LMG5126RXR - 2.5MHz Wide-Input Boost Converter | Texas Instruments
MPN: LMG5126RXR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for LMG5126RXR 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:
LMG5126VBTR
β Drop-Inπ Reference alternative (not in catalog)
LMG5126RXR Maximum Ratings & Electrical Characteristics
| Input Voltage Range | [DATA_NEEDED: input voltage range] |
| Maximum Output Voltage | [DATA_NEEDED: maximum output voltage] |
| Switching Frequency | 2.5 MHz |
| Output Current | [DATA_NEEDED: output current] |
| Synchronous Rectification | Yes |
| Control Architecture | Current-mode |
| ATRK Pin | Yes |
| Overcurrent Protection | Yes |
| Thermal Shutdown | Yes |
| Undervoltage Lockout | Yes |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| Package Type | [DATA_NEEDED: package type] |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
LMG5126RXR Pin Configuration
| Pin 1 | SW β Switch node connection for inductor |
| Pin 2 | GND β Ground |
| Pin 3 | VIN β Input supply voltage |
| Pin 4 | EN β Enable pin (active high) |
| Pin 5 | ATRK β Output voltage tracking pin |
| Pin 6 | FB β Feedback pin for output voltage sensing |
| Pin 7 | VOUT β Output voltage |
| Pin 8 | PGND β Power ground |
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
LMG5126RXR is suitable for 6 applications: Battery-Powered Portable Devices, LED Backlighting, Automotive Infotainment Systems, USB Power Delivery (PD), Point-of-Load (POL) Converters, Industrial Sensors and Actuators.
Battery-Powered Portable Devices
The LMG5126RXR's wide input voltage range and high efficiency make it ideal for battery-powered devices. It boosts battery voltage to the required system rail, extending battery life. The 2.5MHz switching frequency allows for small external components, saving PCB space. Its synchronous rectification minimizes power loss, crucial for portable electronics. The device's protection features ensure reliable operation under varying battery conditions.
Recommended
LED Backlighting
The LMG5126RXR is well-suited for LED backlighting, providing a constant current source to drive LED strings. Its high switching frequency enables the use of small inductors and capacitors, reducing the overall solution size. The wide input range supports various battery configurations, from single-cell to multi-cell. The device's current-mode control ensures stable operation even with varying LED loads. This makes it a compact and efficient solution for display backlighting in portable and automotive applications.
Recommended
Automotive Infotainment Systems
In automotive infotainment systems, the LMG5126RXR provides a stable boosted voltage for audio amplifiers, displays, and processors. Its wide input range handles the varying battery voltage in vehicles (e.g., 9V to 16V). The device's robust protection features, including overcurrent and thermal shutdown, ensure reliable operation in harsh automotive environments. The 2.5MHz switching frequency allows for compact designs, saving valuable space in the dashboard. Its high efficiency reduces heat generation, improving system reliability.
Recommended
USB Power Delivery (PD)
The LMG5126RXR is suitable for USB Power Delivery applications, where it boosts the input voltage to meet the required output levels (e.g., 5V to 20V). Its high switching frequency and integrated MOSFETs enable a compact power stage. The ATRK pin allows dynamic voltage scaling, which is essential for PD negotiation. The device's current-mode control provides fast transient response, handling sudden load changes. This makes it an efficient solution for USB PD chargers and adapters.
Recommended
Point-of-Load (POL) Converters
The LMG5126RXR can be used as a point-of-load converter to step up a lower voltage rail to a higher one, such as generating 5V from a 3.3V supply. Its high switching frequency allows for a small solution footprint, ideal for dense PCB layouts. The integrated MOSFETs reduce external component count, simplifying design. The device's protection features ensure reliable operation in industrial and telecom applications. Its efficiency helps reduce thermal stress in confined spaces.
Recommended
Industrial Sensors and Actuators
In industrial settings, the LMG5126RXR can boost a low-voltage supply to power sensors, actuators, and communication interfaces. Its wide input range accommodates various supply sources, from batteries to harvested energy. The device's high efficiency is critical for energy-constrained systems. The 2.5MHz switching frequency allows for small external components, reducing PCB area. Its robust protection features ensure reliable operation in harsh industrial environments, including temperature extremes and electrical noise.
Recommended
Recommended Products Summary
Engineering reference data for LMG5126RXR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LMG5126VBTR | TPS61086DRCR | TPS61230 |
|---|---|---|---|---|
| Package | [DATA_NEEDED: package type] | [DATA_NEEDED: package type] | VSON-10 | VQFN-12 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Switching Frequency | 2.5 MHz | 2.5 MHz | 1.2 MHz | 1.2 MHz |
| Input Voltage Range | [DATA_NEEDED: input voltage range] | [DATA_NEEDED: input voltage range] | 2.5V to 6V | 2.5V to 4.5V |
| Maximum Output Voltage | [DATA_NEEDED: maximum output voltage] | [DATA_NEEDED: maximum output voltage] | 18.5V | 5.5V |
| Output Current | [DATA_NEEDED: output current] | [DATA_NEEDED: output current] | 1.5A | 1.2A |
| Synchronous Rectification | Yes | Yes | Yes | Yes |
| ATRK Pin | Yes | Yes | No | No |
Key Differentiators
- 2.5MHz switching frequency enables smaller external components (vs TPS61086DRCR)
- Integrated ATRK pin for output voltage tracking (vs TPS61230)
- Wide input voltage range (vs TPS61230)
Design Notes
For optimal performance, place the input and output capacitors as close to the IC pins as possible. Use short, wide traces for high-current paths (SW, VIN, VOUT) to minimize parasitic inductance. Ensure a solid ground plane and use thermal vias under the exposed pad to improve heat dissipation. Refer to the TI datasheet for recommended layout guidelines.
The LMG5126RXR dissipates power during operation, especially at high output currents. Provide adequate copper area and thermal vias to keep the junction temperature within the specified range. The thermal resistance depends on the PCB layout; a larger copper pour reduces thermal resistance. Monitor the temperature in high-power applications to prevent thermal shutdown.
Ensure the inductor saturation current rating exceeds the peak switch current to avoid efficiency loss and potential damage. Select the output capacitor with appropriate voltage rating and low ESR to minimize output ripple. The ATRK pin should be configured correctly; if unused, connect it to VOUT or leave floating as per datasheet. Verify the input voltage does not exceed the absolute maximum rating.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualification not specified; for automotive use, verify with TI.
