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부품번호 | AAT2522 기능 |
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기능 | Step-Down Regulator | ||
제조업체 | Skyworks | ||
로고 | |||
전체 19 페이지수
DATA SHEET
AAT2522
Dual High-Current, Low-Noise, Step-Down Regulator
General Description
The AAT2522 is a SwitchReg, dual, high-current, step-
down converter with an input voltage range of 2.7V 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 compact footprint and high
efficiency make the AAT2522 an ideal choice for portable
applications.
The AAT2522 delivers load currents up to 3.0A maximum
output current per regulator. Ultra-low RDS(ON) integrated
MOSFETs and 100% duty cycle operation make the
AAT2522 an ideal choice for high output-voltage, high
current applications which require a low dropout thresh-
old.
The AAT2522 provides excellent transient response and
high output accuracy across the operating range. The
AAT2522’s unique architecture requires no external com-
pensation components, and produces reduced ripple and
spectral noise. Over-temperature and short-circuit pro-
tection safeguard the AAT2522 and system components
from damage.
The AAT2522 is available in a Pb-free, space-saving
16-pin 3mm x 4mm TDFN package. The product is rated
over an operating temperature range of -40°C to +85°C.
Features
• Dual 3.0A Peak Output Current Regulators
• 2.7V to 5.5V Input Voltage Range
• Adjustable Output Voltage (0.6V to VIN)
• 100% Duty-Cycle, Low-Dropout Operation
• Integrated 120mΩ High-Side Power MOSFET
• Integrated 85mΩ Low-Side Power MOSFET
• Low Noise Light Load Mode
• No External Compensation Required
• Very Low 90μA No-Load Operating Current
• <1μA Shutdown Current
• Up to 95% Efficiency
• 1.4MHz Switching Frequency
• Overload and Short-Circuit Protection
• Over-Temperature Protection
• Internal Voltage Ramped Soft-Start
• Temperature Range: -40°C to +85°C
• 16-pin 3mm x 4mm TDFN Package
Applications
• Digital Cameras and Camcorders
• Netbooks and Nettops
• Portable DVD and Media Devices
• Power-Over-Ethernet
• Set-Top Boxes
Typical Application
VIN
2.7V to 5.5V
ON/OFF
ON/OFF
IN1
VCC1
PGND1
LX1
FB1
EN1 AGND1
AAT2522
IN2
VCC2
PGND2
LX2
FB2
EN2 AGND2
EP
VOUT1
0.6V to VIN
VOUT2
0.6V to VIN
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202032A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
1
DATA SHEET
AAT2522
Dual High-Current, Low-Noise, Step-Down Regulator
Electrical Characteristics
CIN = 10μF, COUT = 22μF, L = 1.5μH. VIN1 = VIN2 = 3.6V, IN1 = VCC1 = EN1, IN2 = VCC2 = EN2, AGND = PGND. TA
= -40°C to 85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol Description
VIN
VOUT
VFB
Input Voltage Range
Output Voltage Range
Output Voltage Tolerance
FB Regulation Threshold
IQ No Load Supply Current
ISHDN
Shutdown Current
IFB FB Leakage Current
ΔVOUT(LOAD) Load Regulation
ΔVOUT/VIN Line Regulation
fOSC Oscillator Frequency
tSS Soft-Start Period
Protection Features
VUVLO
TSHDN
Input Under-Voltage Lockout
Over-Temperature Shutdown
Threshold
MOSFETs
RDS(ON)HI
High-Side P-Channel MOSFET
On-Resistance
ILIMPK
High-Side P-Channel MOSFET
Current Limit
RDS(ON)LO Low-Side N-Channel On-Resistance
Logic Input/Output Pins
VEN EN Input Logic Threshold
IEN EN Input Current
Conditions
IOUT = 0 to 3A, VIN = 2.7V to 5.5V
No Load, TA = 25°C
Including IN1, VCC1, IN2, and VCC2 supply
currents; No Load Current; not switching
EN = GND
VFB = 1.0V
0A to 3A Load
VIN = 2.7V to 5.5V
VIN Rising, Hysteresis = 0.25V
Hysteresis = 15°C
0V, VIN
Min
2.7
0.6
-3.0
591
3.61
0.6
-1.0
Typ
600
90
0.5
0.2
1.40
150
Max
5.5
VIN
+3.0
609
Units
V
V
%
mV
180 μA
1.0 μA
200 nA
%
%/V
MHz
μs
2.7
140
V
°C
120 mΩ
A
85 mΩ
1.4
+1.0
V
μA
1. Specified by design.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
4 202032A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
4페이지 DATA SHEET
AAT2522
Dual High-Current, Low-Noise, Step-Down Regulator
Typical Characteristics
Step-Down Converter Output Voltage Error
vs. Temperature
(VIN = 3.6V; VOUT = 2.5V)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0 IOUT = 1A
-1.5 IOUT = 1.5A
IOUT = 3A
-2.0
-50 -25 0 25 50 75 100
Temperature (°C)
Step-Down Converter Output Voltage Error
vs. Temperature
(VIN = 4.2V; VOUT = 3.3V)
2.0
1.5
IOUT = 1A
IOUT = 1.5A
1.0 IOUT = 2A
0.5 IOUT = 3A
0.0
-0.5
-1.0
-1.5
-2.0
-50 -25 0 25 50 75 100
Temperature (°C)
No Load Input Current vs. Input Voltage
(VEN1 = VEN2 = VIN)
130
120
110
100
90
80
70 85°C
60 25°C
-40°C
50
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)
Step-Down Converter Switching Frequency
vs. Input Voltage
(VOUT = 1.8V; IOUT = 1.5A)
5
4
3
2
1
0
-1
-2
-3
-4
-5
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
Step-Down Converter Switching Frequency
vs. Temperature
(VIN = 3.6V; VOUT = 1.8V; IOUT = 1.5A)
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
-40 -20 0 20 40 60 80 100
Temperature (°C)
Step-Down Converter Soft Start
(VIN = 3.6V; VOUT = 1.8V; IOUT = 1.5A; CFF = 100pF)
4
3
2
1
0
2
1
0
Time (100µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
202032A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
7
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부품번호 | 상세설명 및 기능 | 제조사 |
AAT2522 | Step-Down Regulator | Skyworks |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |