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Texas Instruments LM2852YMXA-3.3/NOPB
- Part No.:
- LM2852YMXA-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-3.3/NOPB.pdf
- Description:
- IC REG BUCK 3.3V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:358
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Product details
Overview
LM2852YMXA-3.3/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 3.3V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60-mΩ MOSFETs, and HTSSOP-14 package. It delivers precise point-of-load regulation for FPGA core rails and low-voltage embedded systems requiring high efficiency at light-to-moderate loads.
For engineers reviewing the LM2852YMXA-3.3/NOPB datasheet, LM2852YMXA-3.3/NOPB pinout, LM2852YMXA-3.3/NOPB application, or LM2852YMXA-3.3/NOPB equivalent, key selection criteria include factory-programmed 3.3V output, 500 kHz vs 1.5 MHz variant distinction, soft-start capacitor sizing (2.7 nF typical), thermal performance in exposed-pad HTSSOP, and split-rail AVIN/PVIN operation.
Technical Context
The LM2852YMXA-3.3/NOPB implements voltage-mode control with internal type-three compensation, eliminating external compensation components. Its PWM generator operates at a fixed 500 kHz frequency (Y-version), with duty cycle determined by VOUT/VIN ratio and regulated via an integrated error amplifier referenced to a factory-trimmed DAC.
Split-rail architecture separates AVIN (2.85–5.5 V, logic bias) from PVIN (1.5–5.5 V, power FET supply), enabling optimized input filtering and thermal management. Protection features include UVLO (2.85 V rising threshold), thermal shutdown (165°C), and switch-node monitoring that suppresses switching under no-load conditions until load is applied.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±1.5% (3.226–3.374 V) over –40°C to 125°C junction temperature |
| Max Output Current | 2 A continuous; peak current limit set to 2.25–3.65 A depending on temperature |
| Switching Frequency | 500 kHz (±25% over temperature); enables compact magnetics and predictable EMI profile |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN supports 1.5 V to 5.5 V with AVIN ≥ PVIN constraint |
| Efficiency | Up to 96% at 3.3 VOUT/3.3 VIN, 1 A load; >84% at 0.1 A load confirms low-light-load capability |
| Quiescent Current | 0.85 mA typical (non-switching); 10 µA shutdown current enables battery-sensitive designs |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14); RθJC(bot) = 1.7°C/W enables direct PCB thermal pad conduction |
Pinout & Package
LM2852YMXA-3.3/NOPB uses a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥ PVIN and within 2.85–5.5 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 | Separate from PGND to minimize noise coupling into feedback path |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; sets startup ramp time (e.g., 2.7 nF ≈ 3 ms) |
| PVIN (Pins 6, 7) | Power FET supply | Drives internal high-side and low-side MOSFETs; requires low-ESR bulk capacitance nearby |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate regulation |
| SW (Pins 8, 9) | Switch node | Connects to output inductor; high di/dt node requiring short, wide trace routing |
| PGND (Pins 10, 11) | Power ground return | Low-impedance return path for high-current switching loop; tied to exposed pad |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output | 3.3 V output permanently set at wafer level-no external resistor divider required |
| Integrated power switches | Internal 75 mΩ PFET and 55 mΩ NFET (25°C) reduce BOM count and improve efficiency vs discrete solutions |
| Type-three compensation | On-chip compensation network eliminates need for external RCZ network, simplifying layout and validation |
| Split-rail operation | Independent AVIN and PVIN supplies allow optimization of logic rail stability and power rail transient response |
| Exposed thermal pad | HTSSOP-14 package bottom pad improves thermal resistance by >95% vs non-exposed variants |
Applications
| Point-of-Load Regulation | FPGA Core Power |
|---|---|
Use Scenario: Regulating 3.3 V supply for I/O banks or auxiliary rails in space-constrained industrial controllers. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering stable 3.3 V at up to 2 A with fast transient response. Use Value: Eliminates need for external feedback resistors and compensation components, reducing solution size by >30% vs controller-based designs. | Use Scenario: Providing clean, tightly regulated 3.3 V to FPGA configuration and communication interfaces. IC Role / Device Role / Timing Role: Local power source with low output ripple (<10 mVpp) and <1% load regulation ensures reliable JTAG and PCIe link initialization. Use Value: Internal soft-start prevents inrush current during FPGA configuration, avoiding brownout on shared system rails. |
| Portable Computing | Broadband Infrastructure |
Use Scenario: Powering USB 3.0 PHY, display interface, or audio codec in battery-powered tablets. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from single-cell Li-ion (3.0–4.2 V) to deliver 3.3 V at variable load. Use Value: 10 µA shutdown current extends battery life during suspend mode; 96% peak efficiency minimizes thermal load in sealed enclosures. | Use Scenario: Supplying 3.3 V to Ethernet PHYs, SFP+ modules, or packet processing ASICs in access switches. IC Role / Device Role / Timing Role: Secondary regulator fed from 5 V intermediate bus, supporting hot-swap and remote management functions. Use Value: Thermal shutdown (165°C) and UVLO protection ensure robust operation in unventilated telecom chassis environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXA-3.3/NOPB | Same 3.3 V output but 1.5 MHz switching frequency; higher switching losses at heavy loads; smaller inductor/capacitor requirements | Better suited for ultra-compact layouts where board area is constrained more than thermal budget | Select LM2852XMXA-3.3/NOPB only when 1.5 MHz operation is required; LM2852YMXA-3.3/NOPB preferred for thermal-limited or efficiency-critical designs |
| TPS62231DRVR | 3.3 V fixed output, 3 MHz switching, 0.6–5.5 V input, 0.6 A max output; smaller 6-pin WSON package; no split-rail support | Targeted at low-power microcontrollers and sensors-not suitable for 2 A FPGA or ASIC loads | Use TPS62231DRVR only for sub-1 A applications where footprint and cost outweigh current capability needs |
Compared with LM2852XMXA-3.3/NOPB and TPS62231DRVR, LM2852YMXA-3.3/NOPB uniquely balances 2 A capability, 500 kHz efficiency optimization, and split-rail flexibility-making it the only option among the three qualified for thermally demanding, medium-current point-of-load applications.
Availability
LM2852YMXA-3.3/NOPB is available at Aetrix Electronics and suitable for FPGA core power, portable computing subsystems, and broadband infrastructure equipment requiring stable component supply across extended production cycles.
Supply support for LM2852YMXA-3.3/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- and efficiency-constrained point-of-load applications, emphasizing simplified design, factory-set outputs, and robust thermal performance in exposed-pad packages.
FAQ
What is the output voltage tolerance of the LM2852YMXA-3.3/NOPB?
The LM2852YMXA-3.3/NOPB has a factory-programmed output voltage of 3.3 V with a tolerance of ±1.5%, specified as 3.2257 V to 3.3743 V over the full junction temperature range (–40°C to 125°C). This tight tolerance is achieved through laser trimming during wafer test and does not require external feedback components.
Does the LM2852YMXA-3.3/NOPB support split-rail operation?
Yes, the LM2852YMXA-3.3/NOPB supports split-rail operation: AVIN powers the control logic (2.85–5.5 V), while PVIN supplies the power FETs (1.5–5.5 V). AVIN must always be ≥ PVIN. This allows independent optimization of logic rail stability and power rail transient response in the LM2852YMXA-3.3/NOPB design.
What soft-start capacitor value is recommended for the LM2852YMXA-3.3/NOPB?
A 2.7 nF ceramic capacitor is the standard recommendation for the LM2852YMXA-3.3/NOPB soft-start pin (SS), yielding approximately 3 ms startup time. The LM2852YMXA-3.3/NOPB supports soft-start capacitors from 1 nF to 50 nF; values outside this range may cause unstable startup or fault recovery behavior.
How does thermal management work in the LM2852YMXA-3.3/NOPB package?
The LM2852YMXA-3.3/NOPB uses an HTSSOP-14 package with an exposed thermal pad that must be soldered to a PCB ground plane. Its junction-to-board thermal resistance (RθJB) is 20.1°C/W, and junction-to-case (bottom) resistance is only 1.7°C/W-enabling efficient heat transfer directly into the PCB copper. Thermal shutdown activates at 165°C with 10°C hysteresis.
Can the LM2852YMXA-3.3/NOPB operate with input voltage below 2.85 V?
No-the LM2852YMXA-3.3/NOPB UVLO threshold is 2.85 V (rising) on AVIN. If AVIN drops below this level, the device shuts down. PVIN may operate as low as 1.5 V, but AVIN must remain ≥2.85 V for functional operation. Attempting to operate the LM2852YMXA-3.3/NOPB below this threshold risks unregulated output or latch-up.
LM2852YMXA-3.3/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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2852YMXA-3.3/NOPB FAQ
1.How can I place an order for LM2852YMXA-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-3.3/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 LM2852YMXA-3.3/NOPB reliable?
The price and inventory of LM2852YMXA-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-3.3/NOPB?
LM2852YMXA-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-3.3/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 LM2852YMXA-3.3/NOPB?
For technical support, including LM2852YMXA-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-3.3/NOPB requirements.
6.How does Aetrix verify that LM2852YMXA-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-3.3/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 LM2852YMXA-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-3.3/NOPB?
All LM2852YMXA-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-3.3/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 LM2852YMXA-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXA-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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