Overview
The LM5117PMH/NOPB is a synchronous buck controller produced by Texas Instruments, designed for step-down regulator applications from high voltage or widely varying input supplies. This controller utilizes current mode control with an emulated current ramp, providing inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM5117 is particularly suited for applications requiring reliable control over a wide range of input voltages, from 5.5 V to 65 V.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 20-Power HTSSOP (PWP) |
| Number of Pins | 20 |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 5.5 V to 65 V |
| Control Mode | Current Mode |
| Switching Frequency | 50 kHz to 750 kHz |
| Peak Gate Drives | 3.3 A |
| Output Voltage Range | 0.8 V to 62 V |
| Maximum Output Current | 20 A |
| Quiescent Current | 4.8 mA |
| Topology | Buck |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Key Features
- 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 for improved efficiency at light load conditions
- 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
- AEC-Q100 Qualified for Automotive Applications
Applications
The LM5117PMH/NOPB is suitable for a variety of applications, including:
- Automotive systems, given its AEC-Q100 qualification
- High voltage step-down regulators
- Power supplies requiring wide input voltage ranges
- Industrial power systems
- Telecommunications and networking equipment
- Server and data center power supplies
Q & A
- What is the input voltage range of the LM5117PMH/NOPB?
The input voltage range is from 5.5 V to 65 V.
- What is the operating temperature range of the LM5117PMH/NOPB?
The operating temperature range is -40°C to 125°C.
- What is the maximum output current of the LM5117PMH/NOPB?
The maximum output current is 20 A.
- Does the LM5117PMH/NOPB support frequency synchronization?
- What is the purpose of the diode emulation mode in the LM5117PMH/NOPB?
The diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.
- Is the LM5117PMH/NOPB qualified for automotive applications?
- What is the quiescent current of the LM5117PMH/NOPB?
The quiescent current is 4.8 mA.
- Does the LM5117PMH/NOPB have thermal shutdown protection?
- What is the precision of the voltage reference in the LM5117PMH/NOPB?
The voltage reference has a precision of 1.5%.
- Can the LM5117PMH/NOPB be programmed for soft-start and tracking?
