Datasheet > LM8801

LM8801

更新时间： 2024-11-02 05:42:23

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	959K
描述
High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications

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LM8801 数据手册

April 20, 2009

LM8801

High Precision 6MHz, 600 mA Synchronous Step-Down

DC-DC Converter for Mobile Applications

General Description

Features

The LM8801 step-down DC-DC converter is optimized for

powering ultra-low voltage circuits from a single Li-Ion cell and

input voltage rails from 2.3V to 5.5V. It provides up to 600 mA

load current over the entire input voltage range.

Over 90% efficiency at 6 MHz Operation

■

600 mA maximum load capability

6 MHz PWM fixed switching frequency (typ.)

27 µA (typ.) quiescent current in PFM mode

The LM8801 has a mode-control pin that allows the user to

select continuous PWM operation over the complete load

range or an auto PFM-PWM mode that changes modes au-

tomatically depending on the load. During PWM mode, the

device operates at a fixed-frequency of 6 MHz (typ.). In Auto

PFM-PWM mode, hysteretic PFM extends the battery life

through reduction of the quiescent current during light loads

and system standby.

Wide Input Voltage Range: 2.3V to 5.5V

±1.5% DC output voltage precision over temperature

Best-in-class load transient response

Low output ripple in PFM mode

Automatic PFM/PWM mode switching

Current overload and thermal shutdown protection

Internal soft-start

The LM8801 is available in a 6-bump micro SMD package.

Only three compact external surface-mount components, an

inductor and two capacitors, are required.

Micro SMD 6–bump package

(1.065 x 1.265 , 0.6 mm height)

Total solution size < 7mm²(works with 0402 capacitors)

■

UVLO

Applications

Mobile Phones

■

MP3 players

Wireless LAN

PDAs, Pocket PCs

Portable Hard Disk Drives

■

Typical Application Circuit

Efficiency vs. Output Current

(Auto Mode, V_OUT= 1.82V)

30082230

30082201

300822

www.national.com

12 3 4 5 6 7...16

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与LM8801相关器件

型号	品牌	获取价格	描述	数据表
LM8801_15	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TME-1.2/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TME-1.82	NSC	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TME-1.82/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TME-2.9/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TMX-1.2/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TMX-1.82	NSC	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TMX-1.82/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801TMX-2.9/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications
LM8801XUE-1.82/NOPB	TI	获取价格	High Precision 6MHz, 600 mA Synchronous Step-Down DC-DC Converter for Mobile Applications

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