LM2621

更新时间： 2024-11-25 12:06:07

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
17页	1035K
描述
LM2621 Low Input Voltage, Step-Up DC-DC Converter

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LM2621 数据手册

LM2621

www.ti.com

SNVS033C –MAY 2004–REVISED MARCH 2005

LM2621 Low Input Voltage, Step-Up DC-DC Converter

Check for Samples: LM2621

FEATURES

DESCRIPTION

The LM2621 is a high efficiency, step-up DC-DC

switching regulator for battery-powered and low input

voltage systems. It accepts an input voltage between

1.2V and 14V and converts it into a regulated output

voltage. The output voltage can be adjusted between

1.24V and 14V. It has an internal 0.17Ω N-Channel

MOSFET power switch. Efficiencies up to 90% are

achievable using the LM2621.

•

Small VSSOP8 Package (Half the Footprint of

Standard 8-Pin SOIC Package)

•

1.09 mm Package Height

Up to 2 MHz Switching Frequency

1.2V to 14V Input Voltage

1.24V - 14V Adjustable Output Voltage

Up to 1A Load Current

The high switching frequency (adjustable up to 2MHz)

of the LM2621 allows for tiny surface mount inductors

and capacitors. Because of the unique constant-duty-

cycle gated oscillator topology very high efficiencies

are realized over a wide load range. The supply

current is reduced to 80µA because of the BiCMOS

process technology. In the shutdown mode, the

supply current is less than 2.5µA.

0.17 Ω Internal MOSFET

Up to 90% Regulator Efficiency

80 µA Typical Operating Current

<2.5µA Ensured Supply Current In Shutdown

APPLICATIONS

•

PDAs, Cellular Phones

2-Cell and 3-Cell Battery-Operated Equipment

PCMCIA Cards, Memory Cards

Flash Memory Programming

TFT/LCD Applications

The LM2621 is available in a VSSOP-8 package.

This package uses half the board area of a standard

8-pin SOIC and has a height of just 1.09 mm.

3.3V to 5.0V Conversion

GPS Devices

Two-Way Pagers

Palmtop Computers

Hand-Held Instruments

Typical Application Circuit

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...17

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LM2621 替代型号

型号	品牌	替代类型	描述	数据表
LM3224	TI	功能相似	615kHz/1.25MHz 升压 PWM 直流/直流转换器
LM27313	TI	功能相似	LM27313/LM27313-Q1
LM2733	TI	功能相似	40V DMOS FET Switch, 1.6 MHz (âXâ), 0.6 M

与LM2621相关器件

型号	品牌	获取价格	描述	数据表
LM2621_05	NSC	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621_14	TI	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621_15	TI	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621MDC	NSC	获取价格	IC 2.85 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator
LM2621MM	TI	获取价格	LM2621 Low Input Voltage, Step-Up DC-DC Converter
LM2621MM	NSC	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621MM/NOPB	TI	获取价格	1.2V to 14V input voltage, 1A load current, step-up DC-DC 8-VSSOP -40 to 85
LM2621MMX	TI	获取价格	LM2621 Low Input Voltage, Step-Up DC-DC Converter
LM2621MMX	NSC	获取价格	Low Input Voltage, Step-Up DC-DC Converter
LM2621MMX/NOPB	TI	获取价格	1.2V to 14V input voltage, 1A load current, step-up DC-DC 8-VSSOP -40 to 85

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