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Texas Instruments LM2852XMXAX-2.5
- Part No.:
- LM2852XMXAX-2.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXAX-2.5.pdf
- Description:
- IC REG BUCK 2.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,318
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Product details
Overview
LM2852XMXAX-2.5 from Texas Instruments is a 2A synchronous buck regulator with fixed 2.5V output, 1.5MHz switching frequency, 2.85–5.5V input range, internal 60-mΩ PFET/NFET switches, and voltage-mode control. It delivers point-of-load regulation for FPGA core rails and portable computing power stages.
For engineers reviewing the LM2852XMXAX-2.5 datasheet, LM2852XMXAX-2.5 pinout, LM2852XMXAX-2.5 application, or LM2852XMXAX-2.5 equivalent, key selection criteria include 1.5MHz operation enabling compact filter design, factory-programmed 2.5V output with ±2.25% tolerance at 25°C, thermal performance in HTSSOP-14 (RθJA = 39.2°C/W), and split-rail AVIN/PVIN capability for optimized biasing.
Technical Context
The LM2852XMXAX-2.5 implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its 1.5MHz oscillator enables use of sub-10µH inductors and ceramic output capacitors with ESR <10mΩ.
Split-rail architecture separates AVIN (2.85–5.5V logic supply) from PVIN (2.85–5.5V power FET supply), allowing independent optimization of control and power paths. Internal current-limit threshold is 2.75–4.95A over temperature, with thermal shutdown at 165°C and 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.25% (2.4437–2.5563V) at TJ = 25°C; factory-programmed, non-adjustable |
| Max Output Current | 2A continuous load; peak current limit 2.75–4.95A ensures robust overload handling |
| Switching Frequency | 1.5MHz nominal (1050–1825kHz over –40°C to 125°C); enables high-density layout with small L/C |
| Input Voltage Range | 2.85V to 5.5V on PVIN; AVIN supports same range but must be ≥ PVIN for proper biasing |
| Efficiency | Up to 96% at ILOAD = 1A, VIN = 3.3V → 2.5V; optimized for low-voltage, high-current PoL |
| Quiescent Current | 10µA shutdown current (TJ = 25°C); 2mA operating current (non-switching, TJ = –40°C to 125°C) |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14); RθJC(bot) = 1.7°C/W enables effective PCB heat sinking |
Pinout & Package
LM2852XMXAX-2.5 is housed in a thermally enhanced 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground plane for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥ PVIN and within 2.85–5.5V; decoupling critical for stability |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for enable, 25% for disable |
| SGND (Pin 3) | Signal ground reference | Separate from PGND; connects to error amp and sense circuitry; must be routed away from noisy nodes |
| SS (Pin 4) | Soft-start timing | Connects to external capacitor (1–50nF); sets startup ramp time; internal 400kΩ resistor defines RC time constant |
| PVIN (Pins 6,7) | Main power input | Supplies internal PFET/NFET switches; requires low-ESR bulk capacitor placed adjacent to pins |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate regulation; avoid routing near SW |
| SW (Pins 8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide traces and minimal loop area |
| PGND (Pins 10,11) | Power ground return | High-current return path for PFET/NFET; must connect to thermal pad and low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Eliminates need for external slope compensation; simplifies design vs current-mode for stable 1.5MHz operation |
| Integrated type-three compensation | On-chip compensation network ensures loop stability across recommended L/C/ESR ranges without external components |
| Split-rail AVIN/PVIN architecture | Enables independent optimization: AVIN powers logic at lower noise, PVIN drives power stage at higher efficiency |
| Internal 60-mΩ PFET/NFET switches | Reduces BOM count and conduction losses; 75mΩ PFET and 55mΩ NFET typical RDS(on) at 25°C |
| Thermal shutdown with hysteresis | 165°C trip point + 10°C hysteresis prevents thermal cycling; allows safe recovery after fault clearance |
Applications
| FPGA Core Power Supply | Portable Computing DC-DC Stage |
|---|---|
|
Use Scenario: Regulating 2.5V rail for FPGA I/O banks or auxiliary logic under dynamic load transients. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering up to 2A with fast transient response and tight line/load regulation. Use Value: Factory-set 2.5V eliminates external resistive divider; 1.5MHz switching enables <10µH inductors and reduces board space by >40% vs 500kHz solutions. |
Use Scenario: Powering SoC subsystems (e.g., memory interfaces, display controllers) in tablets and ultrabooks. IC Role / Device Role / Timing Role: High-efficiency step-down regulator converting 3.3V or 5V system rail to 2.5V load voltage. Use Value: 96% peak efficiency at 1A extends battery life; low 10µA shutdown current minimizes standby drain in sleep modes. |
| Broadband Networking PHY Power | Industrial Sensor Node Regulation |
|
Use Scenario: Supplying clean 2.5V to Ethernet PHYs or optical transceivers in access points and switches. IC Role / Device Role / Timing Role: Low-noise, high-PoL regulator with soft-start control to prevent inrush during hot-plug events. Use Value: SS pin enables programmable startup ramp (e.g., 3ms with 2.7nF); internal compensation rejects EMI from adjacent RF sections. |
Use Scenario: Providing stable 2.5V for precision ADCs, DACs, or microcontrollers in remote sensor nodes. IC Role / Device Role / Timing Role: Robust DC-DC converter operating across –40°C to 125°C junction temperature range. Use Value: Guaranteed 2.4437–2.5563V output tolerance over full temp range ensures data converter accuracy; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXAX-2.5 | 500kHz switching frequency; higher inductor values required (10–15µH vs 6.8–10µH); lower light-load efficiency | Better suited for cost-sensitive designs where EMI filtering is prioritized over size; less suitable for ultra-compact layouts | Select LM2852YMXAX-2.5 when board space permits larger magnetics and lower EMI is critical; LM2852XMXAX-2.5 preferred for miniaturized systems. |
| TPS62231DRVR | 3MHz switching; 0.6–5.5V adjustable output; 2A rating; smaller 6-pin WSON package; no split-rail support | Requires external feedback resistors; lacks AVIN/PVIN separation; better for single-rail systems with tight space constraints | Choose TPS62231DRVR for designs needing adjustable output or smallest footprint; LM2852XMXAX-2.5 retains advantage in thermal management and noise isolation via split-rail. |
Compared with LM2852YMXAX-2.5 and TPS62231DRVR, LM2852XMXAX-2.5 uniquely balances 1.5MHz density, factory-fixed 2.5V accuracy, and split-rail flexibility-making it optimal for thermally demanding, noise-sensitive 2.5V PoL applications where layout space and reliability are co-prioritized.
Availability
LM2852XMXAX-2.5 is available at Aetrix Electronics and suitable for FPGA core power, portable computing DC-DC conversion, broadband networking PHY supplies, and industrial sensor node regulation requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for LM2852XMXAX-2.5 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 and embedded processing technologies, with decades of expertise in power management ICs.
The LM2852 product line delivers high-frequency synchronous buck regulators for space-constrained, thermally demanding point-of-load applications-designed specifically to simplify power design while maintaining precision, efficiency, and reliability.
FAQ
What is the output voltage tolerance of LM2852XMXAX-2.5 over temperature?
The LM2852XMXAX-2.5 has a factory-programmed 2.5V output with guaranteed tolerance of ±2.25% (2.4437V to 2.5563V) at TJ = 25°C. Over the full operating junction temperature range (–40°C to 125°C), the output remains within this band, verified per TI's electrical characteristics table. This tight tolerance ensures compatibility with 2.5V I/O standards in FPGAs and processors without external trimming.
Can LM2852XMXAX-2.5 operate with different voltages on AVIN and PVIN pins?
Yes, LM2852XMXAX-2.5 supports true split-rail operation: AVIN (Pin 1) powers the control logic, while PVIN (Pins 6,7) supplies the power FETs. AVIN must be ≥ PVIN and both must fall within 2.85–5.5V. This architecture isolates noise-sensitive analog circuits from high-current switching paths-critical for maintaining regulation accuracy in mixed-signal systems using LM2852XMXAX-2.5.
What is the recommended soft-start capacitor value for LM2852XMXAX-2.5?
The LM2852XMXAX-2.5 soft-start capacitor (CSS) connects to Pin 4 and should be between 1nF and 50nF. A 2.7nF ceramic capacitor yields ~3ms startup time, matching TI's reference design. This value ensures controlled inrush current and avoids current-limit triggering during startup-essential for reliable operation in battery-powered devices using LM2852XMXAX-2.5.
Does LM2852XMXAX-2.5 require external compensation components?
No, LM2852XMXAX-2.5 integrates a complete type-three compensation network on-die. This eliminates external compensation components and guarantees stability when used with recommended inductor/capacitor values from TI's datasheet tables. Designers retain full control over loop response via L/C selection-but no op-amps, resistors, or capacitors are needed for compensation in LM2852XMXAX-2.5 applications.
What thermal performance can be expected from LM2852XMXAX-2.5 in a standard PCB layout?
In a standard 2-layer PCB with 1oz copper and the exposed thermal pad soldered to a 1-in² ground plane, LM2852XMXAX-2.5 achieves RθJA = 39.2°C/W. At 2A load and 3.3V input, junction temperature rise is ~78°C above ambient-well below the 125°C max rating. For higher reliability, adding internal ground layers or thermal vias under the pad further improves dissipation in LM2852XMXAX-2.5 deployments.
LM2852XMXAX-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LM2852XMXAX-2.5 FAQ
1.How can I place an order for LM2852XMXAX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXAX-2.5 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 LM2852XMXAX-2.5 reliable?
The price and inventory of LM2852XMXAX-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXAX-2.5 is usually 5 days.
3.What payment methods are accepted for LM2852XMXAX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXAX-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXAX-2.5?
LM2852XMXAX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXAX-2.5 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 LM2852XMXAX-2.5?
For technical support, including LM2852XMXAX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXAX-2.5 requirements.
6.How does Aetrix verify that LM2852XMXAX-2.5 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXAX-2.5 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 LM2852XMXAX-2.5 meets industry standards.
7.What is the process for return or replacement of LM2852XMXAX-2.5?
All LM2852XMXAX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXAX-2.5, 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 LM2852XMXAX-2.5 part is unused and in its original packaging.
Return procedure for LM2852XMXAX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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