AOZ1232-01
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the
device.
Maximum Operating Ratings
The device is not guaranteed to operate beyond the
Maximum Operating ratings.
Parameter
Rating
Parameter
Supply Voltage (VIN)
Rating
IN, AIN, TON, PFM to AGND
LX to AGND
-0.3V to 30V
-2V to 30V
-0.3V to 36V
-0.3V to 6V
-0.3V to +0.3V
+150°C
2.7V(1) to 28V
0.8V to 0.85*VIN
-40°C to +85°C
Output Voltage Range
Ambient Temperature (TA)
Package Thermal Resistance
HS MOSFET
BST to AGND
SS, PGOOD, FB, EN to AGND
PGND to AGND
25°C/W
20°C/W
50°C/W
Junction Temperature (TJ)
Storage Temperature (TS)
ESD Rating(1)
LS MOSFET
-65°C to +150°C
2kV
PWM Controller
Note:
Note:
1. Connect VCC and AIN to external 5V for VIN = 2.7V ~ 6.5V
application.
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5k in series with 100pF.
2. LX to PGND Transient (t<20ns) ------ -7V to VIN + 7V.
Electrical Characteristics
TA = 25°C, VIN = 12V, EN = 5V, unless otherwise specified. Specifications in BOLD indicate a temperature range of -40°C to +85°C.
Symbol
Parameter
IN Supply Voltage
Conditions
Min.
2.7
Typ.
Max
Units
VIN
28
V
Vcc rising
Vcc falling
4.0
3.7
4.4
VUVLO
Under-Voltage Lockout Threshold of Vcc
V
3.2
Iq
Quiescent Supply Current of Vcc
Shutdown Supply Current
IOUT = 0, VFB = 1.0V, VEN > 2V
VEN = 0V
2
1
3
mA
IOFF
20
A
TA = 25°C
TA = 0°C to 85°C
0.792
0.788
0.800
0.800
0.808
0.812
VFB
Feedback Voltage
V
Load Regulation
Line Regulation
0.5
1
%
%
IFB
FB Input Bias Current
200
0.5
nA
Enable
Off threshold
On threshold
VEN
EN Input Threshold
EN Input Hysteresis
V
2.5
VEN_HYS
100
100
mV
PFM Control
PFM Mode threshold
Force PWM threshold
0.5
VPFM
PFM Input Threshold
PFM Input Hysteresis
V
2.5
VPFMHYS
mV
Modulator
R
TON = 100k, VIN = 12V
200
250
150
300
TON
On Time
ns
RTON = 100k, VIN = 24V
TON
_
Minimum On Time
Minimum Off Time
100
250
ns
ns
MIN
TOFF
_
MIN
Rev. 1.3 October 2012
www.aosmd.com
Page 5 of 18
AOS [ ALPHA & OMEGA SEMICONDUCTORS ]
