AAT1123
1MHz Step-Down Converter
Electrical Characteristics1
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, VIN = 3.6V.
Symbol
Description
Conditions
Min
Typ
Max Units
Step-Down Converter
VIN
Input Voltage
2.7
5.5
2.6
V
V
VIN Rising
Hysteresis
VIN Falling
VUVLO
UVLO Threshold
100
mV
V
1.8
-3.5
0.6
I
OUT = 0 to 600mA,
VOUT
VOUT
IQ
Output Voltage Tolerance
Output Voltage Range
Quiescent Current
+3.5
VIN
50
%
V
VIN = 2.7V to 5.5V
No Load, 0.6V Adjustable
Version
25
µA
ISHDN
IOUT_X
RDS(ON)H
RDS(ON)L
Shutdown Current
EN = AGND = PGND
1.0
µA
mA
Ω
Maximum Load Current
600
High Side Switch On Resistance
Low Side Switch On Resistance
0.45
0.40
Ω
V
IN = 5.5V, VLX = 0 to VIN,
ILXLEAK
ΔVLinereg
VOUT
LX Leakage Current
1
µA
%/V
mV
EN = GND
Line Regulation
VIN = 2.7V to 5.5V
0.6V Output, No Load
TA = 25°C
0.5
609
0.2
Out Threshold Voltage Accuracy
591
250
600
100
IOUT
Out Leakage Current
Out Impedance
0.6V Output
µA
ROUT
>0.6V Output
From Enable to Output
Regulation
kΩ
TS
Start-Up Time
µs
FOSC
TSD
Oscillator Frequency
TA = 25°C
0.7
1.0
140
15
1.5
MHz
°C
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
THYS
°C
EN
VEN(L)
VEN(H)
IEN
Enable Threshold Low
Enable Threshold High
Input Low Current
0.6
1.0
V
V
1.4
VIN = VFB = 5.5V
-1.0
µA
1. The AAT1123 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.
4
1123.2006.05.1.5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
