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LM3686TLE-AAEF PDF预览

LM3686TLE-AAEF

更新时间： 2024-11-15 05:42:03
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
20页 1844K
描述
Step-Down DC-DC Converter with Integrated Post Linear Regulators System and Low-Noise Linear Regulator

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中文翻译

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LM3686TLE-AAEF 技术参数

生命周期：Transferred包装说明：VFBGA,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.64
其他特性：ALSO OPERATES AS LDO REGULATOR, ALSO HAS CONTROL TECHNIQUE OF PFM模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：2.7 V
标称输入电压：3.6 VJESD-30 代码：R-PBGA-B12
长度：2.49 mm功能数量：1
端子数量：12最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1.375 A
标称输出电压：3 V封装主体材料：PLASTIC/EPOXY
封装代码：VFBGA封装形状：RECTANGULAR
封装形式：GRID ARRAY认证状态：Not Qualified
座面最大高度：0.6 mm表面贴装：YES
切换器配置：BUCK最大切换频率：3000 kHz
温度等级：INDUSTRIAL端子形式：BALL
端子节距：0.5 mm端子位置：BOTTOM
宽度：1.74 mmBase Number Matches：1

LM3686TLE-AAEF 数据手册

 浏览型号LM3686TLE-AAEF的Datasheet PDF文件第2页浏览型号LM3686TLE-AAEF的Datasheet PDF文件第3页浏览型号LM3686TLE-AAEF的Datasheet PDF文件第4页浏览型号LM3686TLE-AAEF的Datasheet PDF文件第5页浏览型号LM3686TLE-AAEF的Datasheet PDF文件第6页浏览型号LM3686TLE-AAEF的Datasheet PDF文件第7页 
December 17, 2008  
LM3686  
Step-Down DC-DC Converter with Integrated Post Linear  
Regulators System and Low-Noise Linear Regulator  
General Description  
Features  
The LM3686 is a step-down DC-DC converter with one inte-  
grated very low dropout linear regulator and a low noise linear  
regulator optimized for powering ultra-low voltage circuits  
from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It pro-  
vides three outputs with combined load current up to 900 mA  
over an input voltage range from 2.7V to 5.5V.  
DC-DC REGULATOR  
VOUT_DCDC = 1.2V to 2.5V ( in 100 mV steps - factory  
programmed )  
■
600 mA maximum load capability (LILO = OFF)  
■
■
■
■
3 MHz PWM fixed switching frequency (typ.)  
The device offers superior features and performance for  
many applications. Automatic intelligent switching between  
PWM low-noise and PFM low-current mode offers improved  
system control. During full-power operation, a fixed-frequency  
3 MHz (typ.), PWM mode drives loads from ~70 mA to 600  
mA max. Hysteretic PFM mode extends the battery life  
through reduction of the quiescent current to 28 μA (typ.) at  
light load and system standby. Internal synchronous rectifi-  
cation provides high efficiency.  
Automatic PFM/PWM mode switching  
Internal synchronous rectification for high efficiency  
Internal soft start  
■
DUAL RAIL LINEAR REGULATOR: LILO  
Load transients < 50 mV peak typ.  
■
■
■
Line transients < 1 mV peak typ.  
VOUT_LILO = 0.7V to 2.0V ( in 50 mV steps - factory  
programmed )  
Three enable pins allow the separate operation of either the  
DC-DC, post-regulation linear regulator or the linear regulator  
alone. If the DC-DC is not enabled during startup of the post-  
regulation linear regulator, a parallel small pass transistor  
supplies the linear regulator from VBATT with maximal 50 mA.  
In the combined operation where both enables are raised to-  
gether, the small pass transistor is deactivated and the big  
pass transistor provides 350 mA output current. In shutdown  
mode (Enable pins pulled low), the device turns off and re-  
duces battery consumption to 2.5 μA (typ.).  
The LM3686 is available in a 12-bump micro SMD package.  
A high-switching frequency of 3 MHz (typ.) allows the use of  
a few tiny surface-mount components. Only six external sur-  
face-mount components, an inductor and five ceramic capac-  
itors, are required to establish a 15.66 mm2 total solution size.  
70 µA typical IQ from VIN_LILO  
■
■
350 mA Maximum Load Capability (Large FET)  
LINEAR REGULATOR: LDO  
Load transients < 80 mV peak typ.  
■
■
■
Line transients < 1 mV peak typ.  
VOUT_LDO = 1.5V to 3.3V ( in 100 mV steps - factory  
programmed )  
50 µA typical IQ  
■
■
300 mA Maximum Load Capability  
COMBINED GLOBAL FEATURES  
VBATT ≥ VOUT_LILO + 1.5V or 2.7V, whichever is higher  
■
■
■
900 mA maximum combined load capability  
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd  
batteries  
Only six tiny surface-mount external components required  
(one inductor, five ceramic capacitors)  
■
12–bump micro SMD  
■
■
■
100 µA Iq from VBATT  
15.66 mm2 total solution size  
Applications  
Moblie TV  
■
■
■
■
■
■
■
Hand-Held Radios  
Personal Digital Assistants  
Palm-top PCs  
Portable Instruments  
Battery-Powered Devices  
Portable Personal Clients  
© 2008 National Semiconductor Corporation  
300255  
www.national.com  
1234567...20

中文翻译

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