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AAT1140 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1140
기능 Fast Transient 600mA Step-Down Converter
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AAT1140 데이터시트, 핀배열, 회로
SwitchRegTM
PRODUCT DATASHEET
AAT1140
Fast Transient 600mA Step-Down Converter
General Description
The AAT1140 SwitchReg is a 1.4MHz step-down con-
verter with an input voltage range of 2.7V to 5.5V and
output voltage as low as 0.6V. It is optimized to react
quickly to a load variation.
The AAT1140 is available in fixed voltage versions with
internal feedback and a programmable version with
external feedback resistors. It can deliver 600mA of load
current while maintaining a low 35μA no load quiescent
www.DatacSuhrereet4nUt..coTmhe 1.4MHz switching frequency minimizes the
size of external components while keeping switching
losses low.
The AAT1140 is designed to maintain high efficiency
throughout the operating range, which is critical for por-
table applications.
The AAT1140 is available in a Pb-free SOT23-5 package
and is rated over the -40°C to +85°C temperature
range.
Features
• VIN Range: 2.7V to 5.5V
• VOUT Fixed or Adjustable from 0.6V to VIN
• 35μA No Load Quiescent Current
• Up to 98% Efficiency
• 600mA Max Output Current
• 1.4MHz Switching Frequency
• 120μs Soft Start
• Fast Load Transient
• Over-Temperature Protection
• Current Limit Protection
• 100% Duty Cycle Low-Dropout Operation
• <1μA Shutdown Current
• SOT23-5 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 (Fixed Output Voltage)
VIN
C2
4.7µF
U1
AAT1140
IN LX
EN
GND
OUT
L1
4.7µH
VOUT
C1
4.7µF
1140.2007.12.1.1
www.analogictech.com
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AAT1140 pdf, 반도체, 판매, 대치품
SwitchRegTM
PRODUCT DATASHEET
AAT1140
Fast Transient 600mA 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
www.DataSheeVt4OUUT.com Output Voltage Tolerance
VOUT
Output Voltage Range
IQ Quiescent Current
ISHDN
Shutdown Current
ILIM P-Channel Current Limit
RDS(ON)H High Side Switch On Resistance
RDS(ON)L Low Side Switch On Resistance
ILXLEAK LX Leakage Current
ΔVLinereg Line Regulation
VOUT
Out Threshold Voltage Accuracy
IOUT Out Leakage Current
ROUT
Out Impedance
TS Start-Up Time
FOSC Oscillator Frequency
TSD Over-Temperature Shutdown Threshold
THYS Over-Temperature Shutdown Hysteresis
EN
VEN(L)
VEN(H)
IEN
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
Min Typ Max
VIN Rising
Hysteresis
VIN Falling
IOUT = 0 to 600mA, VIN = 2.7V to 5.5V
No Load, 0.6V Adjustable Version
EN = AGND = PGND
2.7
1.8
-3.5
0.6
750
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
>0.6V Output
From Enable to Output Regulation
TA = 25°C
588
250
1.0
5.5
2.7
160
+3.5
VIN
35 70
1.0
0.53
0.40
0.1
600
1
612
0.2
150
1.4 2.0
140
15
VIN = VOUT = 5.5V
1.4
-1.0
0.6
1.0
Units
V
V
mV
V
%
V
μA
μA
mA
Ω
Ω
μA
%/V
mV
μA
kΩ
μs
MHz
°C
°C
V
V
μA
1. The AAT1140 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.
4
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1140.2007.12.1.1

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AAT1140 전자부품, 판매, 대치품
SwitchRegTM
Typical Characteristics
No Load Quiescent Current vs. Input Voltage
(VOUT = 1.8V, L = 4.7µH)
0.060
0.055
TA = 85°C
0.050
0.045
TA = 25°C
0.040
www.DataShee0t.403U5.com
0.030
0.025
TA = -40°C
0.020
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
P-Channel RDS(ON) vs. Input Voltage
800
700
600
500
400
300
200
2.7
85°C
-40°C
25°C
3.1 3.5 3.9 4.3 4.7
Input Voltage (V)
5.1
5.5
Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 1.8V;
C1 = 10μF; CFF = 100pF)
2.0
1.9 VO
1.8
1.7
IO
300mA
IL 1mA
0
Time (50μs/div)
PRODUCT DATASHEET
AAT1140
Fast Transient 600mA Step-Down Converter
No Load Quiescent Current vs. Input Voltage
(VOUT = 1.2V, L = 2.2µH)
0.060
0.055
0.050
0.045
TA = 25°C
TA = 85°C
0.040
0.035
0.030
0.025
TA = -40°C
0.020
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
N-Channel RDS(ON) vs. Input Voltage
700
600
500
400
300
200
100
2.7
85°C
-40°C
25°C
3.1 3.5 3.9 4.3 4.7 5.1
Input Voltage (V)
5.5
Load Transient Response
(300mA to 400mA; VIN = 3.6V;
VOUT = 1.8V; C1 = 4.7μF)
1.90
1.85 VO
1.80
1.75 IO
400mA
300mA
IL
Time (50μs/div)
0.4
0.3
0.2
0.1
1140.2007.12.1.1
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