PRODUCT DATASHEET
AAT2503178
SystemPower
TM
Electrical Characteristics (continued)
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
UVLO
V
OUT
V
OUT
V
FB
I
SHDN
I
LX_LEAK
I
FB
I
LIM
R
DS(ON)H
R
DS(ON)L
ΔV
OUT
/V
OUT
ΔV
OUT
/
V
OUT
*ΔV
IN
F
OSC
T
SD
T
HYS
V
EN(L)
V
EN(H)
I
EN
V
MODE/SYNC(L)
V
MODE/SYNC(H)
I
MODE/SYNC
Adjustable 3-Channel Regulator
Description
Input Voltage
Under-Voltage Lockout Voltage
Output Voltage Tolerance
V
OUT
Programmable Range
Feedback Threshold Voltage
Shutdown Current
LX Leakage Current
Feedback Leakage
Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Load Regulation
Line Regulation
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
EN Input Leakage
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
Min
2.7
Typ
Max
5.5
1.8
Units
V
V
mV
V
%
V
V
μA
μA
μA
A
mΩ
mΩ
%
%/V
Step-Down Converter; I
OUT
= 800mA
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0 to 800mA; V
IN
= 2.7V to 5.5V
250
1.5
-3.0
0.9
0.891
3.0
V
IN
0.909
1.0
1.0
0.2
0.9
EN = GND
V
IN
= 5.5, V
LX
= 0 to V
IN
V
FB
= 1.0V
1.2
400
300
0.5
0.2
1.6
2.0
140
15
I
LOAD
= 0 to 800mA
2.4
0.6
V
EN
= 5V, V
IN
= 5V
1.4
-1.0
V
IN
· 0.7
-1.0
1.0
V
IN
· 0.4
1.0
MHz
°C
°C
V
V
μA
V
V
μA
1. The AAT2503 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.
2503.2008.02.1.4
www.analogictech.com
5
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