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부품번호 | AAT2552 기능 |
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기능 | Total Power Solution | ||
제조업체 | AAT | ||
로고 | |||
전체 30 페이지수
www.DataSheet4U.com
AAT2552
Total Power Solution for Portable Applications
General Description
Features
SystemPower™
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.
Typical Application
• 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 VIN
— 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
Adapter/USB Input
Enable
VOUTB
COUTB
4.7μF
RFBB1
RFBB2
VOUTA
COUTA
ADP
INB
STAT
ENB
EN_BAT
INA
L1 ENA
LX AAT2552
RFBA1
RFBA2
FBB
OUTA
FBA
GND
MODE
BAT
ISET
COUT
R SET
BATT+
BATT-
Battery
Pack
2552.2007.04.1.0
1
AAT2552
Total Power Solution for Portable Applications
Electrical Characteristics1
VINB = 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
VUVLO
Input Voltage
UVLO Threshold
VINB Rising
Hysteresis
2.7 5.5 V
2.6 V
250 mV
VOUT
Output Voltage Tolerance2
IOUTB = 0 to 300mA,
VINB = 2.7V to 5.5V
-3.0
3.0 %
VOUT
Output Voltage Range
0.6
VINB
V
IQ Quiescent Current
No Load
45 90 µA
ISHDN
Shutdown Current
VENB = GND
1.0 µA
ILIM P-Channel Current Limit
300 mA
RDS(ON)H
High-Side Switch On Resistance
0.3 Ω
RDS(ON)L
Low-Side Switch On Resistance
0.5 Ω
ILXLEAK
LX Leakage Current
VINB = 5.5V, VLX = 0 to VINB
1.0 µA
ΔVOUT/ΔVOUT Load Regulation
IOUTB = 0mA to 300mA
0.4 %
ΔVLinereg/ΔVIN Line Regulation
VINB = 2.7V to 5.5V
0.1 %/V
VFB Feedback Threshold Voltage Accuracy VINB = 3.6V
0.591 0.6 0.609 V
IFB FB Leakage Current
VOUTB = 1.0V
0.2 µA
FOSC
Oscillator Frequency
1.5 MHz
TS Startup Time
From Enable to Output
Regulation
120 µs
TSD
THYS
VEN(L)
VEN(H)
IEN
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
VINB = VENB = 5.5V
140 °C
15 °C
0.6 V
1.4 V
-1.0 1.0 µA
1. The AAT2552 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.
4 2552.2007.04.1.0
4페이지 AAT2552
Total Power Solution for Portable Applications
Typical Characteristics–Battery Charger
Constant Charging Current vs. Set Resistors
(VIN = 5.0V)
10000
Operating Supply Current vs. RSET
(VIN = 5.0V)
1000
Constant Current Mode
1000
100 Preconditioning Mode
100
10
1
10 100
RSET (kΩ)
1000
10
1
10
RSET (kΩ)
100
Operating Current vs. Temperature
(VIN = 5.0V; RSET = 8.06kΩ)
540
520
500
480
460
440
-50
-25
0
25 50 75 100
Temperature (°C)
Sleep Mode Current vs. Input Voltage
(RSET = 8.06kΩ)
800
700
600 85°C 25°C
500
400
300
200
100 -40°C
0
4.0 4.5 5.0 5.5 6.0
Input Voltage (V)
6.5
Battery Charging Current vs. Battery Voltage
600
RSET = 3.24K
500
400
RSET = 5.62K
300
200 RSET = 8.06K
RSET = 16.2K
RSET = 31.6K
100
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
VBAT (V)
Constant Charging Current vs. Temperature
(RSET = 8.06kΩ)
210
208
205
203
200
198
195
193
190
-50
-25
0
25 50 75 100
Temperature (°C)
2552.2007.04.1.0
7
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부품번호 | 상세설명 및 기능 | 제조사 |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |