LM2651MTC-2.5 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM2651MTC-2.5 is a high-efficiency current-mode PWM step-down switching regulator with a fixed 2.5 V output in a 16-pin SOIC package. Accepting input voltages from 4 V to 14 V, it delivers regulated 2.5 V output with over 90% efficiency at full load. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LM2651MTC-2.5 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control for fast transient response and cycle-by-cycle current limiting in step-down regulation
- Fixed 2.5 V output simplifies BOM by eliminating external feedback resistors for standard logic supply rails
- Wide input voltage range from 4 V to 14 V accepting unregulated wall adapters and automotive 12 V sources
- 16-pin SOIC package with exposed pad option enables compact layout with efficient thermal management
Applications
The LM2651MTC-2.5 is used in point-of-load DC-DC conversion for DSP and FPGA core supplies, where a precise 2.5 V rail must be derived from a 5 V or 12 V bus at high efficiency. It suits telecom line cards, industrial instrumentation, and set-top boxes where regulated 2.5 V logic supply is needed with minimal heat dissipation. The current-mode control architecture also makes it well-suited for applications requiring fast load-step response such as DDR memory termination.
Specifications
| YTEOL | 0 |
| Additional Feature | SEATED HGT-NOM |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 14V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 10V |
| JESD-30 Code | R-PDSO-G16 |
| Number of Functions | 1 |
| Output Current-Max | 2.6A |
| Output Voltage-Max | 2.575V |
| Output Voltage-Min | 2.43V |
| Output Voltage-Nom | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Screening Level | TS 16949 |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 300kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM2651MTC-2.5:
Switching Regulator, Current-mode, 2.6A, 345kHz Switching Freq-Max, CMOS, PDSO16
Frequently Asked Questions
What input voltage range does LM2651MTC-2.5 accept, and can it operate from a 12 V automotive rail?
The LM2651MTC-2.5 accepts input voltages from 4 V to 14 V, which fully covers the 12 V automotive nominal rail and tolerates load-dump transients up to 14 V. This makes it a direct drop-in for step-down regulation in automotive accessories and 12 V industrial panels supplying a fixed 2.5 V logic output.
How does current-mode PWM control in LM2651MTC-2.5 benefit power supply stability?
Current-mode PWM samples the inductor current every switching cycle, inherently providing cycle-by-cycle overcurrent protection and reducing the output filter requirements. The control loop typically achieves a phase margin above 45° with a 22 µH inductor and 100 µF output capacitor, resulting in stable operation and fast recovery from load transients of up to 500 mA steps.
What output current can LM2651MTC-2.5 supply continuously for a 2.5 V logic rail?
The LM2651MTC-2.5 is rated to deliver up to 500 mA continuous output current at 2.5 V with an input voltage of 5 V to 14 V. Peak switch current limiting engages above 800 mA, protecting both the IC and external components from overload conditions in fault scenarios such as output short-circuit.
How does the fixed 2.5 V output of LM2651MTC-2.5 simplify design compared to an adjustable regulator?
The fixed 2.5 V output eliminates the 2 external feedback resistors and simplifies the feedback network layout, reducing PCB area and component count by at least 2 resistors and their associated bypass capacitors. This also removes trim-resistor tolerance errors, ensuring the output stays within the ±2% accuracy specification across the full -40°C to +125°C operating temperature range.
Related Guides
ADSP-BF548BBCZ-5A Blackfin DSP Design Guide: Clocking, DDR, and Peripheral Configuration
Complete design guide for the ADSP-BF548BBCZ-5A 533 MHz Blackfin DSP: PLL sequencing, DDR memory timing, power rail order, and peripheral configuration for HMI, audio, and communications applications.
Jun 11, 2026
CL05B104KO5NNNC & 0402 X7R MLCC Selection Guide: How to Choose a 100 nF Decoupling Capacitor
A practical guide to selecting 100 nF 0402 X7R MLCCs for bypass and decoupling. Compare CL05B104KO5NNNC, CL21B104KBCNNNC, CL05B103KB5NNNC and choose the right voltage rating, dielectric, and package.
Jun 11, 2026
ADSP-BF706BCPZ-4 Selection Guide: How to Choose a Blackfin+ DSP for Your Embedded Design
Compare ADSP-BF706BCPZ-4, BF548BBCZ-5A, and BF512BSWZ-4 on clock speed, memory, peripherals, and power to select the right Blackfin+ DSP.
Jun 10, 2026
ADC128S102 Selection Guide: How to Choose the Right 8-Channel 12-Bit SAR ADC
Compare ADC128S102 variants by supply voltage, temperature range, package, and qualification to pick the right 8-channel 12-bit SAR ADC for your design.
Jun 10, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”