Datasheet > LM2651

LM2651

更新时间： 2024-11-03 11:11:43

品牌	Logo	应用领域
德州仪器 - TI		开关稳压器
页数	文件大小	规格书
26页	573K
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1.5A 高效开关稳压器

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LM2651

SNVS032E –FEBRUARY 2000–REVISED JANUARY 2016

LM2651 1.5 A High-Efficiency Synchronous Switching Regulator

1 Features

3 Description

The LM2651 switching regulator provides high-

efficiency power conversion over a 100:1 load range

(1.5 A to 15 mA). This feature makes the LM2651 an

ideal fit in battery-powered applications that demand

long battery life in both run and standby modes.

•

Ultrahigh Efficiency up to 97%

High-Efficiency Over a 1.5-A to 1.5-mA Load

Range

•

4-V to 14-V Input Voltage Range

1.8-V, 2.5-V, 3.3-V, or ADJ Output Voltage

Synchronous rectification is used to achieve up to

97% efficiency. At light loads, the LM2651 enters a

low power hysteretic or sleep mode to maintain high

efficiency. In many applications, the efficiency still

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

available to disable the LM2651 and reduce the

supply current to less than 10 µA.

Internal MOSFET Switch With Low R_DS(on)of

75 mΩ

•

300-kHz Fixed Frequency Internal Oscillator

7-µA Shutdown Current

Patented Current Sensing for Current Mode

Control

The LM2651 contains a patented current sensing

circuitry for current mode control. This feature

eliminates the external current sensing resistor

required by other current-mode DC-DC converters.

•

Input Undervoltage Lockout

Adjustable Soft-Start

Current Limit and Thermal Shutdown

16-Pin TSSOP Package

The LM2651 has a 300-kHz fixed frequency internal

oscillator. The high oscillator frequency allows the

use of extremely small, low-profile components.

2 Applications

programmable soft-start feature limits current

•

Personal Digital Assistants (PDAs)

Computer Peripherals

surges from the input power supply at start-up and

provides a simple means of sequencing multiple

power supplies.

Battery-Powered Devices

Handheld Scanners

Other protection features include input undervoltage

lockout, current limiting, and thermal shutdown.

High-Efficiency 5-V Conversion

Device Information⁽¹⁾

PART NUMBER

LM2651

PACKAGE

BODY SIZE (NOM)

TSSOP (16)

5.00 mm × 4.40 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...26

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LM2651 替代型号

型号	品牌	替代类型	描述	数据表
LM2653	TI	功能相似	1.5A 高效同步开关稳压器
LM2734-Q1	TI	功能相似	具有轻负载效率的 3V 至 20V 输入电压、1A、汽车类降压转换器

与LM2651相关器件

型号	品牌	获取价格	描述	数据表
LM2651_05	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2651MTC-1.8	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2651MTC-1.8/NOPB	TI	获取价格	2.6A SWITCHING REGULATOR, 345kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16
LM2651MTC-2.5	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2651MTC-3.3	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2651MTC-3.3	TI	获取价格	1.5A High Efficiency Switching Regulator 16-TSSOP -40 to 125
LM2651MTC-3.3/NOPB	TI	获取价格	1.5A 高效开关稳压器 \| PW \| 16 \| -40 to 125
LM2651MTC-ADJ	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2651MTC-ADJ	TI	获取价格	1.5A 高效开关稳压器 \| PW \| 16 \| -40 to 125
LM2651MTC-ADJ/NOPB	NSC	获取价格	IC 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regu

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