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AAT1150 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1150
기능 1MHz 1A Step-Down DC/DC Converter
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AAT1150 데이터시트, 핀배열, 회로
AAT1150
1MHz 1A Step-Down DC/DC Converter
General Description
The AAT1150 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 1A with internal power MOSFETs,
the current-mode controlled IC provides high effi-
ciency using synchronous rectification. Fully inter-
nally compensated, the AAT1150 simplifies system
design and lowers external parts count.
The AAT1150 is available in an MSOP-8 package
and is rated over the -40°C to +85°C temperature
range.
Features
SwitchReg
• VIN Range: 2.7V to 5.5V
• Up to 95% Efficiency
• 110mRDS(ON) MOSFET Switch
• <1.0µA of Shutdown Current
• 1MHz Switching Frequency
• Fixed or Adjustable VOUT: 1.0V to 4.2V
• High Initial Accuracy: ±1%
• 1.0A Peak Current
• Integrated Power Switches
• Synchronous Rectification
• Internally Compensated Current Mode Control
• Constant PWM Mode for Low Output Ripple
• 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
• Cable/DSL Modems
• Computer Peripherals
• High Efficiency Conversion From 5V or 3.3V
Supply
• Network Cards
• Set-Top Boxes
VP
AAT1150
FB
ENABLE
LX
VCC
SGND
PGND
4.1µH
2x 22µF
OUTPUT
1150.2005.03.1.2
1




AAT1150 pdf, 반도체, 판매, 대치품
AAT1150
1MHz 1A Step-Down DC/DC Converter
Electrical Characteristics
VIN = VCC = VP = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Description
Conditions
VIN
VOUT
VOUT (VOUT*VIN)
VOUT/VOUT
VUVLO
VUVLO(HYS)
IQ
ISHDN
ILIM
RDS(ON)H
RDS(ON)L
η
VEN(L)
VEN(H)
IEN
FOSC
TSD
THYS
Input Voltage Range
Output Voltage Tolerance
Load Regulation
Line Regulation
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Quiescent Supply Current
Shutdown Current
Current Limit
High Side Switch On Resistance
Low Side Switch On Resistance
Efficiency
Enable Low Voltage
Enable High Voltage
Enable Pin Leakage Current
Oscillator Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
VIN = VOUT + 0.3 to 5.5V,
IOUT = 0 to 1A
VIN = 4.2V, ILOAD = 0 - 1A
VIN = 2.7 to 5.5V
VIN Rising
VIN Falling
No Load, VFB = 0
VEN = 0V, VIN = 5.5V
TA = 25°C
TA = 25°C
TA = 25°C
VIN = 5V, VOUT = 3.3V,
IOUT = 600mA
VIN = 2.7 to 5.5V
VIN = 2.7 to 5.5V
VEN = 5.5V
TA = 25°C
Min Typ Max Units
2.7 5.5 V
-4.0 4.0 %
3.0 %
0.2 %/V
2.5 V
1.2
250 mV
160 300 µA
1.0 µA
1.2 A
110 150 m
100 150 m
93 %
0.6 V
1.4 V
1.0 µA
700 1000 1200 kHz
140 °C
15 °C
4 1150.2005.03.1.2

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AAT1150 전자부품, 판매, 대치품
AAT1150
1MHz 1A Step-Down DC/DC Converter
Typical Characteristics
No Load Input Current vs. Temperature
(VCC = VP)
12
VCC = 5.5V VCC = 5.0V
10
8
6
4
VCC = 4.2V VCC = 3.6V
VCC = 2.7V
2
0
-20
-5 10
25 40
55 70
85
Temperature (°C)
Non-Switching IQ vs. Temperature
(FB = 0V; VP = VCC)
200
190
180
170
160
150
140
130
120
110
100
-20
VCC = 5.5V
VCC = 5.0V
VCC = 2.7V
VCC = 3.6V
VCC = 4.2V
-5 10 25 40 55 70 85
Temperature (°C)
Switching Waveform
(VIN = 3.6V; VOUT = 1.5V; IOUT = 1.2A)
V(LX)
2V/div
IL
500mA/div
Transient Response
(VIN = 3.6V; VOUT = 1.5V; ILOAD = 0.25 to 1.2A)
VOUT
50mV/div
Inductor Current
500mA/div
500nsec/div
Output Ripple
(VIN = 3.6V; VOUT = 1.5V; IOUT = 0A)
VOUT
5mV/div
BW = 20MHz
LX
2V/div
500nsec/div
1150.2005.03.1.2
20µs/div
Output Ripple
(VIN = 3.6V; VOUT = 1.5V; IOUT = 1A)
VOUT
5mV/div
BW = 20MHz
LX
2V/div
500nsec/div
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