LM1572MTC-3.3 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM1572MTC-3.3 is a current-mode step-down switching voltage regulator with fixed 3.3 V output. It accepts input voltages from 8.5 V to 16 V and provides a regulated 3.3 V rail. Housed in a 16-pin SOIC package for efficient DC-DC conversion in space-constrained designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LM1572MTC-3.3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Non-compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM1572MTC-3.3?
- Fixed 3.3 V output current-mode buck regulator accepting 8.5 V to 16 V input with integrated gate driver
- Current-mode control topology providing fast transient response and inherent cycle-by-cycle overcurrent protection
- 16-pin SOIC package enabling compact PCB layout for industrial and telecommunications power supply modules
- Input voltage range from 8.5 V to 16 V compatible with 12 V system bus for point-of-load 3.3 V generation
What is LM1572MTC-3.3 used for?
The LM1572MTC-3.3 is suited for 12 V to 3.3 V point-of-load DC-DC conversion in industrial control boards, networking equipment, and embedded computing modules. Its current-mode control ensures stable regulation under rapidly varying load conditions typical in processor and FPGA power supply designs. Telecommunications line cards and data acquisition systems that derive 3.3 V logic power from a 12 V backplane bus benefit from its fixed output configuration.
What are the specifications of LM1572MTC-3.3?
| Pbfree Code | No |
| Reach Compliance Code | Compliant |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 8.5V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 3.2A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 570kHz |
| Technology | BCDMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Tin/Lead (Sn85Pb15) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Non-compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM1572MTC-3.3 datasheet?
LM1572MTC-3.3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM1572MTC-3.3?
Compatible alternatives and drop-in replacements for LM1572MTC-3.3:
Switching Regulator, Current-mode, 2.6A, 345kHz Switching Freq-Max, CMOS, PDSO16
Frequently Asked Questions
What is the input voltage range of LM1572MTC-3.3 and what system bus voltages does it support?
The LM1572MTC-3.3 accepts input voltages from 8.5 V to 16 V with 15 V nominal, making it directly compatible with standard 12 V system bus voltages used in industrial control racks, ATX power systems, and telecom shelves. It converts this input to a fixed 3.3 V output for digital logic supply with current-mode buck topology.
Why is current-mode control in LM1572MTC-3.3 advantageous for dynamic load applications?
Current-mode control in LM1572MTC-3.3 senses the inductor current on a cycle-by-cycle basis, enabling fast inner-loop response to load transients without requiring large output capacitors. For a processor board with load steps from 100 mA to 500 mA in under 5 µs, the current-mode loop recovers the 3.3 V output within typically 10 µs with a standard 100 µF output capacitor.
How does the 16-pin SOIC package of LM1572MTC-3.3 influence PCB layout for switching regulators?
The 16-pin SOIC package provides a 10 mm x 6 mm footprint with 1.27 mm pin pitch, allowing routing of the switching node, bootstrap, and feedback traces in a tight layout that minimizes EMI. The wider pin spacing compared to TSSOP reduces parasitic inductance in the gate drive path, improving switching efficiency at frequencies above 100 kHz.
Which overcurrent protection mechanism does LM1572MTC-3.3 use to protect the power stage?
LM1572MTC-3.3 uses cycle-by-cycle peak current limiting inherent to current-mode control, terminating each switching cycle when the sensed inductor current reaches the programmed limit. This protects the external power MOSFET and inductor from damage during short-circuit events without requiring a separate current sense resistor, reducing BOM by 2-3 components in a typical 3.3 V/3 A buck converter design.
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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.
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