AME5285 Datasheet, PDF (1/16 Pages) Analog Microelectronics – Rectified Step-Down Converter

AME
AME5285
5A, 300KHz ~ 1.4MHz Synchronous
Rectified Step-Down Converter
n General Description
The AME5285 is a Synchronous Rectified Step-Down
Converter with internal power MOSFETs. It achieves 5A
continous output current over a wide switching frequency
range with excellent load and line regulation.
Current mode operation provides fast transient response
and eases of loop stabilization. Internal soft-start mini-
mizes the inrush supply current at startup. The circuit
protection includes cycle-by cycle current limiting, out-
put short circuit frequency protection and thermal shut-
down.
This device is available in SOP-8/PP package with ex-
posed pad for low thermal resistance.
n Features
l 5A Output Current
l 55mΩ/45mΩ Internal Power MOSFET Switch
l Stable with Low ESR Output Ceramic Capacit
-ors
l Up to 95% Efficiency
l Less than 10µA Shutdown Current
l Wide Switching Frequency Range from
300KHz~1.4MHz
l Thermal Shutdown
l Cycle by cycle Over Current Protection and
Hiccup
l Output Adjustable from 0.8V to V_IN
l Short Circuit Frequency Protection
l Green Products Meet RoHS Standards
n Applications
l TV
l Distributed Power Systems
l Pre-Regulator for Linear Regulators
n Typical Application
VIN
5V
C_IN
10µF
IN
SW
EN
OFF ON _AME5285
C2
Optional
C1
680pF
R3
5.1K
FB
COMP
GND ^FREQ
RFREQ
30K
L1
1.5µH
R1
6K
R2
24K
VOUT
1V 5A
C_OUT
22µF
Rev. B.01
1