AOZ1084DI Datasheet, PDF (3/12 Pages) Alpha & Omega Semiconductors – 1.2A Buck LED Driver

AOZ1084
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the
device.
Parameter
Rating
Supply Voltage (V_VIN)
LX to GND
DIM to GND
FB to GND
BST to GND
Junction Temperature (T_J)
Storage Temperature (T_S)
ESD Rating⁽¹⁾
40V
-0.7V to V_VIN+ 2V
-0.3V to 36V
-0.3V to 6V
V_LX + 6V
+150°C
-65°C to +150°C
2kV
Note:
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5kΩ in series with 100pF.
Recommended Operating Conditions
The device is not guaranteed to operate beyond the
Recommended Operating Conditions.
Parameter
Rating
Supply Voltage (V_VIN)
Output Voltage Range
Ambient Temperature (T_A)
Package Thermal Resistance (_JA)
DFN2x2-8L
4.5V to 36V
Up to 0.85 * V_VIN
-40°C to +85°C
55°C/W
Electrical Characteristics
T_A = 25°C, V_VIN = 12V, V_EN = 12V, unless otherwise specified. Specifications in BOLD indicate a temperature range of -40°C to
+85°C. These specifications are guaranteed by design.
Symbol
Parameter
V_VIN
V_UVLO
Supply Voltage
Input Under-Voltage Lockout Threshold
UVLO Hysteresis
I_VIN
I_OFF
V_FB
V_{FB_LOAD}
V_{FB_LINE}
I_FB
Supply Current (Quiescent)
Shutdown Supply Current
Feedback Voltage
Load Regulation
Line Regulation
Feedback Voltage Input Current
PWM DIMMING
V_{Dim_OFF}
V_{Dim_ON}
V_{Dim_HYS}
I_EN
Dimming Input Threshold
Dimming Input Hysteresis
Dimming Input Current
MODULATOR
f_O
D_MAX
T_{ON_MIN}
I_LIM
Frequency
Maximum Duty Cycle
Minimum On Time
Current Limit
Over-Temperature Shutdown Limit
T_SS Soft Start Interval
POWER STATE OUTPUT
R_DS(ON) NMOS On-Resistance
I_LEAKAGE NMOS Leakage
Conditions
V_VIN Rising
V_VIN Falling
I_OUT = 0, V_FB = 1V, V_EN > 1.2V
V_EN = 0V
T_A = 25ºC
120mA < Load < 1.08A
Load = 600mA
V_FB = 160mV
Off Threshold
On Threshold
T_J Rising
T_J Falling
V_IN = 12V
V_EN = 0V, V_LX = 0V
Min.
4.5
2.2
147
Typ.
200
1
160
0.5
0.03
100
Max.
36
2.9
1.5
8
173
Units
V
V
V
mV
mA
A
mV
%
%/V
nA
0.4
V
1.2
V
200
mV
3
A
360 450 540
kHz
87
%
150
ns
1.5
1.9
2.3
A
150
°C
110
°C
600
s
420
mΩ
10
A
Rev. 0.3 April 2012
www.aosmd.com
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