參數(shù)資料
型號(hào)： NCP1521B
廠商： ON SEMICONDUCTOR
元件分類： DC/DC變換器
英文描述： 1.5 MHz, 600 mA Step-Down DC-DC Converter(1.5MHz, 600mA降壓DC-DC轉(zhuǎn)換器)
中文描述： 1.5兆赫，600毫安降壓型DC - DC轉(zhuǎn)換器頻率（1.5MHz，600mA的降壓型DC - DC轉(zhuǎn)換器）
文件頁(yè)數(shù)： 1/14頁(yè)
文件大小： 182K
代理商： NCP1521B
Semiconductor Components Industries, LLC, 2007
June, 2007 - Rev. 3
1
Publication Order Number:
NCP1521B/D
NCP1521B
1.5 MHz, 600 mA Step-Down
DC-DC Converter
High-Efficiency, Low Ripple, Adjustable
Output Voltage
The NCP1521B step-down DC-DC converter is a monolithic
integrated circuit optimized for portable applications powered from one
cell Li-Ion or three cell Alkaline/NiCd/NiMH batteries. The part,
available in adjustable output voltage versions ranging from 0.9 V to
3.9 V, is able to deliver up to 600 mA. 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 smaller inductors and capacitors. Automatic switching
PWM/PFM mode offers improved system efficiency.
Additional features include integrated soft-start, cycle-by-cycle
current limiting and thermal shutdown protection. The NCP1521B is
available in a space saving, low profile TSOP5 and UDFN6 packages.
Features
Up to 96% Efficiency
Best-In-Class Ripple, including PFM Mode
Sources up to 600 mA
1.5 MHz Switching Frequency
Adjustable Output Voltage from 0.9 V to 3.9 V
Synchronous Rectification for Higher Efficiency
2.7 V to 5.5 V Input Voltage Range
Low Quiescent Current
Shutdown Current Consumption of 0.3
Thermal Limit Protection
Short Circuit Protection
All Pins are Fully ESD Protected
This is a Pb-Free Device
Typical Applications
Cellular Phones, Smart Phones and PDAs
Digital Still/Video Cameras
MP3 Players and Portable Audio Systems
Wireless and DSL Modems
Portable Equipment
USB Powered Devices
A
GND
2
VIN
1
EN
3
LX
5
FB
4
OFF ON
VIN
CIN
COUT
R1
R2
Cff
Figure 1. Typical Application - TSOP-5
L
VOUT
GND
2
EN
1
VIN
3
FB
6
GND
4
OFF ON
R1
R2
VOUT
5
LX
VIN
Figure 2. Typical Application - UDFN6
TSOP-5
SN SUFFIX
CASE 483
http://onsemi.com
MARKING
DIAGRAM
1
5
Device
Package
Shipping
ORDERING INFORMATION
NCP1521BSNT1G
TSOP-5
(Pb-Free)
3000/Tape & Reel
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.
GAL
A
Y
W
= Specific Device Code
= Assembly Location
= Year
= Work Week
= Pb-Free Package
(Note: Microdot may be in either location)
1
5
GALAYW
ZCM
1
2
3
6
5
4
UDFN6
MU SUFFIX
CASE 517AB
ZC
M
= Specific Device Code
= Date Code
= Pb-Free Package
(Note: Microdot may be in either location)
NCP1521BMUTBG
UDFN6
(Pb-Free)
3000/Tape & Reel
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NCP1521BMUTBG 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 STEP DWN DCDC CNVRTR 1.5MHz 600mA RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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