參數(shù)資料
型號(hào)： AAT2552
廠商： Advanced Analogic Technologies, Inc.
英文描述： Total Power Solution for Portable Applications
中文描述： 總功率便攜式應(yīng)用解決方案
文件頁(yè)數(shù)： 1/33頁(yè)
文件大?。?/td> 1051K
代理商： AAT2552
General Description
The AAT2552 is a fully integrated 500mA battery
charger, a 300mA step-down converter, and a
300mA low dropout (LDO) linear regulator. The
input voltage range is 4V to 6.5V for the battery
charger and 2.7V to 5.5V for the step-down con-
verter and linear regulator, making it ideal for appli-
cations operating with single-cell lithium-ion/poly-
mer batteries.
The battery charger is a complete constant cur-
rent/constant voltage linear charger. It offers an
integrated pass device, reverse blocking protec-
tion, high accuracy current and voltage regulation,
charge status, and charge termination. The charg-
ing current is programmable via external resistor
from 30mA to 500mA. In addition to these stan-
dard features, the device offers over-voltage, cur-
rent limit, and thermal protection.
The step-down converter is a highly integrated
converter operating at a 1.5MHz switching fre-
quency, minimizing the size of external compo-
nents while keeping switching losses low. The out-
put voltage ranges from 0.6V to the input voltage.
The AAT2552 linear regulator is designed for high
speed turn-on and turn-off performance, fast tran-
sient response, and good power supply ripple
rejection. Delivering up to 300mA of load current,
it includes short-circuit protection and thermal
shutdown.
The AAT2552 is available in a Pb-free, thermally-
enhanced TDFN34-16 package and is rated over
the -40°C to +85°C temperature range.
Features
Battery Charger:
— Input Voltage Range: 4V to 6.5V
— Programmable Charging Current up to
500mA
— Highly Integrated Battery Charger
Charging Device
Reverse Blocking Diode
Current Sensing
Step-Down Converter:
— Input Voltage Range: 2.7V to 5.5V
— Output Voltage Range: 0.6V to V
IN
— 300mA Output Current
— Up to 96% Efficiency
— 45μA Quiescent Current
— 1.5MHz Switching Frequency
— 120μs Start-Up Time
Linear Regulator:
— 300mA Output Current
— Low Dropout: 400mV at 300mA
— Fast Line and Load Transient Response
— High Accuracy: ±1.5%
— 85μA Quiescent Current
Short-Circuit, Over-Temperature, and Current
Limit Protection
TDFN34-16 Package
-40°C to +85°C Temperature Range
Applications
Bluetooth
Headsets
Cellular Phones
GPS
Handheld Instruments
MP3 and Portable Music Players
PDAs and Handheld Computers
Portable Media Players
AAT2552
Total Power Solution for Portable Applications
Typical Application
BATT-
ADP
STAT
EN_BAT
GND
BAT
MODE
ISET
INB
ENB
INA
ENA
BATT+
AAT2552
Adapter/USB Input
Enable
R
SET
C
Battery
Pack
OUT
S
L1
FBB
OUTA
LX
R
FBB2
R
FBB1
R
FBA2
R
FBA1
C
4.7μF
V
OUTB
FBA
C
OUTA
V
OUTA
2552.2007.04.1.0
1
SystemPower
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