Datasheet > LM2608ATL-1.8

LM2608ATL-1.8

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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LM2608ATL-1.8 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LM2608ATL-1.8相关器件

型号	品牌	获取价格	描述	数据表
LM2608ATL-1.8/NOPB	TI	获取价格	IC,SMPS CONTROLLER,CURRENT/VOLTAGE,BGA,10PIN,PLASTIC
LM2608ATLX-1.3	NSC	获取价格	400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode
LM2608ATLX-1.3	TI	获取价格	0.518A SWITCHING REGULATOR, 690kHz SWITCHING FREQ-MAX, PBGA10, MICRO, SMD-10
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

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