ACT412
Rev 1, 30-Oct-13
ABSOLUTE MAXIMUM RATINGSc
PARAMETER
VALUE
-0.3 to + 6
-0.3 to + 22
0.45
UNIT
V
FB, CS, COMP to GND
VDD, GATE to GND
V
Maximum Power Dissipation (SOT23-6)
Operating Junction Temperature
Junction to Ambient Thermal Resistance (θJA)
Operating Junction Temperature
Storage Temperature
W
-40 to 150
220
˚C
˚C/W
˚C
-40 to 150
-55 to 150
300
˚C
Lead Temperature (Soldering, 10 sec)
˚C
c: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods.
ELECTRICAL CHARACTERISTICS
(VDD = 18V, LM = 0.5mH, RCS = 0.75Ω, VOUT = 13V, NP = 68, NS =12, NA = 17, TA = 25°C, unless otherwise specified,12V0.4A applica-
tion)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Supply
VDD Turn-On Voltage
VDDON
VDDOFF
VDDOVP
IDDST
VDD Rising from 0V
11.11 12.35 13.58
V
V
VDD Turn-Off Voltage
VDD Falling after Turn-on
VDD Rising from 0V
4.8
5.4
20.5
5
6
VDD Over Voltage Protection
Start Up Supply Current
18.45
22.55
10
V
VDD = 11V, before VDD Turn-on
µA
VDD = 12V, after VDD Turn-on (no
switching)
IDD Supply Current
IDD
IDD
0.55
0.25
1
mA
mA
VDD = 12V, after VDD Turn-on,
fault = 1
IDD Supply Current at Fault Mode
Feedback
Effective FB Reference Voltage
VFBREF
TFB_BLK
2.23
0.38
1.1
2.25
0.45
1.3
2.28
0.52
1.5
V
Light load
µs
µs
µs
µs
µA
FB Sampling Blanking Time
Heavy Load
FB sampling
0.5
0.65
0.25
0.75
0.29
1
Time needed for FB Sampling
(After blanking)
TFB_SAMP
IBVFB
CC and Knee point detecting
VFB = 3V
0.22
FB Leakage Current
Current Limit
VCSLIM1
VCSLIM2
VOUT = 12V
VOUT = 6V
0.5
V
V
CS Current Limit Threshold
0.75
CS Minimum Current Limits
Threshold
VCSMIN
300
mV
CS to GATE Propagation Delay
60
ns
ns
ns
Light Load
150
636
Leading Edge Blanking Time
TCSBLANK
Heavy Load
Innovative PowerTM
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