AAT2550
Total Power Solution for Portable Applications
Electrical Characteristics1
VIN = 3.6V; TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Description
Conditions
Min
Typ
Max Units
Step-Down Converters A and B
VIN
Input Voltage
2.7
5.5
2.7
V
V
VIN Rising
Hysteresis
VIN Falling
VUVLO
Under-Voltage Lockout Threshold
100
mV
V
1.8
-3.0
0.6
I
OUT = 0 to 600mA,
VOUT
Output Voltage Tolerance
3.0
%
VIN = 2.7V to 5.5V
VOUT
IOUT
IQ
Output Voltage Range
Output Current
VIN
600
70
V
mA
µA
µA
A
Per Converter
Quiescent Current
Shutdown Current
P-Channel Current Limit
Each Converter
VENA = VENB = GND
Each Converter
27
ISHDN
ILIM
1.0
0.8
1.0
V
IN = 5.5V, VLX = 0 to VIN,
ILX_LEAK
LX Leakage Current
1.0
0.2
µA
VENA = VENB = GND
VFB = 0.6V
IFB_LEAK
RFB
Feedback Leakage
µA
FB Impedance
VOUT > 0.6V
250
kΩ
Feedback Threshold Voltage Accuracy
(0.6V Adjustable Version)
High-Side Switch On Resistance
Low-Side Switch On Resistance
Line Regulation
VFB
No Load, TA = 25°C
0.591
0.6
0.609
V
RDS(ON)H
RDS(ON)L
ΔVLineReg
FOSC
0.45
0.40
0.1
Ω
Ω
%/V
MHz
°C
°C
V
VIN = 2.7V to 5.5V
Switching Frequency
1.4
TSD
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
140
15
THYS
VEN(L)
0.6
VEN(H)
Enable Threshold High
1.4
V
1. The AAT2550 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
2550.2006.07.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
