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Texas Instruments LM2852YMXAX-2.5
- Part No.:
- LM2852YMXAX-2.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-2.5.pdf
- Description:
- IC REG BUCK 2.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2852YMXAX-2.5 from Texas Instruments is a 2A synchronous buck DC-DC regulator with fixed 2.5V output, 500kHz switching frequency, and input voltage range of 2.85V to 5.5V. It integrates dual MOSFETs (60mΩ PFET / 55mΩ NFET), internal type-three compensation, and soft-start control via external capacitor. Used in FPGA core power, portable computing, and point-of-load regulation where compact size and high efficiency at light-to-full load are critical.
For engineers reviewing the LM2852YMXAX-2.5 datasheet, LM2852YMXAX-2.5 pinout, LM2852YMXAX-2.5 application, or LM2852YMXAX-2.5 equivalent, key selection criteria include verified 2.5V ±2.25% output tolerance over –40°C to +125°C, 10µA shutdown current, HTSSOP-14 thermal performance (θJA = 38°C/W), and compatibility with ceramic or tantalum output capacitors (68–120µF, ESR 95–275mΩ).
Technical Context
The LM2852YMXAX-2.5 employs voltage-mode PWM control with internal oscillator set to 500kHz (±37.5kHz), delivering stable regulation across 0–2A load with ≤8mV/A load regulation. Its integrated 60mΩ high-side and 55mΩ low-side MOSFETs enable high-efficiency operation without external switches.
It features factory-programmed 2.5V output (not adjustable), UVLO with 2.47V rising threshold and 85mV hysteresis, and soft-start controlled by an internal 400kΩ resistor charging external CSS (2.7nF typical). The exposed-pad HTSSOP-14 package supports thermal dissipation up to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.25% (2.4437V to 2.5563V) over full temperature and line range - ensures precise core rail compliance for ASIC/FPGA logic. |
| Max Output Current | 2A continuous - supports mid-power digital loads without external current boosting. |
| Switching Frequency | 500kHz (325–625kHz range) - balances inductor size (6.8–10µH) and efficiency for 3.3V input to 2.5V output conversion. |
| Input Voltage Range | 2.85V to 5.5V - compatible with single-cell Li-ion, USB 3.3V rails, and regulated 5V supplies. |
| Shutdown Quiescent Current | 10µA - enables ultra-low power state retention in battery-powered systems. |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects against sustained overload or poor PCB heatsinking. |
| Package | 14-pin HTSSOP (PWP0014A) with exposed thermal pad - achieves θJA = 38°C/W for reliable 2A operation without forced airflow. |
Pinout & Package
LM2852YMXAX-2.5 is housed in a 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed die attach pad soldered to PCB ground for enhanced thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥2.85V and ≤5.5V; 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 - supports simple on/off sequencing. |
| SGND (3) | Signal ground reference | Return path for error amplifier and control circuitry; must be isolated from PGND until joined at single-point ground. |
| SS (4) | Soft-start timing node | Connects to external capacitor (1–50nF); 2.7nF yields ~3ms startup - prevents inrush current and output overshoot. |
| NC (5, 12, 13) | No-connect | Must be left floating or tied to GND; no internal connection - avoids unintended coupling or leakage paths. |
| PVIN (6, 7) | Main power input | Supplies high-current path to internal PFET source; requires low-ESR input capacitor (22µF ceramic) placed adjacent to pins. |
| SW (8, 9) | Power switch node | Drives external inductor; high di/dt node - demands short, wide trace routing to minimize EMI and conduction loss. |
| PGND (10, 11) | Power ground return | Return path for PFET/NFET currents; connects to large internal ground plane - critical for thermal dissipation and ripple suppression. |
| SNS (14) | Output voltage sense | High-impedance feedback input; connect directly to load VOUT via Kelvin trace - rejects PCB IR drop for ±0.5% regulation accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 60mΩ PFET + 55mΩ NFET - eliminates external switch count and gate-drive complexity while maintaining >90% peak efficiency at 2A. |
| Internal type-three compensation | On-chip compensation network - removes need for external RCZ components and simplifies stability tuning for standard 68–120µF/6.8–10µH output filters. |
| Voltage-mode PWM control | Duty cycle directly proportional to error amp output - provides predictable transient response and straightforward loop analysis vs current-mode alternatives. |
| Factory-set 2.5V output | Non-adjustable, laser-trimmed reference - guarantees ±2.25% tolerance without external resistive divider, reducing BOM and layout area. |
| Low standby current | 10µA shutdown current - extends battery life in always-on subsystems such as real-time clocks or sensor wake-up circuits. |
Applications
| FPGA Core Power Supply | Portable Computing PMIC Sub-Rail |
|---|---|
Use Scenario: Delivering clean, regulated 2.5V to FPGA I/O banks or auxiliary logic blocks during active configuration and runtime. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing point-of-load conversion from 3.3V system rail. Use Value: Delivers 2A at >92% efficiency (3.3VIN) with <2.3mV p-p output ripple, meeting Xilinx/Intel I/O voltage tolerance specs. |
Use Scenario: Generating 2.5V for SSD controller, display interface, or audio codec in ultrabook or tablet platforms. IC Role / Device Role / Timing Role: Secondary regulated rail derived from main 5V or 3.3V battery-connected supply. Use Value: Enables fast dynamic voltage scaling via EN pin control and maintains regulation down to 0A load with <10µA quiescent draw. |
| Broadband Networking PHY Interface | Industrial IoT Sensor Hub Power |
Use Scenario: Powering Ethernet PHY transceivers (e.g., Marvell 88E1512) requiring tightly regulated 2.5V analog supply. IC Role / Device Role / Timing Role: Dedicated low-noise buck converter decoupled from digital supply domains. Use Value: Achieves <10mV load regulation and <0.6% line regulation - prevents PHY link instability under varying backplane voltage. |
Use Scenario: Supplying 2.5V to precision ADCs, op-amps, and wireless SoCs (e.g., Nordic nRF52840) in edge-node sensor modules. IC Role / Device Role / Timing Role: High-reliability, thermally robust DC-DC stage operating continuously at –40°C to +85°C ambient. Use Value: Maintains 2.5V output within spec over full industrial temp range with 165°C thermal shutdown protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXAX-2.5 | 1.5MHz switching frequency; same 2.5V output, 2A rating, and HTSSOP-14 package - requires smaller inductor (1–10µH) but higher switching losses at heavy load. | Preferred for space-constrained designs needing <10µH inductors; less suitable for high-efficiency 2A continuous operation at 3.3V input. | Select LM2852XMXAX-2.5 only when board area is primary constraint and efficiency above 1A is secondary. |
| TPS62231DRYT | 3MHz fixed-frequency buck; 2A max; 2.5V output; 6-pin WSON package - lacks SNS pin for remote sensing and has no soft-start capacitor option. | Targeted at ultra-compact consumer electronics; not recommended for applications requiring <1% load regulation or Kelvin-sense accuracy. | Choose TPS62231DRYT only for cost-sensitive, low-complexity designs where remote sensing and precise soft-start are unnecessary. |
Compared with LM2852XMXAX-2.5 and TPS62231DRYT, the LM2852YMXAX-2.5 delivers superior load regulation (8mV/A), true remote sensing via SNS pin, and programmable soft-start - making it the optimal choice for industrial and communications applications demanding long-term stability and design margin.
Availability
LM2852YMXAX-2.5 is available at Aetrix Electronics and suitable for FPGA core power, portable computing sub-rails, and broadband networking PHY interfaces requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for LM2852YMXAX-2.5 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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2852YMXAX-2.5 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed specifically for low-component-count, high-efficiency point-of-load power delivery in space- and thermal-constrained applications.
FAQ
What is the output voltage tolerance of the LM2852YMXAX-2.5 over temperature and line variation?
The LM2852YMXAX-2.5 has a guaranteed output voltage tolerance of ±2.25% (2.4437V to 2.5563V) across the full operating junction temperature range of –40°C to +125°C and input voltage range of 2.85V to 5.5V. This specification is ensured by factory laser trimming and validated per the SNVS325D datasheet Electrical Characteristics table under "VOUT Tolerance" for the 2.5V option.
Can the LM2852YMXAX-2.5 be used with a 3.3V input to deliver 2.5V at 2A?
Yes, the LM2852YMXAX-2.5 is fully specified for 3.3V input operation delivering 2.5V at up to 2A. At this condition, typical efficiency exceeds 92% (per Figure 4), and recommended output filter values are 6.8–10µH inductor and 68–120µF capacitor with ESR between 95mΩ and 275mΩ - all confirmed in Table 1 of the SNVS325D datasheet.
Does the LM2852YMXAX-2.5 require external compensation components?
No, the LM2852YMXAX-2.5 includes a fully integrated type-three compensation network. No external capacitors or resistors are needed for loop stability when using output filter components within the recommended ranges (e.g., 6.8–10µH inductor and 68–120µF capacitor for 2.5V output), as specified in the Compensation section of the SNVS325D datasheet.
What is the purpose of the SNS pin on the LM2852YMXAX-2.5, and how should it be connected?
The SNS pin on the LM2852YMXAX-2.5 is the high-impedance voltage feedback input for remote output sensing. It must be connected directly to the load-side of the output capacitor - ideally via a dedicated Kelvin trace - to reject PCB trace resistance and ensure ±0.5% regulation accuracy at the point of load, as detailed in the Layout Hints section of the SNVS325D datasheet.
Is the LM2852YMXAX-2.5 pin-compatible with other variants in the LM2852 family?
Yes, all LM2852Y and LM2852X variants - including LM2852YMXAX-2.5, LM2852YMXA-2.5, and LM2852XMXAX-2.5 - share identical 14-pin HTSSOP (PWP0014A) packaging and pinout. However, switching frequency (500kHz vs 1.5MHz) and internal reference voltage are fixed per variant, so direct substitution requires verification of loop stability and inductor/capacitor compatibility.
LM2852YMXAX-2.5 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):
- 2.5V
- 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
LM2852YMXAX-2.5 FAQ
1.How can I place an order for LM2852YMXAX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-2.5 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 LM2852YMXAX-2.5 reliable?
The price and inventory of LM2852YMXAX-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXAX-2.5 is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-2.5 transactions.
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4.How is shipping managed for LM2852YMXAX-2.5?
LM2852YMXAX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-2.5 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 LM2852YMXAX-2.5?
For technical support, including LM2852YMXAX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-2.5 requirements.
6.How does Aetrix verify that LM2852YMXAX-2.5 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-2.5 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 LM2852YMXAX-2.5 meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-2.5?
All LM2852YMXAX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-2.5, 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 LM2852YMXAX-2.5 part is unused and in its original packaging.
Return procedure for LM2852YMXAX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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