201992D • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2016
1
DATA SHEET • AAT1153: 2 A STEP-DOWN CONVERTER
EN
IN
AIN
AGND
FB/OUT
1
2
3
4
5
10
9
8
7
6
201992-002
PGND
PGND
LX
LX
AGND
Figure 2. AAT1153 Pinout
(Top View)
Table 1. AAT1153 Signal Descriptions
Pin
1
2
3
4, 6
5
7, 8
9, 10
EN
IN
AIN
AGND
FB/OUT
LX
PGND
EP
Name
Description
Enable pin. Active high. In shutdown, all functions are disabled drawing < 1
A
supply current. Do not leave EN floating.
Power supply input pin. Must be closely decoupled to AGND with a 2.2
F
or greater ceramic capacitor.
Analog supply input pin. Provides bias for internal circuitry.
Analog ground pin.
Feedback input. Connect FB to the center point of the external resistor divider. The feedback threshold voltage is 0.6 V.
Switching node pin. Connect the output inductor to this pin.
Power ground pin.
Power ground exposed pad. Must be connected to bare copper ground plane.
September 2, 2016 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201992D
DATA SHEET • AAT1153: 2 A STEP-DOWN CONVERTER
Electrical and Mechanical Specifications
The absolute maximum ratings of the AAT1153 are provided in
Table 2, and electrical specifications are provided in Table 3.
Typical performance characteristics of the AAT1153 are illustrated
in Figures 3 through 21.
Table 2. AAT1153 Absolute Maximum Ratings
1
Parameter
Input supply voltages
FB, LX voltages
EN voltage
Ground
voltages
Operating temperature range
Storage temperature
Lead temperature (soldering, 10 s)
Thermal resistance
2,3
Thermal dissipation at T
A
= 25 °C
V
IN
, V
AIN
V
FB
, V
LX
V
EN
PGND, AGND
T
A
T
STG
T
LEAD
JA
P
D
Symbol
Minimum
0.3
0.3
0.3
0.3
40
65
Maximum
+6.0
V
IN
+ 0.3
V
IN
+ 0.3
+6.0
+85
+150
300
45
2.2
Units
V
V
V
V
ºC
ºC
ºC
ºC/W
W
1 Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set
at or below their nominal value. Exceeding any of the limits listed may result in permanent damage to the device.
2 T
J
is calculated from the ambient temperature T
A
and power dissipation P
D
according to the following formula: T
J
= T
A
+ P
D
JA
.
3 Thermal Resistance is specified with approximately 1 square inch of 1 oz. copper.
ESD HANDLING:
Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device.
This device must be protected at all times from ESD when handling or transporting. Static charges may easily produce
potentials of several kilovolts on the human body or equipment, which can discharge without detection.
Industry-standard ESD handling precautions should be used at all times.
201992D • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2016
3
DATA SHEET • AAT1153: 2 A STEP-DOWN CONVERTER
Table 3. AAT1153 Electrical Specifications
1
(V
IN
= 3.6 V, T
A
= –40
C
to +85C, Typical Values are T
A
= 25
C,
Unless Otherwise Noted)
Parameter
Input voltage range
2
Output voltage range
Input DC supply current
Feedback input bias current
Regulated feedback voltage
3
V
IN
V
OUT
Active mode: V
FB
= 0.5 V
I
Q
I
FB
Shutdown mode: V
EN
= 0 V, V
AIN
= 5.5 V
V
FB
= 0.65 V
T
A
= 25°C
V
FB
V
LINEREG
/V
IN
V
LOADREG
/I
OUT
V
FB
f
OSC
t
STUP
T
SD
_
THR
T
SD
_
HYS
I
LIM
R
DS
(
ON
)_
P
R
DS
(
ON
)_
N
V
EN
_
L
V
EN
_
H
I
IN
_
L
V
IN
= V
EN
= 5.5 V
1.5
−1.0
1.0
V
IN
= 3.6 V
V
IN
= 3.6 V
2.5
0
C
T
A
85
C
−40
C
T
A
85
C
Line regulation
Load regulation
Output voltage accuracy
Oscillator frequency
Startup time
Over-temperature shutdown threshold
Over-temperature shutdown hysteresis
Peak switch current
P-CH MOSFET
N-CH MOSFET
Enable threshold low
Enable threshold high
Input low current
V
IN
= 2.5 to 5.5 V, I
OUT
= 10 mA
I
OUT
= 10 mA to 2 A
V
IN
= 2.5 to 5.5 V, I
OUT
= 10 mA to 2 A
V
FB
= 0.6 V
From enable to output regulation
−3
0.96
1.2
1.3
170
10
3.5
135
95
200
150
0.3
0.5880
0.5865
0.5850
0.6000
0.6000
0.6000
0.10
0.20
+3
1.44
Symbol
Test Condition
Min
2.5
0.6
300
0.1
Typical
Max
5.5
V
IN
500
1
30
0.6120
0.6135
0.6150
0.20
Units
V
V
A
A
nA
V
V
V
%/V
%/A
% V
OUT
MHz
ms
C
C
A
m
m
V
V
A
1 The AAT1153 is guaranteed to meet performance specifications over the −40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with
statistical process controls.
2 V
IN
should be not less than V
OUT
+ V
DROPOUT
, where V
DROPOUT
= I
OUT
x (R
DS
(
ON
)
_
P
+ ESR
INDUCTOR
, typically V
DROPOUT
= 0.3 V.
3 The regulated feedback voltage is tested in an internal test mode that connects V
September 2, 2016 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201992D
201992D • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2016
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