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부품번호 | AAT2158 기능 |
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기능 | 1.5A Low Noise Step-Down Converter | ||
제조업체 | Advanced Analogic Technologies | ||
로고 | |||
전체 17 페이지수
SwitchRegTM
www.DataSheet4U.com
General Description
The AAT2158 SwitchReg is a 1.5A step-down converter
with an input voltage range of 2.4V to 5.5V and an
adjustable output voltage from 0.6V to VIN. The 1.4MHz
switching frequency enables the use of small external
components. The small footprint and high efficiency make
the AAT2158 an ideal choice for portable applications.
The AAT2158 delivers 1.5A maximum output current
while consuming only 42µA of no-load quiescent current.
Ultra-low RDS(ON) integrated MOSFETs and 100% duty
cycle operation make the AAT2158 an ideal choice for
high output voltage, high current applications which
require a low dropout threshold.
The AAT2158 provides excellent transient response and
high output accuracy across the operating range. No
external compensation components are required.
The AAT2158 maintains high efficiency throughout the
load range. The AAT2158’s unique architecture produces
reduced ripple and spectral noise. Over-temperature and
short-circuit protection safeguard the AAT2158 and sys-
tem components from damage.
The AAT2158 is available in a Pb-free, space-saving
16-pin 3x3mm QFN package. The product is rated over
an operating temperature range of -40°C to +85°C.
PRODUCT DATASHEET
AAT2158
1.5A Low Noise Step-Down Converter
Features
• 1.5A Maximum Output Current
• Input Voltage: 2.4V to 5.5V
• Output Voltage: 0.6V to VIN
• Up to 95% Efficiency
• Low Noise Light Load Mode
• 42µA No Load Quiescent Current
• No External Compensation Required
• 1.4MHz Switching Frequency
• 100% Duty Cycle Low-Dropout Operation
• Internal Soft Start
• Over-Temperature and Current Limit Protection
• <1µA Shutdown Current
• 16-Pin 3x3mm QFN Package
• Temperature Range: -40°C to +85°C
Applications
• Cellular Phones
• Digital Cameras
• Hard Disk Drives
• MP3 Players
• PDAs and Handheld Computers
• Portable Media Players
• USB Devices
Typical Application
3.3V
C1
10µF
U1
AAT2158
12 VP
FB 4
11 VP
LX 15
10 VP
LX 14
7 EN
LX 13
9 VCC
N/C 16
6 N/C PGND 3
8 N/C PGND 2
5 SGND PGND 1
L1
2.2µH
2.5V
R3
187k
R4
59k
C3
22µF
2158.2008.10.1.5
www.analogictech.com
1
PRODUCT DATASHEET
AAT2158
SwitchRegTM
www.DataSheet4U.com
1.5A Low Noise 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
VUVLO
VOUT
IQ
ISHDN
ILIM
RDS(ON)H
RDS(ON)L
DVLOADREG
DVLINEREG/DVIN
VFB
EN
IFB
FOSC
TS
TSD
THYS
VIL
VIH
IEN
Description
Input Voltage
Output Voltage Range
UVLO Threshold
Output Voltage Tolerance
Quiescent Current
Shutdown Current
Current Limit
High Side Switch On-Resistance
Low Side Switch On-Resistance
Load Regulation
Line Regulation
Feedback Threshold Voltage Accuracy
(Adjustable Version)
FB Leakage Current
Internal Oscillator Frequency
Start-Up Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Enable Leakage Current
Conditions
VIN Rising
Hysteresis
VIN Falling
IOUT = 0A to 1.5A, VIN = 2.4V to 5.5V
No Load
VEN = GND
ILOAD = 0A to 1.5A
VIN = 2.4V to 5.5V
No Load, TA = 25°C
VOUT = 1.0V
From Enable to Output Regulation
VIN = VEN = 5.5V
Min
2.4
0.6
1.8
-3.0
1.8
Typ
250
42
0.120
0.085
0.5
0.2
Max
5.5
VIN
2.4
3.0
90
1.0
Units
V
V
V
mV
V
%
µA
µA
A
W
W
%
%/V
0.591 0.60 0.609
V
0.2 µA
1.12 1.4 1.68 MHz
150 µs
140 °C
15 °C
1.4
-1.0
0.6 V
V
1.0 µA
1. The AAT2158 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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2158.2008.10.1.5
4페이지 Gill Sans MT Bold Italic
15/18, convert to outlines
SwitchRegTM
www.DataSheet4U.com
Typical Characteristics
Line Transient Response
(VOUT = 1.8V; IOUT = 1.5A; CFF = 100pF)
5.0 0.12
4.5 0.10
4.0 0.08
3.5 0.06
3.0 0.04
2.5 0.02
2.0 0.00
1.5 -0.02
1.0 -0.04
Time (100µs/div)
Enable Soft SVtINar=t4.2V
VIN(V=IN2=.7V3.6V;VVINO=UT3=.61V.8V; IOUT = 1.5A)
EN
(2V/div)
VOUT
(1V/div)
IIN
(500mA/div)
Time (100µs/div)
Light Load Switching Waveform
(VIN = 3.6V; VOUT = 1.8V; IOUT = 1mA; CFF = 0pF)
80 0.7
40 0.6
0 0.5
-40 0.4
-80 0.3
-120
0.2
-160
0.1
-200
0.0
-240
-0.1
Time (5µs/div)
PRODUCT DATASHEET
AAT2158
1.5A Low Noise Step-Down Converter
Line Regulation
(VOUT = 1.8V; IOUT = 1A)
0.40
0.30
0.20
0.10
0.00
-0.10
-0.20
-0.30
-0.40
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Input Voltage (V)
Heavy Load Switching WVIaN v=e4f.2oVrm
(VVIINN == 32..67VV; VOVUTIN==13.8.6VV; IOUT = 1.5A)
4.0 2.6
2.0 2.4
0.0 2.2
-2.0 2.0
-4.0 1.8
-6.0 1.6
-8.0 1.4
-10.0
1.2
-12.0
1.0
Time (500ns/div)
Light Load Switching Waveform
(VIN = 3.6V; VOUT = 1.8V; IOUT = 1mA; CFF = 0pF)
80 0.7
40 0.6
0 0.5
-40 0.4
-80 0.3
-120
0.2
-160
0.1
-200
0.0
-240
-0.1
Time (200µs/div)
2158.2008.10.1V.5IN = 2.7V
VIN = 4.2V
VIN = 3.6V
www.analogictech.com
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
7
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부품번호 | 상세설명 및 기능 | 제조사 |
AAT2153 | 2.5A Low Noise Step-Down Converter | Advanced Analogic Technologies |
AAT2158 | 1.5A Low Noise Step-Down Converter | Advanced Analogic Technologies |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |