AAT2500
1MHz Step-Down Converter/LDO Regulator
Electrical Characteristics1
Symbol
Description
Conditions
Min Typ Max Units
Buck Converter Typical values are TA = 25°C, VIN = VCC = Vp = 3.6V.
VIN
Input Voltage
2.7
5.5
2.6
V
V
VIN Rising
Hysteresis
VIN Falling
VUVLO
UVLO Threshold
100
mV
V
1.8
I
OUT = 0 to 400mA,
VOUT
VOUT
Output Voltage Tolerance
Output Voltage Range
-3.0
+3.0
%
V
VIN = 2.7V to 5.5V
Fixed Output Version
0.6
0.6
4.0
2.5
Adjustable Output Version2
ENLDO = GND, No Load,
0.6V Adjustable Model
Step-Down Converter
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On
Resistance
IQBUCK
25
50
µA
ISHDN
ILIM
EN = SGND = PGND, ENLDO = GND
1.0
µA
600
mA
RDS(ON)H
RDS(ON)L
0.45
0.4
Ω
Ω
Low Side Switch On
Resistance
V
IN = 5.5V, VLX = 0 - VIN
ILXLK
VLinereg
VFB
LX Leakage Current
1.0
0.2
µA
%/V
mV
EN = SGND = PGND
VIN = 2.7V to 5.5V
Line Regulation
FB Threshold Voltage
Accuracy
0.6V Output, No Load, TA = 25°C
597
600 615
0.2
IFB
RFB
FB Leakage Current
FB Impedance
0.6V Output
>0.6V Output
TA = 25°C
µA
kΩ
MHz
250
0.7
FOSC
Oscillator Frequency
Over-Temperature Shutdown
Threshold
1.0
1.5
TSD
140
°C
°C
Over-Temperature Shutdown
Hysteresis
THYS
15
Logic Signals
VEN(L)
Enable Threshold Low
Enable Threshold High
Leakage Current
0.6
1.0
V
V
VEN(H)
1.5
1.0
IEN(H)
µA
1. The AAT2500 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.
2. For adjustable version with higher than 2.5V output, please consult your AnalogicTech representative.
2500.2006.05.1.16
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
