AAT2148 Datasheet, PDF (4/18 Pages) Skyworks Solutions Inc. – Low-Noise, Fast Transient 1A Step-Down Converter

DATA SHEET
AAT2148
Low-Noise, Fast Transient 1A Step-Down Converter
Electrical Characteristics¹
T_A = -40°C to +85°C, unless otherwise noted. Typical values are T_A = 25°C, V_IN = 3.6V.
Symbol Description
Step-Down Converter
V_IN
Input Voltage
V_UVLO
UVLO Threshold
V_OUT
V_OUT
I_Q
I_SHDN
I_LIM
R_DS(ON)H
R_DS(ON)L
V_Linereg
V_FB
I_FB
T_S
F_OSC
T_SD
T_HYS
EN
V_EN(L)
V_EN(H)
I_EN
Output Voltage Tolerance
Output Voltage Range
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Line Regulation
Feedback Threshold Voltage Accuracy
Feedback Leakage Current
Start-Up Time
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
V_IN Rising
Hysteresis
I_OUT = 0mA to 1A, V_IN = 2.7V to 5.5V
No Load, 0.6V Adjustable Version
EN = AGND = PGND
V_IN = 2.7V to 5.5V; I_OUT = 1A
0.6V Output, No Load; T_A = 25°C
0.6V Output
From Enable to Output Regulation
T_A = 25°C
V_IN = V_OUT = 5.5V
Min Typ Max Units
2.7
-3.0
0.6
1300
591
0.9
1.8
100
37
1700
0.35
0.30
0.1
600
150
2.0
140
15
5.5
2.7
+3.0
V_IN
70
1.0
609
1
2.6
V
V
mV
%
V
μA
μA
mA


%/V
mV
μA
μs
MHz
°C
°C
1.4
-1.0
0.6
V
V
1.0
μA
1. The AAT2148 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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
4
202009A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 28, 2012