600mA, 1MHz Step-Down Converter
Electrical Characteristics
1
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C, V
IN
= 3.6V.
Symbol
Description
Conditions
Min
2.7
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0 to 600mA,
V
IN
= 2.7V to 5.5V
No Load, 0.6V Adjustable
Version
EN = AGND = PGND
600
0.45
0.40
V
IN
= 5.5V, V
LX
= 0 to V
IN
,
EN = GND
V
IN
= 2.7V to 5.5V
0.6V Output, No Load
T
A
= 25°C
0.6V Output
>0.6V Output
From Enable to Output
Regulation
T
A
= 25°C
1
0.5
591
250
100
0.7
1.0
140
15
1.5
600
609
0.2
100
1.8
-3.5
0.6
25
+3.5
V
IN
50
1.0
AAT1126
Typ
Max
5.5
2.6
Units
V
V
mV
V
%
V
µA
µA
mA
Ω
Ω
µA
%/V
mV
µA
kΩ
µs
MHz
°C
°C
V
V
µA
Step-Down Converter
V
IN
Input Voltage
V
UVLO
V
OUT
V
OUT
I
Q
I
SHDN
I
OUT_X
R
DS(ON)H
R
DS(ON)L
I
LXLEAK
ΔV
Linereg
V
OUT
I
OUT
R
OUT
T
S
F
OSC
T
SD
T
HYS
EN
V
EN(L)
V
EN(H)
I
EN
Enable Threshold Low
Enable Threshold High
Input Low Current
UVLO Threshold
Output Voltage Tolerance
Output Voltage Range
Quiescent Current
Shutdown Current
Maximum Load Current
High Side Switch On Resistance
Low Side Switch On Resistance
LX Leakage Current
Line Regulation
Out Threshold Voltage Accuracy
Out Leakage Current
Out Impedance
Start-Up Time
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
0.6
V
IN
= V
FB
= 5.5V
1.4
-1.0
1.0
1. The AAT1126 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
1126.2006.05.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
