AAT2552
Total Power Solution for Portable Applications
1
Electrical Characteristics
VINB = 3.6V; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
Description
Conditions
Min
Typ
Max Units
Step-Down Converter
VIN
Input Voltage
2.7
5.5
2.6
V
V
mV
VINB Rising
Hysteresis
IOUTB = 0 to 300mA,
VINB = 2.7V to 5.5V
VUVLO
UVLO Threshold
250
45
2
VOUT
Output Voltage Tolerance
-3.0
0.6
3.0
%
VOUT
IQ
ISHDN
Output Voltage Range
Quiescent Current
Shutdown Current
VINB
90
1.0
V
µA
µA
mA
Ω
Ω
µA
%
%/V
V
µA
MHz
No Load
VENB = GND
ILIM
P-Channel Current Limit
300
RDS(ON)H
RDS(ON)L
ILXLEAK
ΔVOUT/ΔVOUT Load Regulation
ΔVLinereg/ΔVIN Line Regulation
High-Side Switch On Resistance
Low-Side Switch On Resistance
LX Leakage Current
0.3
0.5
VINB = 5.5V, VLX = 0 to VINB
IOUTB = 0mA to 300mA
VINB = 2.7V to 5.5V
1.0
0.4
0.1
0.6
VFB
IFB
FOSC
Feedback Threshold Voltage Accuracy VINB = 3.6V
FB Leakage Current
Oscillator Frequency
0.591
0.609
0.2
VOUTB = 1.0V
1.5
From Enable to Output
Regulation
TS
Startup Time
120
µs
TSD
THYS
VEN(L)
VEN(H)
IEN
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
140
15
°C
°C
V
V
µA
0.6
1.0
1.4
-1.0
VINB = VENB = 5.5V
1. The AAT2552 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. Output voltage tolerance is independent of feedback resistor network accuracy.
4
2552.2007.04.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
