LM25011QMYX/NOPBQ1 - 42V 2A Buck Regulator Q1 | TI
MPN: LM25011QMYX/NOPBQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.7 | $47.00 |
| 100 | $4.1 | $410.00 |
| 500 | $3.65 | $1,825.00 |
| 1,000 | $3.2 | $3,200.00 |
Drop-in alternatives for LM25011QMYX/NOPBQ1 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:
LM25011MYX/NOPB
β Drop-Inβ In Stock
$1.45 / Unit
View Datasheet βLM25011Q1MY/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM25011AMHX/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM25011AQ1MYX/NOPB
β Drop-Inπ Reference alternative (not in catalog)
LM25011QMYX/NOPBQ1 Maximum Ratings & Electrical Characteristics
| Topology | Step-Down (Buck), Non-Synchronous |
| Control Topology | Constant On-Time (Current/Voltage Mode Emulation) |
| Input Voltage Range | 6 V to 42 V |
| Absolute Maximum Input Voltage | 45 V |
| Output Voltage Range | 2.51 V to 40 V |
| Maximum Output Current | 2 A |
| Number of Outputs | 1 |
| Output Type | Adjustable |
| Switching Frequency (max) | 2000 kHz |
| Quiescent Current (typ) | 1.2 mA |
| Current Limit | Adjustable |
| Internal Switch | Integrated 2-A N-Channel Buck Switch |
| Package | 10-HVSSOP (DGQ) Exposed Pad, 3 mm x 4.9 mm |
| Operating Temperature | -40C to +125C (AEC-Q100 Grade 1) |
| Qualification | AEC-Q100 Grade 1 (Automotive) |
| Mounting Type | Surface Mount |
| Synchronous Rectifier | No |
LM25011QMYX/NOPBQ1 Pin Configuration
| Pin 1 | VIN β Input supply voltage, 6V to 42V |
| Pin 2 | SS β Soft-start programming pin |
| Pin 3 | FB β Feedback input from output voltage divider |
| Pin 4 | AGND β Analog ground reference |
| Pin 5 | CS β Current sense input for adjustable current limit |
| Pin 6 | SGND β Power/signal ground |
| Pin 7 | RON β On-time programming resistor, sets switching frequency |
| Pin 8 | SW β Switch node to buck inductor |
| Pin 9 | PGND β Power ground for internal buck switch |
| Pin 10 | BST β Bootstrap capacitor for high-side gate drive |
| Pin 11 | PAD β Exposed thermal pad, solder to ground plane |
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
LM25011QMYX/NOPBQ1 is suitable for 6 applications: Automotive 12V Point-of-Load Supply, Industrial 24V Bus Regulation, LED Driver Front End, Automotive ADAS and Cluster Power, Battery-Powered Test and Portable Instruments, Post-Regulation After Wide-Vin Automotive Modules.
Automotive 12V Point-of-Load Supply
The LM25011-Q1 converts automotive 12V battery rails (6V-42V, 45V abs max) to regulated 5V or 3.3V loads at up to 2A. Its AEC-Q100 Grade 1 qualification (-40C to +125C) and load-dump survivability make it well matched to body electronics and infotainment modules. The constant on-time control gives fast transient response to headlight or actuator load steps without loop compensation, while the adjustable current limit permits a smaller, lower-cost inductor.
Recommended
Industrial 24V Bus Regulation
Industrial 24V control panels and PLC I/O modules commonly swing 18V-30V; the LM25011-Q1's 42V input ceiling provides generous headroom, and its 2.51V-40V adjustable output can directly serve 3.3V, 5V, 12V, or 24V sub-rails at up to 2A. Constant on-time operation keeps BOM count low with no external compensation network, and the integrated 2A N-channel switch removes the external MOSFET needed by controller solutions, shrinking PCB area in DIN-rail modules.
Recommended
LED Driver Front End
With adjustable current limit and constant on-time current-mode emulation, the LM25011-Q1 serves as a regulated front-end supply for automotive LED strings and signage, converting 12V or 24V inputs to a stable bus feeding a dedicated LED driver. Tight peak-current control through the external sense resistor allows inductor downsizing, and 2MHz operation permits magnetics small enough for slim luminaire profiles. The exposed-pad HVSSOP package manages the 2A switch dissipation with modest copper pour.
Recommended
Automotive ADAS and Cluster Power
ADAS camera/sensor modules and digital clusters need quiet, stable rails from a 12V car battery with wide transients. The LM25011-Q1 provides the primary 5V step from 12V with 42V surge tolerance and AEC-Q100 Grade 1 qualification, feeding downstream point-of-load LDOs for image sensors and processors. Its fixed-frequency-capable operation up to 2MHz keeps switching harmonics outside sensitive AM/FM bands, and adjustable current limit supports peak-load headroom for burst data processing.
Recommended
Battery-Powered Test and Portable Instruments
Battery stacks from 12V lead-acid to 36V Li-ion chains fall inside the LM25011-Q1's 6V-42V input window, letting one design cover multiple battery configurations at 2A output. The 1.2mA typical quiescent current limits idle drain on battery-powered instruments, and COT control maintains regulation over widely varying input without mode changes. The compact 3mm x 4.9mm HVSSOP exposed-pad package suits handheld enclosures where board area and thermal margin are both constrained.
Recommended
Post-Regulation After Wide-Vin Automotive Modules
Many automotive designs place a 60V-rated trans-regulator at the connector and follow it with a high-efficiency mid-bus converter. The LM25011-Q1 fits this second stage: converting a 6V-42V intermediate bus to the main 5V or 3.3V rail at 2A with high efficiency and simple external parts. Adjustable current limit protects against board shorts, and the wide output range (up to 40V) supports 12V display and actuator rails as well as logic supplies.
Recommended
Recommended Products Summary
Engineering reference data for LM25011QMYX/NOPBQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM25011MYX/NOPB | LM25011Q1MY/NOPB | LM25011AMHX/NOPB |
|---|---|---|---|---|
| Package | 10-HVSSOP (DGQ) Exposed Pad | 10-HVSSOP (DGQ) - same | 10-HVSSOP (DGQ) - same | 10-HVSSOP (DGQ) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 6 V to 42 V (45 V abs max) | 6 V to 42 V | 6 V to 42 V | 6 V to 42 V |
| Output Current | 2 A | 2 A | 2 A | 2 A |
| AEC-Q100 Grade | Grade 1 (-40C to +125C) | Not qualified (industrial) | Grade 1 | Not qualified |
| Low-Dropout Feature | No (standard LM25011 die) | No | No | Yes (LM25011A variant) |
| Switching Frequency (max) | 2000 kHz | 2000 kHz | 2000 kHz | 2000 kHz |
| Control Topology | Constant On-Time | Constant On-Time | Constant On-Time | Constant On-Time |
| Current Limit | Adjustable | Adjustable | Adjustable | Adjustable |
Key Differentiators
- AEC-Q100 Grade 1 automotive qualification (vs LM25011MYX/NOPB)
- Adjustable current limit enables smaller inductor (vs LM25011AMHX/NOPB)
- Integrated 2A N-channel buck switch with COT control (vs TPS54360QDDARQ1)
Design Notes
Solder the exposed thermal pad to a solid ground-plane copper pour with an array of thermal vias. The integrated 2A buck switch dissipates conduction and switching losses in the die, and the HVSSOP-10 rating depends entirely on the pad connection. Per TI datasheet layout guidelines, keep the SW node, bootstrap capacitor, and input ceramic capacitor loops minimal.
Size the current-limit sense resistor so peak inductor current (DC load plus half ripple) stays below inductor saturation at maximum load and minimum input voltage. Using an undersized inductor that saturates at load transients trips the current limit and can cause output droop. Refer to the design equations in TI datasheet SNVS for the CS threshold and RON frequency selection.
Do not exceed 42V continuous input (45V absolute maximum); automotive load-dump above this requires a front-end TVS or a 60V-rated stage such as TPS54360-Q1. Use low-ESR ceramic output capacitors for COT stability, and keep the FB divider resistance low enough to avoid noise pickup. Ensure AGND, PGND, and SGND tie at a single point to avoid ground-loop offsets in the CS sense path.
Compliance Information
AEC-Q100 Grade 1 qualified per TI product page (LM25011-Q1, -40C to +125C). NOPB suffix indicates no Pb-bearing plating. RoHS status per TI product page.
