AOZ1210
Rev. 1.7 December 2009 www.aosmd.com Page 4 of 14
Electrical Characteristics
T
A
= 25°C, V
IN
= V
EN
= 12V, V
OUT
= 3.3V unless otherwise specified
(3
)
Note:
3. Specification in BOLD indicate an ambient temperature range of -40°C to +85°C. These specifications are guaranteed by design.
Symbol Parameter Conditions Min. Typ. Max. Units
V
IN
Supply Voltage 4.5 27 V
V
UVLO
Input Under-Voltage Lockout Threshold V
IN
Rising
V
IN
Falling
4.3
4.1
V
I
IN
Supply Current (Quiescent) I
OUT
= 0, V
FB
= 1.2V, V
EN
> 2V 23mA
I
OFF
Shutdown Supply Current V
EN
= 0V 320µA
V
FB
Feedback Voltage 0.782 0.8 0.818 V
Load Regulation 0.5 %
Line Regulation 0.08 % / V
I
FB
Feedback Voltage Input Current 200 nA
ENABLE
V
EN
EN Input Threshold Off Threshold
On Threshold 2.5
0.6
V
V
HYS
EN Input Hysteresis 200 mV
MODULATOR
f
O
Frequency 315 370 425 kHz
D
MAX
Maximum Duty Cycle 85 %
D
MIN
Minimum Duty Cycle 6%
G
VEA
Error Amplifier Voltage Gain 500 V / V
G
EA
Error Amplifier Transconductance 200 µA / V
PROTECTION
I
LIM
Current Limit 2.5 5.0 A
Over-Temperature Shutdown Limit T
J
Rising
T
J
Falling
145
100
°C
f
SC
Short Circuit Hiccup Frequency V
FB
= 0V 24 kHz
t
SS
Soft Start Interval 4ms
PWM OUTPUT STAGE
R
DS(ON)
High-Side Switch On-Resistance 70 100 mΩ
High-Side Switch Leakage V
EN
= 0V, V
LX
= 0V 10 µA
