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参数资料
| 型号： | FT441AA |
| 厂商： | Fremont Micro Devices USA |
| 文件页数： | 1/10页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.9 A SOT23 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 900mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 包装： | 标准包装 |
| 供应商设备封装： | SOT-23-5 |
| 其它名称： | 1219-1078-6 |
Fremont Micro Devices
FT441
1.5MHz, 900mA Synchronous Step-Down Converter
FEATURES
DESCRIPTION
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High Efficiency - Up to 95%
Guaranteed 900mA Output Current
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Frequency Operation
No external Schottky Diode Needed
Adjustable Output Voltages From 0.6V to VIN
Fixed Output Voltage Options Available
100% Duty Cycle Low-Dropout Operation
0.1 μ A Shutdown Current
SOT23-5 Package
The FT441 is a 1.5MHz constant frequency, slope
compensated current mode step down converter. It is
ideal for portable equipment requiring very high
current up to 0.9A from single-cell Lithium-ion
batteries while still achieving over 90% efficiency
during peak load conditions.
The FT441 integrates a main switch and a
synchronous rectifier for high efficiency without an
external Schottky diode. The FT441 automatically
turns off the synchronous rectifier to increase
TYPICAL APPLICATIONS
efficiency while enters discontinuous PWM mode.
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Cellular phones
DSP Core Supplies
XDSL Applications
USB Powered Modems
Digital Still Cameras
Portable Instruments
PC Cards and Notebooks
The FT441 can run at 100% duty cycle for low
dropout operation, maximizing battery life in portable
application. FT441 consumes less than 1uA when
enter shutdown mode.
The FT441 is available in a fixed output voltages of
1.2V, 1.5V, and 1.8V, and is also available in an
adjustable
output
voltage
version
capable
of
generating output voltages from 0.6V to VIN .The
FT441 is available in a 5-pin SOT23-5 package.
www.fremontmicro.com
Page 1 of 10
DS441-A2
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