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FAN5602 PDF预览

FAN5602

更新时间: 2024-01-29 01:18:09
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 转换器
页数 文件大小 规格书
16页 616K
描述
Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter

FAN5602 数据手册

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www.fairchildsemi.com  
FAN5602  
Universal (Step-Up/Step-Down) Charge Pump  
Regulated DC/DC Converter  
Features  
Description  
• Low Noise Constant Frequency Operation at Heavy Load  
• High Efficiency Pulse-Skip (PFM) Operation at Light  
Load  
• Adaptive Seven Switch Configurations (1:3, 1:2, 2:3, 1:1,  
3:2, 2:1, 3:1)  
• 92% Peak Efficiency  
• Input Voltage Range: 2.7V to 5.5V  
• Output Current:3.3V, 200mA at VIN = 3.6V  
The FAN5602 is a universal switched capacitor DC/DC con-  
verter capable of step-up or step-down operation. Due to its  
unique adaptive fractional switching topology, the device  
achieves high efficiency over a wider input/output voltage  
range than any of its predecessors. The FAN5602 utilizes  
resistance modulated loop control, which produces lower  
switching noise than other topologies. Depending upon  
actual load conditions, the device automatically switches  
between constant frequency and pulse skipping (PFM)  
modes of operation in order to extend battery life. The  
FAN5602 produces a fixed regulated output within the range  
of 2.7V to 5.5V from any type of voltage source. High effi-  
ciency is achieved under any input/output voltage conditions  
because an internal logic circuitry automatically reconfigures  
the system to the best possible topology. Only two 1µF  
bucket capacitors and one 10µF output capacitor are needed.  
During power on soft start circuitry prevents excessive cur-  
rent drawn from the supply. The device is protected against  
short circuit and over temperature conditions.  
3% Output Voltage Accuracy  
• ICC < 1µA in Shutdown Mode  
• 1MHz Operating Frequency  
• Shutdown Isolates Output from Input  
• Soft-Start Limits Inrush Current at Start-up  
• Short Circuit and Over Temperature Protection  
• Minimum External Component Count  
• No Inductors  
Applications  
• Cell Phones  
• Handheld Computers  
The FAN5602 is available with 3.3V, 4.5V, and 5.0V output  
voltage. Any other output voltage option within the 1.5V to  
5V range is available upon request. The FAN5602 is avail-  
able in 8-lead MSOP and 3x3mm 8-lead MLP packages  
• Portable RF Communication Equipment  
• Core Supply to Low Power Processors  
• Low Voltage DC Bus  
• DSP Supplies  
Typical Application  
Input 2.7V to 5.5V  
V
IN  
ENABLE  
1
2
8
C2+  
C2-  
C
IN  
V
OUT  
6
7
FAN5602  
C1+  
C1-  
C
B
C
OUT  
3
4
5
GND  
REV. 1.1 10/7/04  

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