LM3153 SIMPLE SWITCHER® CONTROLLER, 42V Synchronous Step-Down | TI.com

LM3153
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SIMPLE SWITCHER® CONTROLLER, 42V Synchronous Step-Down

 

Description

The LM3151/2/3 SIMPLE SWITCHER ® Controller is an easy to use and simplified step down power controller capable of providing up to 12A of output current in a typical application. Operating with an input voltage range from 6V-42V, the LM3151/2/3 features a fixed output voltage of 3.3V, and features switching frequencies of 250 kHz, 500 kHz, and 750 kHz. The synchronous architecture provides for highly efficient designs. The LM3151/2/3 controller employs a Constant On-Time (COT) architecture with a proprietary Emulated Ripple Mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage ripple. The Constant On-Time (COT) regulation architecture allows for fast transient response and requires no loop compensation, which reduces external component count and reduces design complexity.

Fault protection features such as thermal shutdown, under-voltage lockout, over-voltage protection, short-circuit protection, current limit, and output voltage pre-bias startup allow for a reliable and robust solution.

The LM3151/2/3 SIMPLE SWITCHER ® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH ® online design tool. WEBENCH ® provides design support for every step of the design process and includes features such as external component calculation with a new MOSFET selector, electrical simulation, thermal simulation, and Build-It boards for prototyping.


Features

  • PowerWise ® step-down controller
  • 6V to 42V Wide input voltage range
  • Fixed output voltage of 3.3V
  • Fixed switching frequencies of 250 kHz/500 kHz/750 kHz
  • No loop compensation required
  • Fully WEBENCH ® enabled
  • Low external component count
  • Constant On-Time control
  • Ultra-Fast transient response
  • Stable with low ESR capacitors
  • Output voltage pre-bias startup
  • Valley current limit
  • Programmable soft-start

  • Typical Applications

  • Telecom
  • Networking Equipment
  • Routers
  • Security Surveillance
  • Power Modules

  • New!
    WEBENCH® Power Designer is now even easier to use. Try it now.

    WEBENCH® Designer LM3153

      Min   Max Range
    Vin  V 6.0 to 18.0V
    Vout  V 3.3 to 3.3V
    Iout  A ≤ 12A
    Ambient Temp  °C -40 to 125°C

    Parametrics

    Compare all products in Buck controllers (external switch) Email Download to Excel
    Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
    LM3153 Order now 6     42     3.3     3.3     12     1     1     750     750     3.6     Enable
    Synchronous Rectification
    Tracking    
    72     -40 to 125     Catalog     HTSSOP | 14     Controller     COT with emulated ripple    
    LM3150 Order now 6     42     0.6     40     12     1     1     200     1000     3.5     Adjustable Current Limit
    Enable
    Frequency Synchronization
    Pre-Bias Start-Up
    Synchronous Rectification
    UVLO Adjustable    
    96     -40 to 125     Catalog     HTSSOP | 14     Controller     COT with emulated ripple    
    LM3151 Order now 6     42     3.3     3.3     12     1     1     250     250     3.6     Enable
    Synchronous Rectification
    Tracking    
    90     -40 to 125     Catalog     HTSSOP | 14     Controller     COT with emulated ripple    
    LM3152 Samples not available 6     33     3.3     3.3     12     1     1     500     500     3.6     Enable
    Synchronous Rectification
    Tracking    
    81     -40 to 125     Catalog     HTSSOP | 14     Controller     COT with emulated ripple