LD7129 - Leadtrend

LD7129 Single Synchronous Buck PWM and Linear Power Controller

The LD7129 consists of the dual-output power controller and the protection circuits in a single SOP-14 packaged chip for the graphic card and other applications. The dual-output power controller provides the regulation on a synchronous rectified buck converter by driving 2 N-MOSFETs and one N-MOSFET in a linear configuration. The synchronous rectified buck c.

Features

• Controller Operates from 5V and 12V
• Drive Two N-channel MOSFETs for Switching Buck Converter
• Drive a N-channel MOSFET on Linear Output
• Fixed 600KHz Constant Switching Frequency
• Full Range 0~100% Duty-cycle
• Internal Soft-start
• Fast Transient Response
• UVP Monitoring on Both Outputs
• Internal 0.8V Reference Voltage. Applications
• Graphics-GPU and Memory Supplies
• ASIC Power Supplies
• Embedded Processor and I/O Supplies
• Cable Modem, Set Top Box, and DSL Modems
• DSP and Core Communications Processor Supplies Typical Application Vin (3.3V or 5V) Q3 Vout 5V 12V 5VCC 12VCC .