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AP1513

更新时间: 2024-09-27 22:40:59
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易亨 - ANACHIP 转换器
页数 文件大小 规格书
7页 186K
描述
PWM Control 2A Step-Down Converter

AP1513 数据手册

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AP1513  
PWM Control 2A Step-Down Converter  
„ Features  
„ General Description  
- Input voltage: 3.6V to 18V.  
AP1513 consists of step-down switching regulator  
with PWM control. These devices include a reference  
voltage source, oscillation circuit, error amplifier,  
internal PMOS and etc.  
- Output voltage: 0.8V to VCC  
.
- Duty ratio: 0% to 100% PWM control  
- Oscillation frequency: 300KHz typ.  
- Soft-start, Current limit, Enable function  
- Thermal Shutdown function  
AP1513 provides low-ripple power, high efficiency,  
and excellent transient characteristics. The PWM  
control circuit is able to vary the duty ratio linearly  
from 0 up to 100%. This converter also contains an  
error amplifier circuit as well as a soft-start circuit that  
prevents overshoot at startup. An enable function,  
an over current protect function and a short circuit  
protect function are built inside, and when OCP or  
SCP happens, the operation frequency will be  
reduced from 300KHz to 30KHz. Also, an internal  
compensation block is built in to minimum external  
component count.  
- Built-in internal SW P-channel MOS  
- SOP-8L Pb-Free Package.  
„ Applications  
- PC Motherboard  
- LCD Monitor  
- Graphic Card  
- DVD-Video Player  
- Telecom Equipment  
- ADSL Modem  
- Printer and other Peripheral Equipment  
- Microprocessor core supply  
- Networking power supply  
With the addition of an internal P-channel Power MOS,  
a coil, capacitors, and a diode connected externally,  
these ICs can function as step-down switching  
regulators. They serve as ideal power supply units for  
portable devices when coupled with the SOP–8L  
mini-package, providing such outstanding features as  
low current consumption. Since this converter can  
accommodate an input voltage up to 18V, it is also  
suitable for the operation via an AC adapter.  
„ Pin Assignments  
„ Pin Descriptions  
Name  
Pin  
Description  
FB  
1
Feedback pin.  
Power-off pin  
H: Normal operation  
(Step-down operation)  
L: Step-down operation  
stopped  
Vss  
1
2
3
4
8
7
6
5
FB  
EN  
2
Vss  
EN  
(All circuits deactivated)  
Add an external resistor to set  
max output current.  
IC power supply pin  
Switch Pin. Connect external  
inductor/diode here. Minimize  
trace area at this pin to reduce  
EMI.  
AP1513  
OCSET  
3
4
Output  
OCSET  
VCC  
V
CC  
Output  
56  
78  
Output  
VSS  
GND Pin  
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of  
this product. No rights under any patent accompany the sale of the product.  
Rev. 1.3 Nov 17, 2005  
1/7  

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