Datasheet > LM2618BTLX

LM2618BTLX

更新时间： 2024-11-23 00:01:07

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
16页	417K
描述
400mA Sub-miniature, High Efficiency, Synchronous PWM & PFM Programmable DC-DC Converter

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LM2618BTLX 数据手册

September 2002

LM2618

400mA Sub-miniature, High Efficiency, Synchronous

PWM & PFM Programmable DC-DC Converter

General Description

Key Specifications

n Operates from a single LiION cell (2.8V to 5.5V)

n Internal synchronous rectification provides high

efficiency in both PWM and PFM

The LM2618 step-down DC-DC converter is optimized for

powering low voltage circuits from a single Lithium-Ion cell. It

provides up to 400mA (300mA for B grade), over an input

voltage range of 2.8V to 5.5V. Pin programmable output

voltages of 1.80V, 1.83V, 1.87V or 1.92V allow adjustment

for MPU voltage options without board redesign or external

feedback resistors. Internal synchronous rectification pro-

vides high efficiency in both PWM and PFM operation.

n Pin programmable output voltage (1.80V, 1.83V, 1.87V

and 1.92V)

n 400mA maximum load capability (300mA for B grade)

2% PWM mode DC output voltage precision

n 5mV typ PWM mode output voltage ripple

n 180 µA typ PFM mode quiescent current

n 0.02µA typ shutdown mode current

The device has three pin-selectable modes for maximizing

battery life in mobile phones and similar portable applica-

tions. Low-noise PWM mode offers 600kHz fixed-frequency

operation to reduce interference in RF and data acquisition

applications during full-power operation. A SYNC input al-

lows synchronizing the switching frequency in a range of

500kHz to 1MHz to avoid noise from intermodulation with

system frequencies. Low-current hysteretic PFM mode re-

duces quiescent current to 180 µA (typ.) during system

standby. Shutdown mode turns the device off and reduces

battery consumption to 0.02µA (typ.). Additional features

include soft start and current overload protection.

n Internal synchronous rectification for high efficiency

(91% at 3.0V_IN, 1.92V_OUT

)

n 600kHz PWM mode switching frequency

n SYNC input for PWM mode frequency synchronization

from 500kHz to 1MHz

Features

n Sub-miniature 10-pin micro SMD package

n Only three tiny surface-mount external components

required

The LM2618 is available in a 10 pin micro SMD packge. This

package uses National’s wafer level chip-scale micro SMD

technology and offers the smallest possible size. Only three

small external surface-mount components, an inductor and

two ceramic capacitors are required.

n Uses small ceramic capacitors.

n Internal soft start

n Current overload protection

n Thermal Shutdown Protection

n No external compensation required

Applications

n Mobile Phones

n Hand-Held Radios

n Battery Powered Devices

Typical Application Circuit

20036402

DS200364

www.national.com

12 3 4 5 6 7...16

中文翻译

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与LM2618BTLX相关器件

型号	品牌	获取价格	描述	数据表
LM2618BTLX/NOPB	NSC	获取价格	IC,SMPS CONTROLLER,CURRENT/VOLTAGE,BGA,10PIN,PLASTIC
LM2619	NSC	获取价格	500mA Sub-Miniature Step-Down DC-DC Converter
LM2619	TI	获取价格	500-mA Sub-Miniature Step-Down DC-DC Converter
LM2619_03	NSC	获取价格	500mA Sub-Miniature Step-Down DC-DC Converter
LM2619_15	TI	获取价格	500-mA Sub-Miniature Step-Down DC-DC Converter
LM2619ATL	NSC	获取价格	500mA Sub-Miniature Step-Down DC-DC Converter
LM2619ATL/NOPB	TI	获取价格	500mA Sub-Miniature Step-Down DC-DC Converter 10-DSBGA -25 to 85
LM2619ATLX	NSC	获取价格	500mA Sub-Miniature Step-Down DC-DC Converter
LM2619MTC	NSC	获取价格	500mA Step-Down DC-DC Converter
LM2619MTC/NOPB	TI	获取价格	IC,SMPS CONTROLLER,CURRENT/VOLTAGE,TSSOP,14PIN,PLASTIC

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