LM34919
www.ti.com SNOSAY2E – MAY 2007 – REVISED FEBRUARY 2013 Ultra-Small 40-V 600-mA Constant On-Time Buck Switching Regulator
Check for Samples: LM34919 FEATURES 1 2 Integrated N-Channel buck switch
Integrated start-up regulator
Input Voltage Range: 8V to 40V
No loop compensation required
Ultra-Fast transient response
Operating frequency remains constant with
load current and input voltage
Maximum switching frequency: 2.0 MHz
Maximum Duty Cycle Limited During Start-Up
Adjustable output voltage
Valley Current Limit At 0.64A Precision internal reference
Low bias current
Highly efficient operation
Thermal shutdown
10-Pin DSBGA Package APPLICATIONS High Efficiency Point-Of-Load (POL) Regulator
Non-Isolated Telecommunication Buck
Regulator
Secondary High Voltage Post Regulator DESCRIPTION
The LM34919 Step Down Switching Regulator features all of the functions needed to implement a low cost,
efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel
Buck Switch, and is available in a 10-pin DSBGA package. The constant on-time feedback regulation scheme …
