Datasheet > LM2773

LM2773

更新时间： 2024-09-26 02:58:15

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德州仪器 - TI		/
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描述
LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator

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LM2773 数据手册

LM2773

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SNVS554A –JANUARY 2008–REVISED MAY 2013

LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator

Check for Samples: LM2773

FEATURES

DESCRIPTION

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 currents 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, DSBGA-9 (1.511 × 1.511mm ×

0.6mm)

The LM2773 is available in TI's 0.5mm pitch 9-bump

DSBGA.

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

: 1.8V or 1.6V

up to 300 mA

= 2.5V to

5.5V

OUT

4.7 mF

1 mF

GND

LM2773

C2+

C1+

1 mF

C2-

C1-

SEL

Capacitors: 1 mF - C1005 (0402), X5R, 6.3V

4.7 mF - C1608 (0603), X5R, 6.3V

or equivalent

Figure 1.

Figure 2. LM2773 Efficiency vs.

Low-Dropout Linear Regulator (LDO) Efficiency

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...18

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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

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