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Texas Instruments LM2852XMXA-2.5
- Part No.:
- LM2852XMXA-2.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-2.5.pdf
- Description:
- IC REG BUCK 2.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
LM2852XMXA-2.5 from Texas Instruments is a 2 A synchronous buck regulator with fixed 2.5 V output, 1.5 MHz switching frequency, input voltage range of 2.85–5.5 V, internal 60 mΩ MOSFETs, and HTSSOP-14 package with exposed thermal pad. It delivers point-of-load power to FPGA core rails and low-voltage ASIC supplies.
For engineers reviewing the LM2852XMXA-2.5 datasheet, LM2852XMXA-2.5 pinout, LM2852XMXA-2.5 application, or LM2852XMXA-2.5 equivalent, key selection criteria include 1.5 MHz operation for compact filter design, factory-programmed 2.5 V output tolerance (±2.25%), split-rail AVIN/PVIN capability, and integrated type-three compensation eliminating external compensation components.
Technical Context
The LM2852XMXA-2.5 implements voltage-mode PWM control with internal type-three compensation, enabling stable regulation without external compensation network. Its 1.5 MHz switching frequency supports small inductors (e.g., 6.8–10 µH) and ceramic output capacitors with ESR <10 mΩ.
Split-rail architecture separates AVIN (logic bias, 2.85–5.5 V) from PVIN (power FET supply, ≤AVIN), allowing independent optimization of control and power paths. Internal PFET/NFET switches exhibit 75 mΩ/55 mΩ typical RDS(on) at 25°C, supporting up to 2 A continuous load with thermal shutdown at 165°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.25% (2.444–2.556 V) over –40°C to 125°C junction temperature |
| Max Output Current | 2 A continuous; peak current limit 2.75–4.95 A ensures safe startup and overload protection |
| Switching Frequency | 1.5 MHz ±20% (1.05–1.825 MHz); enables compact 6.8–10 µH inductors and low-ESR ceramic output caps |
| Input Voltage Range | 2.85–5.5 V on AVIN; PVIN ≤ AVIN, supporting split-rail operation for optimized efficiency |
| RDS(on) (PFET/NFET) | 75 mΩ / 55 mΩ typical at 25°C; reduces conduction loss and improves full-load efficiency to ≥90% |
| Quiescent Current | 0.85 mA typical non-switching; 10 µA shutdown current minimizes battery drain in standby |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14); exposed pad enables high-power dissipation in space-constrained layouts |
Pinout & Package
LM2852XMXA-2.5 uses the 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥2.85 V and ≥PVIN; decoupling critical for noise immunity |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold ensures robust enable/disable margin |
| SGND (Pin 3) | Signal ground reference | Separate from PGND to minimize noise coupling into error amplifier and feedback path |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; controls output ramp time and prevents inrush current during startup |
| NC (Pins 5,12,13) | No connect | Must be left floating or tied to GND; no internal connection; avoids parasitic coupling |
| PVIN (Pins 6,7) | Power FET supply | Drives internal high-side/low-side MOSFETs; requires low-impedance local bulk capacitance |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate remote sensing and line-drop compensation |
| PGND (Pins 10,11) | Power ground return | Carries high di/dt switch currents; must connect to solid ground plane under exposed pad |
| SW (Pins 8,9) | Switch node | Connects to inductor; high dv/dt node requiring short, wide traces and minimal loop area to reduce EMI |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 2.5 V output | Eliminates external resistor divider; guarantees ±2.25% accuracy across temperature and line/load conditions |
| 1.5 MHz fixed-frequency operation | Enables use of sub-10 µH inductors and ceramic capacitors, reducing solution size by >40% vs 500 kHz variants |
| Internal type-three compensation | Removes need for external compensation network; simplifies design and improves stability across recommended L/C ranges |
| Split-rail AVIN/PVIN inputs | Allows independent optimization: AVIN can be derived from low-noise LDO while PVIN connects to noisy system rail |
| Exposed-pad HTSSOP-14 package | Reduces thermal resistance to 39.2°C/W; supports 2 A continuous operation without heatsink in standard 2-layer PCBs |
Applications
| Baseband Processor Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powers ARM-based baseband processors in LTE/5G infrastructure equipment requiring tight 2.5 V rail tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 2.5 V at up to 2 A with <10 µs transient recovery time. Use Value: Factory-set 2.5 V output eliminates calibration overhead; 1.5 MHz switching enables compact 6.8 µH inductor and 68 µF ceramic output cap. | Use Scenario: Supplies configurable I/O banks in Xilinx Artix-7 FPGAs where 2.5 V termination voltage must track load changes within ±3%. IC Role / Device Role / Timing Role: Point-of-load regulator with remote SNS feedback ensuring accurate voltage delivery at FPGA pins. Use Value: SGND/PGND separation and low 55 mΩ NFET RDS(on) maintain <50 mV load regulation error across 0–2 A load step. |
| Industrial PLC Digital I/O Module | Medical Imaging Sensor Interface |
Use Scenario: Powers isolated digital I/O drivers in programmable logic controllers operating in harsh industrial environments (–40°C to 85°C). IC Role / Device Role / Timing Role: Robust 2.5 V supply with thermal shutdown (165°C) and UVLO (2.85 V) protecting against brownout and overheating. Use Value: 10 µA shutdown current extends backup battery life; HTSSOP exposed pad sustains 2 A load at 85°C ambient without derating. | Use Scenario: Supplies analog front-end sensors in portable ultrasound devices where low EMI and precise 2.5 V reference are critical. IC Role / Device Role / Timing Role: Low-noise power source using split-rail AVIN (clean LDO) and PVIN (noisy battery), minimizing sensor offset drift. Use Value: AVIN/PGND isolation and internal compensation suppress switching noise below 10 µVpp at sensor output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXA-2.5 | 500 kHz switching frequency; higher inductance (10–15 µH) and larger output capacitance required | Better light-load efficiency; less suitable for ultra-compact designs due to larger magnetics | Select when EMI filtering is prioritized over board area; not drop-in due to different frequency-dependent component values |
| TPS54227 | 2.95–6.0 V input; 2 A; 700 kHz; integrated soft-start; no split-rail AVIN/PVIN support | Lacks AVIN/PVIN separation; requires single-input rail; lower RDS(on) (45/30 mΩ) improves full-load efficiency | Choose when input voltage exceeds 5.5 V or split-rail operation is unnecessary; requires layout revision for pinout and compensation |
Compared with LM2852YMXA-2.5, the LM2852XMXA-2.5 achieves 30% smaller solution size via 1.5 MHz operation but trades off light-load efficiency; versus TPS54227, it offers superior thermal management through the exposed-pad HTSSOP and flexible dual-rail biasing, albeit with tighter input voltage constraints.
Availability
LM2852XMXA-2.5 is available at Aetrix Electronics and suitable for FPGA core power, industrial PLC I/O modules, and medical imaging sensor interfaces requiring stable component supply and long-term production continuity.
Supply support for LM2852XMXA-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 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-constrained, high-efficiency point-of-load applications-designed to reduce external component count while maintaining robust thermal and electrical performance.
FAQ
What is the output voltage tolerance of LM2852XMXA-2.5 over temperature and load?
The LM2852XMXA-2.5 has a factory-programmed 2.5 V output with guaranteed tolerance of ±2.25% (2.4437 V to 2.5563 V) across –40°C to 125°C junction temperature and full 0–2 A load range, as specified in the Electrical Characteristics table under VOUT parameter for the 2.5-V option.
Does LM2852XMXA-2.5 support split-rail operation, and how is it implemented?
Yes, LM2852XMXA-2.5 supports split-rail operation: AVIN (Pin 1) powers the control logic and must be ≥2.85 V, while PVIN (Pins 6,7) supplies the power FETs and must be ≤AVIN. This allows clean biasing of analog circuitry while drawing high-current pulses from a separate, noisier rail-critical for noise-sensitive applications.
What is the recommended soft-start capacitor value for LM2852XMXA-2.5, and why?
The recommended soft-start capacitor for LM2852XMXA-2.5 is 2.7 nF (e.g., Vishay VJ0805Y272KXXA), connected between SS (Pin 4) and GND. This value yields ~3 ms startup time, preventing inrush current and ensuring controlled output ramp-essential for avoiding bus faults in multi-rail systems powered by LM2852XMXA-2.5.
Can LM2852XMXA-2.5 operate with input voltage below 2.85 V?
No, LM2852XMXA-2.5 cannot operate reliably below 2.85 V on AVIN-the undervoltage lockout (UVLO) threshold is 2.85 V (rising) with 85–210 mV hysteresis. Below this, the device remains disabled; PVIN may be as low as 1.5 V per Recommended Operating Conditions, but only when AVIN is valid.
What thermal performance can be expected from LM2852XMXA-2.5 in a standard 2-layer PCB?
In a standard 2-layer PCB with the exposed thermal pad soldered to a 1-in² copper pour, LM2852XMXA-2.5 achieves RθJA = 39.2°C/W. At 2 A load and 5 V input, power dissipation is ~0.3 W, resulting in ~12°C junction-to-ambient rise-well within the 125°C max junction rating even at 85°C ambient.
LM2852XMXA-2.5 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):
- 2.5V
- 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
LM2852XMXA-2.5 FAQ
1.How can I place an order for LM2852XMXA-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-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 LM2852XMXA-2.5 reliable?
The price and inventory of LM2852XMXA-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 LM2852XMXA-2.5 is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-2.5?
LM2852XMXA-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-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 LM2852XMXA-2.5?
For technical support, including LM2852XMXA-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-2.5 requirements.
6.How does Aetrix verify that LM2852XMXA-2.5 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-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 LM2852XMXA-2.5 meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-2.5?
All LM2852XMXA-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-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 LM2852XMXA-2.5 part is unused and in its original packaging.
Return procedure for LM2852XMXA-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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