PRODUCT DATASHEET
AAT1
149
SwitchReg
TM
Electrical Characteristics
1
V
IN
= 3.6V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
V
IN
V
UVLO
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
F
OSC
T
SD
T
HYS
EN
V
EN(L)
V
EN(H)
I
EN
3MHz Fast Transient 400mA Step-Down Converter
Description
Input Voltage
UVLO Threshold
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
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
Min
2.7
Typ
Max
5.5
2.7
Units
V
V
mV
V
%
V
μA
μA
mA
Ω
Ω
Step-Down Converter
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0 to 400mA, V
IN
= 2.7V to 5.5V
No Load
V
EN
= GND
600
SC70JW-8
WLCSP-5
SC70JW-8
WLCSP-5
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
0.6V Output
From Enable to Output Regulation
T
A
= 25°C
0.45
0.40
0.40
0.35
1
591
0.1
600
70
3.0
140
15
0.6
V
IN
= V
OUT
= 5.5V
1.4
-1.0
1.0
609
0.2
100
1.8
-3.0
1.0
45
3.0
V
IN
70
1.0
μA
%/V
mV
μA
μs
MHz
°C
°C
V
V
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 correla-
tion with statistical process controls.
4
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