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AAT1151IKS-2.5-T1

Description
850kHz 700mA Synchronous Buck DC/DC Converter
CategoryPower/power management    The power supply circuit   
File Size528KB,16 Pages
ManufacturerAAT [Advanced Analog Technology, Inc.]
Environmental Compliance
Download Datasheet Parametric View All

AAT1151IKS-2.5-T1 Overview

850kHz 700mA Synchronous Buck DC/DC Converter

AAT1151IKS-2.5-T1 Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerAAT [Advanced Analog Technology, Inc.]
package instructionTSSOP, TSSOP8,.19
Reach Compliance Codeunknow
control modeCURRENT-MODE
JESD-30 codeR-PDSO-G8
Humidity sensitivity level1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current0.7 A
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP8,.19
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Certification statusNot Qualified
surface mountYES
Maximum switching frequency850 kHz
Temperature levelINDUSTRIAL
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Base Number Matches1
850kHz 700mA Synchronous
Buck DC/DC Converter
General Description
The AAT1151 SwitchReg™ is a step-down switch-
ing converter ideal for applications where high effi-
ciency is required over the full range of output load
conditions. The 2.7V to 5.5V input voltage range
makes the AAT1151 ideal for single-cell lithium-
ion/polymer battery applications. Capable of more
than 700mA with internal MOSFETs, the current-
mode controlled IC provides high efficiency using
synchronous rectification. Fully integrated compen-
sation simplifies system design and lowers external
parts count.
The device operates at a fixed 850kHz switching fre-
quency and enters Pulse Frequency Modulation
(PFM) mode for light load current to maintain high
efficiency across all load conditions.
The AAT1151 is available in Pb-free MSOP-8 and
QFN33-16 packages and is rated over the -40°C to
+85°C temperature range.
AAT1151
Features
SwitchReg
V
IN
Range: 2.7V to 5.5V
Up to 95% Efficiency
High Initial Accuracy ±1%
110mΩ R
DS(ON)
Internal Switches
<1μA Shutdown Current
850kHz Switching Frequency
Fixed V
OUT
or Adjustable V
OUT
≥1.0V
Integrated Power Switches
Synchronous Rectification
Current Mode Operation
Internal Compensation
Stable with Ceramic Capacitors
PFM for Optimum Efficiency for All Load
Conditions
Internal Soft Start
Over-Temperature Protection
Current Limit Protection
MSOP-8 and QFN33-16 Packages
-40°C to +85°C Temperature Range
Applications
Cellular Phones
Digital Cameras
MP3 Players
Notebook Computers
PDAs
USB-Powered Equipment
Wireless Notebook Adapters
Typical Application
INPUT
10μF
VP
FB
AAT1151
LX
ENABLE
100Ω
VCC
3.0μH
OUTPUT
SGND
0.1μF
PGND
2x 22μF
1151.2007.01.1.6
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