201999B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013
DATA SHEET
AAT1171
600mA Voltage-Scaling Step-Down Converter
for RF Power Amplifiers with Bypass Switch
Absolute Maximum Ratings
1
Symbol
V
CC
, V
IN
V
LX
V
OUT
V
N
T
J
T
LEAD
Description
Input Voltage and Bias Power to GND
LX to GND
VOUT to GND
EN, DAC, BYPASS, MODE/SYNC to GND
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
6.0
-0.3 to V
IN
+ 0.3
-0.3 to V
IN
+ 0.3
-0.3 to 6.0
-40 to 150
300
Units
V
V
V
V
°C
°C
Thermal Information
2
Symbol
P
D
θ
JA
Description
Maximum Power Dissipation, T
A
= 25°C
Thermal Resistance, T
A
= 25°C
TDFN33-12
2, 3
WLCSP-12
2, 4
TDFN33-12
WLCSP-12
Value
2.0
0.88
50
114
Units
W
°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.
2. Mounted on FR4 board; for the WLCSP package, use the NSMD (none-solder mask defined) pad style for tighter control on the copper etch process.
201999B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013
3
DATA SHEET
AAT1171
600mA Voltage-Scaling Step-Down Converter
for RF Power Amplifiers with Bypass Switch
Electrical Characteristics
1
T
A
= -40°C to +85°C, unless otherwise noted. V
IN
= V
CC
= 3.6V; typical values are T
A
= 25°C.
Symbol
V
IN
V
UVLO
V
OUT
V
DACIN
I
Q
I
SHDN
I
LIM
Description
Input Voltage
UVLO Threshold
UVLO Hysteresis
V
OUT
Programmable Range
Input Voltage Range from DAC
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Bypass Switch Resistance
LX Leakage Current
Conditions
V
IN
Rising
Min
2.7
Typ
2.6
200
Max
5.5
Units
V
V
mV
V
V
μA
μA
A
mΩ
mΩ
mΩ
μA
%
%/V
kΩ
V
MHz
°C
°C
mA
μs
V
V
μA
μs
0.6
0.2
No Load, Light Load
No Load, PWM, V
CC
Bias Current
EN = AGND = PGND, MODE/SYNC = V
IN
or
GND
T
A
= 25°C
45
420
3.6
1.2
70
1.0
1.2
R
DS(ON)H
R
DS(ON)L
R
DS(ON)BP
I
LXLEAK
∆V
OUT
/
Load Regulation
V
OUT
∆V
OUT
/
Line Regulation
V
OUT
/∆V
IN
R
OUT
Feedback Impedance
V
OUT
Output Voltage Accuracy
F
OSC
Oscillator Frequency
T
SD
Over-Temperature Shutdown Threshold
T
HYS
Over-Temperature Shutdown Hysteresis
I
LL
Light Load Load Current Threshold
t
VOUTS
Output Voltage Settling Time
PWM/Light Load/EN
Enable Threshold Low
V
EN(L)
V
EN(H)
Enable Threshold High
I
EN
Input Low Current
t
EN
Turn-On Enable Response Time
V
DAC
= 1.3V or BYPASS = VIN
V
CC
= 5.5V, V
LX
= 0 to V
CC
, EN = 0V
I
LOAD
= 0 to 500mA
1.6
230
230
85
1
0.5
0.2
V
DAC
= 0.6V, I
LOAD
= 0
1.746
170
1.8
2.0
140
15
100
1.854
V
OUT
= 0.6V to V
OUT(MAX)
, MODE/SYNC = V
IN
30
0.6
V
CC
= 5.5V
AAT1171-1: EN = Low to High, MODE/SYNC
= High, V
DAC
= 1.2V
AAT1171-4/AAT1171-5: EN = Low to High,
MODE/SYNC = High, V
DAC
= 1.2V
Sync to 19.8MHz
2
1.4
-1.0
150
50
19.8
V
IN
-
0.4
1.0
MODE/SYNC
F
MODE/SYNC
Synchronization Frequency
V
MODE/
MODE/SYNC High Level Threshold
SYNC(H)
MHz
V
0.4
V
μA
V/V
V
MODE/
SYNC(L)
MODE/SYNC Low Level Threshold
V
SYNC
= GND or V
CC
-1.0
3
I
MODE/SYNC
MODE/SYNC Low Current
DAC Input
Gain
Output Voltage/DAC Voltage
3
1.0
1. The AAT1171 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. Please contact Sales for other synchronization frequencies.
3. Please contact Sales for other output voltage/DAC voltage gains.
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