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Texas Instruments LM2852XMXA-1.8
- Part No.:
- LM2852XMXA-1.8
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-1.8.pdf
- Description:
- IC REG BUCK 1.8V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,571
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Product details
Overview
LM2852XMXA-1.8 from Texas Instruments is a 2A synchronous buck DC-DC regulator with fixed 1.8V output, 1.5MHz switching frequency, 2.85–5.5V input range, internal 60mΩ MOSFETs, and voltage-mode control in HTSSOP-14 package-designed for point-of-load regulation in FPGA core supplies.
For engineers reviewing the LM2852XMXA-1.8 datasheet, LM2852XMXA-1.8 pinout, LM2852XMXA-1.8 application, or LM2852XMXA-1.8 equivalent, key selection criteria include its 1.5MHz operation enabling compact filter design, factory-set 1.8V output tolerance (±2.25%), soft-start capacitor programmability (1–50nF), and thermal shutdown at 165°C with 10°C hysteresis.
Technical Context
The LM2852XMXA-1.8 implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its 1.5MHz oscillator enables use of small-value inductors (e.g., 1µH) and ceramic output capacitors (e.g., 10µF), targeting high-density PCB layouts.
It features dual internal power MOSFETs (75mΩ PFET / 55mΩ NFET typical at 25°C), dedicated AVIN bias rail, separate PVIN power rail, and SNS pin for remote output voltage sensing-supporting stable regulation under dynamic load transients up to 2A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.25% (1.7595V to 1.8405V) over –40°C to +125°C junction temperature |
| Switching Frequency | 1500kHz ±21.7% (1050–1825kHz), enabling compact 1µH inductor and low-ESR ceramic capacitor designs |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range but must be ≤ AVIN for split-rail operation |
| Max Load Current | 2A continuous output current with thermal shutdown activation at 165°C junction temperature |
| Quiescent Current | 0.85–2mA during normal operation; 10–25µA in shutdown (EN = 0V) |
| Peak Current Limit | 2.75–4.95A threshold ensures robust short-circuit protection without false triggering under transient loads |
| Line Regulation | 0.2–0.6% over full AVIN range, minimizing output variation when input supply fluctuates |
Pinout & Package
LM2852XMXA-1.8 is housed in a thermally enhanced 14-pin HTSSOP package (PWP0014A) with exposed die attach pad soldered to PCB ground for improved thermal dissipation (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥ PVIN and within 2.85–5.5V |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for high, 25% for low |
| SGND (3) | Signal ground reference | Reference for error amplifier and internal circuitry; separate from PGND to reduce noise coupling |
| SS (4) | Soft-start timing | Connects to 1–50nF capacitor to control output ramp time; internal 400kΩ resistor sets RC time constant |
| NC (5,12,13) | No-connect | Must be left floating or tied to GND; no internal connection |
| PVIN (6,7) | Main power input | Supplies internal PFET source; connects directly to input bulk capacitor |
| SW (8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace routing |
| PGND (10,11) | Power ground return | High-current return path for internal NFET and inductor; connect to large copper plane |
| SNS (14) | Output voltage sense | Remote feedback input; connect directly to load for accurate regulation, minimizing IR drop |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.8V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity while ensuring ±2.25% accuracy across temperature |
| Integrated type-three compensation | Enables stable loop response with recommended L/C values only-no external compensation network required |
| 1.5MHz fixed-frequency operation | Supports 1µH inductors and 10µF ceramic output capacitors, cutting solution size by >40% vs. 500kHz variants |
| Dual internal 60mΩ MOSFETs | Reduces conduction losses and eliminates gate-drive complexity; PFET/NFET RDS(on) specified over full temperature range |
| Separate AVIN and PVIN rails | Allows optimized biasing (e.g., 3.3V AVIN) while supporting higher PVIN (e.g., 5V), improving efficiency in mixed-voltage systems |
Applications
| FPGA Core Power Supply | ASIC Local Regulation |
|---|---|
Use Scenario: Delivering clean, tightly regulated 1.8V to Xilinx Artix-7 FPGA core banks with dynamic current demand up to 2A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing point-of-load conversion from 3.3V/5V system rail. Use Value: 1.5MHz switching enables <10mm² total solution size with 1µH inductor and 10µF ceramic capacitor, meeting FPGA transient response requirements. | Use Scenario: Powering ARM Cortex-A9 processor cores in industrial gateway SoCs with strict 1.8V ±3% tolerance. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter operating in voltage-mode control with remote sensing for load-point accuracy. Use Value: Factory-trimmed 1.8V output and ±2.25% tolerance ensure compliance with core voltage spec without calibration or trimming. |
| Portable Computing Subsystem | Broadband Networking PHY |
Use Scenario: Supplying 1.8V I/O voltage to DDR3L memory interfaces in fanless edge compute modules. IC Role / Device Role / Timing Role: High-efficiency buck regulator with low quiescent current (0.85mA) to extend battery runtime during light-load states. Use Value: 10µA shutdown current and internal soft-start prevent inrush current during wake-from-sleep transitions. | Use Scenario: Generating 1.8V supply for Ethernet PHY ICs (e.g., DP83867) in 1U rack-mounted switches. IC Role / Device Role / Timing Role: Thermally robust regulator with exposed-pad HTSSOP package and 165°C thermal shutdown. Use Value: 38°C/W θJA and dual PGND pins enable reliable 2A operation in confined 85°C ambient environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXA-1.8 | Same pinout and 1.8V output, but 500kHz switching frequency and different internal oscillator | Requires larger 10–15µH inductor and 100µF tantalum/ceramic output capacitor | Select for lower EMI-sensitive applications where board space is less constrained |
| TPS62231DRYT | 1.8V fixed output, 3MHz switching, 2A rating, but uses current-mode control and different pinout | Not pin-compatible; requires redesign of feedback, soft-start, and power routing | Select when ultra-compact size (<5mm²) and faster transient response are prioritized over direct replacement |
Compared with LM2852YMXA-1.8 and TPS62231DRYT, the LM2852XMXA-1.8 delivers optimal balance of compact 1.5MHz design, factory-trimmed accuracy, and proven thermal performance in HTSSOP-14-making it ideal for space-constrained, thermally demanding FPGA/ASIC core supplies.
Availability
LM2852XMXA-1.8 is available at Aetrix Electronics and suitable for FPGA core power, ASIC local regulation, and broadband networking PHY applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support (–40°C to +125°C).
Supply support for LM2852XMXA-1.8 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The LM2852XMXA-1.8 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for minimal external component count, fast time-to-market power designs, and robust operation in high-density embedded systems.
FAQ
What is the switching frequency of the LM2852XMXA-1.8?
The LM2852XMXA-1.8 operates at a fixed 1500kHz switching frequency, with guaranteed range of 1050–1825kHz over temperature and input voltage. This high-frequency capability allows use of small 1µH inductors and low-ESR ceramic capacitors, significantly reducing solution footprint compared to 500kHz alternatives like the LM2852YMXA-1.8.
Does the LM2852XMXA-1.8 require external compensation components?
No, the LM2852XMXA-1.8 integrates a complete type-three compensation network internally. This eliminates the need for external resistors or capacitors in the feedback loop, simplifying design and improving reliability-provided the recommended output inductor (1µH) and capacitor (10µF ceramic) values from the datasheet are used.
What is the maximum continuous output current for the LM2852XMXA-1.8?
The LM2852XMXA-1.8 delivers up to 2A continuous output current under proper thermal conditions. Its thermal shutdown activates at 165°C junction temperature with 10°C hysteresis, and the exposed-pad HTSSOP-14 package achieves 38°C/W junction-to-ambient thermal resistance when properly soldered to a 1-in² copper area.
How is the 1.8V output voltage set on the LM2852XMXA-1.8?
The 1.8V output is factory-programmed into the LM2852XMXA-1.8 via internal DAC and resistor divider-no external feedback resistors are required. The output voltage is trimmed to 1.8V ±2.25% (1.7595V to 1.8405V) across –40°C to +125°C, verified during production test and documented in the Electrical Characteristics table.
Can the LM2852XMXA-1.8 operate with separate AVIN and PVIN supplies?
Yes, the LM2852XMXA-1.8 supports split-rail operation: AVIN powers the control logic (2.85–5.5V), while PVIN supplies the power FETs (same range, but must be ≤ AVIN). This allows optimization-for example, using 3.3V AVIN for low-noise biasing while running PVIN at 5V for higher efficiency in step-down conversion.
LM2852XMXA-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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):
- 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
LM2852XMXA-1.8 FAQ
1.How can I place an order for LM2852XMXA-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-1.8 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-1.8 reliable?
The price and inventory of LM2852XMXA-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXA-1.8 is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-1.8?
LM2852XMXA-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-1.8 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-1.8?
For technical support, including LM2852XMXA-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-1.8 requirements.
6.How does Aetrix verify that LM2852XMXA-1.8 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-1.8?
All LM2852XMXA-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for LM2852XMXA-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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