AAT1149A Datasheet, PDF (4/17 Pages) Advanced Analogic Technologies – 2.2MHz Fast Transient 400mA Step-Down Converter

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PRODUCT DATASHEET
AAT1149A
2.2MHz 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
Step-Down Converter
V_IN
Input Voltage
V_OUT
Output Voltage Tolerance
I_Q
I_SHDN
I_LIM
R_DS(ON)H
R_DS(ON)L
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
I_LXLEAK
ΔV_Linereg
T_S
F_OSC
T_SD
T_HYS
LX Leakage Current
Line Regulation
Start-Up Time
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
EN
V_EN(L)
V_EN(H)
I_EN
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
I_OUT = 0 to 400mA, V_IN = 2.7V to 5.5V
No Load
V_EN = GND
V_IN = 5.5V, V_LX = 0 to V_IN, V_EN = GND
V_IN = 2.7V to 5.5V
From Enable to Output Regulation
T_A = 25°C
V_IN = V_OUT = 5.5V
Min Typ Max Units
2.2
5.5
-3.0
3.0
3
6
1.0
600
0.40
0.35
1
0.1
70
2.2
140
15
0.6
1.4
-1.0
1.0
V
%
mA
μA
mA
Ω
Ω
μA
%/V
μs
MHz
°C
°C
V
V
μA
1. The AAT1149A is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and cor-
relation with statistical process controls.
4
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1149A.2008.08.1.1