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参数资料
| 型号： | LM2830ZQMF |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 3750 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | SOT-23, 5 PIN |
| 文件页数： | 1/24页 |
| 文件大小： | 508K |
| 代理商： | LM2830ZQMF |
LM2830
December 17, 2010
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 ac-
curate 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 m BiCMOS technology re-
sults in the best power density available. The world-class
control circuitry allows on-times as low as 30ns, thus sup-
porting exceptionally high frequency conversion over the en-
tire 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
■ LM2830ZQ and LM2830XQ in the SOT23-5 package are
Automotive Grade products that are AEC-Q100 grade 1
qualified (-40°C to +125°C operating junction
temperature)
■ Space Saving SOT23-5 Package
■ Input voltage range of 3.0V to 5.5V
■ Output voltage range of 0.6V to 4.5V
■ 1.0A output current
■ High Switching Frequencies
1.6MHz (LM2830X)
3.0MHz (LM2830Z)
■ 130m PMOS switch
■ 0.6V, 2% Internal Voltage Reference
■ Internal soft-start
■ Current mode, PWM operation
■ Thermal Shutdown
■ Over voltage protection
Applications
■ Local 5V to Vcore Step-Down Converters
■ Core Power in HDDs
■ Set-Top Boxes
■ USB Powered Devices
■ DSL Modems
■ Automotive
Typical Application Circuit
20197464
2010 National Semiconductor Corporation
201974
www.national.com
LM2830
High
Frequency
1.0A
Load
-
Step-Down
DC-DC
Regulator
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2830ZQMF/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2830ZQMFE/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2830ZQMFX/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2830ZSD | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM2830ZSD/NOPB | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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