AOZ1280
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the
device.
Recommended Operating Conditions
The device is not guaranteed to operate beyond the
Recommended Operating Conditions.
Parameter
Supply Voltage (VIN)
Rating
Parameter
Supply Voltage (VIN)
Rating
30 V
3.0 V to 26 V
0.8 V to VVIN
LX to GND
-0.7 V to VVIN+ 2 V
-0.3 V to 26 V
-0.3 V to 6 V
VLX + 6 V
Output Voltage Range
EN to GND
Ambient Temperature (TA)
-40 °C to +85 °C
FB to GND
Package Thermal Resistance (JA)
SOT23-6L
220 °C/W
BST to AGND
Junction Temperature (TJ)
Storage Temperature (TS)
ESD Rating(1)
Note:
+150 °C
-65 °C to +150 °C
2 kV
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5 kΩ in series with 100 pF.
Electrical Characteristics
TA = 25 °C, VVIN = VEN = 12 V. Specifications in BOLD indicate a temperature range of -40 °C to +85 °C. These specifications are
guaranteed by design.
Symbol
Parameter
Supply Voltage
Conditions
Min.
3
Typ.
Max.
Units
VVIN
26
V
VUVLO
Input Under-Voltage Lockout Threshold
VVIN Rising
VVIN Falling
2.9
V
V
2.3
UVLO Hysteresis
200
mV
mA
A
IVIN
IOFF
VFB
Supply Current (Quiescent)
Shutdown Supply Current
Feedback Voltage
IOUT = 0, VFB = 1 V, VEN > 1.2 V
VEN = 0 V
1
1.5
8
TA = 25 ºC
784
800
0.5
816
mV
%
VFB_LOAD Load Regulation
VFB_LINE Line Regulation
120 mA < Load < 1.08 A
Load = 600 mA
0.03
500
% / V
nA
IFB
Feedback Voltage Input Current
VFB = 800 mV
ENABLE
VEN_OFF EN Input Threshold
VEN_ON
Off Threshold
On Threshold
0.4
V
V
1.2
VEN_HYS EN Input Hysteresis
200
mV
IEN
Enable Input Current
3
A
MODULATOR
fO
Frequency
Maximum Duty Cycle
1.2
1.5
1.5
87
100
2
1.8
MHz
%
DMAX
TON_MIN Minimum On Time
ns
ILIM
Current Limit
A
Over-Temperature Shutdown Limit
TJ Rising
TJ Falling
150
110
°C
°C
TSS
Soft Start Interval
400
s
POWER STATE OUTPUT
RDS(ON) NMOS On-Resistance
RDS(ON) NMOS On-Resistance
ILEAKAGE NMOS Leakage
VIN = 12 V
240
380
mꢀ
mꢀ
A
VIN = 3.3 V
VEN = 0 V, VLX = 0 V
10
Rev. 1.1 August 2011
www.aosmd.com
Page 3 of 13
AOS [ ALPHA & OMEGA SEMICONDUCTORS ]
