ACT4012 查看數據表（PDF） - Unspecified
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ACT4012 Datasheet PDF : 9 Pages
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ACT4012
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device
reliability.)
PARAMETER
IN Supply Voltage
SW Voltage
BS Voltage
EN, FB, COMP Voltage
Continuous SW Current
Junction to Ambient Thermal Resistance (θ JA)
Maximum Power Dissipation
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
VALUE
UNIT
-0.3 to 25
V
-1 to VIN + 1
V
VSW – 0.3 to VSW + 8
V
-0.3 to 6
V
Internally limited
A
105
°C/W
0.76
W
-40 to 150
°C
-55 to 150
°C
300
°C
ELECTRICAL CHARACTERISTICS
(VIN = 12V, TA= 25°C unless otherwise specified.)
PARAMETER
Input Voltage
Feedback Voltage
High-Side Switch On Resistance
Low-Side Switch On Resistance
SW Leakage
Current Limit
COMP to Current Limit
Transconductance
Error Amplifier Transconductance
Error Amplifier DC Gain
Switching Frequency
Short Circuit Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Enable Threshold Voltage
Enable Pull Up Current
Supply Current in Shutdown
IC Supply Current in Operation
Thermal Shutdown Temperature
SYMBOL
TEST CONDITIONS
VIN VOUT = 5V, ILOAD = 0A to 1A
VFB 4.75V ≤ VIN ≤ 20V, VCOMP = 1.5V
RONH
RONL
VEN = 0
ILIM
GCOMP
GEA ΔICOMP = ±10µA
AVEA
fSW
VFB = 0
DMAX VFB = 1.1V
VFB = 1.4V
Hysteresis = 0.1V
Pin pulled up to 4.5V typically when
left unconnected
VEN = 0
VEN = 3V, VFB = 1.4V
Hysteresis = 10°C
MIN
7
1.267
2.4
350
0.7
TYP
1.293
0.4
10
0
2.85
1.8
550
4000
410
50
90
1
2
8
0.7
160
MAX UNIT
20 V
1.319 V
Ω
Ω
10 µA
A
A/V
µA/V
V/V
470 kHz
kHz
%
0
%
1.3 V
µA
20 µA
mA
°C
Active-Semi, Inc.
-3-
www.active-semi.com
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