Datasheet > LTC1682_15

LTC1682_15

更新时间： 2022-02-26 12:04:56

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	202K
描述
Doubler Charge Pumps with Low Noise Linear Regulator

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LTC1682_15 数据手册

FEATURES

DESCRIPTIO

TheLTC^®1682/LTC1682-3.3/LTC1682-5aredoublercharge

pumps with an internal low noise, low dropout (LDO) linear

regulator. These parts are designed to provide a low noise

boosted supply voltage for powering noise sensitive devices

such as high frequency VCOs in wireless applications.

■

Low Output Noise: 60µV_RMS(100kHz BW)

■

Adjustable or Fixed Boosted Output

Adjustable Output Voltage Range: 2.5V to 5.5V

Fixed Output Voltages: 3.3V, 5V

Wide Input Voltage Range: 1.8V to 4.4V

Uses Small Ceramic Capacitors

■

An internal doubler charge pump converts a 1.8V to 4.4V

input to a boosted output, while the internal LDO regulator

convertstheboostedvoltagetoalownoiseregulatedoutput.

TheadjustableversionallowstheusertosetV_OUTviaexternal

resistorsconnectedtoFB. Theregulatoriscapableofsupply-

ing up to 50mA of output current. Shutdown reduces the

supply current to < 5µA, removes the load from V_INby

disabling the regulator and discharges V_OUTto ground

through a 100Ω switch.

No Inductors Required

Output Current up to 50mA

550kHz Switching Frequency

Low Operating Current: 150µA

Low Shutdown Current: 1µA

Internal Thermal Shutdown and Current Limiting

Available in 8-Pin MSOP and SO Packages

APPLICATIO S

The LTC1682 LDO regulator is stable with only 2µF on the

output. Small ceramic capacitors can be used, reducing PC

board area.

■

VCO Power Supplies in Cellular Phones

■

2-Way Pagers

■

TheLTC1682/LTC1682-3.3/LTC1682-5areshort-circuitand

over temperature protected. The parts are available in 8-pin

MSOP and SO packages.

Wireless PCMCIA Cards

■

Portable Medical Instruments

■

Low Power Data Acquisition

■

Remote Transmitters

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

Open-Loop Close-In Phase Noise

4.2V VCO Power Supply, V_IN= 2.5V to 4.4V

SHUTDOWN

4.2V

4.7µF

OUT

CPO

OUT

902MHz

1000pF

VCO

4.7µF

MURATA

AMPLITUDE

10dB/DIV

SHDN

LTC1682

MQE001-902

100k

36k

1µF

–

2.5V TO

4.4V

0.22µF

4.7µF

15k

1000pF

GND

1682 TA01

CENTER = 902MHz

SPAN = 100kHz

SWP = 10 sec

RES BW = 1kHz

VBW = 30Hz

REF = 0dBm

1682 TA02

12 3 4 5 6 7...12

下载PDF

与LTC1682_15相关器件

型号	品牌	描述	获取价格	数据表
LTC1682-3.3	Linear	Doubler Charge Pumps with Low Noise Linear Regulator	获取价格
LTC1682-3.3_15	Linear	Doubler Charge Pumps with Low Noise Linear Regulator	获取价格
LTC1682-5	Linear	Doubler Charge Pumps with Low Noise Linear Regulator	获取价格
LTC1682-5_15	Linear	Doubler Charge Pumps with Low Noise Linear Regulator	获取价格
LTC1682CMS8	Linear	Doubler Charge Pumps with Low Noise Linear Regulator	获取价格
LTC1682CMS8#PBF	Linear	LTC1682 - Doubler Charge Pumps with Low Noise Linear Regulator; Package: MSOP; Pins: 8; Te	获取价格