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Texas Instruments LM2852XMXA-2.5/NOPB
- Part No.:
- LM2852XMXA-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-2.5/NOPB.pdf
- Description:
- IC REG BUCK 2.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:210
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Product details
Overview
LM2852XMXA-2.5/NOPB from Texas Instruments is a 2 A synchronous buck DC-DC regulator with fixed 2.5 V output, 1.5 MHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ MOSFETs, and HTSSOP-14 package with exposed thermal pad. It delivers high-efficiency point-of-load power for FPGA core rails and portable computing systems.
For engineers reviewing the LM2852XMXA-2.5/NOPB datasheet, LM2852XMXA-2.5/NOPB pinout, LM2852XMXA-2.5/NOPB application, or LM2852XMXA-2.5/NOPB equivalent, key selection criteria include 1.5 MHz operation enabling compact filter design, factory-programmed 2.5 V output with ±2.25% tolerance at 25°C, split-rail AVIN/PVIN capability, and integrated type-three compensation eliminating external compensation components.
Technical Context
The LM2852XMXA-2.5/NOPB implements voltage-mode PWM control with internal oscillator set to 1.5 MHz (±25% over temperature), uses internal type-three compensation for loop stability, and features separate AVIN (logic bias) and PVIN (power FET supply) rails supporting optimized thermal and noise isolation. Its soft-start circuitry charges via internal 400 kΩ resistor and external CSS capacitor (1–50 nF).
Protection includes UVLO on AVIN (2.85 V rising threshold, 85 mV hysteresis), thermal shutdown at 165°C with 10°C hysteresis, and current-limit threshold of 2.75–4.95 A. The device operates across –40°C to +125°C junction temperature and achieves up to 96% peak efficiency at 3.3 V input / 2.5 V / 1 A output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.25% (2.4437–2.5563 V) at TJ = 25°C; factory EEPROM-programmed, no external feedback required |
| Max Output Current | 2 A continuous; supports transient loads up to current-limit threshold (2.75–4.95 A) |
| Switching Frequency | 1.5 MHz nominal (1050–1825 kHz over –40°C to +125°C); enables use of small inductors (e.g., 1–10 µH) and ceramic output capacitors |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN must be ≤ AVIN and ≥1.5 V - supports single-supply or split-rail operation |
| Efficiency | Up to 96% at PVIN = 3.3 V, VOUT = 2.5 V, ILOAD = 1 A; >84% down to 0.1 A load |
| Quiescent Current | 0.85 mA typical (non-switching, TJ = 25°C); 2 mA max over full temperature range |
| Shutdown Current | 10 µA typical (EN = 0 V, TJ = 25°C); 25 µA max over full temperature range |
Pinout & Package
LM2852XMXA-2.5/NOPB is housed in a 14-pin HTSSOP package (5.00 mm × 4.40 mm body, 0.65 mm pitch) with exposed thermal pad for enhanced power dissipation (RθJA = 39.2°C/W, RθJC(bot) = 1.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥2.85 V; may be tied to PVIN or separate low-noise rail |
| EN (Pin 2) | Enable control | Internally pulled up; connect to GND to disable; logic-high threshold is 75% of AVIN |
| SGND (Pin 3) | Signal ground reference | Reference for error amplifier and SNS pin; must be connected to clean analog ground plane |
| SS (Pin 4) | Soft-start timing | Charged by internal 400 kΩ resistor; external capacitor (1–50 nF) sets startup ramp time (e.g., 2.7 nF ≈ 3 ms) |
| NC (Pins 5, 12, 13) | No-connect | Must be left floating or tied to GND; no internal connection |
| PVIN (Pins 6, 7) | Power FET supply | Drives internal high-side and low-side MOSFETs; connects directly to input bulk capacitor |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate regulation; requires Kelvin trace routing |
| PGND (Pins 10, 11) | Power ground return | Low-impedance return path for switch currents; must tie to large copper pour or internal ground plane |
| SW (Pins 8, 9) | Switch node | Connects to output inductor; carries high di/dt; requires short, wide trace to minimize EMI and losses |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60 mΩ MOSFETs | Eliminates need for external power switches; reduces BOM count and layout complexity while maintaining 2 A capability |
| Factory-programmed 2.5 V output | Removes external resistor divider; ensures precise, stable output without calibration or trimming |
| Type-three internal compensation | Enables stable operation with standard ceramic or tantalum output capacitors without external compensation network |
| Split-rail AVIN/PVIN architecture | Allows independent optimization of logic supply (low noise) and power rail (high current), improving PSRR and thermal management |
| 1.5 MHz switching frequency | Supports ultra-compact filter design: 1–10 µH inductors and ≤100 µF ceramic capacitors reduce board area and cost |
Applications
| FPGA Core Power Supply | Portable Computing PMIC Sub-Rail |
|---|---|
Use Scenario: Delivering tightly regulated 2.5 V to Xilinx Spartan-7 or Intel MAX 10 FPGA core logic under dynamic load transients up to 2 A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing core voltage with fast transient response and <1% output deviation during 1 A/µs load steps. Use Value: Enables reliable FPGA configuration and operation with 96% efficiency at 1 A, reducing thermal load in space-constrained embedded modules. | Use Scenario: Generating 2.5 V auxiliary rail for USB-C PD controller, audio codec, or display interface in battery-powered tablets and 2-in-1 laptops. IC Role / Device Role / Timing Role: Secondary buck converter powered from main 3.3 V or 5 V system rail, delivering low-noise, low-quiescent-power 2.5 V supply. Use Value: Achieves <10 µA shutdown current and 0.85 mA operating IQ, extending battery runtime without sacrificing regulation accuracy. |
| Broadband Networking PHY Interface | Industrial IoT Sensor Hub Power |
Use Scenario: Powering Ethernet PHY ICs (e.g., DP83867IR) requiring 2.5 V at ≤1.2 A with strict ripple (<20 mVpp) and EMI compliance. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to PHY IC; uses 1.5 MHz switching to shift noise above sensitive 10–100 MHz bands. Use Value: Meets EN55022 Class B conducted emissions with minimal filtering due to high-frequency operation and integrated MOSFETs. | Use Scenario: Supplying 2.5 V to precision ADCs (e.g., ADS1262), low-power microcontrollers, and wireless SoCs (e.g., CC2652RB) in sealed environmental monitoring nodes. IC Role / Device Role / Timing Role: Primary DC-DC stage converting 3.6 V Li-ion or 5 V USB to stable 2.5 V reference rail with thermal shutdown protection. Use Value: Operates reliably from –40°C to +125°C with 165°C thermal shutdown and 10°C hysteresis, ensuring field longevity in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXA-2.5/NOPB | Same pinout and function but 500 kHz switching frequency; higher inductor/capacitor values required (e.g., 10–15 µH, 100–220 µF) | Better light-load efficiency below 100 mA; suited for thermally constrained but size-tolerant designs | Select when lower EMI at sub-MHz frequencies or legacy 500 kHz filter designs are prioritized over miniaturization |
| TPS62865ARGTR | 1.8–5.5 V input, 2.5 V fixed output, 2.5 A, 2.25 MHz; smaller 12-pin WQFN (2.5 mm × 2.5 mm); no split-rail AVIN/PVIN | Higher current rating and smaller footprint; lacks separate AVIN rail for noise-sensitive logic | Choose for ultra-compact layouts where 2.5 A headroom and WQFN thermal performance outweigh split-rail flexibility |
Compared with LM2852YMXA-2.5/NOPB, the LM2852XMXA-2.5/NOPB trades slightly lower light-load efficiency for 3× higher frequency, enabling 60% smaller magnetics and ceramics; versus TPS62865ARGTR, it retains AVIN/PVIN isolation critical for mixed-signal systems but occupies larger PCB area.
Availability
LM2852XMXA-2.5/NOPB is available at Aetrix Electronics and suitable for FPGA core power, portable computing subsystems, broadband networking PHY interfaces, and industrial IoT sensor hubs requiring stable component supply and long-term manufacturability.
Supply support for LM2852XMXA-2.5/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability DC-DC conversion.
The LM2852 product line delivers highly integrated synchronous buck regulators targeting space-constrained, thermally demanding point-of-load applications in communications, computing, and industrial systems - emphasizing ease of design, thermal robustness, and factory-programmed precision.
FAQ
What is the switching frequency of the LM2852XMXA-2.5/NOPB and how does it affect component selection?
The LM2852XMXA-2.5/NOPB operates at a nominal 1.5 MHz switching frequency (1050–1825 kHz over temperature). This high frequency allows use of smaller inductors (1–10 µH) and ceramic output capacitors (≤100 µF), significantly reducing solution size versus 500 kHz alternatives like the LM2852YMXA-2.5/NOPB. Inductor saturation current and capacitor ESR must still meet ripple and stability requirements per TI's recommended ranges in the datasheet.
Does the LM2852XMXA-2.5/NOPB require external feedback resistors to set its 2.5 V output?
No. The LM2852XMXA-2.5/NOPB has a factory-programmed 2.5 V output stored in internal EEPROM - no external feedback resistors are needed. This eliminates resistor tolerance errors and layout sensitivity, ensuring ±2.25% output accuracy at 25°C and simplifying design validation. The SNS pin connects directly to the load for remote sensing.
How does the split-rail AVIN/PVIN architecture of the LM2852XMXA-2.5/NOPB improve system performance?
The LM2852XMXA-2.5/NOPB separates AVIN (logic bias) and PVIN (power FET supply), allowing independent optimization: AVIN can be a clean, low-noise 3.3 V rail for analog circuits, while PVIN handles noisy high-current switching. This improves PSRR, reduces coupling of switching noise into sensitive analog blocks, and enables better thermal partitioning - a key advantage over single-rail regulators like the TPS62865ARGTR.
What thermal management features does the LM2852XMXA-2.5/NOPB include?
The LM2852XMXA-2.5/NOPB integrates thermal shutdown at 165°C with 10°C hysteresis, preventing damage during overload or poor airflow. Its HTSSOP-14 package includes an exposed thermal pad (RθJC(bot) = 1.7°C/W) that must be soldered to a large PCB copper pour. Combined with low RDS(on) MOSFETs (75/55 mΩ at 25°C), this enables 2 A operation at up to +125°C junction temperature with proper layout.
Can the LM2852XMXA-2.5/NOPB be used in automotive applications?
The LM2852XMXA-2.5/NOPB is specified for –40°C to +125°C junction temperature and meets AEC-Q100 stress test requirements per TI's product folder documentation. However, it is not officially qualified as AEC-Q100 Grade 2 or Grade 1. For production automotive use, consult TI's Automotive Qualified Products list and validate against ISO 16750-2 electrical transients and thermal cycling requirements before deployment.
LM2852XMXA-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.85V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2852XMXA-2.5/NOPB FAQ
1.How can I place an order for LM2852XMXA-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-2.5/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2852XMXA-2.5/NOPB reliable?
The price and inventory of LM2852XMXA-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXA-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-2.5/NOPB?
LM2852XMXA-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-2.5/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2852XMXA-2.5/NOPB?
For technical support, including LM2852XMXA-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-2.5/NOPB requirements.
6.How does Aetrix verify that LM2852XMXA-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-2.5/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2852XMXA-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-2.5/NOPB?
All LM2852XMXA-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-2.5/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2852XMXA-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM2852XMXA-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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