Datasheet > LM3679_15

LM3679_15

更新时间： 2024-11-16 01:08:51

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德州仪器 - TI		/
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描述
3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height 0.55mm)

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LM3679_15 数据手册

LM3679

www.ti.com

SNVS510A –SEPTEMBER 2007–REVISED FEBRUARY 2008

LM3679 3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile

Applications (Height < 0.55mm)

Check for Samples: LM3679

FEATURES

APPLICATIONS

•

16 µA Typical Quiescent Current

•

Mobile Phones

PDAs

•

350 mA Maximum Load Capability

3 MHz PWM Fixed Switching Frequency (typ)

Automatic PFM/PWM Mode Switching

MP3 Players

W-LAN

Available in 5-Bump DSBGA YZR Package and

YPD Package

Portable Instruments

Digital Still Cameras

Portable Hard Disk Drives

•

Internal Synchronous Rectification for High

Efficiency

•

Internal Soft Start

DESCRIPTION

The LM3679 step-down DC-DC converter is

optimized for powering ultra-low voltage circuits from

a single Li-Ion cell battery and input voltage rails from

2.5V to 5.5V. It provides up to 350mA load current,

over the entire input voltage range. The LM3679

output voltage can be configured to 1.2V, 1.5V, or

1.8V.

0.01 µA Typical Shutdown Current

Operates from a Single Li-Ion Cell Battery

Current Overload and Thermal Shutdown

Protection

•

Three External Components Required for

Typical Applications

Low Profile Solution (0.55mm Max Height,

Includes Four External Components)

TYPICAL APPLICATION CIRCUIT

2.5V to 5.5V

L1: 1.0 mH

OUT

10 mF

4.7 mF

LM3679

GND

Bill of Materials for Low Profile Solution:

CIN = JMK107BJ475K (Taiyo - Yuden)

COUT = JMK107BJ475K (Taiyo - Yuden) x2

Inductor = LQM21PN1R0MC0 (MuRata)

Figure 1. Typical Low Profile Application Circuit

(0.55mm max height using LM3679UR)

Figure 2. Efficiency vs. Output Current (V_OUT

1.8V)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...24

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与LM3679_15相关器件

型号	品牌	获取价格	描述	数据表
LM3679TL-1.8	NSC	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height
LM3679TL-1.8/NOPB	ROCHESTER	获取价格	1.075A SWITCHING REGULATOR, 3500kHz SWITCHING FREQ-MAX, PBGA5, 0.60 MM HEIGHT, 0.50 MM PIT
LM3679TL-1.8/NOPB	NSC	获取价格	IC 1.075 A SWITCHING REGULATOR, 3500 kHz SWITCHING FREQ-MAX, PBGA5, 0.60 MM HEIGHT, 0.50 M
LM3679TL-1.8/NOPB	TI	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications 5-DSBGA
LM3679TLX-1.8	NSC	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height
LM3679TLX-1.8/NOPB	NSC	获取价格	IC 1.075 A SWITCHING REGULATOR, 3500 kHz SWITCHING FREQ-MAX, PBGA5, 0.60 MM HEIGHT, 0.50 M
LM3679UR-1.2	NSC	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height
LM3679UR-1.2/NOPB	NSC	获取价格	IC 1.075 A SWITCHING REGULATOR, 3500 kHz SWITCHING FREQ-MAX, PBGA5, 0.60 MM HEIGHT, 0.50 M
LM3679UR-1.2/NOPB	TI	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height
LM3679UR-1.5	NSC	获取价格	3MHz, 350mA Miniature Step-Down DC-DC Converter for Ultra Low Profile Applications (Height

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