201983B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 25, 2013
DATA SHEET
AAT1143
1MHz 400mA Step-Down Converter
Absolute Maximum Ratings
1
Symbol
V
IN
V
LX
V
OUT
V
EN
T
J
T
LEAD
Description
Input Voltage GND
LX to GND
OUT to GND
EN to GND
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
6.0
-0.3 to V
P
+ 0.3
-0.3 to V
P
+ 0.3
-0.3 to 6.0
-40 to 150
300
Units
V
V
V
V
°C
°C
Thermal Information
Symbol
P
D
JA
Description
Maximum Power Dissipation (SC70JW-8)
Thermal Resistance
2
(SC70JW-8)
Value
625
160
Units
mW
°C/W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
201983B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 25, 2013
3
DATA SHEET
AAT1143
1MHz 400mA Step-Down Converter
Electrical Characteristics
1
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C, V
IN
= 3.6V.
Symbol
Description
Conditions
Min
2.7
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0 to 400mA, V
IN
= 2.7V to 5.5V
Fixed Output Version
Adjustable Output Version
2
No Load, 0.6V Adjustable Version
EN = AGND = PGND
100
1.8
-3.0
0.6
0.6
25
600
0.45
0.40
V
IN
= 5.5V, V
LX
= 0 to V
IN
, EN = GND
V
IN
= 2.7V to 5.5V
0.6V Output, No Load, T
A
= 25°C
0.6V Output
>0.6V Output
T
A
= 25°C
1
0.2
615
0.2
1.5
+3.0
4.0
2.5
50
1.0
Typ
Max
5.5
2.6
Units
V
V
mV
V
%
V
μA
μA
mA
μA
%/V
mV
μA
k
MHz
°C
°C
V
V
μA
Step-Down Converter
Input Voltage
V
IN
V
UVLO
V
OUT
V
OUT
I
Q
I
SHDN
I
LIM
R
DS(ON)H
R
DS(ON)L
I
LXLEAK
V
Linereg
V
OUT
I
OUT
R
OUT
F
OSC
T
SD
T
HYS
EN
V
EN(L)
V
EN(H)
I
EN
UVLO Threshold
Output Voltage Tolerance
Output Voltage Range
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
LX Leakage Current
Line Regulation
Out Threshold Voltage Accuracy
Out Leakage Current
Out Impedance
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
597
250
0.7
600
1.0
140
15
0.6
V
IN
= V
FB
= 5.5V
1.4
-1.0
1.0
1. The AAT1143 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.
2. For adjustable version with higher than 2.5V output, please consult your Skyworks representative.
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