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Texas Instruments LM2852XMXA-3.3/NOPB
- Part No.:
- LM2852XMXA-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-3.3/NOPB.pdf
- Description:
- IC REG BUCK 3.3V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:415
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Product details
Overview
LM2852XMXA-3.3/NOPB from Texas Instruments is a 2 A synchronous buck regulator with fixed 3.3 V output, 1.5 MHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ PFET/NFET switches, and HTSSOP-14 package with exposed thermal pad. It delivers high-efficiency point-of-load regulation for FPGA core supplies and portable computing power rails.
For engineers reviewing the LM2852XMXA-3.3/NOPB datasheet, LM2852XMXA-3.3/NOPB pinout, LM2852XMXA-3.3/NOPB application, or LM2852XMXA-3.3/NOPB equivalent, key selection criteria include verified 1.5 MHz operation, factory-programmed 3.3 V output tolerance (±2.23%), thermal performance in HTSSOP-14, soft-start capacitor interface (CSS), and split-rail AVIN/PVIN capability.
Technical Context
The LM2852XMXA-3.3/NOPB implements voltage-mode control with internal type-three compensation, eliminating external compensation components. Its 1.5 MHz switching frequency enables compact filter design using low-inductance (1–10 µH) ceramic output capacitors with ESR < 10 mΩ.
Split-rail architecture separates AVIN (2.85–5.5 V logic bias) from PVIN (2.85–5.5 V power FET supply), allowing independent optimization of control and power paths. Switch node protection prevents shoot-through during light-load startup, ensuring stable regulation before oscillation begins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2.23% (3.2257–3.3743 V) at TJ = –40°C to 125°C - ensures stable I/O rail compliance for 3.3 V logic interfaces. |
| Max Load Current | 2 A continuous - supports mid-power FPGA I/O banks or dual-core microcontrollers without derating. |
| Switching Frequency | 1.5 MHz (LM2852X variant) - enables use of ≤10 µH inductors and ceramic output capacitors, reducing board area by >40% vs 500 kHz designs. |
| Input Voltage Range | 2.85 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V), USB 5 V, and regulated 3.3 V system rails. |
| FET ON Resistance | PFET 75 mΩ / NFET 55 mΩ at TJ = 25°C - limits conduction loss to <120 mW at 2 A, supporting >90% efficiency at 1 A load with 5 V input. |
| Quiescent Current | 0.85 mA non-switching, 10 µA shutdown - extends battery life in always-on subsystems while enabling fast wake-up. |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14) - allows 1.2 W dissipation at 25°C ambient before reaching 125°C junction limit under natural convection. |
Pinout & Package
LM2852XMXA-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 | Powers internal logic; must be ≥2.85 V and ≥PVIN - decoupled with 1 µF ceramic near pin. |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable - supports system-level power sequencing with 75% AVIN VIH threshold. |
| SGND (Pin 3) | Signal ground reference | Separate from PGND to minimize noise coupling into error amplifier - routed directly to AVIN capacitor ground. |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; sets output ramp time - 2.7 nF yields ~3 ms startup, preventing inrush current tripping. |
| NC (Pins 5, 12, 13) | No connect | Must be left floating or tied to GND - no internal connection; avoids parasitic coupling in high-noise layouts. |
| PVIN (Pins 6, 7) | Power FET supply | Drives internal switches; requires low-ESR bulk capacitor (e.g., 47 µF ceramic) placed within 2 mm of pins. |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node - routed as Kelvin connection directly to load to reject PCB IR drop. |
| PGND (Pins 10, 11) | Power ground return | Carries high di/dt switch currents - connected to thermal pad and dedicated inner-layer ground plane. |
| SW (Pins 8, 9) | Switch node | Connects to inductor; carries full switching waveform - minimized trace length/area reduces EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables predictable loop response with minimal phase margin tuning - eliminates need for external compensation network. |
| Internal type-three compensation | Guarantees stability across recommended L/C/ESR ranges (e.g., 1–10 µH inductor + 10–100 µF ceramic capacitor). |
| Split-rail AVIN/PVIN operation | Allows AVIN = 3.3 V logic rail while PVIN = 5 V power rail - isolates digital noise from power stage, improving PSRR. |
| Switch node protection | Prevents uncontrolled switching during no-load startup - ensures output reaches 3.3 V before oscillation begins, avoiding undershoot. |
| Exposed thermal pad (HTSSOP-14) | Reduces RθJC(bot) to 1.7°C/W - enables 1.5× higher power density vs non-exposed packages at same ambient temperature. |
Applications
| Baseband Processor Power | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Powers ARM-based baseband processors in LTE modems requiring clean 3.3 V I/O rails with fast transient response to burst data traffic. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 3.3 V from 3.8 V Li-ion battery or 5 V system rail. Use Value: 1.5 MHz switching maintains >88% efficiency at 1.5 A load with 5 V input, minimizing thermal impact on adjacent RF sections. | Use Scenario: Supplies configurable I/O banks in Xilinx Artix-7 FPGAs where multiple voltage domains require independent, low-noise regulation. IC Role / Device Role / Timing Role: Dedicated point-of-load converter with Kelvin-sensed SNS pin ensuring <±1% load regulation across 0–2 A. Use Value: Internal 60 mΩ FETs and type-three compensation deliver <50 µs transient recovery to ±3% for 1 A step loads, meeting FPGA I/O timing margins. |
| Industrial HMI Display Backlight | USB-C PD Sink Power Rail |
Use Scenario: Generates 3.3 V bias for TFT-LCD controller ICs and touch controller in ruggedized human-machine interface panels. IC Role / Device Role / Timing Role: Fixed-output buck regulator interfacing with 24 V DC input via intermediate 5 V pre-regulator. Use Value: Wide 2.85–5.5 V input range accommodates 5 V pre-regulator dropout; 10 µA shutdown current enables low-power sleep mode. | Use Scenario: Provides 3.3 V auxiliary rail for USB-C PD controller, level shifters, and USB PHY in laptop docking stations. IC Role / Device Role / Timing Role: Secondary buck stage converting negotiated 5 V/9 V/15 V USB-C PD bus to stable 3.3 V system rail. Use Value: 1.5 MHz operation allows use of 4.7 µH shielded inductor and 22 µF X5R ceramic capacitor, fitting within tight 12 mm × 12 mm layout area. |
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/NOPB | 500 kHz switching frequency, identical pinout and 3.3 V output - higher inductor/capacitor values required (e.g., 15 µH vs 1 µH). | Better light-load efficiency at 500 kHz; suited for thermally constrained but space-tolerant designs. | Select when lower EMI and higher efficiency below 500 mA load outweigh board area constraints. |
| TPS62231DRVR | 3 MHz switching, 2 A rating, 3.3 V fixed output - smaller 6-pin WSON package, no split-rail AVIN/PVIN support. | Lacks separate AVIN/PVIN; requires single 2.95–6.0 V input - simpler BOM but less flexible for mixed-rail systems. | Select when ultra-compact size and highest possible switching frequency are prioritized over rail separation. |
Compared with LM2852YMXA-3.3/NOPB, the LM2852XMXA-3.3/NOPB trades slightly lower light-load efficiency for 3× higher frequency and 90% smaller magnetics; versus TPS62231DRVR, it offers superior thermal management via HTSSOP-14 and split-rail flexibility at the cost of larger footprint.
Availability
LM2852XMXA-3.3/NOPB is available at Aetrix Electronics and suitable for FPGA power delivery, industrial HMI displays, and USB-C PD sink applications requiring stable component supply, long-term lifecycle assurance, and TI-authorized traceability.
Supply support for LM2852XMXA-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 leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability DC-DC conversion.
The LM2852 product line delivers integrated synchronous buck regulators optimized for space-constrained, high-efficiency point-of-load applications in portable and industrial electronics - emphasizing thermal performance, ease of design, and factory-programmed precision.
FAQ
What is the switching frequency of the LM2852XMXA-3.3/NOPB?
The LM2852XMXA-3.3/NOPB operates at a fixed 1.5 MHz switching frequency, confirmed in the datasheet's Electrical Characteristics table (fosc = 1050–1825 kHz over temperature). This distinguishes it from the 500 kHz LM2852Y variant and enables compact filter design with low-inductance ceramic inductors and capacitors.
Does the LM2852XMXA-3.3/NOPB support split-rail operation?
Yes, the LM2852XMXA-3.3/NOPB supports split-rail operation: AVIN (Pin 1) powers the control logic and can be set independently from PVIN (Pins 6,7), which supplies the power FETs. PVIN must be ≤ AVIN and both rails operate within 2.85–5.5 V - enabling noise isolation between digital and power domains.
What is the output voltage tolerance of the LM2852XMXA-3.3/NOPB?
The LM2852XMXA-3.3/NOPB has a factory-programmed 3.3 V output with guaranteed tolerance of ±2.23% (3.2257 V to 3.3743 V) across –40°C to 125°C junction temperature, per Section 6.5 "Electrical Characteristics" of the SNVS325E datasheet.
How is soft-start configured on the LM2852XMXA-3.3/NOPB?
The LM2852XMXA-3.3/NOPB uses an external capacitor on the SS pin (Pin 4) to control soft-start timing. A 2.7 nF capacitor yields ~3 ms startup; the supported range is 1–50 nF. The internal DAC resistor is 400 kΩ, and three RC time constants determine 95% output settling - no external resistor is required.
What thermal metrics apply to the LM2852XMXA-3.3/NOPB package?
The LM2852XMXA-3.3/NOPB in HTSSOP-14 (PWP) package has RθJA = 39.2°C/W, RθJC(bot) = 1.7°C/W, and RθJB = 20.1°C/W. These values assume the exposed thermal pad is soldered to a 1-in² copper area on the PCB - critical for sustaining 2 A continuous load without exceeding 125°C junction temperature.
LM2852XMXA-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:
- 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/NOPB FAQ
1.How can I place an order for LM2852XMXA-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-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 LM2852XMXA-3.3/NOPB reliable?
The price and inventory of LM2852XMXA-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 LM2852XMXA-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-3.3/NOPB?
LM2852XMXA-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-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 LM2852XMXA-3.3/NOPB?
For technical support, including LM2852XMXA-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-3.3/NOPB requirements.
6.How does Aetrix verify that LM2852XMXA-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-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 LM2852XMXA-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-3.3/NOPB?
All LM2852XMXA-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-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 LM2852XMXA-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM2852XMXA-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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