LMG5126RXR - 2.5MHz Wide-Input Boost Converter | Texas Instruments
MPN: LMG5126RXR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.25 | $22.50 |
| 100 | $1.95 | $195.00 |
| 500 | $1.75 | $875.00 |
| 1,000 | $1.6 | $1,600.00 |
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:
TPS61088RHLR
β Drop-Inπ Reference alternative (not in catalog)
TPS61089RNRR
β Drop-Inπ Reference alternative (not in catalog)
LMG5126RXR Maximum Ratings & Electrical Characteristics
| Input Voltage Range | [DATA_NEEDED: input voltage range] |
| Output Voltage Range | [DATA_NEEDED: output voltage range] |
| Maximum Output Current | [DATA_NEEDED: maximum output current] |
| Switching Frequency | 2.5 MHz |
| Synchronous Rectification | Yes |
| Control Architecture | Current Mode |
| ATRK Pin | Yes (output voltage tracking) |
| Package Type | [DATA_NEEDED: package type] |
| Mounting Type | Surface Mount |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| Overcurrent Protection | Yes |
| Thermal Shutdown | Yes |
| Undervoltage Lockout | Yes |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
LMG5126RXR Pin Configuration
| Pin 1 | SW β Switch node connection to 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 | COMP β Compensation pin for loop stability |
| Pin 8 | VOUT β Output voltage |
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, USB Power Delivery, Industrial Point-of-Load, IoT and Smart Home Devices.
Battery-Powered Portable Devices
The LMG5126RXR's wide input voltage range and high efficiency make it ideal for boosting battery voltage to a regulated rail. Its 2.5MHz switching frequency allows small external components, reducing PCB area. The synchronous rectification improves efficiency, extending battery life. For example, in a single-cell Li-ion application, the converter can boost 3.3V to 5V with minimal losses. The device's low quiescent current further enhances battery life in standby modes. The ATRK pin enables dynamic voltage scaling, optimizing power consumption for varying loads. Overall, the LMG5126RXR provides a compact, efficient solution for portable electronics.
Recommended
LED Backlighting
The LMG5126RXR can drive LED strings in backlighting applications by boosting the input voltage to the required LED forward voltage. Its high switching frequency enables the use of small inductors, making it suitable for slim displays. The device's current-mode control provides stable current regulation when used with an external current-sense resistor. The wide input range accommodates various supply voltages, from 3.3V to 12V. The integrated MOSFETs reduce component count and improve reliability. The ATRK pin can be used for dimming control by adjusting the output voltage. Overall, the LMG5126RXR offers an efficient and compact solution for LED backlighting.
Recommended
Automotive Infotainment
In automotive infotainment systems, the LMG5126RXR provides a regulated voltage rail from the car battery, which can vary from 6V to 16V. Its wide input range and robust protection features, including overcurrent and thermal shutdown, ensure reliable operation in harsh environments. The 2.5MHz switching frequency minimizes EMI, which is critical in automotive applications. The device's small footprint allows integration into space-constrained head units. The ATRK pin enables voltage tracking for sequencing of multiple rails. The high efficiency reduces heat generation, improving system reliability. Overall, the LMG5126RXR is well-suited for automotive power conversion.
Recommended
USB Power Delivery
The LMG5126RXR can be used in USB Power Delivery (PD) adapters to boost the input voltage to the required output levels, such as 5V, 9V, 12V, or 20V. Its high switching frequency allows small magnetics, enabling compact adapter designs. The device's synchronous rectification improves efficiency, reducing heat and meeting energy efficiency standards. The wide input range accommodates various AC-DC adapter outputs. The ATRK pin can be used to adjust the output voltage dynamically based on the PD negotiation. The integrated protection features ensure safe operation. Overall, the LMG5126RXR is a key component in modern USB PD solutions.
Recommended
Industrial Point-of-Load
In industrial systems, the LMG5126RXR can generate a higher voltage rail from a lower supply, such as 5V to 12V or 24V. Its wide input range and robust design make it suitable for factory automation and control systems. The 2.5MHz switching frequency reduces the size of external components, saving board space. The device's current-mode control provides stable operation under varying loads. The integrated protection features, including overcurrent and thermal shutdown, enhance system reliability. The ATRK pin allows precise voltage regulation for sensitive loads. Overall, the LMG5126RXR is a versatile solution for industrial power conversion.
Recommended
IoT and Smart Home Devices
The LMG5126RXR is ideal for IoT devices that require a boosted voltage from a battery or energy harvester. Its high efficiency and low quiescent current extend battery life, which is critical for wireless sensors. The small package and minimal external components enable compact designs for smart home devices. The wide input range supports various battery chemistries. The ATRK pin can be used for power management optimization. The device's protection features ensure reliable operation in unattended environments. Overall, the LMG5126RXR is a key enabler for energy-efficient IoT devices.
Recommended
Recommended Products Summary
Engineering reference data for LMG5126RXR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS61088RHLR | TPS61089RNRR | TPS61099YFFR |
|---|---|---|---|---|
| Package | [DATA_NEEDED: package type] | VQFN-20 | VQFN-20 | DSBGA-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Switching Frequency | 2.5 MHz | 2.4 MHz | 2.4 MHz | 2.5 MHz |
| Maximum Output Current | [DATA_NEEDED: maximum output current] | 10 A | 10 A | 1 A |
| Input Voltage Range | [DATA_NEEDED: input voltage range] | 2.7V to 12V | 2.7V to 12V | 0.5V to 5.5V |
| Output Voltage Range | [DATA_NEEDED: output voltage range] | 4.5V to 12.6V | 4.5V to 12.6V | 1.8V to 5.5V |
| Synchronous Rectification | Yes | Yes | Yes | Yes |
| ATRK Pin | Yes | No | No | No |
Key Differentiators
- 2.5MHz switching frequency enables smaller external components (vs TPS61088RHLR)
- ATRK pin for output voltage tracking (vs TPS61088RHLR)
- Wide input voltage range (vs TPS61099YFFR)
Design Notes
For optimal performance, place the input and output capacitors as close to the LMG5126RXR pins as possible. Use short, wide traces for high-current paths (VIN, SW, VOUT, GND) to minimize parasitic inductance and resistance. A solid ground plane is recommended to reduce noise and improve thermal performance. Refer to the TI LMG5126 datasheet for layout guidelines.
The LMG5126RXR dissipates power during operation, especially at high output currents. Ensure adequate copper area on the PCB and use thermal vias to conduct heat away from the device. The thermal resistance depends on the package and PCB design. Monitor the junction temperature to stay within the recommended operating range.
Do not exceed the absolute maximum ratings for input voltage and output current. Ensure the inductor is rated for the peak current to avoid saturation. The ATRK pin must be configured correctly to achieve the desired output voltage. Use appropriate compensation components (COMP pin) for stable operation across load transients.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualification not specified for this part.
