LTC3801ES6#TRM

更新时间： 2024-09-16 13:09:51

品牌	Logo	应用领域
凌特 - Linear		开关光电二极管控制器
页数	文件大小	规格书
12页	241K
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LTC3801ES6#TRM 数据手册

LTC3801/LTC3801B

Micropower

Constant Frequency Step-Down

DC/DC Controllers in ThinSOT

FEATURES

DESCRIPTIO

The LTC^®3801/LTC3801B are constant frequency cur-

rent mode step-down DC/DC controllers in a low profile

■

High Efficiency: Up to 94%

■

Very Low No-Load Quiescent Current:

(1mm max) 6-lead SOT-23 (ThinSOT^TM

) package. The

Only 16µA (LTC3801)

■

High Output Currents Easily Achieved

parts provide excellent AC and DC load and line regula-

tion with ±1.5% output voltage accuracy. The LTC3801

consumes only 195µA of quiescent current in normal

operation, dropping to 16µA under no-load conditions.

■

Internal Soft-Start

■

Wide V_INRange: 2.4V to 9.8V

■

Low Dropout: 100% Duty Cycle

■

Constant Frequency 550kHz Operation

TheLTC3801/LTC3801Bincorporateanundervoltagelock-

out feature that shuts down the device when the input

voltage falls below 2.2V. The LTC3801 automatically

switches into Burst Mode operation at light loads which

enhancesefficiencyatlowoutputcurrent.IntheLTC3801B,

BurstModeoperationisdisabledforloweroutputrippleat

light loads.

Burst Mode^®Operation for High Efficiency

■

at Light Loads (LTC3801)

■

Burst Mode Operation Disabled for Lower Output

Ripple at Light Loads (LTC3801B)

■

Output Voltage as Low as 0.8V

■

±1.5% Voltage Reference Accuracy

■

Current Mode Operation for Excellent Line and Load

To further maximize the life of a battery source, the

external P-channel MOSFET is turned on continuously in

dropout (100% duty cycle). High switching frequency of

550kHz allows the use of a small inductor.

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

Burst Mode is a registered trademark of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

Transient Response

■

Only 6µA Supply Current in Shutdown (LTC3801)

Low Profile (1mm) SOT-23 Package

APPLICATIO S

■

1- or 2-Cell Li-Ion Battery-Powered Applications

■

Wireless Devices

■

Portable Computers

Distributed Power Systems

■

LTC3801 Efficiency vs Load Current*

TYPICAL APPLICATIO

100

= 2.5V

OUT

= 3.3V

= 4.2V

550kHz Micropower Step-Down DC/DC Controller

220pF

= 6.6V

10k

2.7V TO 9.8V

/RUN

LTC3801/

–

10µF

0.025Ω

= 8.4V

= 9.8V

LTC3801B

GND

SENSE

PGATE

402k

4.7µH

OUT

866k

2.5V

0.1

100

1000 10000

47µF

LOAD CURRENT (mA)

3801 TA02

3801 TA01

*SEE NO-LOAD I_Qvs INPUT VOLTAGE ON THE LAST PAGE OF THIS DATA SHEET

3801f

12 3 4 5 6 7...12

中文翻译

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与LTC3801ES6#TRM相关器件

型号	品牌	获取价格	描述	数据表
LTC3801ES6#TRPBF	Linear	获取价格	LTC3801 - Micropower Constant Frequency Step-Down DC/DC Controllers in ThinSOT; Package: S
LTC3802	Linear	获取价格	Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking
LTC3802	ADI	获取价格	具可编程上电 / 断电跟踪功能的双通道 550kHz 同步两相 DC/DC 控制器
LTC3802EGN	Linear	获取价格	Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking
LTC3802EGN#TRPBF	Linear	获取价格	LTC3802 - Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Track
LTC3802EUH	Linear	获取价格	Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking
LTC3803	Linear	获取价格	Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT
LTC3803	ADI	获取价格	采用 ThinSOT 封装的恒定频率、电流模式、反激式 DC/DC 控制器
LTC3803-3	Linear	获取价格	Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT
LTC3803-3	ADI	获取价格	采用 ThinSOT 封装的恒定频率、电流模式、反激式 DC/DC 控制器

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