LM5117PMH/NOPB - 5.5-65V Sync Buck Controller | Texas Instruments
MPN: LM5117PMH/NOPB β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.52 | $6.52 |
| 10 | $5.86 | $58.60 |
| 100 | $4.8 | $480.00 |
| 500 | $4.09 | $2,045.00 |
| 1,000 | $3.44 | $3,440.00 |
Drop-in alternatives for LM5117PMH/NOPB β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LM5117MHX/NOPB
β Drop-Inβ In Stock
$2.2 / Unit
View Datasheet βLM5117PMHE/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM25117
β Drop-Inπ Reference alternative (not in catalog)
LM5117QPMH/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM5117PMHX/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM5117PMH/NOPB Maximum Ratings & Electrical Characteristics
| Input Voltage Range | 5.5 V to 65 V |
| Output Type | Single Output |
| Control Method | Current Mode |
| Switching Frequency | Up to 530 kHz |
| Duty Cycle | 95% |
| Package | HTSSOP-20 (PWP) |
| Operating Temperature | -40Β°C to +125Β°C |
| Number of Outputs | 1 |
| Analog Current Monitor | Yes |
| Enable Pin | Yes |
| Thermal Shutdown | Yes |
| Reference Voltage | 1.5 V |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lifecycle Status | Active |
LM5117PMH/NOPB Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | VCC β Internal bias supply |
| Pin 3 | HB β High-side bootstrap |
| Pin 4 | HO β High-side gate driver output |
| Pin 5 | SW β Switch node |
| Pin 6 | LO β Low-side gate driver output |
| Pin 7 | PGND β Power ground |
| Pin 8 | CS β Current sense input |
| Pin 9 | RAMP β Ramp programming |
| Pin 10 | COMP β Compensation |
| Pin 11 | FB β Feedback |
| Pin 12 | SS β Soft-start |
| Pin 13 | EN β Enable |
| Pin 14 | RT β Frequency programming |
| Pin 15 | AGND β Analog ground |
| Pin 16 | CM β Current monitor output |
| Pin 17 | VCC β Internal bias supply |
| Pin 18 | VIN β Input supply voltage |
| Pin 19 | NC β No connect |
| Pin 20 | NC β No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LM5117PMH/NOPB is suitable for 6 applications: Industrial Power Supplies, Automotive Infotainment and Body Electronics, Telecom and Networking Equipment, High-Voltage Battery-Powered Systems, Reference Design PMP20808, Server and Datacenter Power.
Industrial Power Supplies
The LM5117PMH/NOPB is ideal for industrial power supplies requiring wide input voltage range and high efficiency. Its 5.5V to 65V input range accommodates 24V and 48V bus systems, while current-mode control provides excellent line and load transient response. The analog current monitor enables precise current sensing for system monitoring and protection, making it suitable for factory automation and process control equipment.
Recommended
Automotive Infotainment and Body Electronics
With a wide input range and -40Β°C to +125Β°C operating temperature, the LM5117PMH/NOPB is well-suited for automotive infotainment and body electronics. It can handle load-dump conditions and battery voltage variations. The enable pin allows power sequencing in multi-rail systems, and the analog current monitor supports battery current monitoring. This controller is used in reference designs for automotive power supplies.
Recommended
Telecom and Networking Equipment
The LM5117PMH/NOPB is designed for telecom and networking equipment that operates from 48V backplane supplies. Its wide input range and high efficiency reduce power loss in distributed power architectures. The programmable switching frequency up to 530kHz allows optimization of inductor size and efficiency. The current-mode control provides fast transient response for dynamic loads in routers and switches.
Recommended
High-Voltage Battery-Powered Systems
The LM5117PMH/NOPB is suitable for high-voltage battery-powered systems, such as electric vehicles and energy storage, where input voltage can vary widely. Its 5.5V to 65V input range covers battery stacks from 12V to 48V. The analog current monitor enables accurate state-of-charge estimation. The controller's high efficiency extends battery life, and the thermal shutdown protects against overtemperature conditions.
Recommended
Reference Design PMP20808
The LM5117PMH/NOPB is used in TI's PMP20808 reference design, which provides a 25V output at 18A from a 38V nominal input. This design demonstrates the controller's capability for high-current, high-efficiency step-down conversion. The reference design includes detailed schematics and layout guidelines, making it a valuable starting point for custom power supply designs.
Recommended
Server and Datacenter Power
The LM5117PMH/NOPB is used in server and datacenter power supplies that require high efficiency and wide input range. Its current-mode control provides fast transient response for CPU and memory loads. The analog current monitor allows precise power monitoring for energy management. The controller's high switching frequency reduces the size of magnetic components, enabling compact power modules.
Recommended
Recommended Products Summary
Engineering reference data for LM5117PMH/NOPB β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM5117MHX/NOPB | LM5117PMHE/NOPB | LM25117 |
|---|---|---|---|---|
| Package | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) | HTSSOP-20 (PWP) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 5.5V to 65V | 5.5V to 65V | 5.5V to 65V | 4.5V to 42V |
| Switching Frequency | Up to 530kHz | Up to 530kHz | Up to 530kHz | Up to 1MHz |
| Duty Cycle | 95% | 95% | 95% | 90% |
| Analog Current Monitor | Yes | Yes | Yes | No |
| Enable Pin | Yes | Yes | Yes | Yes |
| Operating Temperature | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C |
Key Differentiators
- Wide input voltage range of 5.5V to 65V (vs LM25117)
- Analog current monitor output (vs LM25117)
- Higher duty cycle of 95% (vs LM25117)
Design Notes
For optimal performance, place the LM5117PMH/NOPB close to the MOSFETs and inductor. Keep the gate drive traces short and wide to minimize inductance. The bootstrap capacitor for the high-side driver should be placed as close as possible to the HB and SW pins. Use a solid ground plane for PGND and AGND, connecting them at a single point near the IC.
The HTSSOP-20 package has an exposed pad that must be soldered to a copper area on the PCB for effective heat dissipation. The thermal resistance is approximately 40Β°C/W. For high-current applications, ensure adequate copper area and vias to transfer heat to other layers. Monitor the junction temperature to stay within the -40Β°C to +125Β°C range.
Ensure the current sense resistor is placed in the source of the low-side MOSFET for accurate current sensing. The RAMP pin requires a capacitor to set the emulated current ramp; choose the value according to the datasheet formula. Do not exceed the 65V input voltage rating, and use appropriate input bulk capacitors to handle transients.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use LM5117QPMH/NOPB for automotive.
