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Texas Instruments LM2852XMXAX-3.3
- Part No.:
- LM2852XMXAX-3.3
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXAX-3.3.pdf
- Description:
- IC REG BUCK 3.3V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,834
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Product details
Overview
LM2852XMXAX-3.3 from Texas Instruments is a 2A synchronous buck regulator with fixed 3.3V output, 1.5MHz switching frequency, internal 60mΩ MOSFETs, voltage-mode control, and factory-programmed EEPROM output setting. It operates from 2.85V to 5.5V input and delivers stable power for FPGA core rails and portable computing point-of-load applications.
For engineers reviewing the LM2852XMXAX-3.3 datasheet, LM2852XMXAX-3.3 pinout, LM2852XMXAX-3.3 application, or LM2852XMXAX-3.3 equivalent, key selection criteria include its 1.5MHz high-frequency operation enabling compact 1µH inductors, integrated type-three compensation eliminating external loop components, and HTSSOP-14 exposed-pad thermal design for 2A continuous load capability.
Technical Context
The LM2852XMXAX-3.3 implements voltage-mode PWM control with an internal oscillator set to 1500kHz (±25% over temperature), supporting ceramic output capacitors down to 10µF due to its optimized 1.5MHz architecture. Its internal type-three compensation network eliminates external compensation components while maintaining stability across recommended L–C–ESR ranges.
It integrates dual 60mΩ (typ) MOSFETs - a PFET high-side switch and NFET low-side switch - with current-limit threshold of 4A (typ), soft-start controlled by external capacitor on SS pin (1–50nF range), and UVLO with 85mV hysteresis referenced to AVIN. The device uses separate AVIN (logic bias) and PVIN (power FET supply) rails for flexible split-rail operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.2% (3.2257V to 3.3743V) at TJ = −40°C to +125°C; factory EEPROM-programmed, no external resistors required. |
| Switching Frequency | 1500kHz (typ); enables use of 1µH inductors and small ceramic output capacitors (e.g., 10µF), reducing solution footprint vs. 500kHz variants. |
| Max Output Current | 2A continuous; supported by internal 75mΩ (PFET) / 55mΩ (NFET) MOSFETs with thermal shutdown at 165°C and 10°C hysteresis. |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN must be ≤ AVIN and ≥1.5V; supports single-rail (AVIN = PVIN) or split-rail configurations. |
| Quiescent Current | 2mA (typ) in active operation; 10µA (typ) in shutdown (EN = 0V); enables low-power standby modes in battery-powered systems. |
| Line/Load Regulation | 0.6% max line regulation (3.5V–5.5V AVIN); 8mV/A max load regulation; ensures tight output stability under dynamic load transients. |
Pinout & Package
LM2852XMXAX-3.3 is housed in a thermally enhanced 14-pin HTSSOP package (PWP0014A) with exposed die attach pad soldered to PCB ground for optimal thermal dissipation (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥2.85V; can be tied to PVIN or separate low-noise rail. |
| EN (2) | Enable control | Internally pulled up; connect to GND to disable; logic-high threshold is 75% of AVIN voltage. |
| SGND (3) | Signal ground reference | Reference for error amplifier and internal circuits; must be connected to clean analog ground plane. |
| SS (4) | Soft-start timing | Connects to external capacitor (1–50nF); sets startup ramp time; internal 400kΩ resistor charges CSS. |
| NC (5,12,13) | No-connect | Not internally bonded; may be left floating or tied to GND per layout best practices. |
| PVIN (6,7) | Main power input | Supplies internal PFET source; handles high di/dt; requires low-ESR input capacitor placed adjacent to pins. |
| SW (8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and minimal loop area for EMI control. |
| PGND (10,11) | Power ground return | Return path for high-current switching; must connect to large copper pour or internal ground plane. |
| SNS (14) | Output voltage sense | High-impedance feedback input; connect directly to load via Kelvin sense trace for accurate regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates need for external compensation network, reducing BOM count and layout sensitivity while ensuring stability with recommended L/C/ESR ranges. |
| 1.5MHz Switching Frequency | Enables use of sub-2µH inductors and <22µF ceramic output capacitors, cutting solution size by >40% vs. 500kHz buck regulators. |
| Internal 60mΩ MOSFETs | Reduces conduction losses and eliminates external power switches; supports 2A continuous output without heatsinking in typical layouts. |
| Split-Rail AVIN/PVIN Operation | Allows independent optimization of logic supply (AVIN) and power stage supply (PVIN), improving efficiency in multi-rail systems. |
| Factory-Programmed Output | 3.3V output permanently stored in EEPROM; no external resistive divider needed, ensuring accuracy and eliminating calibration drift. |
Applications
| FPGA Core Power Supply | Portable Computing Point-of-Load |
|---|---|
Use Scenario: Regulating 3.3V supply for Xilinx Spartan-6 FPGA I/O banks with dynamic current draw up to 1.8A. IC Role / Device Role / Timing Role: Primary DC-DC step-down converter delivering tightly regulated 3.3V from 5V system rail. Use Value: 1.5MHz operation minimizes inductor size (1µH) and enables fast transient response to FPGA I/O switching noise. |
Use Scenario: Powering USB 3.0 controller and display interface in tablet design with strict board space constraints. IC Role / Device Role / Timing Role: Compact, high-efficiency buck regulator replacing discrete solutions in space-constrained mobile PCBs. Use Value: HTSSOP-14 exposed pad achieves 38°C/W θJA, sustaining 2A load at ambient ≤60°C without airflow. |
| Broadband Networking PHY Power | Industrial Sensor Node MCU Supply |
Use Scenario: Providing 3.3V rail for Ethernet PHY ICs (e.g., DP83848) in enterprise switch line cards with 100ms startup requirement. IC Role / Device Role / Timing Role: Main power stage with programmable soft-start (via 2.7nF CSS) meeting IEEE 802.3af timing compliance. Use Value: Internal UVLO (2.85V min) and thermal shutdown (165°C) ensure robust operation during hot-swap events. |
Use Scenario: Supplying ultra-low-quiescent microcontroller (e.g., MSP430FR5969) in battery-operated environmental sensor nodes. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in pulse-skipping mode at light loads. Use Value: 10µA shutdown current extends battery life; 2mA operating IQ maintains regulation during periodic wake-up cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXAX-3.3 | 500kHz switching frequency; requires larger 10–15µH inductor and ≥100µF output capacitance. | Better suited for cost-sensitive designs where EMI filtering is prioritized over size; lower switching loss at light loads. | Select when board space allows larger magnetics and lower-frequency EMI compliance is required. |
| TPS62231DRYT | 3MHz fixed-frequency sync buck; 0.6V–5.5V adjustable output; 2.05A max; smaller 2mm × 2mm WSON package. | Requires external feedback resistors; lacks factory-programmed 3.3V option; higher IQ (17µA shutdown). | Choose for ultra-compact footprints where adjustable output and higher frequency outweigh EEPROM convenience. |
Compared with LM2852YMXAX-3.3, the LM2852XMXAX-3.3 reduces inductor volume by 90% and output capacitance by 90%, while TPS62231DRYT offers smaller package but adds BOM complexity and lacks pin-compatible 3.3V factory setting.
Availability
LM2852XMXAX-3.3 is available at Aetrix Electronics and suitable for FPGA core power, portable computing point-of-load, and broadband networking PHY applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.
Supply support for LM2852XMXAX-3.3 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, serving industrial, automotive, and communications markets.
The LM2852XMXAX-3.3 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed for high-efficiency, low-component-count DC-DC conversion in space-constrained and thermally demanding applications.
FAQ
What is the switching frequency of the LM2852XMXAX-3.3?
The LM2852XMXAX-3.3 operates at a nominal switching frequency of 1500kHz, with guaranteed range of 1050kHz to 1825kHz across temperature and input voltage. This high-frequency operation enables use of miniature 1µH inductors and low-ESR ceramic capacitors, significantly reducing solution size compared to 500kHz alternatives like the LM2852YMXAX-3.3.
Does the LM2852XMXAX-3.3 require external compensation components?
No, the LM2852XMXAX-3.3 integrates a complete type-three compensation network on-die, eliminating the need for external resistors or capacitors in the feedback loop. This simplifies design, improves reliability, and ensures stability when used with inductors and capacitors within the manufacturer-specified ranges (e.g., 1–10µH inductors and 10–100µF ceramic outputs for the 1.5MHz version).
What is the maximum continuous output current rating for the LM2852XMXAX-3.3?
The LM2852XMXAX-3.3 is rated for 2A continuous output current under standard thermal conditions (θJA = 38°C/W, TA = 25°C). Its internal 75mΩ (PFET) and 55mΩ (NFET) MOSFETs, combined with the exposed-pad HTSSOP package, enable this current level without external heatsinking in properly laid-out PCBs with adequate copper area.
Can the LM2852XMXAX-3.3 operate with separate AVIN and PVIN supplies?
Yes, the LM2852XMXAX-3.3 supports split-rail operation: AVIN powers the control logic (2.85V–5.5V), while PVIN supplies the power FETs (1.5V–5.5V). PVIN must not exceed AVIN. This allows optimizing noise isolation-e.g., using a clean LDO for AVIN and a bulk-switcher rail for PVIN-without compromising regulation accuracy or efficiency.
Is the 3.3V output of the LM2852XMXAX-3.3 factory-programmed or resistor-set?
The 3.3V output of the LM2852XMXAX-3.3 is factory-programmed into internal EEPROM and cannot be adjusted externally. This eliminates the need for precision feedback resistors, removes resistor tolerance errors, prevents drift over temperature/time, and guarantees ±2.2% output accuracy across −40°C to +125°C junction temperature range.
LM2852XMXAX-3.3 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):
- 3.3V
- 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-3.3 FAQ
1.How can I place an order for LM2852XMXAX-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXAX-3.3 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-3.3 reliable?
The price and inventory of LM2852XMXAX-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXAX-3.3 is usually 5 days.
3.What payment methods are accepted for LM2852XMXAX-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXAX-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXAX-3.3?
LM2852XMXAX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXAX-3.3 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-3.3?
For technical support, including LM2852XMXAX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXAX-3.3 requirements.
6.How does Aetrix verify that LM2852XMXAX-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXAX-3.3 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-3.3 meets industry standards.
7.What is the process for return or replacement of LM2852XMXAX-3.3?
All LM2852XMXAX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXAX-3.3, 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-3.3 part is unused and in its original packaging.
Return procedure for LM2852XMXAX-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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