Datasheet > LM2773

LM2773

更新时间： 2024-09-25 04:19:03

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器开关
页数	文件大小	规格书
12页	326K
描述
Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM2773 数据手册

January 22, 2008

LM2773

Low-Ripple 1.8V/1.6V Spread-Spectrum Switched

Capacitor Step-Down Regulator

General Description

Features

The LM2773 is a switched capacitor step-down regulator that

produces a selectable 1.8V or 1.6V output. It is capable of

supplying loads up to 300mA. The LM2773 operates with an

input voltage from 2.5V to 5.5V, accommodating 1-cell Li-Ion

batteries and chargers.

Low-Noise Spread Spectrum Operation

■

1.8V/1.6V Selectable Output Voltage

2% Output Voltage Regulation

> 75% Efficiency in 1.8V Mode

Very Low Output Ripple: 10mV @ 300mA

Output Currents up to 300mA

The LM2773 utilizes a regulated charge pump with gains of

2/3x and 1x. It has very low ripple and noise on both the input

and output due to its pre-regulated 1.15MHz (typ.) switching

frequency and spread spectrum operation. When output cur-

rents are low, the LM2773 automatically switches to a low-

ripple PFM regulation mode to maintain high efficiency over

the entire load range.

2.5V to 5.5V Input Voltage Range

Shutdown Disconnects Load from V_IN

1.15MHz Switching Frequency

No Inductors…Small Solution Size

Short Circuit and Thermal Protection

0.5mm pitch, µSMD-9 (1.511 × 1.511mm × 0.6mm)

The LM2773 is available in National’s 0.5mm pitch 9-bump

Micro-SMD (µSMD-9).

Applications

Power Supply for DSP's, Memory, and Microprocessors

■

Mobile Phones and Pagers

Digital Cameras, Portable Music Players, and Other

Portable Electronic Devices

Typical Application Circuit

LM2773 Efficiency vs.

Low-Dropout Linear Regulator (LDO) Efficiency

30047401

30047410

300474

www.national.com

12 3 4 5 6 7...12

中文翻译

下载PDF

与LM2773相关器件

型号	品牌	获取价格	描述	数据表
LM2773_15	TI	获取价格	LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
LM2773TL	NSC	获取价格	Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
LM2773TL/NOPB	TI	获取价格	LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
LM2773TLX	NSC	获取价格	Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
LM2773TLX/NOPB	TI	获取价格	LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
LM2775	TI	获取价格	LM2775 Switched Capacitor 5-V Boost Converter
LM2775_15	TI	获取价格	LM2775 Switched Capacitor 5-V Boost Converter
LM2775DSGR	TI	获取价格	LM2775 Switched Capacitor 5-V Boost Converter
LM2775DSGT	TI	获取价格	LM2775 Switched Capacitor 5-V Boost Converter
LM2775-Q1	TI	获取价格	汽车级、2.7V 至 5.5V 输入电压、200mA 输出电流、5V 固定输出电压加倍器