AAT1149 Datasheet, PDF (4/20 Pages) Advanced Analogic Technologies – 3MHz Fast Transient 400mA Step-Down Converter

AAT1149
3MHz Fast Transient
400mA Step-Down Converter
Electrical Characteristics¹
V_IN = 3.6V, T_A = -40°C to +85°C, unless otherwise noted. Typical values are T_A = 25°C.
Symbol Description
Conditions
Min
Step-Down Converter
V_IN
V_UVLO
Input Voltage
UVLO Threshold
V_OUT
V_OUT
I_Q
I_SHDN
I_LIM
R_DS(ON)H
R_DS(ON)L
I_LXLEAK
ΔV_Linereg
V_OUT
I_OUT
T_S
Output Voltage Tolerance
Adjustable 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
Start-Up Time
2.7
V_IN Rising
Hysteresis
V_IN Falling
1.8
I_OUT = 0 to 400mA,
-3.0
V_IN = 2.7V to 5.5V
1.0
No Load
V_EN = GND
600
V_IN = 5.5V, V_LX = 0 to V_IN,
V_EN = GND
V_IN = 2.7V to 5.5V
0.6V Output, No Load
T_A = 25°C
591
0.6V Output
From Enable to Output
Regulation
F_OSC
T_SD
T_HYS
EN
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
T_A = 25°C
V_EN(L)
V_EN(H)
I_EN
Enable Threshold Low
Enable Threshold High
Input Low Current
1.4
V_IN = V_OUT = 5.5V
-1.0
Typ
100
45
0.45
0.40
0.1
600
70
3.0
140
15
Max Units
5.5 V
2.7 V
mV
V
3.0 %
V_IN
V
70 μA
1.0 μA
mA
Ω
Ω
1
μA
%/V
609 mV
0.2 μA
μs
MHz
°C
°C
0.6 V
V
1.0 μA
1. The AAT1149 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.
4
1149.2006.11.1.0