PRODUCT DATASHEET
AAT1160
SwitchRegTM
12V, 3A Step-Down DC/DC Converter
Electrical Characteristics1
4.0V < VIN < 13.2V. CIN = COUT = 22μF; L = 2.2μH or 3.8μH, TA = -40°C to +85°C, unless otherwise noted. Typical
values are at TA = 25°C.
Symbol Description
Conditions
Min
Typ
Max
Units
VIN
Input Voltage Range
4.0
13.2
4.0
V
Rising
VUVLO
Input Under-Voltage Lockout
V
Hysteresis
No Load
VEN = GND
0.3
150
IQ
ISHDN
Supply Current
Shutdown Current
300
1
μA
μA
0.94
VIN
2.5
VOUT
Output Voltage Range
Output Voltage Accuracy
Line Regulation
0.6
V
%
VOUT
ΔVLINEREG
ΔVIN
IOUT = 0A to 3A
-2.5
/
VIN = 4.5V to 13.2V
0.023 0.100
0.4
%/V
%
ΔVLOADREG
Load Regulation
Feedback Reference Voltage (adjustable
version)
VIN = 12V, VOUT = 5V, IOUT = 0A to 3A
No Load, TA = 25°C
VFB
0.59
0.60
0.61
0.2
V
Adjustable Version
VOUT = 1.2V
IFBLEAK
FB Leakage Current
μA
Fixed Version
2
FOSC
FSYNC
TS
PWM Oscillator Frequency
External Clock Frequency Range
Start-Up Time
0.6
0.5
0.8
1
1.6
MHz
MHz
ms
kHz
%
CMOS Logic Clock Signal on SYNC Pin
IOUT = 3A, VOUT = 5V
2
200
Foldback Frequency
DC
TON
TSS
Maximum Duty Cycle
Minimum Turn-On Time
Soft-Start Time
94
100
2
ns
ms
VIN = 12V
VIN = 6V
VIN = 12V
VIN = 6V
0.12
0.15
0.06
0.08
90
RDS(ON)H
RDS(ON)L
P-Channel On Resistance
N-Channel On Resistance
Ω
Ω
η
ILIM
ILXLEAK
TSD
THYS
VILEN
VIHEN
VILSYNC
VIHSYNC
IEN
Efficiency
PMOS Current Limit
LX Leakage Current
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
EN Logic Low Input Threshold
EN Logic High Input Threshold
SYNC Logic Low Input Threshold
SYNC Logic High Input Threshold
EN Input Current
VIN = 12V, VOUT = 5V, IOUT = 3A
%
A
μA
°C
°C
V
V
V
V
μA
4.0
1.4
6.0
VIN = 13.2V, VLX = 0 to VIN
1
140
25
0.4
0.4
1.0
1.62
-1.0
VEN = 0V, VEN = 13.2V
1. The AAT1160 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
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1160.2007.11.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
