AAT2556 Datasheet, PDF (4/27 Pages) Advanced Analogic Technologies – Battery Charger and Step-Down Converter for Portable Applications

DATA SHEET
AAT2556
Battery Charger and Step-Down Converter for Portable Applications
Electrical Characteristics¹
V_IN = 3.6V; T_A = -40°C to +85°C, unless otherwise noted. Typical values are T_A = 25°C.
Symbol Description
Step-Down Converter
V_IN
Input Voltage
V_UVLO
UVLO Threshold
V_OUT
V_OUT
I_Q
I_SHDN
I_LIM
R_DS(ON)H
R_DS(ON)L
I_LXLEAK
V_Linereg/
V_IN
V_FB
I_FB
F_OSC
T_S
T_SD
T_HYS
V_EN(L)
V_EN(H)
I_EN
Output Voltage Tolerance²
Output Voltage Range
Quiescent Current
Shutdown Current
P-Channel Current Limit
High-Side Switch On Resistance
Low-Side Switch On Resistance
LX Leakage Current
Line Regulation
Feedback Threshold Voltage Accuracy
FB Leakage Current
Oscillator Frequency
Startup Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
V_IN Rising
Hysteresis
V_IN Falling
I_OUT = 0 to 250mA, V_IN = 2.7V to 5.5V
No Load
EN = GND
V_IN = 5.5V, V_LX = 0 to V_IN
V_IN = 2.7V to 5.5V
V_IN = 3.6V
V_OUT = 1.0V
From Enable to Output Regulation
V_IN = V_EN = 5.5V
Min Typ Max Units
2.7
1.8
-3.0
0.6
0.591
1.4
-1.0
200
30
600
0.59
0.42
0.2
0.600
1.5
100
140
15
5.5
2.7
3.0
V_IN
1.0
1.0
0.609
0.2
0.6
1.0
V
V
mV
V
%
V
μA
μA
mA


μA
%/V
V
μA
MHz
μs
°C
°C
V
V
μA
1. The AAT2556 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. Output voltage tolerance is independent of feedback resistor network accuracy.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
4
202177B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 19, 2013