulation
IOUT = 0 ~ 2A
-
0.4
-
%
OSCILLATOR AND DUTY
FOSC
Free Running Frequency
VIN = 4.5 ~ 26V
340
380
420
kHz
Foldback Frequency
VFB = 0V
-
80
-
kHz
Maximum Converter’s Duty Cycle
-
93
-
%
Minimum Pulse Width of LX
VIN = 4.5 ~ 26V
-
200
-
ns
CURRENT-MODE PWM CONVERTER
Gm
Error Amplifier Transconductance
-
400
-
µA/V
Error Amplifier DC Gain
COMP = Open
60
80
-
dB
Current-Sense Resistance
-
0.2
-
Ω
P-Channel Power MOSFET
Resistance
TJ=25
oC
-
100
140
m
Ω
PROTECTIONS
ILIM
P-Channel Power MOSFET
Current-limit
Peak Current
3
4
5
A
VUV
FB Under-Voltage Threshold
VFB falling
66
70
74
%
FB Under-Voltage Hysteresis
-
40
-
mV
FB Under-Voltage Debounce
-
2
-
µs
TOTP
Over-Temperature Trip Point
-
150
-
oC
Over-Temperature Hysteresis
-
50
-
oC
SOFT-START, ENABLE AND INPUT CURRENTS
tSS
Soft-Start Interval
9
10.8
12
ms
Preceding Delay before Soft-Start
9
10.8
12
ms
EN Shutdown Voltage Threshold
VEN falling, VIN = 4 ~ 26V
-
-
0.8
V
EN Enable Voltage Threshold
VEN rising, VIN = 4 ~ 26V
2.1
-
-
V
EN Pin Clamped Voltage
IEN=10mA
12
-
17
V
P-Channel Power MOSFET
Leakage Current
VEN = 0V, VLX = 0V, VIN = 26V
-
-
4
µA



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