AAT1171 Datasheet, PDF (4/22 Pages) Advanced Analogic Technologies – 600mA Voltage-Scaling Step-Down Converter for RF Power Amplifiers with Bypass Switch

DATA SHEET
AAT1171
600mA Voltage-Scaling Step-Down Converter
for RF Power Amplifiers with Bypass Switch
Electrical Characteristics¹
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
Description
Input Voltage
UVLO Threshold
UVLO Hysteresis
V_OUT Programmable Range
Input Voltage Range from DAC
I_Q
Quiescent Current
I_SHDN
Shutdown Current
I_LIM
R_DS(ON)H
P-Channel Current Limit
High Side Switch On Resistance
R_DS(ON)L
R_DS(ON)BP
Low Side Switch On Resistance
Bypass Switch Resistance
I_LXLEAK
∆V_OUT/
V_OUT
LX Leakage Current
Load Regulation
∆V_OUT/
V_OUT/∆V_IN
R_OUT
Line Regulation
Feedback Impedance
V_OUT
F_OSC
Output Voltage Accuracy
Oscillator Frequency
T_SD
Over-Temperature Shutdown Threshold
T_HYS
Over-Temperature Shutdown Hysteresis
I_LL
t_VOUTS
Light Load Load Current Threshold
Output Voltage Settling Time
PWM/Light Load/EN
V_EN(L) Enable Threshold Low
V_EN(H) Enable Threshold High
I_EN
Input Low Current
t_EN
Turn-On Enable Response Time
MODE/SYNC
F_MODE/SYNC Synchronization Frequency
V_MODE/
SYNC(H)
MODE/SYNC High Level Threshold
V_MODE/
SYNC(L)
MODE/SYNC Low Level Threshold
I_MODE/SYNC MODE/SYNC Low Current
DAC Input
Gain Output Voltage/DAC Voltage³
Conditions
V_IN Rising
No Load, Light Load
No Load, PWM, V_CC Bias Current
EN = AGND = PGND, MODE/SYNC = V_IN or
GND
T_A = 25°C
V_DAC = 1.3V or BYPASS = VIN
V_CC = 5.5V, V_LX = 0 to V_CC, EN = 0V
I_LOAD = 0 to 500mA
V_DAC = 0.6V, I_LOAD = 0
V_OUT = 0.6V to V_OUT(MAX), MODE/SYNC = V_IN
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 19.8MHz²
V_SYNC = GND or V_CC
Min
2.7
0.6
0.2
1.2
Typ
2.6
200
45
420
1.6
230
230
85
Max
5.5
3.6
1.2
70
1.0
1
0.5
Units
V
V
mV
V
V
μA
μA
A
mΩ
mΩ
mΩ
μA
%
0.2
170
1.746 1.8 1.854
2.0
140
15
100
30
%/V
kΩ
V
MHz
°C
°C
mA
μs
1.4
-1.0
0.6
V
V
1.0
μA
150
μs
50
19.8
V_IN-
0.4
0.4
-1.0
1.0
3
MHz
V
V
μA
V/V
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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
4
201999B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013