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AP1601

更新时间: 2024-11-17 21:55:39
品牌 Logo 应用领域
易亨 - ANACHIP 转换器
页数 文件大小 规格书
9页 207K
描述
Step-Up DC/DC Converter

AP1601 数据手册

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AP1601  
Step-Up DC/DC Converter  
„ Features  
„ General Description  
-A Guaranteed Start-Up from less than 0.9 V.  
-High Efficiency.  
The AP1601 is a high efficiency step-up DC/DC  
converter for applications using 1 to 4 NiMH battery  
cells. Only three external components are required  
to deliver a fixed output voltage of 3.3V or 5V. The  
AP1601 starts up from less than 0.9V input with  
1mA load. Pulse Frequency Modulation scheme  
brings optimized performance for applications with  
light output loading and low input voltages. The  
output ripple and noise are lower compared with the  
circuits operating in PSM mode.  
-Low Quiescent Current.  
-Less Number of External Components needed.  
-Low Ripple and Low Noise.  
-Space Saving Packages: MSOP-8L and  
MSOP-10L.  
„ Applications  
The PFM control circuit operating in 100KHz (max.)  
switching rate results in smaller passive  
components. The space saving MSOP packages  
make the AP1601 an ideal choice of DC/DC  
converter for space conscious applications, like  
pagers, electronic cameras, and wireless  
microphones.  
-Pagers.  
-Cameras.  
-Wireless Microphones.  
-Pocket Organizers.  
-Battery Backup Suppliers.  
-Portable Instruments.  
„ Pin Assignments  
„ Pin Descriptions  
Name  
Description  
Use a resistor network to set the output  
voltage from +2.0V to +5.5V.  
1
8
OUT  
LX  
GND  
SHDN  
FB  
LBI  
LBO  
REF  
FB  
If FB=Vout, Vout=3.3V fix voltage  
FB=GND, Vout=5V fix voltage  
2
3
4
7
6
5
Low-Battery Comparator Input. Internally set  
to trip at +1.30V.  
LBI  
Open-Drain Low-Battery Comparator Output.  
MSOP-8L  
Connect LBO to OUT through a 100k  
resistor. Output is low when VLBI is <1.2V.  
LBO  
LBO is high impedance during shutdown.  
1.2V Reference Voltage. Bypass with a 0.1µF  
capacitor.  
1
10  
FB  
OUT  
LX  
LBI  
2
3
4
5
9
8
7
6
REF  
OUT  
LX  
GND  
LBO  
Power Output. OUT provides bootstrap power  
to the IC.  
BATT  
SHDN  
CLSEL  
REF  
N-Channel and P-Channel Power MOSFET  
Drain  
MSOP-10L  
GND Ground  
Shutdown Input. Drive high (>80% of VOUT) for  
operating mode. Drive low (<20% of VOUT) for  
shutdown mode. Connect to OUT for normal  
operation.  
SHDN  
Current-Limit Select Input. CLSEL = OUT sets  
CLSEL the current limit to 0.8A. CLSEL = GND sets  
the current limit to 0.4A.  
Battery  
Input  
and  
Damping  
Switch  
BATT Connection. If damping switch is unused,  
leave BATT unconnected.  
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. 1.1 Apr. 14, 2005  
1/9  

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