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PDF ACE727C Data sheet ( Hoja de datos )
| Número de pieza | ACE727C | |
| Descripción | 2A Synchronous Step-Down Converter | |
| Fabricantes | ACE Technology | |
| Logotipo |  |
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ACE727C
600KHz, 16V, 2A Synchronous Step-Down Converter
Description
The ACE727C is a fully integrated, high– efficiency 2A synchronous rectified step-down converter. The
ACE727C operates at high efficiency over a wide output current load range.
This device offers two operation modes, PWM control and PFM Mode switching control, which allows a
high efficiency over the wider range of the load.
The ACE727C requires a minimum number of readily available standard external components and is
available in a 6-pin SOT23 ROHS compliant package.
Features
• High Efficiency: Up to 96%
• 600KHz Frequency Operation
• 2A Output Current
• No Schottky Diode Required
• 3.5V to 18V Input Voltage Range
• 0.6V Reference
• Slope Compensated Current Mode Control for Excellent Line and Load Transient Response
• Integrated internal compensation
• Stable with Low ESR Ceramic Output Capacitors
• Over Current Protection with Hiccup-Mode
• Thermal Shutdown
• Inrush Current Limit and Soft Start
• Available in SOT23-6
• -40°C to +85°C Temperature Range
Application
• Distributed Power Systems
• Digital Set Top Boxes
• Flat Panel Television and Monitors
• Wireless and DSL Modems
• Notebook Computer
Absolute Maximum Ratings
Parameter
Max Unit
Supply Voltage VIN
-0.3~20
V
Switch Node Voltage VSW
-0.3~VIN+0.5 V
Boost Voltage VBS
VSW -0.3~VSW+5 V
All other pins
-0.3~6
V
Operating Temperature Range
-40~85
OC
Storage Temperature Range
-65~+150
OC
Lead Temperature (Soldering, 10s)
300
OC
VER 1.2 1
1 page  
ACE727C
600KHz, 16V, 2A Synchronous Step-Down Converter
APPLICATIONS INFORMATION
Setting Output Voltages
The external resistor divider is used to set the output voltage (see Typical Application on page 1). The
feedback resistor R1 also sets the feedback loop bandwidth with the internal compensation capacitor.
Choose R1 to be around 100kΩ for optimal transient response. R2 is then given by:
Selecting the Inductor
A 4.7μH to 22μH inductor with a DC current rating of at least 25% percent higher than the maximum load
current is recommended for most applications. For highest efficiency, the inductor DC resistance should
be less than 15mΩ. For most designs, the inductance value can be derived from the following equation.
Where ΔIL is the inductor ripple current. Choose inductor ripple current to be approximately 30% if the
maximum load current, 2A. The maximum inductor peak current is:
Under light load conditions below 100mA, larger inductance is recommended for improved efficiency.
VER 1.2 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ACE727C.PDF ] | |
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