AME5286 Datasheet, PDF (1/20 Pages) Analog Microelectronics – Rectified Step-Down Converter

AME
AME5286
3A, 300KHz ~ 2MHz Synchronous
Rectified Step-Down Converter
n General Description
n Typical Application
The AME5286 is a Synchronous Rectified Step-Down
Converter with internal power MOSFETs. It achieves 3A
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.
V IN
5V
C_IN
10µF
P.G
C2
Optional
IN
SW
R4
100KΩ
AME5286
PGOOD
FB
EN
OFF ON
SS
COMP ^FREQ
C1
680pF
GND
R3
25KΩ
R_FREQ
18KΩ
L
2.2µH
R1
75KΩ
C3
0.1µF
VOUT
3.3V
COUT
22µF
R2
24KΩ
This device is available in SOP-8/PP and DFN-8C pack-
age with exposed pad for low thermal resistance.
n Features
l 3A 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 V_IN
l Short Circuit Protection
l Available in SOP-8, DFN-8C Package
l RoHS Compliant and Halogen Free
Figure 1.
3.3V at 3A Step-Down Regulators
L
V_IN
1.5µH
5V
IN
SW
CIN
10µF
R4
100KΩ
AME5286
PGOOD
FB
EN
P.G ^{OFF ON}
SS
COMP ^FREQ
C₂
Optional
C1
680pF
GND
R3
8.2KΩ
R_FREQ
18KΩ
R1
6KΩ
C3
0.1µF
VOUT
1V
COUT
22µF
R2
24KΩ
Figure 2.
1V at 3 A Step-Down Regulators
n Applications
l TV
l Distributed Power Systems
l Pre-Regulator for Linear Regulators
Rev. A.02
1