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AAT2556 Datasheet(PDF) 4 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) 4 Page - Advanced Analog Technology, Inc.

 
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Electrical Characteristics1
VIN = 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
V
VIN Rising
2.7
V
VUVLO
UVLO Threshold
Hysteresis
200
mV
VIN Falling
1.8
V
VOUT
Output Voltage Tolerance2
IOUT = 0 to 250mA,
-3.0
3.0
%
VIN = 2.7V to 5.5V
VOUT
Output Voltage Range
0.6
VIN
V
IQ
Quiescent Current
No Load
30
µA
ISHDN
Shutdown Current
EN = GND
1.0
µA
ILIM
P-Channel Current Limit
600
mA
RDS(ON)H
High-Side Switch On Resistance
0.59
Ω
RDS(ON)L
Low-Side Switch On Resistance
0.42
Ω
ILXLEAK
LX Leakage Current
VIN = 5.5V, VLX = 0 to VIN
1.0
µA
ΔVLinereg/ΔVIN Line Regulation
VIN = 2.7V to 5.5V
0.2
%/V
VFB
Feedback Threshold Voltage Accuracy
VIN = 3.6V
0.591
0.600
0.609
V
IFB
FB Leakage Current
VOUT = 1.0V
0.2
µA
FOSC
Oscillator Frequency
1.5
MHz
TS
Startup Time
From Enable to Output
100
µs
Regulation
TSD
Over-Temperature Shutdown Threshold
140
°C
THYS
Over-Temperature Shutdown Hysteresis
15
°C
VEN(L)
Enable Threshold Low
0.6
V
VEN(H)
Enable Threshold High
1.4
V
IEN
Input Low Current
VIN = VEN = 5.5V
-1.0
1.0
µA
AAT2556
Battery Charger and Step-Down
Converter for Portable Applications
4
2556.2006.09.1.2
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 correlation with statistical process controls.
2. Output voltage tolerance is independent of feedback resistor network accuracy.


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