ACT4070B Ver la hoja de datos (PDF) - Active-Semi, Inc
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ACT4070B Datasheet PDF : 9 Pages
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ABSOLUTE MAXIMUM RATINGSc
ACT4070B
Rev 0, 23-Apr-12
PARAMETER
VALUE
UNIT
IN to GND
-0.3 to + 34
V
EN to GND
SW to GND
BS to SW
-0.3 to VIN + 0.3
V
-1 to VIN + 1
V
-0.3 to + 7
V
FB, COMP to GND
-0.3 to 6
V
Continuous SW Current
Internally limited
A
Junction to Ambient Thermal Resistance (θJA)
Maximum Power Dissipation
46
°C/W
1.8
W
Operating Junction Temperature
-40 to 150
°C
Storage Temperature
-55 to 150
°C
Lead Temperature (Soldering, 10 sec)
300
°C
c: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may
affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = 12V, TA= 25°C, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage
VIN UVLO Turn-on Voltage
Feedback Voltage
High-Side Switch On Resistance
Low-Side Switch On Resistance
SW Leakage
High-Side Switch Peak Current
Limit
VIN
VFB
RONH
RONL
ILIM
VOUT = 2.5V, ILOAD = 0A to 3A
Input Voltage Rising
VEN = 0, VIN = 12V, VSW = 0V
Duty Cycle = 50%
6.5
30 V
5.5
V
0.792 0.808 0.824 V
130
mΩ
7.9
Ω
1
10 µA
3.7
A
COMP to Current Limit Transcon-
ductance
GCOMP
ΔILOAD/ΔICOMP
5.25
A/V
Error Amplifier Transconductance
Error Amplifier DC Gain
Switching Frequency
Short Circuit Switching Frequency
Maximum Duty Cycle
Minimum on Time
GEA
AVEA
fSW
DMAX
ΔICOMP = ±10µA
VFB = 0V
650
µA/V
4000
V/V
250 300 330 kHz
44
kHz
88
%
200
ns
Enable Threshold Voltage
Hysteresis = 0.1V
1.47 1.6 1.73 V
Enable Pull Up Current
Pin pulled up to VIN when left uncon-
nected
4
µA
Supply Current in Shutdown
IC Supply Current in Operation
Thermal Shutdown Temperature
VEN = 0
VFB = 1.2V, not switching
Hysteresis = 20°C
75 115 µA
0.675 1 mA
150
°C
Innovative PowerTM
-3-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
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