LM5116 Wide Range Synchronous Buck Controller IC - HTSSOP-20 Package

LM5116 Wide Range Synchronous Buck Controller IC (HTSSOP-20) is a high-voltage synchronous buck controller from Texas Instruments designed for efficient DC-DC step-down power supplies operating from a wide input voltage range of 6V to 100V. It uses emulated peak current mode control for excellent line regulation, cycle-by-cycle current limiting, and easy loop compensation. The controller drives external high-side and low-side N-channel MOSFETs, making it suitable for high-power industrial, automotive, and telecom applications. It supports switching frequencies from 50kHz to 1MHz and integrates programmable soft-start, programmable current limit, thermal shutdown, and undervoltage lockout for reliable operation.

LM5116 Wide Range Synchronous Buck Controller IC Datasheet

Features

1. Wide Input Voltage Range: 6V to 100V
2. Emulated Peak Current Mode Control
3. Synchronous Buck Controller
4. Drives External High-side and Low-side N-Channel MOSFETs
5. 3.5A Peak Gate Drive Capability
6. Adjustable Output Voltage from 1.215V to 80V
7. Programmable Switching Frequency (50kHz to 1MHz)
8. Precision 1.215V Feedback Reference (±1.5%)
9. Programmable Soft-Start
10. Programmable Current Limit
11. Programmable Line Undervoltage Lockout (UVLO)
12. Optional Diode Emulation Mode for Improved Light Load Efficiency
13. Automatic Switch to External Bias Supply (VCCX)
14. Frequency Synchronization Capability
15. Low Shutdown Current (<10µA)
16. Thermal Shutdown Protection
17. HTSSOP-20 Package with Exposed Thermal Pad

Specifications

Parameter	Specification
Product Type	Wide Range Synchronous Buck Controller
Manufacturer	Texas Instruments
Part Number	LM5116
Topology	Synchronous Buck Controller
Input Voltage Range	6V to 100V
Maximum Input Voltage	100V
Output Voltage	1.215V to 80V (Programmable)
Feedback Reference Voltage	1.215V ±1.5%
Switching Frequency	50kHz to 1MHz
Typical Oscillator Frequency	200kHz (RT = 16kΩ)
Gate Drive Peak Source Current	1A (High Side), 1.8A (Low Side)
Gate Drive Peak Sink Current	2.2A (High Side), 3.5A (Low Side)
Shutdown Current	Less than 10µA
VCC Regulation	7.4V Typical
Soft Start	Programmable
Current Limit	Programmable, Cycle-by-Cycle
Enable Threshold	3.3V (Typical)
UVLO Threshold	1.215V Typical
Operating Junction Temperature	-40°C to +125°C
Thermal Shutdown	170°C Typical
Package	HTSSOP-20 with Exposed Pad
Mounting Type	Surface Mount (SMD)

Applications

• Automotive Infotainment Systems
• Automotive USB Chargers
• Industrial DC-DC Converters
• Industrial Motor Drivers
• Telecom Servers
• High Voltage Buck Power Supplies
• Battery Powered Equipment
• Distributed Power Systems
• Embedded Power Modules
• Industrial Automation Equipment

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Package Includes

1 × LM5116 Wide Range Synchronous Buck Controller IC (HTSSOP-20)