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Texas Instruments LM2852YMXAX-1.0
- Part No.:
- LM2852YMXAX-1.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-1.0.pdf
- Description:
- IC REG BUCK 1V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
LM2852YMXAX-1.0 from Texas Instruments is a 2A synchronous buck regulator with fixed 1.0V output, 500kHz 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 FPGA core power in portable computing systems.
For engineers reviewing the LM2852YMXAX-1.0 datasheet, LM2852YMXAX-1.0 pinout, LM2852YMXAX-1.0 application, or LM2852YMXAX-1.0 equivalent, key selection criteria include output voltage accuracy (±2.25% over temperature), thermal shutdown at 165°C, low 10µA shutdown current, and HTSSOP-14 exposed-pad package for high-power-density point-of-load designs.
Technical Context
The LM2852YMXAX-1.0 uses voltage-mode PWM control with internal oscillator set to 500kHz (±25% over temperature). Its integrated type-three compensation network eliminates external compensation components, enabling stable operation with 6.8–15µH inductors and 68–120µF output capacitors.
It features separate AVIN (bias logic) and PVIN (power FET supply) rails, allowing split-rail operation where PVIN ≤ AVIN. The device implements cycle-by-cycle peak current limiting (3.0A typical), UVLO with 85mV hysteresis, and switch-node protection that disables switching under no-load conditions until load is applied.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0V ±2.25% over −40°C to +125°C junction temperature |
| Max Output Current | 2A continuous; peak current limit 3.0A ensures safe startup into heavy loads |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range but must not exceed AVIN |
| Switching Frequency | 500kHz nominal (325–625kHz over temperature); enables compact magnetics and EMI filtering |
| Quiescent Current | 2mA typical in active mode; 10µA in shutdown-critical for battery-backed systems |
| Thermal Shutdown | Activates at 165°C with 10°C hysteresis; protects against sustained overload or poor heatsinking |
| Package Thermal Resistance | θJA = 38°C/W; exposed pad must be soldered to PCB ground plane for rated performance |
Pinout & Package
LM2852YMXAX-1.0 is housed in a 14-pin HTSSOP package (PWP0014A) with exposed thermal pad. The package measures 5.0mm × 6.4mm × 1.2mm and requires Type-1 MSL handling (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥ PVIN and within 2.85–5.5V |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for enable |
| SGND (3) | Signal ground reference | Reference for error amplifier and soft-start; separate from PGND to reduce noise coupling |
| SS (4) | Soft-start timing node | Connects to 1–50nF capacitor; sets output ramp time via internal 400kΩ resistor |
| NC (5,12,13) | No-connect | Must be left floating or tied to GND; no internal connection |
| PVIN (6,7) | Main power input | Supplies internal PFET source; high-current path requiring low-inductance layout |
| SW (8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace routing |
| PGND (10,11) | Power ground return | Return path for PFET/NFET currents; connect directly to large copper pour |
| SNS (14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate regulation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 60mΩ PFET and 45mΩ NFET enable >90% efficiency at 2A with minimal external components |
| Factory-set output | 1.0V output trimmed at wafer test-no external resistors required for precision regulation |
| Type-three compensation | On-chip compensation eliminates external RC network, reducing BOM count and layout sensitivity |
| Split-rail operation support | Independent AVIN/PVIN inputs allow optimized bias and power rail sequencing in multi-rail systems |
| Low-noise soft-start | Capacitor-controlled ramp prevents inrush current and reduces EMI during power-up |
Applications
| Portable Computing Power | FPGA Core Supply |
|---|---|
Use Scenario: Powering ARM-based SoC cores in tablets and ultrabooks with dynamic voltage scaling. IC Role / Device Role / Timing Role: Primary 1.0V point-of-load regulator delivering up to 2A with fast transient response. Use Value: Enables compliance with Intel IMVP-7/8 low-voltage core requirements while maintaining >92% efficiency at 1.5A load. | Use Scenario: Supplying configurable logic blocks in Xilinx Artix-7 and Intel Cyclone V FPGAs. IC Role / Device Role / Timing Role: Dedicated core voltage regulator with tight DC accuracy and low noise for logic stability. Use Value: Meets FPGA core voltage tolerance (±3%) across temperature with <8mV/A load regulation. |
| Broadband Networking | DSP Local Regulation |
Use Scenario: Providing clean 1.0V supply to Ethernet PHYs and packet processors in enterprise switches. IC Role / Device Role / Timing Role: Secondary regulator downstream of intermediate bus converters in distributed power architecture. Use Value: Delivers 2A with <10mV p-p output ripple at 500kHz, minimizing jitter in high-speed SerDes links. | Use Scenario: Powering TI C6000 DSP cores in medical imaging and radar signal processing modules. IC Role / Device Role / Timing Role: Low-quiescent-current regulator supporting deep-sleep modes between signal bursts. Use Value: Achieves 10µA shutdown current and <2mA operating IQ, extending battery life in portable diagnostics. |
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 | 3MHz switching frequency, 1.0V fixed output, 0.6A max load, 1.2mm × 1.6mm DSBGA | Targeted at ultra-compact, low-current applications; lacks split-rail AVIN/PVIN and thermal shutdown hysteresis | Select when board space is constrained and load <0.6A; not suitable for 2A FPGA core use. |
| MP2143GJ-Z | 2A, 1.0V fixed, 2MHz operation, QFN-10 package, no internal compensation | Requires external compensation components; higher EMI due to 2MHz switching; no soft-start capacitor option | Choose only if higher frequency is mandatory and design team has loop compensation expertise. |
Compared with TPS62231DRVR and MP2143GJ-Z, the LM2852YMXAX-1.0 delivers full 2A capability with integrated compensation, soft-start control, and robust thermal protection-making it uniquely suited for thermally demanding, medium-power FPGA and SoC core applications without design iteration overhead.
Availability
LM2852YMXAX-1.0 is available at Aetrix Electronics and suitable for portable computing, FPGA power delivery, and broadband networking infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2852YMXAX-1.0 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 power conversion expertise.
The LM2852YMXAX-1.0 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for high-efficiency, low-component-count DC-DC conversion in space-constrained, thermally demanding point-of-load applications.
FAQ
What is the output voltage tolerance of the LM2852YMXAX-1.0 over temperature?
The LM2852YMXAX-1.0 has a guaranteed output voltage tolerance of ±2.25% across the full operating junction temperature range of −40°C to +125°C. This specification is ensured by factory trimming and applies to the fixed 1.0V output version without external feedback resistors. Typical deviation at 25°C is ±1.25%, and the device maintains this accuracy under line and load transients per its electrical characteristics table.
Does the LM2852YMXAX-1.0 require external compensation components?
No, the LM2852YMXAX-1.0 does not require external compensation components. It integrates a complete type-three compensation network on-die, eliminating the need for external resistors or capacitors in the feedback loop. This simplifies design, improves reliability, and ensures stability with recommended output filter components (e.g., 6.8–15µH inductor and 68–120µF capacitor), as validated in TI's application notes and SPICE models.
Can the LM2852YMXAX-1.0 operate with separate AVIN and PVIN supplies?
Yes, the LM2852YMXAX-1.0 supports split-rail operation: AVIN powers the control logic (2.85–5.5V), while PVIN supplies the power FETs (also 2.85–5.5V). PVIN must never exceed AVIN. This allows independent sequencing-for example, enabling AVIN first to initialize logic before applying PVIN to avoid shoot-through-and improves efficiency in systems with dedicated bias rails.
What is the purpose of the SNS pin on the LM2852YMXAX-1.0?
The SNS (sense) pin on the LM2852YMXAX-1.0 is the high-impedance feedback node for the output voltage regulation loop. It connects directly to the load-side of the output capacitor to compensate for IR drop in PCB traces and ensure accurate voltage delivery at the load. Routing the SNS trace away from noisy nodes like SW is critical; TI specifies ≤10mΩ trace resistance between SNS and load for optimal regulation accuracy.
How does the LM2852YMXAX-1.0 handle no-load or light-load conditions?
The LM2852YMXAX-1.0 enters a low-power pulse-skipping mode under light load, reducing switching frequency to maintain regulation while minimizing quiescent current. At zero load, the switch node may appear inactive until a minimum load (~50mA) is applied-this is intentional behavior driven by switch-node protection circuitry to prevent instability. Once loaded, normal PWM operation resumes immediately with full 500kHz switching.
LM2852YMXAX-1.0 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):
- 1V
- 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-1.0 FAQ
1.How can I place an order for LM2852YMXAX-1.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-1.0 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-1.0 reliable?
The price and inventory of LM2852YMXAX-1.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXAX-1.0 is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-1.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-1.0 transactions.
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4.How is shipping managed for LM2852YMXAX-1.0?
LM2852YMXAX-1.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-1.0 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-1.0?
For technical support, including LM2852YMXAX-1.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-1.0 requirements.
6.How does Aetrix verify that LM2852YMXAX-1.0 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-1.0 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-1.0 meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-1.0?
All LM2852YMXAX-1.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-1.0, 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-1.0 part is unused and in its original packaging.
Return procedure for LM2852YMXAX-1.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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