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| 型号： | NCP1578MNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 1/22页 |
| 文件大小： | 1861K |
| 描述： | IC REG DL BCK/LINEAR SYNC 20-QFN |
| 产品变化通告： | Product Obsolescence 19/Dec/2008 |
| 标准包装： | 4,000 |
| 拓扑： | 降压（降压）同步（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 300kHz |
| 电压/电流 - 输出 1： | 控制器 |
| 电压/电流 - 输出 2： | 5V，50mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 是 |
| 电源电压： | 4.5 V ~ 24 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（4x4） |
| 包装： | 带卷 (TR) |
?Semiconductor Components Industries, LLC, 2007
December, 2007 - Rev. 0
1
Publication Order Number:
NCP1578/D
NCP1578
Synchronous Step-Down
Controller with 50 mA
Linear Regulator
The NCP1578 is a voltage mode synchronous step-down controller
for high performance systems intended to be used in battery-powered
systems. The NCP1578 includes a high efficiency PWM controller
with adjustable output, and a 5 V/50 mA linear regulator. A pin is
provided to enable or disable forced PWM mode of operation. An
internal power good voltage monitor tracks the SMPS output.
NCP1578 also features soft-start sequence, UVLO for linear regulator
and switcher, overvoltage protection, overcurrent protection, and
thermal shutdown. The IC is packaged in QFN20.
Features
"Fixed 5.0 V/50 mA Internal Linear Regulator
"Adjustable PWM Output Voltage
"1.5% Accuracy 0.8 V Reference
"4.5 V to 24 V Battery/Adaptor Voltage Range
"Selectable Force PWM Mode
"Lossless, Programmable High Side MOSFET's R
DS(ON)
Current
Sensing
"Soft-start and Power-Up Sequencing
"Overvoltage Protection, Undervoltage Protection
"Programmable Delay Power Good Output
"Thermal Shutdown
"Housed in QFN20
"This is a Pb-Free Device
Typical Applications
"Network HUB, Switchers and Routers
"3-Cell and 4-Cell Li-ion Battery-Powered Devices
"Personal Computer Peripherals
"Microprocessors Power Supply
"Embedded Controller
"DSP and Core Processor
"Supply for LCD Display
QFN20
MN SUFFIX
CASE 485E
MARKING DIAGRAM
PIN CONNECTIONS
http://onsemi.com
N1578 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb-Free Package
(Note: Microdot may be in either location)
Device Package Shipping
ORDERING INFORMATION
NCP1578MNR2G QFN20
(Pb-Free)
4000/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.
PGND
PGDLY
PGOOD
SS
COMP
FPWM
EN_LDO
OCSET
FOFF
EN_SW
N1578
ALYWG
G
1
20
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