ACT4060
Rev8, 24-Jul-07
ABSOLUTE MAXIMUM RATINGS
PARAMETER
IN Supply Voltage
VALUE
UNIT
-0.3 to 25
V
SW Voltage
-1 to VIN + 1
VSW - 0.3 to VSW + 8
-0.3 to 6
V
V
BS Voltage
EN, FB, COMP Voltage
V
Continuous SW Current
Internally Limited
105
A
Junction to Ambient Thermal Resistance (θJA)
Maximum Power Dissipation
Operating Junction Temperature
Storage Temperature
°C/W
W
0.76
-40 to 150
-55 to 150
300
°C
°C
°C
Lead Temperature (Soldering, 10 sec)
: 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
Input Voltage
SYMBOL
VIN
TEST CONDITIONS
MIN
TYP
MAX UNIT
VOUT = 5V, ILOAD = 0A to 1A
7
20
V
V
Feedback Voltage
VFB
4.75V ≤ VIN ≤ 20V, VCOMP = 1.5V 1.267
1.293
0.20
4.7
1.319
High-Side Switch On Resistance
Low-Side Switch On Resistance
SW Leakage
RONH
RONL
Ω
Ω
VEN = 0
0
10
µA
A
Current Limit
ILIM
2.4
2.85
COMP to Current Limit
Transconductance
GCOMP
1.8
A/V
Error Amplifier Transconductance
Error Amplifier DC Gain
Switching Frequency
GEA
AVEA
fSW
ΔICOMP = ±10µA
550
4000
420
50
µA/V
V/V
kHz
kHz
%
350
490
Short Circuit Switching Frequency
Maximum Duty Cycle
VFB = 0
DMAX
VFB = 1.1V
VFB = 1.4V
90
Minimum Duty Cycle
0
%
Enable Threshold Voltage
Hysteresis = 0.1V
0.7
1
2
1.3
V
Pin pulled up to 4.5V typically
when left unconnected
Enable Pull-Up Current
µA
Supply Current in Shutdown
IC Supply Current in Operation
Thermal Shutdown Temperature
VEN = 0
8
20
µA
mA
°C
VEN = 3V, VFB = 1.4V
Hysteresis = 10°C
0.7
160
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