Datasheet > LM2608ATLX-1.3

LM2608ATLX-1.3

更新时间： 2024-11-22 22:30:47

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器开关
页数	文件大小	规格书
18页	724K
描述
400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode

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LM2608ATLX-1.3 数据手册

December 2002

LM2608

400mA Sub-miniature, High Efficiency, Programmable

DC-DC Converter with Linear Mode

General Description

Key Specifications

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

n Pin selectable output voltage (1.5V/1.8V or 1.3V/1.5V

versions), without external feedback resistors

n 400mA maximum load capability

The LM2608 step-down DC-DC converter is optimized for

powering ultra-low voltage circuits from a single Lithium-Ion

cell. It provides up to 400mA over an input voltage range of

2.8V to 5.5V. Operating from a 1.35V reference, this device

provides pin-selectable output voltages of 1.3V/1.5V

(300mA) for low voltage version or 1.5V/1.8V (400mA) for

high voltage version. This allows adjustment for DSP or CPU

voltage options, as well as dynamic output voltage switching

for reduced power consumption. Internal synchronous recti-

fication provides high efficiency.

1% PWM mode DC output voltage precision

(Excluding external reference tolerance)

n 5mV typ PWM mode output voltage ripple

n 20 µA typ quiescent current (Linear Mode)

n 0.02µA typ shutdown mode current

n Internal synchronous rectification for high efficiency

The LM2608 offers superior features and performance for

mobile phones and similar portable applications with com-

plex power management systems. Pin-selectable PWM low-

noise and linear micropower modes offer improved system

control for maximizing battery life. During full power opera-

tion, fixed-frequency PWM mode reduces interference in RF

and data acquisition applications by minimizing noise har-

monics at sensitive IF and sampling frequencies. A SYNC

input allows synchronizing the switching frequency in a

range of 500kHz to 1MHz to avoid noise from intermodula-

tion with system frequencies. Linear operation reduces qui-

escent current to 20µA (typ) during system standby for ex-

tended battery life. It provides up to 3 mA in the linear mode.

Shutdown reduces battery consumption to 0.02µA (typ.).

(91% at 2.8V_IN, 1.8V_OUT

)

n 600kHz PWM mode switching frequency

n SYNC input for PWM mode frequency synchronization

from 500kHz to 1MHz

n 15% accuracy for F_OSCand I_lim

Features

n Sub-miniature 10-pin thin Micro SMD package

n Only four tiny surface-mount external components

required

n Uses small ceramic capacitors

n Internal soft start

n Current and Thermal shutdown protection

n No external compensation required

The LM2608 is available in a 10 pin Micro SMD package.

This package uses National’s wafer level chip-scale Micro

SMD technology and offers the smallest possible size. A high

switching frequency (600KHz) allows use of tiny surface- Applications

mount components. Only four small external surface-mount

components, an inductor and three ceramic capacitors are

required. Pin selectable output voltage eliminates the need

for bulky external feedback resistors.

n Mobile Phones

n Hand-Held Radios

n Battery Powered Devices

Typical Application Circuit

20036602

DS200366

www.national.com

12 3 4 5 6 7...18

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与LM2608ATLX-1.3相关器件

型号	品牌	获取价格	描述	数据表
LM2608ATLX-1.3/NOPB	TI	获取价格	IC,SMPS CONTROLLER,CURRENT/VOLTAGE,BGA,10PIN,PLASTIC
LM2608ATLX-1.8	NSC	获取价格	400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode
LM2608ATLX-1.8/NOPB	TI	获取价格	400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode 10-DSB
LM260H	ETC	获取价格	Analog Comparator
LM260Z	SEOUL	获取价格	GREEN OVAL LAMP LED
LM261	NSC	获取价格	High Speed Differential Comparators
LM261	SEOUL	获取价格	INFRARED LAMP LED
LM2611	NSC	获取价格	1.4MHz Cuk Converter
LM2611	TI	获取价格	1.4MHz Cuk 转换器
LM2611_05	NSC	获取价格	1.4MHz Cuk Converter

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