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Texas Instruments LM2852XMXA-3.3
- Part No.:
- LM2852XMXA-3.3
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-3.3.pdf
- Description:
- IC REG BUCK 3.3V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,953
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Product details
Overview
LM2852XMXA-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, portable computing point-of-load, and broadband infrastructure DC-DC conversion.
For engineers reviewing the LM2852XMXA-3.3 datasheet, LM2852XMXA-3.3 pinout, LM2852XMXA-3.3 application, or LM2852XMXA-3.3 equivalent, key selection criteria include its 1.5MHz high-frequency operation enabling compact filter design, integrated type-three compensation eliminating external compensation components, and HTSSOP-14 exposed-pad thermal performance for sustained 2A load delivery.
Technical Context
The LM2852XMXA-3.3 implements voltage-mode PWM control with an internal oscillator fixed at 1500kHz and integrated type-three compensation network. Its architecture integrates dual MOSFET power switches (75mΩ PFET / 55mΩ NFET) and a precision DAC-based reference set to 3.3V ±1.2% over −40°C to +125°C junction temperature.
It features soft-start via external capacitor (1–50nF range), UVLO with 2.85V turn-on threshold and 85mV hysteresis, and thermal shutdown at 165°C with 10°C hysteresis. The device supports split-rail operation with independent AVIN (logic bias) and PVIN (power switch supply) inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.2% (factory EEPROM-set; no external feedback required) |
| Max Output Current | 2A continuous; peak current limit 2.75–4.95A ensures robust overload handling |
| Switching Frequency | 1500kHz ±22%; enables use of small ceramic output capacitors (e.g., 10µF) and low-inductance inductors (e.g., 1µH) |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range but must be ≤ AVIN for split-rail use |
| Quiescent Current | 0.85–2mA during regulation; 10–25µA in shutdown (EN = 0V) |
| Thermal Resistance | θJA = 38°C/W; exposed-pad HTSSOP-14 package enables >1.5W dissipation at 2A load |
| Protection Features | UVLO, thermal shutdown (165°C, 10°C hysteresis), and switch-node overvoltage protection |
Pinout & Package
LM2852XMXA-3.3 is housed in a 14-pin HTSSOP package (PWP0014A) with exposed thermal pad. The package provides low thermal resistance (38°C/W) and supports reflow soldering per JEDEC Level-1 standards (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; connect to input rail or dedicated low-noise 3.3–5.5V source |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; floating or AVIN-connected enables operation |
| SGND (3) | Signal ground reference | Reference for error amplifier and internal circuitry; separate from PGND for noise isolation |
| SS (4) | Soft-start timing node | Connect 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; high-current path requiring low-impedance PCB trace and local 47µF ceramic CIN |
| SNS (14) | Output voltage sense | Connect directly to load VOUT point to compensate for IR drop; enables accurate remote sensing |
| SW (8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and EMI-aware layout |
| PGND (10,11) | Power ground return | High-current return path for PFET/NFET; connect to solid internal ground plane under exposed pad |
| Exposed Pad | Thermal & electrical ground | Mandatory connection to system GND for thermal performance and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network; reduces BOM count and layout sensitivity for stable loop response |
| Factory-Programmed 3.3V Output | EEPROM-set reference removes need for external resistor divider; guarantees ±1.2% accuracy across temperature |
| 1.5MHz Switching Frequency | Enables ultra-compact output filter: 1µH inductor + 10µF ceramic capacitor typical for 3.3V/2A designs |
| Low Standby Current (10µA) | Minimizes battery drain in always-on systems; supports efficient power sequencing in multi-rail applications |
| Internal 60mΩ MOSFETs | Reduces conduction loss and eliminates external FET drivers; achieves >90% efficiency at 1A load with 3.3VIN/3.3VOUT |
Applications
| FPGA Core Power Supply | Portable Computing Point-of-Load |
|---|---|
|
Use Scenario: Delivering clean, regulated 3.3V to FPGA I/O banks or auxiliary logic in battery-powered tablets and handheld devices. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing low-noise, high-efficiency DC-DC conversion with fast transient response. Use Value: 1.5MHz operation minimizes solution size; 10µA shutdown current extends battery life between wake cycles. |
Use Scenario: Generating 3.3V rail for USB controllers, display interfaces, or sensor hubs in space-constrained mobile platforms. IC Role / Device Role / Timing Role: Compact, self-contained step-down converter replacing discrete controller + FET solutions. Use Value: Integrated MOSFETs and compensation reduce component count by ≥4 parts versus controller-based designs. |
| Broadband Infrastructure DC-DC | Industrial Embedded Controller Power |
|
Use Scenario: Local 3.3V supply for Ethernet PHYs, SerDes line cards, or packet processing ASICs in telecom line cards. IC Role / Device Role / Timing Role: High-reliability buck regulator supporting −40°C to +125°C operation with thermal shutdown protection. Use Value: Exposed-pad HTSSOP package sustains 2A load at 75°C ambient without heatsink; meets IPC-2221B Class 2 spacing. |
Use Scenario: Powering microcontroller peripherals, ADC references, and communication transceivers in programmable logic controllers. IC Role / Device Role / Timing Role: Robust, low-maintenance DC-DC stage with UVLO and thermal protection for unattended operation. Use Value: 2.85V minimum input supports brownout operation down to single-cell Li-ion (3.0V nominal); 38°C/W θJA simplifies thermal design. |
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-3.3 | 500kHz switching frequency; higher inductor/capacitor values required (e.g., 15µH/100µF) | Better light-load efficiency; larger solution size; lower EMI fundamental frequency | Select when board area permits larger magnetics and EMI filtering is prioritized over footprint |
| TPS62231DRVR | 3MHz switching; 1.8–6.5V input; 3.3V output accuracy ±1%; 0.65mm pitch WSON-6 package | Smaller package but no exposed thermal pad; lower max current (1.3A); no split-rail AVIN/PVIN support | Select for ultra-compact layouts where 1.3A load ceiling and absence of split-rail operation are acceptable |
Compared with LM2852YMXA-3.3 and TPS62231DRVR, the LM2852XMXA-3.3 uniquely balances 2A capability, 1.5MHz high-frequency operation, split-rail flexibility, and thermal performance in HTSSOP-14 - making it optimal for space-constrained industrial and communications applications demanding full 2A delivery.
Availability
LM2852XMXA-3.3 is available at Aetrix Electronics and suitable for FPGA core power, portable computing point-of-load, and broadband infrastructure DC-DC applications requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for LM2852XMXA-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 delivering analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The LM2852XMXA-3.3 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed to simplify high-efficiency DC-DC power design through integration of control, power switches, and compensation in thermally enhanced packages.
FAQ
What is the output voltage tolerance of the LM2852XMXA-3.3 over temperature?
The LM2852XMXA-3.3 has a factory-programmed 3.3V output with guaranteed tolerance of ±1.2% across the full operating junction temperature range of −40°C to +125°C, as specified in the Electrical Characteristics table under "VOUT = 3.3V option" with Min/Max limits of 3.2257V and 3.3743V. This accuracy is maintained without external feedback components due to internal EEPROM calibration and precision DAC reference.
Does the LM2852XMXA-3.3 require external compensation components?
No, the LM2852XMXA-3.3 integrates a complete type-three compensation network on-die. This eliminates the need for external resistors or capacitors in the feedback loop, reducing BOM count and layout complexity while ensuring stable operation with recommended output filter components (e.g., 1µH inductor and 10µF ceramic capacitor for 1.5MHz operation). The LM2852XMXA-3.3 datasheet confirms this in the COMPENSATION section.
What is the maximum allowable input voltage for the LM2852XMXA-3.3?
The absolute maximum rating for PVIN and AVIN pins of the LM2852XMXA-3.3 is 6.5V, but the recommended operating input voltage range is 2.85V to 5.5V. Operation above 5.5V risks exceeding safe operating area limits and may cause premature failure. The device's UVLO threshold is 2.85V (rising), and AVIN must always be ≥ PVIN when using split-rail configuration.
Can the LM2852XMXA-3.3 be used with a 3.3V input to generate a 3.3V output?
Yes, the LM2852XMXA-3.3 supports unity-gain operation with 3.3V input and 3.3V output, though efficiency drops significantly near 100% duty cycle. In practice, the device enters 100% duty-cycle mode only under light loads; heavier loads trigger switching action. Figure 3 in the datasheet shows >84% efficiency at 2A with PVIN = 3.3V and VOUT = 3.3V, confirming viable operation for low-dropout scenarios where input regulation is tight.
What is the purpose of the SNS pin on the LM2852XMXA-3.3?
The SNS (sense) pin on the LM2852XMXA-3.3 provides remote output voltage feedback by connecting directly to the load side of the output filter. This compensates for IR drop across PCB traces and output capacitor ESR, ensuring the regulated voltage at the load remains within ±1.2% of 3.3V. The LM2852XMXA-3.3 uses this signal in its internal error amplifier to maintain accuracy independent of board layout parasitics.
LM2852XMXA-3.3 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):
- 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
LM2852XMXA-3.3 FAQ
1.How can I place an order for LM2852XMXA-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-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 LM2852XMXA-3.3 reliable?
The price and inventory of LM2852XMXA-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 LM2852XMXA-3.3 is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-3.3?
LM2852XMXA-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-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 LM2852XMXA-3.3?
For technical support, including LM2852XMXA-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-3.3 requirements.
6.How does Aetrix verify that LM2852XMXA-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-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 LM2852XMXA-3.3 meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-3.3?
All LM2852XMXA-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-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 LM2852XMXA-3.3 part is unused and in its original packaging.
Return procedure for LM2852XMXA-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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