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AAT1155 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1155
기능 Step-Down DC-DC Converter
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AAT1155 데이터시트, 핀배열, 회로
AAT1155
1MHz 2.5A Step-Down DC/DC Converter
General Description
The AAT1155 SwitchReg™ is a member of
AnalogicTech's Total Power Management IC™
(TPMIC™) product family. The step-down switch-
ing converter is ideal for applications where high
efficiency, small size, and low ripple are critical.
Able to deliver 2.5A with an internal power MOS-
FET, the current-mode controlled IC provides high
efficiency. Fully internally compensated, the
AAT1155 simplifies system design and lowers
external parts count.
The AAT1155 is available in a Pb-free MSOP-8
package and is rated over the -40°C to +85°C tem-
perature range.
Features
SwitchReg
• 5.5V Max Supply Input
• Fixed or Adjustable VOUT: 1.0V to 4.2V
• 2.5A Output Current
• Up to 95% Efficiency
• Integrated Low On Resistance Power
Switches
• Internally Compensated Current Mode Control
• 1MHz Switching Frequency
• Constant PWM Mode
• Low Output Ripple With Light Load
• Internal Soft Start
• Current Limit Protection
• Over-Temperature Protection
• MSOP-8 Package
• -40°C to +85°C Temperature Range
Typical Application
INPUT
10µF
100
0.1µF
Applications
www.DataSheet4U.com
Cable/DSL Modems
Computer Peripherals
High Efficiency Conversion from 5V or 3.3V
Supply
Network Cards
Set-Top Boxes
VP
AAT1155
ENABLE
FB
LX
LX
VCC
GND
1.5µH
120µF
OUTPUT
1155.2005.11.1.6
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AAT1155 pdf, 반도체, 판매, 대치품
AAT1155
1MHz 2.5A Step-Down DC/DC Converter
Electrical Characteristics
VIN = VCC = VP = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol
Description
Conditions
VIN
VOUT
VIL
VIH
VUVLO
VUVLO(HYS)
IQ
ISHDN
ILIM
RDS(ON)L
η
VOUT (VOUT*VIN)
VOUT/VOUT
FOSC
TSD
THYS
Input Voltage Range
Output Voltage Tolerance
Input Low Voltage
Input High Voltage
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Quiescent Supply Current
Shutdown Current
Current Limit
High Side Switch On Resistance
Efficiency
Load Regulation
Line Regulation
Oscillator Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
VIN = VOUT + 0.2 to 5.5V,
IOUT = 0.5A
VIN Rising
VIN Falling
No Load, VFB = 0V
VEN = 0V, VIN = 5.5V
TA = 25°C
TA = 25°C
IOUT = 1.0A
ILOAD = 0A to 2.5A
VIN = 2.7V to 5.5V
TA = 25°C
Min Typ Max Units
2.7 5.5 V
-2.5 2.5 %
0.6 V
1.4 V
2.5
V
1.2
250 mV
630 1000 µA
1.0 µA
4.4 A
60 m
92 %
±2.3 %
0.75 %/V
1 MHz
140 °C
15 °C
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AAT1155 전자부품, 판매, 대치품
AAT1155
1MHz 2.5A Step-Down DC/DC Converter
Typical Characteristics
Tantalum Output Ripple
(IOUT = 3.0A; VOUT = 3.3V; VIN = 5.0V)
0.04
0.02
0.00
-0.02
-0.04
-0.06
-0.08
-0.10
-0.12
120µF 6.3V Tantalum
Vishay P/N 594D127X96R3C2T
0 12 3
Time (µs)
4
7
6
5
4
3
2
1
0
-1
5
Loop Crossover Gain and Phase
16
12
8
4
0
-4
-8
100µF 6.3 Ceramic
300µF gain
-12 TDK P/N C3225X5R0J107M
Vishay GRM43SR60J107ME20L
-16
10000
Frequency (Hz)
180
L = 1.5µHy
135
Phase
90
45
0
200µF gain -45
-90
-135
-180
100000
Output Ripple
(IOUT = 3.0A; VOUT = 3.3V; VIN = 5.0V)
47
26
05
-2 4
-4 3
-6 2
-8 200µF 6.3V Ceramic
-10 TDK P/N C3325X5R0J107M
Vishay GRM43SR60J107ME20L
-12
1
0
-1
0 123 45
Time (µs)
Output Ripple
(IOUT = 3.0A; VOUT = 3.3V; VIN = 5.0V)
47
26
05
-2 4
-4 3
-6 2
-8
300µF 6.3VCeramic
-10 TDK P/N C3325X5R0J107M
Vishay GRM43SR60J107ME20L
-12
1
0
-1
01 23 45
Time (µs)
Loop Crossover Gain and Phase
16
12
8
4 Gain
0
-4
-8
-12 120µF 6.3V Tantalum
Vishay P/N 594D127X96R3C2T
-16
10000
100000
Frequency (Hz)
180
135
90
45
0
-45
-90
-135
-180
1000000
Tantalum Transient Response
(IOUT = 0 to 3.0A; VOUT = 3.3V; VIN = 5.0V)
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
0
120µF 6.3V Tantalum
Vishay P/N 594D127X96R3C2T
100 200 300 400
Time (µs)
7
6
5
4
3
2
1
0
-1
500
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