AAT2552 Datasheet, PDF (4/33 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

AAT2552
Total Power Solution for Portable Applications
Electrical Characteristics¹
V_INB = 3.6V; T_A = -40°C to +85°C, unless otherwise noted. Typical values are T_A = 25°C.
Symbol Description
Conditions
Min Typ Max Units
Step-Down Converter
V_IN
V_UVLO
Input Voltage
UVLO Threshold
V_INB Rising
Hysteresis
2.7
5.5 V
2.6 V
250
mV
V_OUT
Output Voltage Tolerance²
I_OUTB = 0 to 300mA,
-3.0
V_INB = 2.7V to 5.5V
3.0 %
V_OUT
Output Voltage Range
0.6
V_INB
V
I_Q
Quiescent Current
No Load
45
90 µA
I_SHDN
Shutdown Current
V_ENB = GND
1.0 µA
I_LIM
P-Channel Current Limit
300
mA
R_DS(ON)H
High-Side Switch On Resistance
0.3
Ω
R_DS(ON)L
Low-Side Switch On Resistance
0.5
Ω
I_LXLEAK
LX Leakage Current
V_INB = 5.5V, V_LX = 0 to V_INB
1.0 µA
ΔV_OUT/ΔV_OUT Load Regulation
I_OUTB = 0mA to 300mA
0.4
%
ΔV_Linereg/ΔV_IN Line Regulation
V_INB = 2.7V to 5.5V
0.1
%/V
V_FB
Feedback Threshold Voltage Accuracy V_INB = 3.6V
0.591 0.6 0.609 V
I_FB
FB Leakage Current
V_OUTB = 1.0V
0.2 µA
F_OSC
Oscillator Frequency
1.5
MHz
T_S
Startup Time
From Enable to Output
Regulation
120
µs
T_SD
T_HYS
V_EN(L)
V_EN(H)
I_EN
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
V_INB = V_ENB = 5.5V
140
°C
15
°C
0.6 V
1.4
V
-1.0
1.0 µA
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