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Texas Instruments LM2852YMXAX-2.5/NOPB
- Part No.:
- LM2852YMXAX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-2.5/NOPB.pdf
- Description:
- IC REG BUCK 2.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
LM2852YMXAX-2.5/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 2.5V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ PFET/NFET switches, and voltage-mode control architecture. It delivers point-of-load power for FPGA core rails in portable computing systems with ±2.25% output tolerance at 25°C.
For engineers reviewing the LM2852YMXAX-2.5/NOPB datasheet, LM2852YMXAX-2.5/NOPB pinout, LM2852YMXAX-2.5/NOPB application, or LM2852YMXAX-2.5/NOPB equivalent, key selection criteria include its factory-programmed 2.5V output, HTSSOP-14 thermal performance (RθJA = 39.2°C/W), soft-start capacitor programmability (1–50 nF), and integrated type-three compensation eliminating external loop components.
Technical Context
The LM2852YMXAX-2.5/NOPB implements voltage-mode PWM control with internal type-three compensation, enabling stable regulation without external compensation networks. Its split-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), allowing independent optimization of control and power paths.
Switch node protection logic disables switching under no-load or light-load conditions until output loading triggers normal operation - a behavior confirmed in functional mode documentation. Thermal shutdown activates at 165°C with 10°C hysteresis, and UVLO engages below 2.85 V on AVIN with 85–210 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.25% (2.4437–2.5563 V) at TJ = 25°C; factory EEPROM-programmed, not adjustable |
| Max Load Current | 2 A continuous; peak current limit is 2.25–3.65 A over temperature, preventing switch overcurrent |
| Switching Frequency | 500 kHz ±37.5% (325–625 kHz); enables compact magnetics while balancing efficiency and EMI |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN must be ≤ AVIN and ≥1.5 V; supports single-supply or split-rail operation |
| Quiescent Current | 0.85 mA typical (non-switching, TJ = 25°C); 10 µA shutdown current enables low-power standby modes |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14); RθJC(bot) = 1.7°C/W enables direct PCB copper thermal conduction |
| FET ON Resistance | 75 mΩ PFET / 55 mΩ NFET typical at TJ = 25°C; reduces conduction loss at full load |
Pinout & Package
LM2852YMXAX-2.5/NOPB uses an exposed-pad HTSSOP-14 package (5.00 mm × 4.40 mm) with thermal pad soldered to PCB ground plane for enhanced heat dissipation. Pin numbering follows standard top-view layout with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Powers internal logic; must be ≥2.85 V; can be separate from PVIN for optimal noise isolation |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for high-level enable |
| SGND (Pin 3) | Signal ground reference | Reference for error amplifier and feedback network; separate from PGND to minimize noise coupling |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; controls output ramp rate and prevents inrush current |
| 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; must be ≤ AVIN; high-current path requiring low-impedance layout |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate remote sensing |
| PGND (Pins 10, 11) | Power ground return | Return path for switch currents; tie to large internal ground plane to minimize voltage bounce |
| SW (Pins 8, 9) | Switch node | Connects to inductor; carries high di/dt; requires short, wide trace to reduce EMI and losses |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates need for external compensation components, reducing BOM count and layout sensitivity |
| Split-Rail Operation (AVIN/PVIN) | Enables independent optimization of logic supply noise immunity and power rail efficiency |
| Internal 60-mΩ Power Switches | Reduces conduction loss and eliminates external MOSFET drivers, simplifying design and improving thermal margin |
| Switch Node Protection Logic | Prevents device damage during startup or fault by disabling switching until load stabilizes |
| Exposed Thermal Pad (HTSSOP-14) | Provides 1.7°C/W junction-to-board thermal resistance, enabling reliable 2A operation without heatsink |
Applications
| Portable Computing Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM-based SoC cores in ultrabooks where input is 3.3 V and precise 2.5 V rail is required for memory interface logic. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 2.5 V at up to 2 A with <1% load regulation drift across 0–2 A. Use Value: Achieves >92% efficiency at 1 A load (PVIN = 3.3 V), minimizing thermal impact in space-constrained chassis. | Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 FPGAs where 2.5 V tolerance must stay within ±2.5% across temperature and line variation. IC Role / Device Role / Timing Role: Fixed-output buck regulator with remote sense (SNS pin) ensuring voltage accuracy at the FPGA ball, not at IC pins. Use Value: Internal 55 mΩ NFET + 75 mΩ PFET limits voltage drop to <110 mV at 2 A, meeting FPGA VCCIO spec margins. |
| Industrial PLC Digital I/O Module | Medical Imaging Sensor Interface |
Use Scenario: Providing isolated 2.5 V power to digital isolators and level translators in DIN-rail mounted PLC modules operating from 5 V backplane. IC Role / Device Role / Timing Role: Secondary regulator downstream of primary 5 V supply; enabled via microcontroller GPIO on EN pin. Use Value: 10 µA shutdown current extends system battery life during sleep mode; thermal shutdown protects against ambient overtemperature. | Use Scenario: Powering high-speed ADC front-end circuitry in portable ultrasound devices where low-noise 2.5 V reference is critical for SNR. IC Role / Device Role / Timing Role: Low-ripple DC-DC source feeding ADC reference buffer; SNS pin routed directly to buffer input for minimal IR drop. Use Value: 500 kHz switching allows use of small 6.8 µH inductor and 68 µF ceramic output cap, reducing board area and EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3 MHz switching, 0.6–5.5 V adjustable output, 0.65 µA quiescent current; no split-rail AVIN/PVIN | Higher frequency enables smaller inductors but lacks remote sense and internal compensation tuning | Select when ultra-low IQ and footprint reduction outweigh need for fixed 2.5 V and simplified layout |
| MP2108DJ-LF-Z | 1.5 MHz, 0.8–5.5 V adjustable output, 2.5 A rating, 30 µA IQ; no soft-start pin or type-three compensation | Requires external compensation and feedback resistors; less suited for noise-sensitive analog loads | Select when cost sensitivity dominates and design team has expertise in loop compensation |
Compared with TPS62231DRVR and MP2108DJ-LF-Z, LM2852YMXAX-2.5/NOPB provides guaranteed 2.5 V accuracy without resistor dividers, eliminates compensation design effort, and supports split-rail inputs for improved noise rejection - making it optimal for production-ready FPGA and SoC core supplies where time-to-market and reliability are critical.
Availability
LM2852YMXAX-2.5/NOPB is available at Aetrix Electronics and suitable for portable computing, industrial PLC I/O modules, medical sensor interfaces, and FPGA power delivery requiring stable component supply across multi-year production cycles.
Supply support for LM2852YMXAX-2.5/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 experience in high-reliability power conversion solutions.
The LM2852 product line delivers integrated synchronous buck regulators optimized for low-voltage, high-current point-of-load applications in space-constrained portable and industrial systems - emphasizing ease of use, thermal robustness, and production readiness.
FAQ
What is the output voltage tolerance of the LM2852YMXAX-2.5/NOPB over temperature?
The LM2852YMXAX-2.5/NOPB has a guaranteed output voltage tolerance of ±2.25% (2.4437 V to 2.5563 V) at TJ = 25°C. Over the full operating junction temperature range (–40°C to 125°C), the tolerance expands to ±2.5% due to internal DAC and reference drift. This is specified in Section 6.5 of the SNVS325E datasheet under "VOUT Voltage tolerance" for the 2.5-V option. The LM2852YMXAX-2.5/NOPB does not require external resistors to set this voltage, as it is factory-programmed into EEPROM.
Can the LM2852YMXAX-2.5/NOPB operate with PVIN lower than AVIN?
Yes - the LM2852YMXAX-2.5/NOPB is explicitly designed for split-rail operation where PVIN may be lower than AVIN, as long as PVIN ≤ AVIN and both meet their respective minimums (PVIN ≥ 1.5 V, AVIN ≥ 2.85 V). Section 7.3.1 confirms PVIN powers the power FETs while AVIN powers the control logic, enabling independent optimization. The LM2852YMXAX-2.5/NOPB datasheet specifies that for PVIN < 3.3 V, output filter component values recommended for 3.3 V should be used. This capability is unique to the LM2852YMXAX-2.5/NOPB among fixed-output 2.5 V buck regulators in its class.
What soft-start capacitor value is recommended for the LM2852YMXAX-2.5/NOPB?
A 2.7 nF ceramic capacitor is the recommended soft-start capacitor for the LM2852YMXAX-2.5/NOPB, yielding ~3 ms startup time. This value is derived from the internal 400 kΩ soft-start resistor (RSS) and the RC time constant (τ = R × C), where three τ periods achieve 95% of final output. The datasheet restricts CSS to 1–50 nF (Section 8.2.2.3) to ensure controlled startup and graceful recovery from faults like short circuits. Using 2.7 nF ensures the LM2852YMXAX-2.5/NOPB avoids current-limit startup and meets typical system sequencing requirements.
Does the LM2852YMXAX-2.5/NOPB require external compensation components?
No - the LM2852YMXAX-2.5/NOPB integrates a complete type-three compensation network internally, eliminating all external compensation components. This is confirmed in Section 7.1 ("Integration of the PWM controller, power switches and compensation network greatly reduces the component count") and Section 8.2.2.4 ("The compensation of the LM2852, which is type-three, is included on-chip"). While output filter L and C values must stay within ranges in Table 1 to maintain stability, no resistors, capacitors, or op-amps are needed on the LM2852YMXAX-2.5/NOPB board for loop compensation.
How does the LM2852YMXAX-2.5/NOPB handle thermal overload?
The LM2852YMXAX-2.5/NOPB activates thermal shutdown at TJ = 165°C with 10°C hysteresis (TSD-HYS), per Section 6.5. When junction temperature exceeds 165°C, the device halts switching and holds output in regulation until temperature falls to 155°C, then resumes normal operation. This protection is independent of load or input conditions and relies on on-die thermal sensing. The HTSSOP-14 package's RθJC(bot) = 1.7°C/W enables rapid heat transfer to the PCB, making the LM2852YMXAX-2.5/NOPB suitable for sustained 2 A loads in properly designed layouts.
LM2852YMXAX-2.5/NOPB 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:
- 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):
- 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/NOPB FAQ
1.How can I place an order for LM2852YMXAX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-2.5/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 LM2852YMXAX-2.5/NOPB reliable?
The price and inventory of LM2852YMXAX-2.5/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-2.5/NOPB transactions.
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4.How is shipping managed for LM2852YMXAX-2.5/NOPB?
LM2852YMXAX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-2.5/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 LM2852YMXAX-2.5/NOPB?
For technical support, including LM2852YMXAX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-2.5/NOPB requirements.
6.How does Aetrix verify that LM2852YMXAX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-2.5/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 LM2852YMXAX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-2.5/NOPB?
All LM2852YMXAX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-2.5/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 LM2852YMXAX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXAX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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