Block Diagram
AOZ1020
VIN
EN
UVLO
5V LDO
Internal
OTP
& POR
Regulator
+5V
Reference
& Bias
Softstart
0.8V
FB
+
EAmp
–
COMP
PGOOD
0.2V
Frequency
Foldback
+ Comparator
–
0.72V +
–
+
– PWM
Comp
+
ILimit
PWM
Control
Logic
Oscillator
+
ISen
–
Level
Shifter
+
FET
Driver
AGND
Q1
LX
Q2
PGND
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the device.
Parameter
Rating
Supply Voltage (VIN)
LX to AGND
EN to AGND
FB to AGND
COMP to AGND
PGND to AGND
PGOOD to AGND
Junction Temperature (TJ)
Storage Temperature (TS)
ESD Ratingl(1)
18V
-0.7V to VIN+0.3V
-0.3V to VIN+0.3V
-0.3V to 6V
-0.3V to 6V
-0.3V to 0.3V
-0.3V to 6.0V
+150°C
-65°C to +150°C
2.0kV
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 Recom-
mended Operating Conditions.
Parameter
Rating
Supply Voltage (VIN)
Output Voltage Range
Ambient Temperature (TA)
Package Thermal Resistance (ΘJA)(2)
SO-8
4.5V to 16V
0.8V to VIN
-40°C to +85°C
87°C/W
Package Thermal Resistance (ΘJC)
SO-8
30°C/W
Package Power Dissipation (PD)
@25°C Ambient
SO-8
1.15W
Note:
2. The value of ΘJA is measured with the device mounted on 1-in2
FR-4 board with 2oz. Copper, in a still air environment with TA =
25°C. The value in any given application depends on the user's spe-
cific board design.
Rev. 1.5 December 2010
www.aosmd.com
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