參數(shù)資料
型號： LM2831YSD
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： High Frequency 1.5A Load - Step-Down DC-DC Regulator
中文描述： 2.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, DSO6
封裝： LLP-6
文件頁數(shù)： 1/27頁
文件大?。?/td> 893K
代理商： LM2831YSD
LM2831
High Frequency 1.5A Load - Step-Down DC-DC
Regulator
General Description
The LM2831 regulator is a monolithic, high frequency, PWM
step-down DC/DC converter in a 5 pin SOT23 and a 6 Pin
LLP package. It provides all the active functions to provide
local DC/DC conversion with fast transient response and
accurate regulation in the smallest possible PCB area. With
a minimum of external components, the LM2831 is easy to
use. The ability to drive 1.5A loads with an internal 130 m
PMOS switch using state-of-the-art 0.5 μm BiCMOS technol-
ogy results in the best power density available. The world-
class control circuitry allows on-times as low as 30ns, thus
supporting exceptionally high frequency conversion over the
entire 3V to 5.5V input operating range down to the minimum
output voltage of 0.6V. Switching frequency is internally set
to 550 kHz, 1.6 MHz, or 3.0 MHz, allowing the use of
extremely small surface mount inductors and chip capaci-
tors. Even though the operating frequency is high, efficien-
cies up to 93% are easy to achieve. External shutdown is
included, featuring an ultra-low stand-by current of 30 nA.
The LM2831 utilizes current-mode control and internal com-
pensation to provide high-performance regulation over a
wide range of operating conditions. Additional features in-
clude internal soft-start circuitry to reduce inrush current,
pulse-by-pulse current limit, thermal shutdown, and output
over-voltage protection.
Features
n
Space Saving SOT23-5 Package
n
Input voltage range of 3.0V to 5.5V
n
Output voltage range of 0.6V to 4.5V
n
1.5A output current
n
High Switching Frequencies
1.6MHz (LM2831X)
0.55MHz (LM2831Y)
3.0MHz (LM2831Z)
n
130m
PMOS switch
n
0.6V, 2% Internal Voltage Reference
n
Internal soft-start
n
Current mode, PWM operation
n
Thermal Shutdown
n
Over voltage protection
Applications
n
Local 5V to Vcore Step-Down Converters
n
Core Power in HDDs
n
Set-Top Boxes
n
USB Powered Devices
n
DSL Modems
Typical Application Circuit
20174864
20174881
August 2006
L
2006 National Semiconductor Corporation
DS201748
www.national.com
相關(guān)PDF資料
PDF描述
LM2831YSDX High Frequency 1.5A Load - Step-Down DC-DC Regulator
LM2831ZMF High Frequency 1.5A Load - Step-Down DC-DC Regulator
LM2831ZMFX High Frequency 1.5A Load - Step-Down DC-DC Regulator
LM2831ZSD High Frequency 1.5A Load - Step-Down DC-DC Regulator
LM2831ZSDX High Frequency 1.5A Load - Step-Down DC-DC Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2831YSD/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2831YSDX 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2831YSDX/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2831ZMF 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2831ZMF EVAL 功能描述:電源管理IC開發(fā)工具 LM2831 Eval Brd RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*