AAT1146 Datasheet, PDF (4/20 Pages) Advanced Analogic Technologies – Fast Transient 400mA Step-Down Converter

DATA SHEET
AAT1146
Fast Transient 400mA 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
I_LXLEAK
V_Linereg
V_OUT
I_OUT
R_OUT
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
LX Leakage Current
Line Regulation
Out Threshold Voltage Accuracy
Out Leakage Current
Out Impedance
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
V_IN Falling
I_OUT = 0 to 400mA, V_IN = 2.7V to 5.5V
No Load, 0.6V Adjustable Version
EN = AGND = PGND
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
>1.0V Output²
From Enable to Output Regulation
T_A = 25°C
V_IN = V_OUT = 5.5V
Min Typ Max Units
2.7
1.8
-3.0
0.6
600
591
250
1.0
100
27
0.45
0.40
0.1
600
150
1.4
140
15
5.5
2.7
+3.0
V_IN
70
1.0
1
609
0.2
2.0
V
V
mV
V
%
V
μA
μA
mA


μA
%/V
mV
μA
k
μs
MHz
°C
°C
1.4
-1.0
0.6
V
V
1.0
μA
1. The AAT1146 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. The AAT1146 fixed output versions have the output set to different voltages.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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201985B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013