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August 2005
FAN5331
High Ef?ciency Serial LED Driver and OLED Supply with
20V Integrated Switch
Features
Description
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1.6MHz Switching Frequency
Low Noise
Low R DS(ON) : 0.5 ?
Adjustable Output Voltage
1A Peak Switch Current
1W Output Power Capability
Low Shutdown Current: <1μA
Cycle-by-Cycle Current Limit
Over-Voltage Protection
Fixed-Frequency PWM Operation
Internal Compensation
5-lead SOT-23 Package
The FAN5331 is a general purpose, ?xed-frequency boost con-
verter designed to operate at high switching frequencies in
order to minimize switching noise measured at the battery ter-
minal of hand-held communications equipment. Quiescent cur-
rent in normal mode of operation as well as in shutdown mode
is designed to be minimal in order to extend battery life. Normal
mode of operation or shutdown mode can be selected by a logic
level shutdown circuitry.
The low ON-resistance of the internal N-channel switch ensures
high ef?ciency and low power dissipation. A cycle-by-cycle cur-
rent limit circuit keeps the peak current of the switch below a
typical value of 1A. The FAN5331 is available in a 5-lead SOT-
23 package.
Applications
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Cell Phones
PDAs
Handheld Equipment
Display Bias
LED Bias
Typical Application
V IN
C IN
2.7V to 5.5V
L
10μ H
BAT54
C OUT
V OUT
4.7 μ F
4.7 μ F
5
V IN
SW
1
R1
C F
120pF
FB
3
R2
ON
OFF
4
SHDN
GND
2
Figure 1. Typical Application Diagram
?2004 Fairchild Semiconductor Corporation
FAN5331 Rev. 1.0.1
1
www.fairchildsemi.com
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FAN5332ASX_NL 功能描述:LED照明驱动器 1.6MHz Boost regulator RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
FAN5333A 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:High Efficiency, High Current Serial LED Driver with 30V Integrated Switch
FAN5333ASX 功能描述:直流/直流开关转换器 SYSTEM_POWER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
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