1MHz 3A Buck DC/DC Converter
Electrical Characteristics
values are at T
A
= 25°C)
Symbol
V
IN
V
OUT
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
V
EN(L)
V
EN(H)
T
SD
T
HYS
AAT1154
(V
IN
= V
CC
= V
P
= 5V, T
A
= -40 to 85°C unless otherwise noted. Typical
Description
Input Voltage Range
Output Voltage Tolerance
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
Enable Threshold Low
Enable Threshold High
Over Temp Shutdown Threshold
Over Temp Shutdown Hysteresis
Conditions
V
IN
= V
OUT
+ 0.2 to 5.5V,
I
OUT
= 0 to 3A
V
IN
Rising
V
IN
Falling
No Load, V
FB
= 0 V
V
EN
= 0 V, V
IN
= 5.5V
T
A
= 25°C
T
A
= 25°C
I
OUT
= 1.0 A
I
LOAD
= 0 - 3A
V
IN
= 2.7 to 5.5V
T
A
= 25°C
Min Typ Max Units
2.7
-5.0
5.5
5.0
2.5
1.2
250
630
4.4
60
92
±2.6
0.75
1
0.6
1.4
140
15
1000
1.0
V
%
V
V
mV
µA
µA
A
mΩ
%
%/V
MHz
V
V
°C
°C
4
1154.2003.08.0.91
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
