AAT2506
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
25
mV
V
1.8
-3.5
0.6
I
OUT = 0 to 400mA,
VOUT
VOUT
Output Voltage Tolerance
+3.5
4.0
50
%
V
VIN = 2.7V to 5.5V
Output Voltage Range
Step-Down Converter
Quiescent Current
Shutdown Current
P-Channel Current Limit
High Side Switch On
Resistance
Fixed Output Version
ENLDO = GND, No Load,
0.6V Adjustable Model
IQBUCK
µA
ISHDN
ILIM
EN = SGND = PGND, ENLDO = GND
1.0
µA
600
mA
RDS(ON)H
RDS(ON)L
0.45
0.40
Ω
Ω
Low Side Switch On
Resistance
V
IN = 5.5V, VLX = 0 - VIN
ILXLK
LX Leakage Current
1.0
µA
EN = SGND = PGND
ILXLK, R
LX Reverse Leakage Current VIN = Open, VLX = 5.5V,
1.0
0.5
µA
%/V
mV
(fixed)
EN = SGND = PGND
VIN = 2.7V to 5.5V
VLinereg
VFB
Line Regulation
FB Threshold Voltage
Accuracy
0.6V Output, No Load, TA = 25°C
591
0.7
600 609
0.2
IFB
FOSC
TS
FB Leakage Current
Oscillator Frequency
Start-Up Time
0.6V Output
µA
MHz
µs
TA = 25°C
1.0
1.5
From Enable to Output Regulation
100
Over-Temperature Shutdown
Threshold
TSD
140
15
°C
°C
Over-Temperature Shutdown
Hysteresis
THYS
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 AAT2506 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.
2506.2005.12.1.0
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
