LM2653

更新时间： 2024-11-03 11:06:39

品牌	Logo	应用领域
德州仪器 - TI		开关控制器开关式稳压器开关式控制器电源电路开关式稳压器或控制器
页数	文件大小	规格书
20页	1055K
描述
1.5A 高效同步开关稳压器

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LM2653 数据手册

LM2653

www.ti.com

SNVS050E –NOVEMBER 1999–REVISED APRIL 2013

LM2653 1.5A High Efficiency Synchronous Switching Regulator

Check for Samples: LM2653

FEATURES

DESCRIPTION

The LM2653 switching regulator provides high

efficient power conversion over a 100:1 load range

(1.5A to 15 mA). This feature makes the LM2653 an

ideal fit in battery-powered applications.

•

Efficiency up to 97%

4V to 14V Input Voltage Range

1.5V to 5.0V Adjustable Output Voltage

0.1Ω Switch On Resistance

Synchronous rectification is used to achieve up to

97% efficiency. At light loads, the LM2653 enters a

low power hysteretic or “sleep” mode to keep the

efficiency high. In many applications, the efficiency

still exceeds 80% at 15 mA load. A shutdown pin is

available to disable the LM2653 and reduce the

supply current to 7µA.

300 kHz Fixed Frequency Internal Oscillator

7 μA Shutdown Current

Patented Current Sensing for Current Mode

Control

•

Input Undervoltage Lockout

Output Overvoltage Shutdown Protection

Output Undervoltage Shutdown Protection

Adjustable Soft-Start

All the power, control, and drive functions are

integrated within the ICs. The ICs contain patented

current sensing circuity for current mode control. This

feature eliminates the external current sensing

resistor required by other current-mode DC-DC

converters.

Adjustable PGOOD Delay

Current Limit and Thermal Shutdown

The ICs have a 300 kHz fixed frequency internal

oscillator. The high oscillator frequency allows the

use of extremely small, low profile components.

APPLICATIONS

•

Webpad

Personal Digital Assistants (PDAs)

Computer Peripherals

Protection features include thermal shutdown, input

undervoltage lockout, adjustable soft-start, cycle by

cycle current limit, output overvoltage and

undervoltage protections.

Battery-Powered Devices

Notebook Computer Video Supply

Handheld Scanners

GXM I/O and Core Voltage

High Efficiency 5V Conversion

Typical Application

Efficiency vs Load Current

(V_IN= 5V, V_OUT= 3.3V)

Figure 1.

Figure 2.

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...20

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LM2653 替代型号

型号	品牌	替代类型	描述	数据表
LM2651	TI	功能相似	1.5A 高效开关稳压器
LM2655	TI	功能相似	2.5A High Efficiency Synchronous Switching Regulator
LM26001-Q1	TI	功能相似	LM26001/-Q1 1.5-A Switching Regulator With High-Efficiency Sleep Mode

与LM2653相关器件

型号	品牌	获取价格	描述	数据表
LM2653_05	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2653MTC-ADJ	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2653MTC-ADJ	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2653MTC-ADJ/NOPB	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2653MTCX-ADJ	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2653MTCX-ADJ/NOPB	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2655	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655_05	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655_15	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator

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