AME5269 Datasheet, PDF (1/18 Pages) Analog Microelectronics – 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter

AME
AME5269
2A, 28V, 340KHz Synchronous
Rectified Step-Down Converter
n General Description
n Features
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.
n Applications
l Distributed Power System
l Networking System
l FPGA, DSP, ASIC Power Supplies
l Notebook Computers
l 2A Output Current
l Wide 4.75V to 28V Operating Input Range
l Integrated Power MOSFET Switches
l Output Adjustable from 0.925V to 25V
l Up to 95% Efficiency
l Programmable Soft Start
l Stable with Low ESR Ceramic Output
Capacitors
l Cycle-by Cycle Over Current Protection
l Fixed 340KHz Frequency
l Input Under Voltage Lockout
l System Protected by Over-current Limiting,
Over-voltage Protection and Thermal shut
-down
l Green Products Meet RoHS Standards
C
n Typical Application
V_IN
12V
i e ^C5
10nF
C1
10µF/35V
x2
C4
0.1µ F
R4
100KΩ
IN
EN
BS
SW
AME5269
SS
GND
FB
COMP
C6
(Optional)
C3/3.3nF
R3/6.98KΩ
L1
15µH
R1
44.2KΩ
R2
10KΩ
V_OUT
5V
2A
S
C2
22µF/10V
x2
Rev. B.01
1