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AAT2784IRN-AAA-T1 Datasheet

  • AAT2784IRN-AAA-T1

  • 3-Channel Step-Down DC/DC Converter

  • 21頁

  • ANALOGICTECH

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PRODUCT DATASHEET
AAT2784
SystemPower
TM
General Description
The AAT2784 is a 3-channel 1.8MHz step-down con-
verter for applications where power efficiency and solu-
tion size are critical. The input voltage range is 2.7V to
5.5V and the outputs are adjustable from 0.6V to V
IN
.
Channel 3 delivers up to 1.5A output current and chan-
nels 1 and 2 deliver up to 300mA each. The AAT2784
uses a high switching frequency to minimize the size of
external components. The AAT2784 requires a minimum
of external components to realize a high efficiency triple-
output buck converter minimizing solution cost and PCB
footprint.
Each of the 3 regulators has an independent enable pin,
adjustable output voltage and operates with low no load
quiescent current, providing high efficiency over the
entire load range.
The AAT2784 is available in a Pb-free 16 pin TDFN34
package, and is rated over the -40擄C to +85擄C operating
temperature range.
3-Channel Step-Down DC/DC Converter
Features
鈥?V
IN
Range: 2.7 to 5.5V
鈥?Output Voltage Range: 0.6V to V
IN
鈥?Output Current:
鈻?/div>
Channel 3: 1.5A
鈻?/div>
Channel 1: 300mA
鈻?/div>
Channel 2: 300mA
鈥?Highly Efficient Step-Down Converters
鈥?Low R
DS(ON)
Integrated Power Switches
鈥?100% Duty Cycle
鈥?1.8 MHz Switching Frequency
鈥?Internal Soft Start
鈥?Fast 150渭s Turn-On Time
鈥?Over-Temperature Protection
鈥?Current Limit Protection
鈥?TDFN34-16 Package
鈥?-40擄C to 85擄C Temperature Range
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Cellular and Smart Phones
Digital Cameras
Handheld Instruments
Mass Storage Systems
Microprocessor / DSP Core / IO Power
PDAs and Handheld Computers
Portable Media Players
USB Devices
Wireless LAN
Typical Application
AAT2784
LX1
IN
R1
267 k
FB1
L2
4.7渭H
C3
4.7渭F
VOUT2: 3.3V
300mA
R2
59.0k
L1
4.7渭H
VOUT1: 3.3V
300mA
VIN : 2.7 鈥?5.5V
VP1_2
EN 1
LX2
R3
267k
FB2
R4
59.0k
C4
4.7渭F
C1
10渭F
EN2
PGND
L3
1.5渭H
VOUT3: 1.2V
1.5A
VP3
EN 3
C2
10渭F
LX3
R5
59.0k
FB3
R6
59.0k
AGND
PGND
C5
10渭F
2784.2007.11.1.1
www.analogictech.com
1

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