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Texas Instruments LM2852XMXAX-1.8/NOPB
- Part No.:
- LM2852XMXAX-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXAX-1.8/NOPB.pdf
- Description:
- IC REG BUCK 1.8V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,739
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Product details
Overview
LM2852XMXAX-1.8/NOPB from Texas Instruments is a 2A synchronous buck DC-DC regulator with fixed 1.8 V output, 1.5 MHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ power MOSFETs, and voltage-mode control architecture-designed for FPGA core rail regulation in space-constrained portable computing systems.
For engineers reviewing the LM2852XMXAX-1.8/NOPB datasheet, LM2852XMXAX-1.8/NOPB pinout, LM2852XMXAX-1.8/NOPB application, or LM2852XMXAX-1.8/NOPB equivalent, key selection criteria include its 1.5 MHz operation enabling compact LC filtering, factory-programmed 1.8 V output with ±2.025% tolerance at 25°C, thermal shutdown at 165°C, and HTSSOP-14 exposed-pad package for enhanced power dissipation.
Technical Context
The LM2852XMXAX-1.8/NOPB implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), allowing independent optimization of control and power paths while enforcing PVIN ≤ AVIN.
Switch node protection logic disables switching under no-load or light-load conditions until output loading triggers normal regulation-preventing unintended shoot-through while maintaining stable 1.8 V output across –40°C to 125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.025% (TJ = 25°C); ensures precise core voltage for low-voltage ASIC/FPGA logic |
| Max Output Current | 2 A continuous; supports high-current digital loads without external current-sense resistors |
| Switching Frequency | 1.5 MHz (±25% over temp); enables use of sub-2.2 µH inductors and ceramic output capacitors |
| Input Voltage Range | 2.85 V to 5.5 V; compatible with single-cell Li-ion, 3.3 V, and 5 V system rails |
| Quiescent Current | 0.85 mA (non-switching, TJ = 25°C); minimizes standby power in always-on subsystems |
| Shutdown Current | 10 µA (EN = 0 V, TJ = 25°C); enables ultra-low-power system-level sleep modes |
| Thermal Shutdown | 165°C with 10°C hysteresis; protects against sustained overload or poor PCB thermal design |
Pinout & Package
LM2852XMXAX-1.8/NOPB uses a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground plane for optimal heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Powers internal logic; must be ≥ PVIN and within 2.85–5.5 V range |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; floating or AVIN-connected enables operation |
| SGND (Pin 3) | Signal ground reference | Provides low-noise return for error amplifier and feedback network |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor to control output ramp rate and prevent inrush current |
| NC (Pins 5, 12, 13) | No connect | Must be left floating or tied to GND; no internal connection |
| PVIN (Pins 6, 7) | Main power input | Supplies internal PFET/NFET switches; connects directly to input bulk capacitor |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; route directly to load for accurate remote sensing |
| PGND (Pins 10, 11) | Power ground return | Carries high-frequency switch currents; connect to dedicated ground plane under exposed pad |
| SW (Pins 8, 9) | Switch node | Drives external inductor; requires short, wide trace to minimize EMI and conduction loss |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60 mΩ PFET/NFET | Eliminates external power switches and reduces BOM count while delivering >90% efficiency at 1 A load |
| Internal type-three compensation | Removes need for external compensation network-simplifies layout and improves stability across recommended LC ranges |
| Split-rail AVIN/PVIN operation | Enables independent optimization of logic supply (e.g., 3.3 V) and power rail (e.g., 5 V), reducing noise coupling into control circuitry |
| Switch node protection logic | Prevents abnormal switching during startup or no-load conditions, avoiding false triggering of current limit or shoot-through |
| Exposed thermal pad (HTSSOP-14) | Reduces RθJA to 39.2°C/W, supporting 2 A operation in ambient temperatures up to 85°C with minimal copper area |
Applications
| FPGA Core Power Supply | ASIC Local Point-of-Load Regulation |
|---|---|
Use Scenario: Providing tightly regulated 1.8 V to Xilinx Artix-7 or Intel Cyclone V FPGA core logic under dynamic load transients. IC Role / Device Role / Timing Role: Primary DC-DC converter generating core voltage with fast transient response and <1% output deviation. Use Value: Enables reliable FPGA configuration and operation at 1.8 V with 2 A peak current support and 1.5 MHz switching for compact filter design. | Use Scenario: Delivering stable 1.8 V to ARM-based SoC application processors in industrial gateways with limited board space. IC Role / Device Role / Timing Role: Standalone synchronous buck regulator managing processor core rail independently from I/O or memory supplies. Use Value: Reduces solution size by 40% vs. 500 kHz alternatives due to smaller inductor (1 µH) and ceramic output capacitor (10 µF). |
| Portable Computing Power Management | Broadband Communications Infrastructure |
Use Scenario: Powering DDR3L memory interfaces and CPU cores in thin-and-light notebooks operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: High-efficiency step-down regulator converting 3.3 V system rail to 1.8 V memory interface voltage. Use Value: Achieves >92% efficiency at 1.5 A load with 3.3 V input, extending battery runtime while maintaining thermal safety margin. | Use Scenario: Generating 1.8 V supply for Ethernet PHYs and packet processing ASICs in small-form-factor switches and routers. IC Role / Device Role / Timing Role: Robust, thermally efficient local regulator meeting -40°C to 85°C industrial temperature requirements. Use Value: Delivers stable 1.8 V output with <10 mV load regulation across 0–2 A, ensuring signal integrity in high-speed serial links. |
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-1.8/NOPB | 500 kHz switching frequency; requires larger 10–15 µH inductor and higher-CESR output capacitors | Better suited for cost-sensitive designs where EMI filtering is less critical and board space is less constrained | Select when lower switching losses and reduced EMI priority outweigh size constraints |
| TPS62231DRVR | 3 MHz operation; 1.8 V fixed output; 0.65 A max current; smaller 6-pin WSON package | Limited to sub-1 A loads; not suitable for 2 A FPGA core applications requiring LM2852XMXAX-1.8/NOPB's full current capability | Choose only for low-power microcontroller or sensor rails-not as direct replacement for 2 A loads |
Compared with LM2852YMXA-1.8/NOPB, LM2852XMXAX-1.8/NOPB trades slightly higher switching losses for significantly smaller passive components; versus TPS62231DRVR, it delivers triple the output current in a thermally optimized HTSSOP package-making it the only viable alternative for 2 A, 1.8 V point-of-load applications demanding industrial temperature range and robust fault protection.
Availability
LM2852XMXAX-1.8/NOPB is available at Aetrix Electronics and suitable for FPGA core power, ASIC point-of-load regulation, and portable computing power management requiring stable component supply and long-term industrial lifecycle support.
Supply support for LM2852XMXAX-1.8/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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and communications markets.
The LM2852 product line delivers highly integrated synchronous buck regulators targeting space-constrained, high-efficiency point-of-load applications-specifically engineered for FPGA, ASIC, and processor core voltage regulation with factory-set outputs and simplified design-in.
FAQ
What is the switching frequency of the LM2852XMXAX-1.8/NOPB?
The LM2852XMXAX-1.8/NOPB operates at a nominal switching frequency of 1.5 MHz, with typical variation between 1050 kHz and 1825 kHz across –40°C to 125°C junction temperature. This high-frequency operation allows use of small-value inductors (e.g., 1 µH) and low-ESR ceramic output capacitors, reducing overall solution footprint compared to 500 kHz alternatives like the LM2852YMXA-1.8/NOPB.
Does the LM2852XMXAX-1.8/NOPB require external compensation components?
No, the LM2852XMXAX-1.8/NOPB integrates a complete type-three compensation network internally. This eliminates the need for external resistors and capacitors in the feedback loop, simplifying design, improving stability across recommended LC values, and reducing bill-of-materials count-provided the selected inductor (1–22 µH) and output capacitor (10–220 µF) fall within TI's validated ranges per the datasheet.
What is the maximum output current capability of the LM2852XMXAX-1.8/NOPB?
The LM2852XMXAX-1.8/NOPB delivers up to 2 A of continuous output current under recommended operating conditions (PVIN = 3.3 V to 5.5 V, TJ ≤ 125°C, proper PCB thermal design). Its internal 60 mΩ PFET and NFET switches, combined with the HTSSOP-14 exposed-pad package, enable this current level without external MOSFETs or current-sense resistors-making it suitable for FPGA core and high-performance ASIC power rails.
How does the split-rail AVIN/PVIN architecture benefit the LM2852XMXAX-1.8/NOPB?
The LM2852XMXAX-1.8/NOPB's split-rail design separates AVIN (logic bias supply) from PVIN (power FET supply), allowing independent optimization: AVIN can be a clean 3.3 V rail for noise-sensitive control circuitry, while PVIN may be a higher-current 5 V source for the power stage. This isolation reduces coupling of switching noise into the error amplifier and reference, improving regulation accuracy and transient response-especially critical for 1.8 V core supplies.
Can the LM2852XMXAX-1.8/NOPB be used with ceramic output capacitors?
Yes, the LM2852XMXAX-1.8/NOPB is specifically optimized for ceramic output capacitors in its 1.5 MHz configuration. The datasheet recommends 10 µF ceramic capacitors (e.g., Murata GRM32DR61E106K) for 1.8 V output, leveraging their low ESR (<10 mΩ) to maintain loop stability and achieve >90% efficiency. Unlike the 500 kHz LM2852Y variant, the LM2852X does not require high-ESR tantalum or niobium oxide capacitors.
LM2852XMXAX-1.8/NOPB 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:
- 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):
- 1.8V
- 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-1.8/NOPB FAQ
1.How can I place an order for LM2852XMXAX-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXAX-1.8/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 LM2852XMXAX-1.8/NOPB reliable?
The price and inventory of LM2852XMXAX-1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXAX-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852XMXAX-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXAX-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXAX-1.8/NOPB?
LM2852XMXAX-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXAX-1.8/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 LM2852XMXAX-1.8/NOPB?
For technical support, including LM2852XMXAX-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXAX-1.8/NOPB requirements.
6.How does Aetrix verify that LM2852XMXAX-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852XMXAX-1.8/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 LM2852XMXAX-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852XMXAX-1.8/NOPB?
All LM2852XMXAX-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXAX-1.8/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 LM2852XMXAX-1.8/NOPB part is unused and in its original packaging.
Return procedure for LM2852XMXAX-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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