AAT1155
1MHz 2.5A Step-Down DC/DC Converter
Electrical Characteristics
V
IN
= V
CC
= V
P
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
V
IN
V
OUT
V
IL
V
IH
V
UVLO
V
UVLO(HYS)
I
Q
I
SHDN
I
LIM
R
DS(ON)L
η
∆V
OUT
(V
OUT
*∆V
IN
)
∆V
OUT
/V
OUT
F
OSC
T
SD
T
HYS
Description
Input Voltage Range
Output Voltage Tolerance
Input Low Voltage
Input High Voltage
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Quiescent Supply Current
Shutdown Current
Current Limit
High Side Switch On Resistance
Efficiency
Load Regulation
Line Regulation
Oscillator Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Conditions
V
IN
= V
OUT
+ 0.2 to 5.5V,
I
OUT
= 0.5A
Min Typ Max Units
2.7
-2.5
5.5
2.5
0.6
1.4
V
%
V
V
V
V
IN
Rising
V
IN
Falling
No Load, V
FB
= 0V
V
EN
= 0V, V
IN
= 5.5V
T
A
= 25°C
T
A
= 25°C
I
OUT
= 1.0A
I
LOAD
= 0A to 2.5A
V
IN
= 2.7V to 5.5V
T
A
= 25°C
2.5
1.2
250
630
4.4
mV
1000 µA
1.0
µA
A
60
mΩ
92
%
±2.3
%
0.75
%/V
1
MHz
140
°C
15
°C
4
1155.2005.11.1.6
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
