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Texas Instruments LM2852XMXAX-1.5
- Part No.:
- LM2852XMXAX-1.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXAX-1.5.pdf
- Description:
- IC REG BUCK 1.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,058
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Product details
Overview
LM2852XMXAX-1.5 from Texas Instruments is a 2A synchronous buck regulator with fixed 1.5V output, 1.5MHz switching frequency, and input voltage range of 2.85V to 5.5V. It integrates dual MOSFETs (60mΩ PFET/45mΩ NFET), internal type-three compensation, and soft-start control-designed for point-of-load regulation in FPGA core supplies and portable computing power rails.
For engineers reviewing the LM2852XMXAX-1.5 datasheet, LM2852XMXAX-1.5 pinout, LM2852XMXAX-1.5 application, or LM2852XMXAX-1.5 equivalent, key selection criteria include its 1.5MHz high-frequency operation enabling compact LC filters, factory-trimmed ±1.7% output tolerance at 25°C, low 10µA shutdown current, and HTSSOP-14 exposed-pad thermal package for industrial-grade thermal management.
Technical Context
The LM2852XMXAX-1.5 uses voltage-mode PWM control with an integrated oscillator set to 1.5MHz (±22% over temperature), supporting duty cycles from 0% to 100%. Its internal type-three compensation network eliminates external compensation components, while the dedicated SNS pin enables remote output voltage sensing for improved load regulation.
It features separate AVIN (bias logic) and PVIN (power FET supply) rails, allowing split-rail operation; UVLO triggers at 2.47V AVIN with 85mV hysteresis, and thermal shutdown activates at 165°C with 10°C hysteresis. Peak current limit is 2.75A–4.95A, ensuring robust overload protection without external sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1.7% (25°C), ±2.2% (–40°C to +125°C) |
| Max Output Current | 2A continuous; supports full load without derating up to +125°C junction |
| Switching Frequency | 1.5MHz nominal (1050–1825kHz range); enables use of ≤10µH inductors and ceramic output capacitors |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same or lower voltage (e.g., 3.3V or 5V) |
| Quiescent Current | 2mA typical non-switching; 10µA shutdown current reduces system standby power |
| Internal MOSFET RDS(on) | 75mΩ PFET / 55mΩ NFET (typical at 25°C); enables >90% efficiency at 1.5V/2A with 3.3V input |
| Soft-Start Time | Configurable via external capacitor (1–50nF); 2.7nF yields ~3ms ramp (95% VOUT) |
Pinout & Package
LM2852XMXAX-1.5 is housed in a 14-pin HTSSOP package (PWP0014A) with exposed thermal pad, offering θJA = 38°C/W and rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Powers internal logic; must be ≥2.85V; can be tied to PVIN or separate rail |
| EN (2) | Enable control | Internally pulled up; connect to GND to disable; VIH ≥75% AVIN, VIL ≤25% AVIN |
| SGND (3) | Signal ground reference | Reference for error amplifier and internal circuits; separate from PGND for noise immunity |
| SS (4) | Soft-start timing node | Connects to external capacitor (1–50nF); sets output ramp time and fault recovery behavior |
| NC (5, 12, 13) | No-connect | Must be left floating or grounded; no internal connection |
| PVIN (6, 7) | Main power input | Supplies internal PFET source; requires low-ESR input capacitor placed adjacent to pins |
| SNS (14) | Output voltage sense | Remote feedback node; connect directly to load for <8mV/A load regulation |
| SW (8, 9) | Power switch node | Drives external inductor; high di/dt node requiring short, wide PCB trace |
| PGND (10, 11) | Power ground return | High-current return path for PFET/NFET; tie to large copper plane under exposed pad |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output | 1.5V fixed (no external resistor divider required; eliminates BOM and layout variability) |
| Integrated type-three compensation | Eliminates external compensation network; ensures stability with recommended L/C ranges (e.g., 1–10µH, 10–100µF) |
| 1.5MHz high-frequency operation | Reduces inductor size by ~3× vs 500kHz version; enables ultra-compact 1210 or smaller output capacitors |
| Separate AVIN/PVIN rails | Allows optimized bias sequencing and reduced power loss when PVIN < AVIN (e.g., 3.3V PVIN, 5V AVIN) |
| Exposed thermal pad | Enables direct solder connection to internal ground plane; critical for maintaining TJ ≤125°C at 2A full load |
Applications
| Point-of-Load Regulation | FPGA Core Supply |
|---|---|
Use Scenario: Regulating 3.3V or 5V system rail to 1.5V for low-voltage I/O banks in Xilinx Artix-7 or Intel Cyclone V FPGAs. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering tightly regulated 1.5V at up to 2A with fast transient response. Use Value: Achieves >92% efficiency at 1.5V/2A with 3.3V input using 1µH inductor and 10µF ceramic output cap-reducing board area by 40% vs 500kHz solutions. | Use Scenario: Powering ARM Cortex-A9 processor cores in embedded SoM designs where thermal density and PCB real estate are constrained. IC Role / Device Role / Timing Role: Core voltage regulator with remote sensing (SNS pin) to maintain ±1.5% accuracy across PCB voltage drop. Use Value: Internal 55mΩ/75mΩ MOSFETs and 1.5MHz switching minimize conduction and switching losses, enabling operation at 85°C ambient without heatsink. |
| Portable Computing Rail | Broadband Networking PHY |
Use Scenario: Generating 1.5V supply for DDR3L memory termination or USB 3.0 controller in thin-client laptops. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with 10µA shutdown current to extend battery life during sleep states. Use Value: Low quiescent current and fast enable/disable (EN pin) support dynamic power gating, reducing system idle power by >30% vs discrete solutions. | Use Scenario: Providing clean 1.5V bias to Ethernet PHY ICs (e.g., TI DP83867) in 1U rack-mounted switches. IC Role / Device Role / Timing Role: Local regulator with UVLO hysteresis and thermal shutdown to ensure reliable operation under line transients and airflow loss. Use Value: 165°C thermal shutdown with 10°C hysteresis prevents latch-up during sustained overloads, improving field reliability in fanless deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXAX-1.5 | 500kHz switching frequency; requires larger 10–15µH inductor and 100µF tantalum/ceramic output cap | Better EMI profile at lower frequency; suited for noise-sensitive analog subsystems | Select when board space allows larger magnetics and lower switching noise is prioritized over size |
| TPS62231DRYT | 1.5MHz, 2A, but uses D-CAP2 control (not voltage-mode); 0.6V–5.5V adjustable output; no SNS pin | Lacks remote sensing; requires external feedback resistors; higher light-load efficiency via DCS-Control | Choose when adjustable output or superior light-load efficiency is needed, accepting trade-off in load regulation accuracy |
Compared with LM2852YMXAX-1.5 and TPS62231DRYT, the LM2852XMXAX-1.5 delivers superior load regulation (≤8mV/A) via dedicated SNS pin and fixed 1.5V output eliminates resistor tolerance errors-critical for FPGA core rails where voltage margin is tight.
Availability
LM2852XMXAX-1.5 is available at Aetrix Electronics and suitable for FPGA core supplies, portable computing power rails, and broadband networking PHY regulation requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for LM2852XMXAX-1.5 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, with decades of expertise in high-reliability power conversion ICs.
The LM2852XMXAX-1.5 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for minimal external component count and rapid design-in in space-constrained, thermally demanding applications like portable and networking equipment.
FAQ
What is the maximum input voltage rating for LM2852XMXAX-1.5?
The LM2852XMXAX-1.5 has an absolute maximum PVIN/AVIN rating of 6.5V, but its specified operating input range is 2.85V to 5.5V. Exceeding 5.5V may cause permanent damage or violate SOA limits, especially under high ambient temperature or full load conditions. Always observe the 5.5V upper limit in production designs.
Does LM2852XMXAX-1.5 require external compensation components?
No, the LM2852XMXAX-1.5 integrates a complete type-three compensation network internally. This eliminates the need for external op-amp, resistors, or capacitors in the feedback loop-reducing BOM count, PCB area, and design validation effort while ensuring stability with TI-recommended inductor and capacitor values.
Can LM2852XMXAX-1.5 operate with different voltages on AVIN and PVIN pins?
Yes, the LM2852XMXAX-1.5 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 efficiency-for example, using 3.3V PVIN with 5V AVIN reduces conduction loss in the PFET while maintaining logic integrity.
What is the purpose of the SNS pin on LM2852XMXAX-1.5?
The SNS pin on LM2852XMXAX-1.5 provides remote output voltage sensing, connecting directly to the load to compensate for PCB trace IR drop. This achieves ≤8mV/A load regulation-critical for precision rails like FPGA cores-where standard VOUT feedback would introduce significant error due to routing resistance between the IC and load.
Is LM2852XMXAX-1.5 pin-compatible with LM2852YMXAX-1.5?
Yes, LM2852XMXAX-1.5 and LM2852YMXAX-1.5 share identical HTSSOP-14 (PWP) packaging, pinout, and footprint. They differ only in switching frequency (1.5MHz vs 500kHz) and internal oscillator calibration-enabling direct substitution in existing layouts when updating for higher frequency or smaller magnetics, provided output filter components are reselected per Table 1.
LM2852XMXAX-1.5 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):
- 1.5V
- 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-1.5 FAQ
1.How can I place an order for LM2852XMXAX-1.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXAX-1.5 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-1.5 reliable?
The price and inventory of LM2852XMXAX-1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXAX-1.5 is usually 5 days.
3.What payment methods are accepted for LM2852XMXAX-1.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXAX-1.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXAX-1.5?
LM2852XMXAX-1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXAX-1.5 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-1.5?
For technical support, including LM2852XMXAX-1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXAX-1.5 requirements.
6.How does Aetrix verify that LM2852XMXAX-1.5 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXAX-1.5 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-1.5 meets industry standards.
7.What is the process for return or replacement of LM2852XMXAX-1.5?
All LM2852XMXAX-1.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXAX-1.5, 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-1.5 part is unused and in its original packaging.
Return procedure for LM2852XMXAX-1.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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