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AAT1153 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1153
기능 2A Step-Down Converter
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AAT1153 데이터시트, 핀배열, 회로
General Description
The AAT1153 SwitchReg™ is a 1.2MHz constant fre-
quency current mode PWM step-down converter. It is
ideal for portable equipment requiring very high current
up to 2A from single-cell Lithium-ion batteries while still
achieving over 90% efficiency during peak load condi-
tions. The AAT1153 also can run at 100% duty cycle for
low dropout operation, extending battery life in portable
systems while light load operation provides very low
www.DataoSuhetpetu4tU.rciopmple for noise sensitive applications.
The AAT1153 can supply up to 2A output load current
from a 2.5V to 5.5V input voltage and the output voltage
can be regulated as low as 0.6V. The high switching fre-
quency minimizes the size of external components while
keeping switching losses low. The internal slope compen-
sation setting allows the device to operate with smaller
inductor values to optimize size and provide efficient
operation.
The AAT1153 is available in adjustable (0.6V to VIN) and
fixed (1.8V) output voltage versions. The device is avail-
able in a Pb-free, 3mm x 3mm 10-lead TDFN package
and is rated over the -40°C to +85°C temperature
range.
PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
Features
• Input Voltage Range: 2.5V to 5.5V
• Output Voltages from 0.6V to VIN
• 2A Output Current
• High Efficiency: Up to 95%
• 1.2MHz Constant Switching Frequency
• Low RDS(ON) Internal Switches: 0.15Ω
• Allows Use of Ceramic Capacitors
• Current Mode Operation for Excellent Line and Load
Transient Response
• Short-Circuit and Thermal Fault Protection
• Soft Start
• Low Dropout Operation: 100% Duty Cycle
• Low Shutdown Current: ISHUTDOWN < 1μA
• TDFN33-10 Package
• -40°C to +85°C Temperature Range
Applications
• Cellular Phones
• Digital Cameras
• DSP Core Supplies
• PDAs
• Portable Instruments
• Smart Phones
Typical Application
VIN 2.5V-5.5V
C1
22μF
1
EN
2 IN
3 AIN
LX 8
AAT1153-1.8 LX 7
OUT 5
6 AGND
4 AGND
PGND 10
PGND 9
L1
2.2μH
VOUT
1.8V, 2A
C2
22μF
1153.2007.11.1.1
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AAT1153 pdf, 반도체, 판매, 대치품
PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
Electrical Characteristics1
VIN = 3.6V, TA = -40°C to +85°C unless otherwise noted; typical values are TA = 25°C.
Symbol
VIN
VOUT
IQ
IFB
Description
Input Voltage Range2
Output Voltage Range
Input DC Supply Current
Feedback Input Bias Current
www.DataSheeVt4FUB .com Regulated Feedback Voltage3
ΔVLINEREG/
ΔVIN
ΔVLOADREG/
ΔIOUT
Line Regulation
Load Regulation
Conditions
Active Mode: VFB = 0.5V
Shutdown Mode: VEN = 0V, VAIN = 5.5V
VFB = 0.65V
TA = 25°C
0°C TA 85°C
-40°C TA 85°C
VIN = 2.5V to 5.5V, IOUT = 10mA
IOUT = 10mA to 2000mA
VFB Output Voltage Accuracy
VIN = 2.5 to 5.5V, IOUT = 10 to 2000mA
FOSC
TS
TSD
THYS
ILIM
RDS(ON)
VEN(L)
VEN(H)
IEN
Oscillator Frequency
Startup Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Peak Switch Current
P-CH MOSFET
N-CH MOSFET
Enable Threshold Low
Enable Threshold High
Input Low Current
VFB = 0.6V
From Enable to Output Regulation
VIN = 3.6V
VIN = 3.6V
VIN = VEN = 5.5V
Min
2.5
0.6
0.5880
0.5865
0.5850
Typ
300
0.1
0.6000
0.6000
0.6000
Max
5.5
VIN
500
1
30
0.6120
0.6135
0.6150
Units
V
V
μA
μA
nA
V
0.10 0.20 %/V
0.20
%/A
-3 +3 % VOUT
0.96 1.2 1.44 MHz
1.3 ms
170 °C
10 °C
2.5 3.5
A
135
95
200
150
mΩ
0.3 V
1.5 V
-1.0
1.0 μA
1. The AAT1153 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. VIN should be not less than VOUT + VDROPOUT, where VDROPOUT = IOUT x (RDS(ON)PMOS + ESRINDUCTOR), typically VDROPOUT = 0.3V.
3. The regulated feedback voltage is tested in an internal test mode that connects VFB to the output of the error amplifier.
4
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AAT1153 전자부품, 판매, 대치품
Typical Characteristics
P-Channel RDS(ON) vs. Input Voltage
200
180 85°C
160
25°C
140
www.DataShe1e2t04U.com-40°C
100
80
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Switching Frequency vs. Temperature
(VIN = 3.6V; VOUT = 1.8V)
1.4
1.3
1.2
1.1
1.0
-40
-20
0 20 40 60
Temperature (°C)
80 100
Soft Start
(VIN = 3.6V; VOUT = 1.8V; IOUT = 2A; CFF = 22pF)
6
4
2
0
-2
1.4
1.0
0.6
0.2
-0.2
Time (400µs/div)
PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
N-Channel RDS(ON) vs. Input Voltage
150
130 85°C
110
25°C
90
70 -40°C
50
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Reference Voltage vs. Temperature
(VIN = 3.6V)
0.609
0.607
0.605
0.603
0.601
0.599
0.597
0.595
0.593
0.591
-40
-20
0 20 40 60
Temperature (°C)
80
100
Load Transient Response
(VIN = 3.6V; VOUT = 1.8V; L = 2.2µH; CIN = COUT = 22µF)
2.2
2.0
1.8
1.6
200mA
2A
Time (400µs/div)
2.6
2.2
1.8
1.4
1.0
0.6
0.2
-0.2
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