Part Number : LM5017SD
Function : 100 V, 600 mA Constant On-Time Synchronous Buck Regulator
Package : WSON-8 and SO PowerPAD-8 plastic Type
Maker : Texas Instruments
Pinouts : 
Description :
The LM5017SD is a 100 V, 600 mA synchronous step-down regulator with integrated high side and low side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5017 requires no loop compensation, provides excellent transient response, and enables very low step-down ratios.
The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.
Features
1. Wide 7.5-V to 100-V Input Range
2. Integrated 100-V High-Side, and Low-Side Switches
3. No Schottky Required
4. Constant On-Time Control
5. No Loop Compensation Required
6. Ultra-Fast Transient Response
7. Nearly Constant Operating Frequency
https://www.ti.com/product/LM5017
Datasheet PDF Download : 
Others datasheet of same file :
L5017, L5017MR, LM5017, LM5017MR, LM5017MR/NOPB