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LM2830XMF Datasheet

  • LM2830XMF

  • National Semiconductor [High Frequency 1.0A Load - Step-Dow...

  • 860.13KB

  • NSC

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LM2830 High Frequency 1.0A Load - Step-Down DC-DC Regulator
August 2006
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鈩?/div>
PMOS switch using state-of-the-art 0.5 碌m 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
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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鈩?PMOS switch
0.6V, 2% Internal Voltage Reference
Internal soft-start
Current mode, PWM operation
Thermal Shutdown
Over voltage protection
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Applications
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Local 5V to Vcore Step-Down Converters
Core Power in HDDs
Set-Top Boxes
USB Powered Devices
DSL Modems
Typical Application Circuit
20197464
20197481
漏 2006 National Semiconductor Corporation
DS201974
www.national.com

LM2830XMF PDF文件相关型号

LM2830ZSD

LM2830XMF 产品属性

  • National Semiconductor (TI)

  • 5.5 V

  • 1600 KHz

  • 0.6 V to 4.5 V

  • 1 A

  • 1

  • + 125 C

  • SMD/SMT

  • SOT-23

  • 3 V

  • - 40 C

  • Reel

  • 1000

  • Step Down

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