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LM3668SDX-2833/NOPB PDF预览

LM3668SDX-2833/NOPB

更新时间： 2024-11-15 01:04:31
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德州仪器 - TI 开关光电二极管
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30页 4205K
描述
1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter

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LM3668SDX-2833/NOPB 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Not Recommended包装说明：HVSON, SOLCC12,.12,16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：8.32模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：2.5 V
标称输入电压：3.6 VJESD-30 代码：S-PDSO-N12
JESD-609代码：e3长度：3 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：2.05 A
标称输出电压：2.8 V封装主体材料：PLASTIC/EPOXY
封装代码：HVSON封装等效代码：SOLCC12,.12,16
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BUCK-BOOST
最大切换频率：2700 kHz温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.4 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

LM3668SDX-2833/NOPB 数据手册

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Sample &  
Buy  
Support &  
Community  
Product  
Folder  
Tools &  
Software  
Technical  
Documents  
LM3668  
SNVS449O –JUNE 2007–REVISED APRIL 2015  
LM3668 1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter  
1 Features  
2 Applications  
1
•
•
45-µA Typical Quiescent Current  
•
•
•
•
•
•
Handset Peripherals  
MP3 Players  
For 2.8-V-3.3-V and 3-V-3.4-V Versions:  
Pre-Regulation for Linear Regulators  
PDAs  
–
–
–
1-A Maximum Load Current for  
VIN = 2.8 V to 5.5 V  
800-mA Maximum Load Current for  
VIN = 2.7 V  
Portable Hard Disk Drives  
WiMax Modems  
600-mA Maximum Load Current for  
VIN = 2.5 V  
3 Description  
•
For 4.5 V-5 V  
The LM3668 is a synchronous buck-boost DC-DC  
converter optimized for powering low voltage circuits  
from a Li-Ion battery and input voltage rails between  
2.5 V and 5.5 V. It has the capability to support up to  
1-A output current over the output voltage range. The  
LM3668 regulates the output voltage over the  
complete input voltage range by automatically  
switching between buck or boost modes depending  
on the input voltage.  
–
–
–
–
1-A Maximum Load Current for  
VIN = 3.9 V to 5.5 V  
800-mA Maximum Load Current for  
VIN = 3.4 V to 3.8 V  
700-mA Maximum Load Current for  
VIN = 3 V to 3.3 V  
600-mA Maximum Load Current for  
VIN = 2.7 V to 2.9 V  
The LM3668 has 2 N-channel MOSFETS and 2 P-  
channel MOSFETS arranged in a topology that  
provides continuous operation through the buck and  
boost operating modes. There is a MODE pin that  
allows the user to choose between an intelligent  
automatic PFM-PWM mode operation and forced  
•
•
2.2-MHz PWM Fixed Switching Frequency  
(Typical)  
Automatic PFM-PWM Mode or Forced PWM  
Mode  
PWM operation. During PWM mode,  
a fixed-  
•
•
Wide Input Voltage Range: 2.5 V to 5.5 V  
frequency 2.2 MHz (typical) is used. PWM mode  
drives load up to 1 A. Hysteretic PFM mode extends  
the battery life through reduction of the quiescent  
current to 45 µA (typical) at light loads during system  
standby. Internal synchronous rectification provides  
high efficiency. In shutdown mode (EN pin pulled  
low), the device turns off and reduces battery  
consumption to 0.01 µA (typical).  
Internal Synchronous Rectification for High  
Efficiency  
•
Internal Soft Start: 600-µs Maximum Start-Up  
Time After VIN Settled  
•
•
0.01-µA Typical Shutdown Current  
Current Overload and Thermal Shutdown  
Protection  
A high switching frequency of 2.2 MHz (typical)  
allows the use of tiny surface-mount components  
including a 2.2-µH inductor, a 10-µF input capacitor,  
and a 22-µF output capacitor.  
•
Frequency Sync Pin: 1.6 MHz to 2.7 MHz  
Typical Application Circuit  
VIN = 2.5V - 5.5V  
Device Information(1)  
C1  
10 PF  
VDD  
SW1  
PVIN  
VOUT  
2.8V/3.3V  
PART NUMBER  
LM3668  
PACKAGE  
BODY SIZE (NOM)  
FB  
2.2 PH  
WSON (12)  
3.00 mm x 3.00 mm  
LM3668  
C2  
22 PF  
SW2  
SYNC/MODE  
(1) For all available packages, see the orderable addendum at  
the end of the datasheet.  
L = 2.8V  
H = 3.3V  
EN  
NC  
VSEL  
SGND PGND  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
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LM3668SDX-2833/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM3668SD-2833/NOPB TI

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 1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter

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