Datasheet > LM2772

LM2772

更新时间： 2024-11-14 02:58:35

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LM2772 Low-Ripple Switched Capacitor Step-Down Regulator

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LM2772 数据手册

LM2772

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SNVS486B –DECEMBER 2006–REVISED MAY 2013

LM2772 Low-Ripple Switched Capacitor Step-Down Regulator

Check for Samples: LM2772

FEATURES

DESCRIPTION

The LM2772 is a switched capacitor step-down

regulator that produces a 1.2V output. It is capable of

supplying loads up to 150mA with 3% output voltage

regulation over line, load, and temperature. The

LM2772 operates with an input voltage from 3.0V to

5.5V, accommodating 1-cell Li-Ion batteries and

chargers.

•

Low-Noise Fixed Frequency Operation

1.2V Output Voltage

3% Output Voltage Regulation

Li-Ion (3.6V) to 1.2V with 80% Efficiency

Very Low Output Ripple: 8mV @ 150mA

Output Currents up to 150mA

The LM2772 utilizes a highly efficient regulated multi-

gain charge pump. Pre-regulated 1.1MHz fixed-

frequency switching results in very low ripple and

noise on both the input and the output. When output

currents are low, the part automatically switches to a

low-ripple PFM regulation mode to maintain high

efficiency over the entire load range.

2.7V to 5.5V Input Voltage Range

Shutdown Disconnects Load from V_IN

1.1MHz Switching Frequency

No Inductors…Small Solution Size

Short Circuit and Thermal Protection

WSON-10 Package (3mm × 3mm × 0.8mm)

The LM2772 is available in TI’s WSON-10 Package

(WSON-10).

APPLICATIONS

•

DSP, Memory, and Microprocessor Power

Supplies

•

Mobile Phones and Pagers

Portable Electronic Devices

Typical Application Circuit

: 1.2V

OUT

= 3.0V to 5.5V

up to 150 mA

OUT

1 µF

4.7 µF

C1+

GND

1 µF

LM2772

High: ON

Low: Shutdown

C1-

C2+

C3+

1 µF

C3-

C2-

Capacitors: 1 µF - TDK C1005X5R0J105K

4.7 µF - TDK C1608X5R0J475K

or equivalent

Figure 1.

Figure 2. LM2772 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...17

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与LM2772相关器件

型号	品牌	获取价格	描述	数据表
LM2772_15	TI	获取价格	LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
LM2772SD	NSC	获取价格	Low-Ripple Switched Capacitor Step-Down Regulator
LM2772SD/NOPB	NSC	获取价格	IC SWITCHED CAPACITOR REGULATOR, 1500 kHz SWITCHING FREQ-MAX, DSO10, 3 X 3 MM, 0.80 MM HEI
LM2772SD/NOPB	TI	获取价格	LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
LM2772SDX	NSC	获取价格	Low-Ripple Switched Capacitor Step-Down Regulator
LM2772SDX/NOPB	TI	获取价格	LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
LM2773	NSC	获取价格	Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
LM2773	TI	获取价格	LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator
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

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