LM3152 Datasheet | Texas Instruments

LM3151, LM3152, LM3153 .ti. SNVS562G - SEPTEMBER 2008 - REVISED MARCH 2011 LM3151/LM3152/LM3153 SIMPLE SWITCHER® CONTROLLER, High Input Voltage Synchronous Step-Down Check for Samples: LM3151, LM3152, LM3153 Features - 234 Power Wise™ Step-down Controller - 6V to 42V Wide Input Voltage Range - Fixed Output Voltage of 3.3V - Fixed Switching Frequencies of 250 k Hz/500 k Hz/750 k Hz - No Loop pensation Required - Fully WEBENCH® Enabled - Low External ponent 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 - Tele - Networking Equipment - Routers - Security Surveillance - Power Modules 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 k Hz, 500 k Hz, and 750 k Hz. 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 pensation, which reduces external ponent count and reduces design...