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AAT2556 Datasheet(PDF) 5 Page - Advanced Analog Technology, Inc.

Part No. AAT2556
Description  Battery Charger and Step-Down Converter for Portable Applications
Download  29 Pages
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Maker  AAT [Advanced Analog Technology, Inc.]
Homepage  http://www.aatech.com.tw
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AAT2556 Datasheet(HTML) 5 Page - Advanced Analog Technology, Inc.

 
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Electrical Characteristics1
VADP = 5V; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
Description
Conditions
Min
Typ
Max Units
Battery Charger
Operation
VADP
Adapter Voltage Range
4.0
6.5
V
VUVLO
Under-Voltage Lockout (UVLO)
Rising Edge
3
4
V
UVLO Hysteresis
150
mV
IOP
Operating Current
Charge Current = 200mA
0.5
1
mA
ISHUTDOWN
Shutdown Current
VBAT = 4.25V, EN = GND
0.3
1
µA
ILEAKAGE
Reverse Leakage Current from BAT Pin
VBAT = 4V, ADP Pin Open
0.4
2
µA
Voltage Regulation
VBAT_EOC
End of Charge Accuracy
4.158
4.20
4.242
V
ΔVCH/VCH
Output Charge Voltage Tolerance
0.5
%
VMIN
Preconditioning Voltage Threshold
2.85
3.0
3.15
V
VRCH
Battery Recharge Voltage Threshold
Measured from VBAT_EOC
-0.1
V
Current Regulation
ICH
Charge Current Programmable Range
15
500
mA
ΔICH/ICH
Charge Current Regulation Tolerance
10
%
VSET
ISET Pin Voltage
2
V
KI_A
Current Set Factor: ICH/ISET
800
Charging Devices
RDS(ON)
Charging Transistor On Resistance
VADP = 5.5V
0.9
1.1
Ω
Logic Control/Protection
VEN(H)
Input High Threshold
1.6
V
VEN(L)
Input Low Threshold
0.4
V
VSTAT
Output Low Voltage
STAT Pin Sinks 4mA
0.4
V
ISTAT
STAT Pin Current Sink Capability
8
mA
VOVP
Over-Voltage Protection Threshold
4.4
V
ITK/ICHG
Pre-Charge Current
ICH = 100mA
10
%
ITERM/ICHG
Charge Termination Threshold Current
10
%
AAT2556
Battery Charger and Step-Down
Converter for Portable Applications
2556.2006.09.1.2
5
1. The AAT2556 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -25°C to +85°C
temperature range is guaranteed by design.


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