Datasheet > LM3668

LM3668

更新时间： 2024-09-27 02:58:39

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
30页	4205K
描述
1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM3668 数据手册

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

•

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

V_IN= 2.8 V to 5.5 V

800-mA Maximum Load Current for

V_IN= 2.7 V

Portable Hard Disk Drives

WiMax Modems

600-mA Maximum Load Current for

V_IN= 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

V_IN= 3.9 V to 5.5 V

800-mA Maximum Load Current for

V_IN= 3.4 V to 3.8 V

700-mA Maximum Load Current for

V_IN= 3 V to 3.3 V

600-mA Maximum Load Current for

V_IN= 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 V_INSettled

•

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⁾

10 PF

VDD

SW1

PVIN

VOUT

2.8V/3.3V

PART NUMBER

LM3668

PACKAGE

BODY SIZE (NOM)

2.2 PH

WSON (12)

3.00 mm x 3.00 mm

LM3668

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

VSEL

SGND PGND

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.

12 3 4 5 6 7...30

中文翻译

下载PDF

与LM3668相关器件

型号	品牌	获取价格	描述	数据表
LM3668_08	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668_0809	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668_15	TI	获取价格	1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668-Q1	TI	获取价格	1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668-Q1_15	TI	获取价格	1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668QDNTRQ1	TI	获取价格	1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668SD-2833	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668SD-2833/NOPB	TI	获取价格	1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
LM3668SD-3.3	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter
LM3668SD-3034	NSC	获取价格	1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter

与LM3668相关文章

塔塔电子与力积电达成技术转让协议，携手建设印度首座晶圆厂
2024-09-29

9
英特尔震撼发布：128核心256线程的至强6性能核处理器
2024-09-29

8
SK海力士量产12层HBM3E，容量高达36GB
2024-09-27

12
意法半导体传感器驱动Sphere，开启沉浸式电影新时代
2024-09-27

19

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3668

LM3668 数据手册

与LM3668相关器件

与LM3668相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3668

LM3668 数据手册

与LM3668相关器件

与LM3668相关文章

您还可以找

您在本页遇到什么问题？