Texas Instruments LM5008AMM/NOPB

Description
The LM5008A is a functional variant of the LM5008COT Buck Switching Regulator. The functional differences of the LM5008A are: the minimum input operating voltage is 6 V, the on-time equation is slightly different, and the requirement for a minimum load current is removed.
The LM5008A Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100 V N-Channel Buck Switch. The device is easy to implement and is provided in the VSSOP-8 and the thermally enhanced WSON-8 packages. The regulator is based on a control scheme using an ON time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, Vcc under-voltage lockout, Gate drive under-voltage lockout, Max Duty Cycle limiter, and a pre-charge switch.

Features
100-V 350-mA Constant On-Time Buck Switching Regulator
Operating input voltage range: 6V to 95V
Integrated 100V N-Channel buck switch
Internal start-up regulator. No loop compensation required
Ultra-fast transient response
On time varies inversely with input voltage
Operating frequency remains constant with varying line voltage and load current
Adjustable output voltage from 2.5V
Highly efficient operation
Precision internal reference
Low bias current
Intelligent current limit
Thermal shutdown
VSSOP-8 and WSON-8 (4mm x 4mm) packages

Applications
Non-Isolated Telecommunication Buck Regulator
Secondary High Voltage Post Regulator
42V Automotive Systems