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AME5283 Datasheet, PDF (1/20 Pages) Analog Microelectronics – Rectified Step-Down Converter | |||
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AME
AME5283
2A, 300KHz ~ 2MHz Synchronous
Rectified Step-Down Converter
n General Description
n Typical Application
The AME5283 is a Synchronous Rectified Step-Down
Converter with internal power MOSFETs. It achieves 2A
continuous 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. The circuit protection
includes cycle-by-cycle current limiting, output short cir-
cuit frequency protection and thermal shutdown. In shut-
down mode, the regulator reduces the current less than
1µA of supply current.
This device is available in SOP-8/PP and DFN-8C pack-
age with exposed pad for low thermal resistance.
L
VIN
2.2uH
5V
IN
SW
CIN
10uF
R4
100Kâ¦
AME5283
PGOOD
FB
EN
OFF ON
SS
P.G
COMP FREQ
R1
75Kâ¦
C3
C2
Optional
C1
680pF
GND
0.1uF
R3
25Kâ¦
RFREQ
18Kâ¦
VOUT
3.3V
COUT
22uF
R2
24Kâ¦
n Features
l 2A Output Current
l External Soft Start
l Stable with Low ESR Output Ceramic
Capacitors
l Up to 95% Efficiency
l Less than 1µA Shutdown Current
l Wide Switching Frequency Range from
300KHz~2MHz
l Thermal Shutdown
l Cycle by Cycle Over Current Protection
l Output Adjustable from 0.8V to VIN
l Short Circuit Protection
l Available in SOP-8, DFN-8C Package
l RoHS Compliant and Halogen Free
L
VIN
1.5uH
5V
IN
SW
CIN
10uF
R4
100Kâ¦
AME5283
PGOOD
FB
P.G OFF ON EN
SS
COMP FREQ
C2
Optional
C1
680pF
GND
R3
8.2 Kâ¦
RFREQ
18Kâ¦
R1
6Kâ¦
C3
0.1uF
V OUT
1V
COUT
22uF
R2
24Kâ¦
n Applications
l TV
l Distributed Power Systems
l Pre-Regulator for Linear Regulators
Rev. A.03
1
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