AAT2550 Datasheet, PDF (4/35 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

AAT2550
Total Power Solution for Portable Applications
Electrical Characteristics¹
V_IN = 3.6V; T_A = -40°C to +85°C, unless otherwise noted. Typical values are at T_A = 25°C.
Symbol Description
Step-Down Converters A and B
V_IN
Input Voltage
V_UVLO
Under-Voltage Lockout Threshold
V_OUT
V_OUT
I_OUT
I_Q
I_SHDN
I_LIM
I_{LX_LEAK}
I_{FB_LEAK}
R_FB
V_FB
R_DS(ON)H
R_DS(ON)L
ΔV_LineReg
F_OSC
T_SD
T_HYS
V_EN(L)
V_EN(H)
Output Voltage Tolerance
Output Voltage Range
Output Current
Quiescent Current
Shutdown Current
P-Channel Current Limit
LX Leakage Current
Feedback Leakage
FB Impedance
Feedback Threshold Voltage Accuracy
(0.6V Adjustable Version)
High-Side Switch On Resistance
Low-Side Switch On Resistance
Line Regulation
Switching Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Conditions
V_IN Rising
Hysteresis
V_IN Falling
I_OUT = 0 to 600mA,
V_IN = 2.7V to 5.5V
Per Converter
Each Converter
V_ENA = V_ENB = GND
Each Converter
V_IN = 5.5V, V_LX = 0 to V_IN,
V_ENA = V_ENB = GND
V_FB = 0.6V
V_OUT > 0.6V
No Load, T_A = 25°C
V_IN = 2.7V to 5.5V
Min
2.7
1.8
-3.0
0.6
0.8
250
0.591
1.4
Typ
100
27
1.0
0.6
0.45
0.40
0.1
1.4
140
15
Max Units
5.5
2.7
3.0
V_IN
600
70
1.0
1.0
0.2
0.609
0.6
V
V
mV
V
%
V
mA
µA
µA
A
µA
µA
kΩ
V
Ω
Ω
%/V
MHz
°C
°C
V
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