LM25011MYX/NOPB - 42V 2A Buck Regulator | Texas Instruments
MPN: LM25011MYX/NOPB 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 | $1.85 | $1,850.00 |
Drop-in alternatives for LM25011MYX/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:
LM25011Q1MYX/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM25011AMYX/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM25011AQ1MYX/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM5117MHX/NOPB
β Drop-Inβ In Stock
$2.19 / Unit
View Datasheet βLM25011MYX/NOPB Maximum Ratings & Electrical Characteristics
| Function | Step-Down (Buck) |
| Output Type | Adjustable |
| Output Voltage Range | 2.51 V to 40 V |
| Maximum Output Current | 2 A |
| Input Voltage Range | 6 V to 42 V |
| Absolute Maximum Input Voltage | 45 V |
| Switching Frequency | Up to 2 MHz |
| Synchronous Rectifier | No |
| Number of Outputs | 1 |
| Control Architecture | Constant On-Time (COT) |
| Package | HVSSOP (DGQ) 10 pins, 3 mm x 4.9 mm |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Adjustable Current Limit | Yes |
LM25011MYX/NOPB Pin Configuration
| Pin 1 | SW β Switch node connection to inductor |
| Pin 2 | VIN β Input supply voltage |
| Pin 3 | VCC β Internal regulator output, bypass with capacitor |
| Pin 4 | RT β Timing resistor for on-time setting |
| Pin 5 | FB β Feedback input for output voltage regulation |
| Pin 6 | EN β Enable input, active high |
| Pin 7 | ILIM β Current limit set point |
| Pin 8 | GND β Ground |
| Pin 9 | GND β Ground |
| Pin 10 | GND β Ground (exposed pad) |
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
LM25011MYX/NOPB is suitable for 6 applications: Industrial Power Supplies, Automotive Bias Supplies, Telecom Equipment, Distributed Power Systems, Battery-Powered Devices, LED Lighting Drivers.
Industrial Power Supplies
The LM25011MYX/NOPB is ideal for industrial power supplies where a wide input voltage range (6V to 42V) is required. Its 2A output current can power control circuits, sensors, and communication interfaces. The constant on-time control provides fast transient response, ensuring stable operation under varying loads. The adjustable current limit allows designers to tailor the protection to the specific load, enhancing system reliability. The compact HVSSOP-10 package saves board space, making it suitable for space-constrained industrial equipment.
Recommended
Automotive Bias Supplies
In automotive applications, the LM25011MYX/NOPB can provide a regulated bias supply from the 12V or 24V battery bus. The wide input range accommodates load dump and cold crank conditions. The automotive-grade variant (LM25011Q1) is AEC-Q100 qualified, ensuring reliability in harsh environments. The constant on-time architecture minimizes external components, reducing BOM cost and board space. The adjustable current limit protects against short circuits and overcurrent conditions, which is critical in automotive systems.
Recommended
Telecom Equipment
Telecom equipment often requires multiple voltage rails from a 48V input. The LM25011MYX/NOPB can step down 48V to lower voltages like 5V or 3.3V for logic circuits. Its 2A output current is sufficient for many telecom modules. The high switching frequency (up to 2MHz) allows the use of small inductors and capacitors, reducing board space. The constant on-time control provides excellent line and load transient response, which is important in telecom applications where load steps are common.
Recommended
Distributed Power Systems
In distributed power architectures, the LM25011MYX/NOPB can be used as a point-of-load (POL) converter to generate local voltages from a common bus. Its wide input range and adjustable output make it flexible for various POL requirements. The constant on-time control simplifies design and reduces component count, which is beneficial in multi-rail systems. The adjustable current limit allows precise protection setting for each rail. The small package enables dense board layouts, improving power density.
Recommended
Battery-Powered Devices
For battery-powered devices, the LM25011MYX/NOPB can efficiently step down battery voltage to the required logic level. Its wide input range supports various battery chemistries, from 2-cell Li-ion (up to 8.4V) to 24V lead-acid. The high efficiency extends battery life. The low quiescent current in shutdown mode helps conserve power. The constant on-time control provides fast response to load changes, which is important in devices with intermittent high-current loads.
Recommended
LED Lighting Drivers
The LM25011MYX/NOPB can be configured as a constant-current LED driver by using the adjustable current limit feature. The wide input voltage range allows it to operate from various AC/DC adapters or battery sources. The constant on-time control provides good regulation and dimming capability. The 2A output current can drive multiple high-power LEDs in series. The compact package and high efficiency make it suitable for LED lighting applications where space and thermal management are critical.
Recommended
Recommended Products Summary
Engineering reference data for LM25011MYX/NOPB β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM25011Q1MYX/NOPB | LM25011AMYX/NOPB | LM25011AQ1MYX/NOPB | LM5117MHX/NOPB |
|---|---|---|---|---|---|
| Package | HVSSOP (DGQ) 10 | HVSSOP (DGQ) 10 | HVSSOP (DGQ) 10 | HVSSOP (DGQ) 10 | HVSSOP (DGQ) 10 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 6V to 42V | 6V to 42V | 6V to 42V | 6V to 42V | 6V to 42V |
| Output Current | 2A | 2A | 2A | 2A | 5A |
| Output Voltage Range | 2.51V to 40V | 2.51V to 40V | 2.51V to 40V | 2.51V to 40V | 1.215V to 42V |
| Switching Frequency | Up to 2MHz | Up to 2MHz | Up to 2MHz | Up to 2MHz | Up to 1MHz |
| Automotive Grade | No | Yes (AEC-Q100) | No | Yes (AEC-Q100) | No |
| Low-Dropout Operation | No | No | Yes | Yes | No |
Key Differentiators
- Constant on-time control eliminates loop compensation (vs LM5117MHX/NOPB)
- Wide input voltage range up to 42V (vs TPS54302DDCR)
- Adjustable current limit (vs LM5117MHX/NOPB)
Design Notes
For optimal performance, place the input capacitor (10uF) and output capacitor (100uF) as close to the VIN and SW pins as possible. Use a solid ground plane to minimize parasitic inductance. The exposed pad (pin 10) should be soldered to the ground plane for thermal dissipation. Keep the feedback trace short and away from the switch node to avoid noise coupling.
The LM25011MYX/NOPB uses a constant on-time control scheme. The on-time is set by an external resistor (RT) and is inversely proportional to input voltage. To maintain stable operation, ensure the RT resistor value is chosen according to the datasheet formula. The switching frequency can vary with load and input voltage, so verify that the inductor and capacitor values are appropriate for the expected frequency range.
The power dissipation in the LM25011MYX/NOPB is primarily due to conduction losses in the internal MOSFET and switching losses. At 2A output, the junction temperature rise can be significant. Use the thermal resistance (theta_JA) of the HVSSOP-10 package (approximately 40Β°C/W) to calculate the maximum power dissipation. For high ambient temperatures, consider adding a copper area on the PCB to improve heat dissipation.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use LM25011Q1 for automotive.
