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| 型号： | FAN4855MTCX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC ADJ 0.5A 8TSSOP |
| 产品变化通告： | Product Discontinuation 03/Dec/2009 |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3 V ~ 5 V |
| 输入电压： | 1.6 V ~ 4.5 V |
| 电流 - 输出： | 500mA |
| 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： | 8-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-TSSOP |
December 2005
FAN4855
500mA High Ef?ciency Boost Regulator with Adjustable
Output, Shutdown and Low Battery Detect
Features
■ Low power PFM boost regulator
■ Input voltage range is from 1.6V to 4.5V
■ Output voltage range is from 3V to 5V
■ 500mA maximum load current capability
■ 95% ef?cient power conversion
■ 2-3 cell and single cell Li-Ion systems
■ Variable on-time Pulse Frequency Modulation (PFM)
■ Internal synchronous recti?er (no need for external
diode)
■ Low-battery detection
■ Logic controlled shutdown with true-load disconnect
■ Low (80μA) quiescent current
■ TSSOP-8 Package
General Description
The FAN4855 is a low power boost regulator designed
for low voltage DC to DC conversion in 2-cell battery
powered systems such as digital cameras, cell phones
and PDAs. The converter starts-up at 1.3V and operates
after the start at an input voltage as low as 1V. Output
voltage can be adjusted by external resistors from 3.3V
to 5V with a maximum load current of 0.5A. Quiescent
current in shut-down mode is less than 10μA, which
maximizes the battery live time. The ON time changes
with the input voltage to maintain the ripple current con-
stant and to provide the highest ef?ciency over a wide
load range—while maintaining low peak currents in the
boost inductor. The combination of built-in power transis-
tors, synchronous recti?cation and low supply current,
make the FAN4855 ideal for portable applications. The
FAN4855 is available in 8-lead TSSOP package.
Applications
■ DSCs
■ PDAs
■ Cell phones, smart phones
■ Portable instrumentations
■ 2-3 AA / AAA cells operated devices
■ Single cell Li-Ion operated devices
Ordering Information (T A = -40°C to +85°C)
Part Number
FAN4855MTC
FAN4855MTCX
Package
8 Pin TSSOP
8 Pin TSSOP
Packing
Rails
Tape and Reel
Typical Application
Input 1.6V
to 4.5V
FAN4855
On
Off
1 V IN
2 SHDN
GND 8
V L 7
Low Battery
Detect In
3 LBI
V OUT 6
Output 3.3V to 5V
up to 0.5A
Low Battery
Detect Out
?2005 Fairchild Semiconductor Corporation
FAN4855 Rev. 1.0.1
4 LB0
1
FB 5
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN4855MTCX | 制造商:Fairchild Semiconductor Corporation 功能描述:DC/DC Converter IC |
| FAN4855MU | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect |
| FAN4855MUX | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect |
| FAN4858TZ | 功能描述:数字总线开关 IC 600mA Ultralow Input Voltage Boost Switch RoHS:否 制造商:Texas Instruments 开关数量:24 传播延迟时间:0.25 ns 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:TSSOP-56 封装:Reel |
| FAN4860 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:3MHz, 5V Output Synchronous TinyBoosta?￠ Regulator |
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