Datasheet > NCP1521

NCP1521

更新时间： 2024-11-08 04:37:55

品牌	Logo	应用领域
安森美 - ONSEMI		转换器
页数	文件大小	规格书
17页	156K
描述
1.5 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage Step−Down Converter

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NCP1521 数据手册

NCP1521

1.5 MHz, 600 mA,

High−Efficiency, Low

Quiescent Current,

Adjustable Output Voltage

Step−Down Converter

http://onsemi.com

The NCP1521 step−down PWM DC−DC converter is optimized for

portable applications powered from one cell Li−ion or three cell

Alkaline/NiCd/NiMH batteries. The device is available in an adjustable

output voltage from 0.9 V to 3.3 V. It uses synchronous rectification to

increase efficiency and reduce external part count. The device also has a

built−in 1.5 MHz (nominal) oscillator which reduces component size by

allowing a small inductor and capacitors. Automatic switching

PWM/PFM mode offers improved system efficiency.

MARKING

DIAGRAM

TSOP−5

SN SUFFIX

CASE 483

DBPAYWG

Finally, it includes an integrated soft−start, cycle−by−cycle current

limiting, and thermal shutdown protection. The NCP1521 is

available in space saving, low profile TSOP5 and UDFN6 packages.

DBP

= Specific Device Code

= Assembly Location

= Year

Features

= Work Week

= Pb−Free Package

(Note: Microdot may be in either location)

• 95.3% of Efficiency for 3.3 V Output and 4.2 V Input and 80 mA

Load−Current

• Sources up to 600 mA

UDFN6

MU SUFFIX

CASE 517AB

• 1.5 MHz Switching Frequency

• Adjustable Output Voltage from 0.9 V to 3.3 V

• 30 mA Quiescent Current

ZCMG

= Specific Device Code

= Date Code

= Pb−Free Package

• Synchronous Rectification for Higher Efficiency

• 2.7 V to 5.5 V Input Voltage Range

• Thermal Limit Protection

(Note: Microdot may be in either location)

• Shutdown Current Consumption of 0.3 mA

• Short Circuit Protection

ORDERING INFORMATION

• This is a Pb−Free Device

Device

Package

Shipping

Typical Applications

NCP1521ASNT1G

TSOP−5 3000/Tape & Reel

(Pb−Free)

• Cellular Phones, Smart Phones and PDAs

• Digital Still/Video Cameras

• MP3 Players and Portable Audio Systems

• Wireless and DSL Modems

• Portable Equipment

NCP1521AMUTBG

UDFN6 3000/Tape & Reel

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

• USB Powered Devices

VOUT

VIN

CIN

VIN

OFF ON

GND LX

VIN

18 pF

VOUT

COUT

2.2 mH

GND

Cff

OFF ON

10 mF

GND

4.7 mF

VIN

Figure 1. Typical Application − TSOP−5

Figure 2. Typical Application − UDFN6

Semiconductor Components Industries, LLC, 2006

Publication Order Number:

NCP1521/D

July, 2006 − Rev. 4

12 3 4 5 6 7...17

中文翻译

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与NCP1521相关器件

型号	品牌	获取价格	描述	数据表
NCP1521AMUTBG	ONSEMI	获取价格	1.5 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage S
NCP1521ASNT1G	ONSEMI	获取价格	1.5 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage S
NCP1521B	ONSEMI	获取价格	1.5 MHz, 600 mA Step−Down DC−DC Converter
NCP1521B_10	ONSEMI	获取价格	1.5 MHz, 600 mA Step-Down DC-DC Converter
NCP1521BMUTAG	ONSEMI	获取价格	SWITCHING REGULATOR
NCP1521BMUTBG	ONSEMI	获取价格	1.5 MHz, 600 mA Step−Down DC−DC Converter
NCP1521BSNT1G	ONSEMI	获取价格	1.5 MHz, 600 mA Step−Down DC−DC Converter
NCP1522	ONSEMI	获取价格	3.0 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage S
NCP1522ASNT1G	ONSEMI	获取价格	3.0 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage S
NCP1522B	ONSEMI	获取价格	3 MHz, 600 mA Step-Down DC-DC Converter

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