1MHz Step-Down Converter/LDO Regulator
Electrical Characteristics
1
Symbol
Description
Conditions
Min
2.7
100
1.8
-3.5
0.6
25
600
0.45
0.40
1.0
1.0
0.5
591
0.7
600
1.0
100
140
15
0.6
1.5
1.0
1.0
609
0.2
1.5
+3.5
V
IN
50
1.0
AAT2506
Typ
Max
5.5
2.6
Units
V
V
mV
V
%
V
µA
µA
mA
Ω
Ω
µA
µA
%/V
mV
µA
MHz
µs
°C
°C
V
V
µA
Buck Converter
Typical values are T
A
= 25°C, V
IN
= V
CC
= V
p
= 3.6V.
V
IN
Input Voltage
V
IN
Rising
V
UVLO
UVLO Threshold
Hysteresis
V
IN
Falling
I
OUT
= 0 to 400mA,
V
OUT
Output Voltage Tolerance
V
IN
= 2.7V to 5.5V
V
OUT
Output Voltage Range
Step-Down Converter
ENLDO = GND, No Load,
I
QBUCK
Quiescent Current
0.6V Adjustable Model
I
SHDN
Shutdown Current
EN = SGND = PGND, ENLDO = GND
I
LIM
P-Channel Current Limit
High Side Switch On
R
DS(ON)H
Resistance
Low Side Switch On
R
DS(ON)L
Resistance
V
IN
= 5.5V, V
LX
= 0 - V
IN
I
LXLK
LX Leakage Current
EN = SGND = PGND
I
LXLK, R
LX Reverse Leakage Current V
IN
= Open, V
LX
= 5.5V,
(fixed)
EN = SGND = PGND
V
Linereg
Line Regulation
V
IN
= 2.7V to 5.5V
FB Threshold Voltage
V
FB
0.6V Output, No Load, T
A
= 25°C
Accuracy
I
FB
FB Leakage Current
0.6V Output
F
OSC
Oscillator Frequency
T
A
= 25°C
T
S
Start-Up Time
From Enable to Output Regulation
Over-Temperature Shutdown
T
SD
Threshold
Over-Temperature Shutdown
T
HYS
Hysteresis
Logic Signals
V
EN(L)
Enable Threshold Low
V
EN(H)
Enable Threshold High
I
EN(H)
Leakage Current
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.
2506.2006.05.1.3
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
