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APW7060 PDF预览

APW7060

更新时间: 2024-09-15 22:14:39
品牌 Logo 应用领域
茂达 - ANPEC 控制器
页数 文件大小 规格书
16页 180K
描述
Dual Controllers - Step Down Synchronous PWM and Linear Controller

APW7060 数据手册

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APW7060  
Dual Controllers - Step Down Synchronous PWM and Linear Controller  
Features  
General Description  
The APW7060 integrates a synchronous buck PWM  
controller and a linear controller to provide two regu-  
lated voltages in a single package. The PWM control-  
ler drives external N-channel MOSFETs and operates  
at a fixed 600kHz frequency. When the input supply  
drops close to the output, the upper MOSFET remains  
on, achieving 100% duty cycle. Internal loop compen-  
sation is optimized for fast transient response, elimi-  
nating external compensation network. The linear con-  
troller drives an external N-channel MOSFET to form a  
linear regulator. The internal 0.8V reference makes this  
part suitable for a wide variety of low voltage  
applications.  
Provides Two Regulated Voltages  
- One Synchronous DC/DC Buck Controller  
- One Linear Controller  
0.8V Internal Reference Voltage  
- Both Controllers: 0.8V ± 2% Line, Load  
and Temp.  
Output Voltage Range  
- PWM Controller : 0.8V to VIN  
- Linear Controller : 0.8V to (12VCC-VGSpass  
Full Duty Cycle Range for PWM Controller  
- 0% to 100%  
)
The APW7060 has an undervoltage lockout circuitry  
to ensures that both the 5VCC and 12VCC must be  
present before its internal circuitry is power up. Soft  
start is internally set to 2ms and will bring both out-  
puts into regulation in a controlled manner. When ei-  
ther output goes into short, soft start will be initiated.  
If the short condition still remains after three cycles,  
both regulators will be shut down. To restart both  
regulators, recycle the voltage at 5VCC or 12VCC pin  
or momentarily pull the FB2 pin above 1.28V.  
The APW7060 can be shutdown by pulling the FB2  
pin above 1.28V. In shutdown, all gate drive signals  
will be low. This dual controller is available in SO-14  
package.  
Internal Loop Compensation for PWM Controller  
Internal 2ms Soft Start and Short Circuit Protec  
tion for both Controllers  
Both Controllers Drive N-Channel MOSFETs  
Small Converter Size  
- 600kHz Constant Switching Frequency  
- Simple SO-14 Package  
Shutdown Control  
Applications  
Motherboard  
Pinouts  
Graphics Cards  
1
2
3
4
5
6
7
UGATE  
12VCC  
NC  
12V, 5V and 3.3V Inputs DC-DC Converter  
DSP Supplies  
14  
13  
12  
11  
10  
9
LGATE  
GND  
GND  
5VCC  
DRIVE2  
FB2  
Embedded processor and I/O supplies  
NC  
NC  
FB  
NC  
8
NC  
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise  
customers to obtain the latest version of relevant information to verify before placing orders.  
Copyright ANPEC Electronics Corp.  
Rev. A.3 - Oct., 2003  
1
www.anpec.com.tw  

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