Datasheet > NCP1508

NCP1508

更新时间： 2024-09-20 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
15页	405K
描述
Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in DFN Package

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NCP1508 数据手册

NCP1508

Up to 500 mA, 1 MHz, High

Efficiency Synchronous

Step−Down DC−DC

Converter in DFN Package

http://onsemi.com

The NCP1508 step−down PWM DC−DC converter is optimized

for portable applications powered from 1−cell Li−ion or 3 cell

Alkaline/NiCd/NiMH batteries. This DC−DC converter utilizes a

current−mode control architecture for easy compensation and better

line regulation. It also uses synchronous rectification to increase

efficiency and reduce external part count. The NCP1508 optimizes

efficiency in light load conditions when switched from a normal

PWM mode to a “pulsed switching” mode. The device also has a

built−in 1 MHz (nominal) oscillator for the PWM circuitry, or it can

be synchronized to an external 500 kHz to 1000 kHz clock signal.

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

limiting, and thermal shutdown protection. The NCP1508 is

available in a space saving, low profile 3x3 mm 10 pin DFN package.

MARKING

DIAGRAM

10 PIN DFN

MN SUFFIX

CASE 485C

1508

ALYW

1508 = Specific Device Code

= Assembly Location

= Wafer Lot

= Year

= Work Week

Features

• High Efficiency:

93% for 1.89 V Output at 3.6 V Input and 125 mA Load Current

91% for 1.89 V Output at 3.6 V Input and 300 mA Load Current

ORDERING INFORMATION

Device

Package

Shipping†

3000 Tape & Reel

• Digital Programmable Output Voltages: 1.0, 1.3, 1.5 or 1.89 V

• Output Current up to 500 mA at V = 3.6 V

NCP1508MNR2

10 Pin DFN

• Low Quiescent Current of 14 mA in Pulsed Switching Mode

• Low 0.2 mA Shutdown Current

NCP1508MNR2G 10 Pin DFN 3000 Tape & Reel

(Pb−Free)

• −30°C to 85°C Operation Temperature

• Low Profile DFN Package

• Pb−Free Package is Available

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

Application

• Cellular Phones, Smart Phones and PDAs

• Digital Still Cameras

• MP3 Players and Portable Audio Systems

100

• Wireless and DSL Modems

• Portable Equipment

Pulsed Mode

PWM Mode

6.8 mH

VCC

out

2.7 V − 5.2 V

VCCP

out

22 mH

10 mH

SHD

CB1

CB0 and CB1

Control Input

SYNC CB0

= 3.6 V

GNDA GNDP

out

= 1.5 V

0.001

0.01

0.1

100

1000

(mA)

out

Figure 1. Typical Application Circuit

Figure 2. Efficiency vs. Output Current

Semiconductor Components I1dustries, LLC, 2006

Publication Order Number:

July, 2006 − Rev. 1

NCP1508/D

12 3 4 5 6 7...15

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与NCP1508相关器件

型号	品牌	获取价格	描述	数据表
NCP1508MNR2	ONSEMI	获取价格	Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in
NCP1508MNR2G	ONSEMI	获取价格	Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in
NCP1509	ONSEMI	获取价格	Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in
NCP1509MNR2	ONSEMI	获取价格	Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in
NCP1509MNR2G	ONSEMI	获取价格	Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in
NCP151	ONSEMI	获取价格	LDO Regulator - Dual, High PSRR 300mA
NCP1510	ONSEMI	获取价格	PWM Buck Converter with a Very Low Iq During Low Load Conditions
NCP1510/D	ONSEMI	获取价格	PWM Buck Converter with a Very Low Iq During Low Load Conditions
NCP1510A	ONSEMI	获取价格	High Efficiency DC-DC Converters
NCP1510FCT1G	ONSEMI	获取价格	PWM Buck Converter with a Very Low Iq During Low Load Conditions

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