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LM5116MHX Datasheet

  • LM5116MHX

  • Wide Range Synchronous Buck Controller

  • 26頁

  • NSC

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LM5116 Wide Range Synchronous Buck Controller
February 2007
LM5116
Wide Range Synchronous Buck Controller
General Description
The LM5116 is a synchronous buck controller intended for
step-down regulator applications from a high voltage or widely
varying input supply. The control method is based upon cur-
rent mode control utilizing an emulated current ramp. Current
mode control provides inherent line feed-forward, cycle by
cycle current limiting and ease of loop compensation. The use
of an emulated control ramp reduces noise sensitivity of the
pulse-width modulation circuit, allowing reliable control of
very small duty cycles necessary in high input voltage appli-
cations. The operating frequency is programmable from
50kHz to 1MHz. The LM5116 drives external high-side and
low-side NMOS power switches with adaptive dead-time con-
trol. A user-selectable diode emulation mode enables discon-
tinuous mode operation for improved efficiency at light load
conditions. A low quiescent current sleep mode disables the
controller and consumes less than 10碌A of total input current.
Additional features include a high voltage bias regulator, au-
tomatic switch-over to external bias for improved efficiency,
thermal shutdown, frequency synchronization, cycle by cycle
current limit and adjustable line under-voltage lockout. The
device is available in a power enhanced TSSOP-20 package
featuring an exposed die attach pad to aid thermal dissipation.
Features
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Emulated peak current mode
Wide operating range up to 100V
Low I
Q
sleep mode (<10碌A)
Drives standard or logic level MOSFETs
Robust 2A peak gate drive
Free-run or synchronous operation to 1MHz
Optional diode emulation mode
Programmable output from 1.215V to 80V
Precision 1.5% voltage reference
Programmable current limit
Programmable soft-start
Programmable line under-voltage lockout
Automatic switch to external bias supply
TSSOP-20EP exposed pad
Thermal shutdown
Typical Application
30007501
漏 2007 National Semiconductor Corporation
300075
www.national.com

LM5116MHX 產品屬性

  • National Semiconductor (TI)

  • 6 V to 100 V

  • 1.215 V to 80 V

  • 3.5 A

  • 1

  • + 125 C

  • SMD/SMT

  • TSSOP EP

  • - 40 C

  • Reel

  • 2500

LM5116MHX相關型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Seoul Semiconductor [RED LAMP LED]
    SEOUL
  • 英文版
    High Voltage High Side and Low Side Gate Driver
    NSC
  • 英文版
    High Voltage High Side and Low Side Gate Driver
    NSC [Natio...
  • 英文版
    High Voltage High Side and Low Side Gate Driver
    NSC
  • 英文版
    High Voltage High Side and Low Side Gate Driver
    NSC [Natio...
  • 英文版
    High Voltage Half-Bridge Gate Driver with Programmable Delay
    NSC
  • 英文版
    High Voltage Half-Bridge Gate Driver with Programmable Delay
    NSC [Natio...
  • 英文版
    High Voltage Half-Bridge Gate Driver with Adaptive Delay
    NSC
  • 英文版
    High Voltage Half-Bridge Gate Driver with Adaptive Delay
    NSC [Natio...
  • 英文版
    100V Half Bridge Gate Driver with Programmable Dead-time
    NSC
  • 英文版
    100V Half Bridge Gate Driver with Programmable Dead-time
    NSC [Natio...
  • 英文版
    100V Half Bridge Gate Driver with Programmable Dead-Time
    NATIONAL SEMICONDUCTOR
  • 英文版
    100V / 1.4A Peak Half Bridge Gate Driver
    NSC
  • 英文版
    100V / 1.4A Peak Half Bridge Gate Driver
    NSC [Natio...
  • 英文版
    100V / 1A Peak Half Bridge Gate Driver
    NSC
  • 英文版
    100V / 1A Peak Half Bridge Gate Driver
    NSC [Natio...
  • 英文版
    National Semiconductor
  • 英文版
    Dual 5A Compound Gate Driver with Negative Output Voltage Ca...
    NSC
  • 英文版
    Dual 5A Compound Gate Driver with Negative Output Voltage Ca...
    NSC [Natio...
  • 英文版
    Dual 5A Compound Gate Driver
    NSC

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