Overview
The LM5116WG/NOPB, produced by Texas Instruments, is a high-voltage synchronous buck controller designed for step-down regulator applications. It operates from a high-voltage or widely varying input supply, making it suitable for various industrial and automotive applications. The controller uses emulated peak current mode control, which provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. This control method reduces noise sensitivity, allowing reliable control even at very small duty cycles necessary in high-input voltage applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 6 V | - | 100 V | V |
| Output Voltage Range | 1.215 V | - | 80 V | V |
| Operating Frequency Range | 50 kHz | - | 1 MHz | Hz |
| Gate Drive Current (Peak) | - | 3.5 A | - | A |
| Quiescent Current (Shutdown) | - | < 10 µA | - | µA |
| Voltage Reference Accuracy | - | 1.5% | - | % |
| Thermal Shutdown Temperature | - | 170 °C | - | °C |
| Package Type | - | HTSSOP-20 | - | - |
Key Features
- Emulated peak current mode control for inherent line feed-forward and cycle-by-cycle current limiting.
- Wide operating range up to 100 V input voltage.
- Low quiescent current shutdown (< 10 µA).
- Drives standard or logic level MOSFETs.
- Robust 3.5-A peak gate drive.
- Free-run or synchronous operation up to 1 MHz.
- Optional diode emulation mode for improved efficiency at light load conditions.
- Programmable output voltage from 1.215 V to 80 V.
- Precision 1.5% voltage reference.
- Programmable current limit and soft start.
- Programmable line undervoltage lockout.
- Automatic switch to external bias supply.
- Thermal shutdown protection.
- Exposed pad in HTSSOP-20 package for improved thermal dissipation.
Applications
- Automotive infotainment systems.
- Industrial DC-DC motor drivers.
- Automotive USB adapters.
- Telecom servers.
Q & A
- What is the input voltage range of the LM5116?
The input voltage range of the LM5116 is from 6 V to 100 V.
- What is the operating frequency range of the LM5116?
The operating frequency range of the LM5116 is from 50 kHz to 1 MHz.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is less than 10 µA.
- Does the LM5116 support diode emulation mode?
- What is the precision of the voltage reference?
The voltage reference has a precision of 1.5%.
- Can the LM5116 be synchronized to an external clock?
- What is the thermal shutdown temperature of the LM5116?
The thermal shutdown temperature of the LM5116 is 170 °C.
- What type of package does the LM5116 come in?
The LM5116 comes in an HTSSOP-20 package with an exposed pad for thermal dissipation.
- Can the LM5116 drive logic level MOSFETs?
- What is the peak gate drive current of the LM5116?
The peak gate drive current of the LM5116 is 3.5 A.
