LM5116MH Part Information
Details for LM5116MH by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
Part Description
The LM5116 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-bycycle 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 1 MHz. The LM5116 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 low quiescent current shutdown disables the controller and consumes less than 10 µA of total input current. Additional features include a high-voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle-by-cycle current limit, and adjustable line undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.
Part Downloads
Download PCB Footprint from Ultra Librarian
Part Features
- Automatic Switch to External Bias Supply
- Create a Custom Design Using the LM5116 with
- Drives Standard or Logic Level MOSFETs
- Emulated Peak Current Mode
- Free-run or Synchronous Operation to 1 MHz
- HTSSOP-20 Exposed Pad
- Low IQ Shutdown (< 10 u00b5A)
- Optional Diode Emulation Mode
- Precision 1.5% Voltage Reference
- Programmable Current Limit
- Programmable Line Undervoltage Lockout
- Programmable Output from 1.215 V to 80 V
- Programmable Soft-Start
- Robust 3.5-A Peak Gate Drive
- Thermal Shutdown
- Wide Operating Range Up to 100 V
Part Specifications
| Supply Voltage Min | 4.75V |
| Supply Voltage Max | 15V |
| No. of Outputs | 1 Output, 1Outputs |
| Duty Cycle (%) | 98% |
| Controller IC Case Style | TSSOP |
| No. of Pins | 20Pins |
| Switching Frequency | 1MHz |
| Topology | Synchronous Buck (Step Down) |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 125°C |
| Product Range | - |
| Automotive Qualification Standard | - |
| RoHS Phthalates Compliant | Yes |
| MSL | - |
| SVHC | No SVHC (27-Jun-2018) |
| Operating Temperature Range | -40°C to +150°C |
| Primary Input Voltage | 100V |
Alternative Part Descriptions
- DC DC Cntrlr Single-OUT Sync Buck 6V to 100V Input 20-Pin TSSOP EP Rail | Avnet America