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AAT2554 데이터시트 PDF




AAT에서 제조한 전자 부품 AAT2554은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 AAT2554 기능
기능 Total Power Solution
제조업체 AAT
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AAT2554 데이터시트, 핀배열, 회로
AAT2554
Total Power Solution for Portable Applications
General Description
Features
SystemPower
The AAT2554 is a fully integrated 500mA battery
• Battery Charger:
charger, a 250mA step-down converter, and a
— Input Voltage Range: 4V to 6.5V
300mA low dropout (LDO) linear regulator. The
— Programmable Charging Current up to
input voltage range is 4V to 6.5V for the battery
500mA
charger and 2.7V to 5.5V for the step-down con-
— Highly Integrated Battery Charger
verter and linear regulator, making it ideal for
• Charging Device
applications operating with single-cell lithium-
• Reverse Blocking Diode
ion/polymer batteries.
• Step-Down Converter:
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 15mA to 500mA. In addition to these stan-
dard features, the device offers over-voltage, cur-
rent limit, and thermal protection.
— Input Voltage Range: 2.7V to 5.5V
— Output Voltage Range: 0.6V to VIN
— 250mA Output Current
— Up to 96% Efficiency
— 30µA Quiescent Current
— 1.5MHz Switching Frequency
— 100µs Start-Up Time
• Linear Regulator:
— 300mA Output Current
— Low Dropout: 400mV at 300mA
The step-down converter is a highly integrated
— Fast Line and Load Transient Response
converter operating at a 1.5MHz switching fre-
— High Accuracy: ±1.5%
quency, minimizing the size of external compo-
— 70µA Quiescent Current
nents while keeping switching losses low. It has
• Short-Circuit, Over-Temperature, and Current
www.DataSheet4U.com
independent input and enable pins. The output
Limit Protection
voltage ranges from 0.6V to the input voltage.
• TDFN34-16 Package
The AAT2554 linear regulator is designed for fast
• -40°C to +85°C Temperature Range
transient response and good power supply ripple
rejection. Designed for 300mA of load current,
it includes short-circuit protection and thermal
shutdown.
Applications
The AAT2554 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
• Bluetooth® Headsets
• Cellular Phones
• Handheld Instruments
• MP3 and Portable Music Players
• PDAs and Handheld Computers
• Portable Media Players
Adapter/USB Input
ADP
VINB
Enable
VOUTB
C OUTB
RFB1
RFB2
L= 3.0µH
VOUTA
COUTA
ENB
STAT
VINA
EN_BAT
ENA
AAT2554
LX
BAT
FB
OUTA
ISET
GND
COUT
R SET
BATT+
BATT-
Battery
Pack
2554.2007.01.1.2
1




AAT2554 pdf, 반도체, 판매, 대치품
AAT2554
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
Step-Down Converter
VIN Input Voltage
VUVLO
UVLO Threshold
VOUT
VOUT
IQ
ISHDN
ILIM
RDS(ON)H
RDS(ON)L
ILXLEAK
ΔVLinereg/ΔVIN
VFB
IFB
FOSC
TS
TSD
THYS
VEN(L)
VEN(H)
IEN
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
VINB Rising
Hysteresis
VINB Falling
IOUTB = 0 to 250mA,
VINB = 2.7V to 5.5V
No Load
ENB = GND
VINB = 5.5V, VLX = 0 to VINB
VINB = 2.7V to 5.5V
VINB = 3.6V
VOUTB = 1.0V
From Enable to Output
Regulation
VINB = VENB = 5.5V
Min
2.7
1.8
-3.0
0.6
0.591
1.4
-1.0
Typ
200
30
600
0.59
0.42
0.2
0.6
1.5
100
140
15
Max Units
5.5 V
2.7 V
mV
V
3.0 %
VINB
1.0
1.0
0.609
0.2
V
µA
µA
mA
Ω
Ω
µA
%/V
V
µA
MHz
µs
°C
°C
0.6 V
V
1.0 µA
1. The AAT2554 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 2554.2007.01.1.2

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AAT2554 전자부품, 판매, 대치품
AAT2554
Total Power Solution for Portable Applications
Typical Characteristics – Step-Down Converter
Efficiency vs. Load
(VOUT = 1.8V; L = 3.3µH)
100
VIN = 2.7V
90
VIN = 3.6V
80
VIN = 5.0V
70 VIN = 5.5V
60 VIN = 4.2V
50
40
0.1
1
10 100
Output Current (mA)
1000
DC Load Regulation
(VOUT = 1.8V; L = 3.3µH)
1.0
0.5
VIN = 3.6V
0.0
VIN = 2.7V
-0.5
VIN = 4.2V
VIN = 5.5V
VIN = 5.0V
-1.0
0.1
1 10 100
Output Current (mA)
1000
Efficiency vs. Load
(VOUT = 1.2V; L = 1.5µH)
100
90 VIN = 2.7V
80 VIN = 3.6V
70
60
50
40
30
0.1
VIN = 5.5V
VIN = 5.0V
VIN = 4.2V
1 10
100
Output Current (mA)
1000
DC Load Regulation
(VOUT = 1.2V; L = 1.5µH)
1.0
VIN = 5.0V
0.5
VIN = 5.5V
0.0
VIN = 3.6V
-0.5 VIN = 4.2V
VIN = 2.7V
-1.0
0.1 1
10 100
Output Current (mA)
1000
Soft Start
(VIN = 3.6V; VOUT = 1.8V;
IOUT = 250mA; CFF = 100pF)
5.0
4.0 VEN
3.0
2.0
1.0
0.0
-1.0 VO
-2.0
-3.0
-4.0 IL
-5.0
Time (100µs/div)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
Line Regulation
(VOUT = 1.8V)
0.6
0.5
0.4 IOUT = 0mA
0.3 IOUT = 50mA
0.2
0.1 IOUT = 150mA
0.0
-0.1
-0.2
IOUT = 10mA
IOUT = 250mA
-0.3
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage (V)
2554.2007.01.1.2
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