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LM3686TLX-AADW PDF预览

LM3686TLX-AADW

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输出元件
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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LM3686TLX-AADW 技术参数

是否Rohs认证： 符合生命周期：Transferred
包装说明：FBGA, BGA12,3X4,20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.64其他特性：ALSO OPERATES IN PWM AND PFM CONTROL TECHNIQUE; TWO OUTPUTS OF 2.8 V AND 1.8 V
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：HYSTERETIC CURRENT MODE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 V
JESD-30 代码：R-PBGA-B12长度：2.49 mm
湿度敏感等级：1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：1.2 V封装主体材料：PLASTIC/EPOXY
封装代码：FBGA封装等效代码：BGA12,3X4,20
封装形状：RECTANGULAR封装形式：GRID ARRAY, FINE PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：3400 kHz
温度等级：INDUSTRIAL端子形式：BALL
端子节距：0.5 mm端子位置：BOTTOM
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：1.74 mm
Base Number Matches：1

LM3686TLX-AADW 数据手册

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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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