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LM5117-Q1 is Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
Device Temperature Grade 1: -40°C to 125°C
Ambient Operating Temperature Range
Emulated Peak Current Mode Control
Wide Operating Range from 5.5 V to 65 V
Robust 3.3-A Peak Gate Drives
Adaptive Dead-Time Output Driver Control
Free-Run or Synchronizable Clock up to 750 kHz
Optional Diode Emulation Mode
Programmable Output from 0.8 V
Precision 1.5% Voltage Reference
Analog Current Monitor
Programmable Current Limit
Hiccup Mode Overcurrent Protection
Programmable Soft-Start and Tracking
Programmable Line Undervoltage Lockout
Programmable Switchover to External Bias Supply
Thermal Shutdown
Description for the LM5117
The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.
The operating frequency is programmable from 50 kHz to 750 kHz. The LM5117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.
TOPFAST CHIP is a distributor of PLC industrial control equipment. We currently sell PLC products including: SIMATIC; INOVANCE; PEPPERL+FUCHS; Schneider; Mitsubishi; Allen Bradley; ABB; Omron. We are confident that we offer a wide range of products that we hope will meet your requirements. We look f... TOPFAST CHIP is a distributor of PLC industrial control equipment. We currently sell PLC products including: SIMATIC; INOVANCE; PEPPERL+FUCHS; Schneider; Mitsubishi; Allen Bradley; ABB; Omron. We are confident that we offer a wide range of products that we hope will meet your requirements. We look f...
