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參數資料
| 型號： | LM2830ZMFX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | High Frequency 1.0A Load - Step-Down DC-DC Regulator |
| 中文描述： | 1.75 A SWITCHING REGULATOR, 3750 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數： | 1/24頁 |
| 文件大小： | 862K |
| 代理商： | LM2830ZMFX |
LM2830
High Frequency 1.0A Load - Step-Down DC-DC
Regulator
General Description
The LM2830 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 LM2830 is easy to
use. The ability to drive 1.0A 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 1.6 MHz, or 3.0 MHz, allowing the use of extremely small
surface mount inductors and chip capacitors. Even though
the operating frequency is high, efficiencies up to 93% are
easy to achieve. External shutdown is included, featuring an
ultra-low stand-by current of 30 nA. The LM2830 utilizes
current-mode control and internal compensation to provide
high-performance regulation over a wide range of operating
conditions. Additional features include internal soft-start cir-
cuitry 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
1.0A output current
n
High Switching Frequencies
1.6MHz (LM2830X)
3.0MHz (LM2830Z)
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
20197464
20197481
August 2006
L
2006 National Semiconductor Corporation
DS201974
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2830ZMFX/NOPB | 功能描述:直流/直流開關調節器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM2830ZQMF/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2830ZQMFE/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2830ZQMFX/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2830ZSD | 功能描述:直流/直流開關調節器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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