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AAT1152 Datasheet, PDF (1/18 Pages) Advanced Analogic Technologies – 850kHz 1A Synchronous Buck DC/DC Converter | |||
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AAT1152
850kHz 1A Synchronous Buck DC/DC Converter
General Description
The AAT1152 SwitchReg⢠is a member of
AnalogicTechâ¢'s Total Power Management⢠IC
product family. The Step-down switching converter
is ideal for applications where high efficiency, small
size, and low ripple are critical. Able to deliver 1A
with internal Power MOSFETs, the current-mode
controlled IC provides high efficiency using syn-
chronous rectification. Fully internally compensat-
ed, the AAT1152 simplifies system design and low-
ers external part count.
The AAT1152 features a Power Good (POK) func-
tion which monitors the output, alerting the system
if the output voltage falls out of regulation.
The AAT1152 is available in MSOP-8 package,
rated over -40 to 85°C.
Features
SwitchRegâ¢
⢠5.5V max supply input
⢠Fixed output voltage: 1.1Vâ4.2V with 100 mV
increment
⢠1A output current
⢠Integrated low on resistance power switches
⢠Synchronous rectification
⢠Up to 95% efficiency
⢠Power Good signal
⢠Internally compensated current mode control
⢠High initial accuracy: ±1%
⢠850kHz switching frequency
⢠Constant PWM mode
⢠Low output ripple with light load
⢠Internal softstart
⢠Current limit protection
⢠Over-Temperature protection
⢠MSOP-8 package
Typical Application
INPUT
100k
10µF
100â¦
0.1µF
Applications
⢠Computer Peripherals
⢠Set Top Boxes
⢠Network Cards
⢠Cable/DSL Modems
⢠High efficiency conversion from 5V or 3.3V
supply
VP
AAT1152 FB
POK
LX
ENABLE
VCC
SGND
PGND
4.1µH
47µF
OUTPUT
1152.2003.01.0.9
1
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