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AAT1147 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1147
기능 Fast Transient 400mA Step-Down Converter
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AAT1147 데이터시트, 핀배열, 회로
DATA SHEET
AAT1147
High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter
General Description
The AAT1147 SwitchReg is a member of Skyworks' Total
Power Management IC™ (TPMIC™) product family. It is
a fixed frequency 1.4MHz step-down converter with an
input voltage range of 2.7V to 5.5V and output voltage
as low as 0.6V.
The AAT1147 is optimized for low noise portable applica-
tions, reacts quickly to load variations, and reaches peak
efficiency at heavy load.
The AAT1147 output voltage is programmable with
external feedback resistors. It can deliver 400mA of load
current while maintaining high power efficiency. The
1.4MHz switching frequency minimizes the size of exter-
nal components while keeping switching losses low.
The AAT1147 is available in a Pb-free, space-saving
2.0x2.1mm SC70JW-8 package and is rated over the
-40°C to +85°C temperature range.
Features
• VIN Range: 2.7V to 5.5V
• VOUT Adjustable from 0.6V to VIN
• 400mA Output Current
• Up to 98% Efficiency
• Low Noise, 1.4MHz Fixed Frequency PWM Operation
• Fast Load Transient
• 150μs Soft Start
• Over-Temperature and Current Limit Protection
• 100% Duty Cycle Low Dropout Operation
• <1μA Shutdown Current
• 8-Pin SC70JW Package
• Temperature Range: -40°C to +85°C
Applications
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor/DSP Core /IO Power
• PDAs and Handheld Computers
• USB Devices
Typical Application
VIN
C2
4.7µF
U1
AAT1147
3 VIN
LX 4
1 EN
OUT 2
5 AGND PGND 7
8 PGND PGND 6
VO = 1.8V
L1
4.7µH R1
118k
R2
59k
C1
4.7µF
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201986A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 23, 2012
1




AAT1147 pdf, 반도체, 판매, 대치품
DATA SHEET
AAT1147
High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter
Electrical Characteristics1
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, VIN = 3.6V.
Symbol Description
Step-Down Converter
VIN Input Voltage
VUVLO
UVLO Threshold
VOUT
VOUT
IQ
ISHDN
ILIM
RDS(ON)H
RDS(ON)L
ILXLEAK
VLINEREG
VOUT
IOUT
TS
FOSC
TSD
THYS
EN
VEN(L)
VEN(H)
IEN
Output Voltage Tolerance
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
Out Threshold Voltage Accuracy
Out Leakage Current
Start-Up Time
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
VIN Rising
Hysteresis
VIN Falling
IOUT = 0 to 400mA, VIN = 2.7V to 5.5V
No Load
EN = AGND = PGND
VIN = 5.5V, VLX = 0 to VIN, EN = GND
VIN = 2.7V to 5.5V
0.6V Output, No Load, TA = 25°C
0.6V Output
From Enable to Output Regulation
VIN = VOUT = 5.5V
Min
2.7
1.8
-3.0
0.6
600
591
1.0
1.4
-1.0
Typ Max Units
100
160
0.45
0.40
0.1
600
150
1.4
140
15
5.5
2.7
3.0
VIN
300
1.0
1
609
0.2
2.0
0.6
1.0
V
V
mV
V
%
V
μA
μA
mA
μA
%/V
mV
μA
μs
MHz
°C
°C
V
V
μA
1. The AAT1147 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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
4 201986A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 23, 2012

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AAT1147 전자부품, 판매, 대치품
DATA SHEET
AAT1147
High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter
Typical Characteristics
220
210
200
190
180
170
160
150
140
130
120
2.5
No-Load Quiescent Current
vs. Input Voltage
25°C
85°C
-40°C
3.0 3.5 4.0 4.5 5.0
Input Voltage (V)
5.5
Line Transient Response
(40mA to 400mA; VIN = 3.6V; VOUT = 1.8V;
C1 = 4.7µF; CFF = 100pF)
2.0 1.4
1.9 1.2
1.8 1.0
1.7 0.8
1.6 0.6
1.5 0.4
1.4
1.3 400 mA
0.2
0.0
1.2 -0.2
40 mA
1.1 -0.4
1.0 -0.6
Time (25µs/div)
Line Transient Response
(40mA to 400mA; VIN = 3.6V;
VOUT = 1.8V; C1 = 4.7µF)
2.0 1.4
1.9 1.2
1.8 1.0
1.7 0.8
1.6 0.6
1.5 0.4
1.4 0.2
1.3 400mA
0.0
1.2 -0.2
40mA
1.1 -0.4
1.0 -0.6
Time (25µs/div)
Soft Start
(VIN = 3.6V; VOUT = 1.8V; IOUT = 400mA)
5.6
4.8
4.0
3.2
2.4
1.6
0.8
0.0
-0.8
-1.6
-2.4
Time (25µs/div)
3.6
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.0
-0.4
Line Response
(VOUT = 1.8V @ 400mA)
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1.55
1.50
1.45
1.40
Time (25µs/div)
5.2
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
Output Ripple
(VIN = 3.6V; VOUT = 1.8V; IOUT = 400mA)
40
20
0
-20
-40
-60
-80
-100
-120
Time (500ns/div)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201986A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 23, 2012
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