AME
AME5269
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General Description
The AME5269 is a fixed frequency monolithic synchro-
nous buck regulator that accepts input voltage from 4.75V
to 28V. Two NMOS switches with low on-resistance are
integrated on the die. Current mode topology is used for
fast transient response and good loop stability.
Shutdown mode reduces the input supply current to less
than 1µA. An adjustable soft-start prevents inrush current
at turn-on.
This device is available in SOP-8 package.
2A, 28V, 340KHz Synchronous
Rectified Step-Down Converter
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Features
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2A Output Current
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Wide 4.75V to 28V Operating Input Range
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Integrated Power MOSFET Switches
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Output Adjustable from 0.925V to 25V
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Up to 95% Efficiency
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Programmable Soft Start
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Stable with Low ESR Ceramic Output
Capacitors
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Cycle-by Cycle Over Current Protection
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Fixed 340KHz Frequency
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Applications
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Distributed Power System
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Networking System
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FPGA, DSP, ASIC Power Supplies
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Notebook Computers
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Input Under Voltage Lockout
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System Protected by Over-current Limiting,
Over-voltage Protection and Thermal Shut-
down
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Green Products Meet RoHS Standards
C
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Typical Application
V
IN
12V
C1
10µF/35V
x2
R4
100KΩ
IN
EN
BS
SW
ie
C5
10nF
V
OUT
5V
2A
L1
15µH
R1
44.2KΩ
AME52 69
SS
GND
FB
COMP
S
C2
22µF/10V
x2
C4
0.1µF
C6
(Optional)
C3/3.3nF
R3/6.98KΩ
R2
10KΩ
Rev. A.01
1
AME [ ANALOG MICROELECTRONICS ]
