ACT4082A
Active- Semi
Rev0, 16-May-08
ABSOLUTE MAXIMUM RATINGSc
PARAMETER
IN Supply Voltage
VALUE
UNIT
V
-0.3 to 20
-1 to VIN + 1
SW - 0.3 to VSW + 7
-0.3 to 6
SW Voltage
V
BST Voltage
V
V
EN, FB Voltage
V
Continuous SW Current
Internally Limited
220
A
Junction to Ambient Thermal Resistance (θJA)
Maximum Power Dissipation
Operating Junction Temperature
Storage Temperature
°C/W
W
0.5
-40 to 150
-55 to 150
300
°C
°C
°C
Lead Temperature (Soldering, 10 sec)
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
VIN
TEST CONDITIONS
VOUT = 3.3V, ILOAD = 0A to 1.2A
Input Voltage Rising
MIN TYP MAX UNIT
Input Voltage
4.5
4
16
V
V
Under Voltage Lockout Voltage
Under Voltage Lockout Hysteresis
Feedback Voltage
VUVLO
4.2
250
0.81
250
0.300
15
4.49
mV
V
VFB
4.75V ≤ VIN ≤ 16V, VCOMP = 1.5V
0.78
0.84
Frequency Foldback Threshold
High-side Switch On Resistance
Low-side Switch On Resistance
SW Leakage
mV
Ω
RONH
RONH
Ω
VEN = 0, VSW = 0V
1
10
µA
VIN = 12V, VOUT = 5V, or
EN = G, SW = G
Current Limit
ILTM
fSW
1.8
A
Switching Frequency
1.1
1.4
467
92
1.7
MHz
kHz
%
Foldback Switching Frequency
Maximum Duty Cycle
VFB = 0V, or FB = G
VFB = 0.6V
DMAX
Minimum On-Time
75
ns
EN Threshold Voltage
EN Rising
EN Rising
1.12
1.24
100
2
1.36
V
EN Hysteresis
mV
µA
µA
mA
°C
EN Internal Pull-up Current
Supply Current in Shutdown
Supply Current in Operation
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V
EN = 0V or EN = G
EN = 2V, VFB = 1.0V
15
30
2
V
1
160
10
°C
Innovative PowerTM
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