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LM3676SDX-ADJ

更新时间： 2024-11-15 04:44:23

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器
页数	文件大小	规格书
20页	5210K
描述
2MHz, 600mA Step-Down DC-DC Converter with Mode Control

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LM3676SDX-ADJ 数据手册

December 2006

LM3676 2MHz, 600mA Step-Down DC-DC Converter with

Mode Control

General Description

Features

The LM3676 step-down DC-DC converter is optimized for

powering low voltage circuits from a single Li-Ion cell battery

and input voltage rails from 2.9V to 5.5V. It provides up to

600mA load current, over the entire input voltage range.

There are several different fixed voltage output options avail-

able as well as an adjustable output voltage version.

16 µA typical quiescent current

■

600 mA maximum load capability

2 MHz PWM fixed switching frequency (typ)

Automatic PFM/PWM mode switching or Forced PWM

mode

Available in fixed output voltages and adjustable version

■

The LM3676 has a mode-control pin that allows the user to

select continuous Forced PWM mode over the complete load

range or an intelligent PFM-PWM mode that changes modes

depending on the load. PWM mode offers superior efficiency

under high load conditions (>100mA) and the lowest output

noise performance. In Auto mode, PFM-PWM, hysteretic

PFM extends the battery life through reduction of the quies-

cent current to 16µA (typ.) during light loads and system

standby.

8-Lead non-pullback LLP package

Internal synchronous rectification for high efficiency

Internal soft start

0.01 µA typical shutdown current

Operates from a single Li-Ion cell battery

Only three tiny surface-mount external components

required (one inductor, two ceramic capacitors)

Current overload and Thermal shutdown protection

■

The LM3676 is available in a 8-lead non-pullback LLP pack-

age in leaded (PB) and lead-free (NO PB) versions. A high

switching frequency of 2 MHz (typ) allows use of tiny surface-

mount components, an inductor and two ceramic capacitors.

Applications

Mobile phones

■

PDAs

MP3 players

W-LAN

Portable instruments

Digital still cameras

Portable Hard disk drives

Typical Application Circuits

20176401

FIGURE 1. Typical Application Circuit

201764

www.national.com

12 3 4 5 6 7...20

中文翻译

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与LM3676SDX-ADJ相关器件

型号	品牌	获取价格	描述	数据表
LM3677	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677	TI	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677_08	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677_0810	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677_15	TI	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677LE-1.2	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677LE-1.2/NOPB	NSC	获取价格	IC 1.375 A SWITCHING CONTROLLER, 3500 kHz SWITCHING FREQ-MAX, PDSO6, 0.50 MM PITCH, LEAD F
LM3677LE-1.5	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677LE-1.8	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3677LE-1.82	NSC	获取价格	3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits

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