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PDF ACE722G Data sheet ( Hoja de datos )
| Número de pieza | ACE722G | |
| Descripción | 1.3MHz Synchronous Buck Converter | |
| Fabricantes | ACE Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ACE722G (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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ACE722G
5V 2.0A, 1.3MHz Synchronous Buck Converter
Description
The ACE722G is a high-efficiency, DC-to-DC step-down switching regulators, capable of delivering
up to 2A of output current. The device operates from an input voltage range of 2.5V to 6.0V and provides
an output voltage from 0.6V to VIN, making the ACE722G ideal for low voltage power conversions.
Running at a fixed frequency of 1.3MHz allows the use of small external components, such as ceramic
input and output caps, as well as small inductors, while still providing low output ripples. This low noise
output along with its excellent efficiency achieved by the internal synchronous rectifier, making ACE722G
an ideal green replacement for large power consuming linear regulators. Internal soft-start control circuitry
reduces inrush current. Short-circuit and thermal-overload protection improves design reliability. The
ACE722G is available in a SOT23-6 Package
Features
High Efficiency: Up to 97%
Capable of Delivering 2A
1.3MHz Switching Frequency
No External Schottky Diode Needed
Light-load Mode
Internal Compensation and Soft-Start
Current Mode control
0.6V Reference for Low Output voltages
Logic Control Shutdown (IQ<1uA)
Thermal shutdown and UVLO
Available in SOT23-6
Application
Digital Cameras
MP3 and MP4 players
Set top boxes
Wireless and DSL Modems
USB supplied Devices in Notebooks
Portable Devices.
VER 1.1 1
1 page  
ACE722G
5V 2.0A, 1.3MHz Synchronous Buck Converter
Typical Characteristics
(Typical values are at TA=25°°C unless otherwise specified)
1. Efficiency
2. Load Regulation
VER 1.1 5
5 Page 
ACE722G
5V 2.0A, 1.3MHz Synchronous Buck Converter
Output Capacitor and Inductor Selection
Follow the below table for Inductor and Output cap selection:
VOUT 1.2V
1.5V 1.8V 2.5V
COUT 33 F 33 F 22 F 22 F
L 1.5 H 1.5 H 2.2 H 3.3 H
3.3V
10 F
4.7 H
If much smaller values are used, inductor current rises, and a larger output capacitance may be required
to suppress output ripple. Larger values than LIDEAL can be used to obtain higher output current, but
typically with larger inductor size.
Application Information
Layout is critical to achieve clean and stable operation. The switching power stage requires particular
attention. Follow these guidelines for good PC board layout:
(1) Place decoupling capacitors as close to the IC as possible
(2) Connect input and output capacitors to the same power ground node with a star ground configuration
then to IC ground.
(3) Keep the high-current paths as short and wide as possible. Keep the path of switching current
(C1 to IN and C1 to GND) short. Avoid vias in the switching paths.
(4) If possible, connect IN, SW, and GND separately to a large copper area to help cool the IC to further
improve efficiency and long-term reliability.
(5) Ensure all feedback connections are short and direct. Place the feedback resistors as close to the IC
as possible.
(6) Route high-speed switching nodes away from sensitive analog area.
VER 1.1 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ACE722G.PDF ] | |
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