AME
AME5286
3A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter
n General Description
n Typical Application
...
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 circuit frequency protection and thermal shutdown. In shutdown mode, the
regulator reduces the current less than 1µA of supply current.
V IN 5V
CIN 10µF
P.G
C2 Optional
IN SW
R4 100KΩ
AME5286
PGOOD EN OFF ON
FB SS
COMP FREQ
C1 680pF
GND
R3 25KΩ
RFREQ 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 package 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 VIN 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 VIN 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
RFREQ ...