Dual Channel, Step-Down
Converter/Linear Regulator
Electrical Characteristics
1
I
OUT
= 600mA; typical values are T
A
= 25°C, V
IN
= V
CC
= V
P
= 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
ENLDO = GND, No Load,
0.6V Adjustable Version
EN = SGND = PGND,
ENLDO = GND
800
0.45
0.40
V
IN
= 5.5V, V
LX
= 0 to V
IN
,
EN = SGND = PGND
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
0.1
591
250
150
1.0
1.4
140
15
0.6
1.4
-1.0
1.0
2.0
600
609
0.2
100
1.8
-3.0
0.6
27
3.0
V
IN
70
1.0
AAT2505
Typ
Max
5.5
2.7
Units
V
V
mV
V
%
V
µA
µA
mA
Ω
Ω
µA
%/V
mV
µA
kΩ
µs
MHz
°C
°C
V
V
µA
Buck Converter
V
IN
Input Voltage
V
UVLO
V
OUT
V
OUT
I
QBUCK
I
SHDN
I
LIM
R
DS(ON)H
R
DS(ON)L
I
LXLK
ΔV
Linereg
V
FB
I
FB
R
FB
T
S
F
OSC
T
SD
T
HYS
UVLO Threshold
Output Voltage Tolerance
Output Voltage Range
Step-Down Converter
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
LX Leakage Current
Line Regulation
FB Threshold Voltage Accuracy
FB Leakage Current
FB Impedance
Start-Up Time
Oscillator Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
Logic Signals
V
EN(L)
Enable Threshold Low
V
EN(H)
Enable Threshold High
I
EN(H)
Leakage Current
1. The AAT2505 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.
2505.2006.06.1.1
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
