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Texas Instruments LM2852YMXA-1.8/NOPB
- Part No.:
- LM2852YMXA-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.8/NOPB.pdf
- Description:
- IC REG BUCK 1.8V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:157
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Product details
Overview
LM2852YMXA-1.8/NOPB from Texas Instruments is a 2 A synchronous buck DC-DC regulator with fixed 1.8 V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, and internal 60 mΩ MOSFET switches-designed for FPGA core power in portable computing and networking infrastructure.
For engineers reviewing the LM2852YMXA-1.8/NOPB datasheet, LM2852YMXA-1.8/NOPB pinout, LM2852YMXA-1.8/NOPB application, or LM2852YMXA-1.8/NOPB equivalent, key selection criteria include verified 1.8 V factory-programmed output, HTSSOP-14 thermal performance (RθJA = 39.2°C/W), soft-start capacitor compatibility (1–50 nF), and confirmed 2 A continuous load capability at 125°C junction temperature.
Technical Context
The LM2852YMXA-1.8/NOPB implements voltage-mode control with integrated type-three compensation, eliminating external compensation components. Its split-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized efficiency across input ranges while maintaining strict 1.8 V output regulation (±2.025% over –40°C to 125°C).
Switch node protection logic prevents abnormal operation during no-load or light-load conditions, and internal UVLO (2.85 V rising threshold) ensures reliable startup. Thermal shutdown activates at 165°C with 10°C hysteresis, and the exposed-pad HTSSOP-14 package delivers RθJC(bot) = 1.7°C/W for direct PCB heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.025% (factory EEPROM-programmed; no external feedback required) |
| Max Output Current | 2 A continuous (supports FPGA/DSP core loads without derating up to TJ = 125°C) |
| Switching Frequency | 500 kHz (LM2852Y variant; enables compact 10–15 µH inductors and 100 µF output capacitance) |
| Input Voltage Range | 2.85 V to 5.5 V (PVIN); AVIN independently supports 2.85 V to 5.5 V for flexible bias rail design) |
| Efficiency | Up to 94% at 1 A, 3.3 VIN → 1.8 VOUT (enables thermally constrained portable designs) |
| Quiescent Current | 0.85 mA (non-switching, TJ = 25°C); 10 µA shutdown current (EN = 0 V) |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14 with standard 2-layer board; enables >1.5 W dissipation without forced air) |
Pinout & Package
LM2852YMXA-1.8/NOPB uses the 14-pin HTSSOP (PWP) package with exposed thermal pad (5.00 mm × 4.40 mm nominal body size), requiring solder connection of the exposed pad to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; may be tied to PVIN or separate low-noise rail (2.85–5.5 V) |
| EN (Pin 2) | Enable control | Internally pulled up; connect to GND to disable (10 µA shutdown current); floating or AVIN enables operation |
| SGND (Pin 3) | Signal ground reference | Reference for error amplifier and SNS pin; must be routed separately from PGND to avoid noise coupling |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor to control output ramp time; internal 400 kΩ resistor sets RC time constant |
| PVIN (Pins 6, 7) | Main power input | Supplies internal PFET/NFET switches; requires low-ESR bulk capacitor placed adjacent to pins |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; must connect directly to load point to compensate for IR drop in output traces |
| SW (Pins 8, 9) | Power switch node | Drives external inductor; high di/dt path requiring short, wide copper traces and minimized loop area |
| PGND (Pins 10, 11) | Power ground return | Return path for high-current switch and inductor; must tie to thermal pad and low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.8 V output | Eliminates external resistor divider; guarantees ±2.025% tolerance over full temperature and line range |
| Integrated type-three compensation | Removes need for external compensation network-reduces BOM count and layout sensitivity |
| Split-rail AVIN/PVIN operation | Allows independent optimization of logic bias and power stage rails, improving efficiency at low PVIN |
| Internal 60 mΩ MOSFET switches | Enables 2 A continuous output without external FETs; reduces solution size and gate-drive complexity |
| Switch node protection logic | Prevents false triggering under no-load conditions by disabling switching until load demand is detected |
Applications
| Portable Computing Core Power | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM-based SoC cores in ultrabooks and tablets where input is 3.3 V or 5 V battery-derived rail. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1.8 V to processor VDDCORE with fast transient response. Use Value: 94% peak efficiency at 1 A reduces thermal load on compact PCBs; 500 kHz switching allows use of low-profile 15 µH inductors. | Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs with tight voltage tolerance requirements. IC Role / Device Role / Timing Role: Dedicated 1.8 V rail generator with SNS pin connected directly to FPGA VCCIO pins for accurate remote sensing. Use Value: ±2.025% output accuracy meets FPGA I/O spec; soft-start (2.7 nF CSS) prevents inrush-induced system reset. |
| Broadband Router PHY Power | Industrial PLC Digital I/O Module |
Use Scenario: Powering Ethernet PHY transceivers (e.g., DP83848) in enterprise-grade routers operating from 5 V backplane. IC Role / Device Role / Timing Role: Secondary buck stage stepping 5 V down to 1.8 V for PHY analog/digital supplies with low noise and high PSRR. Use Value: Internal compensation ensures stability with 100 µF tantalum output caps; RθJA = 39.2°C/W sustains 2 A load in sealed chassis. | Use Scenario: Providing isolated 1.8 V logic supply for microcontroller-based digital I/O modules in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Robust local regulator tolerant of 40 V load-dump transients on upstream 5 V rail (with external TVS protection). Use Value: UVLO (2.85 V) prevents brownout operation; thermal shutdown (165°C) protects against enclosure overheating in unventilated enclosures. |
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 | 1.8 V fixed, 3 MHz switching, 0.6 A max output, 2.05 V min input | Lower current rating; suited for ultra-compact, low-power MCU rails-not FPGA/core loads | Select when board space is critical and load ≤0.6 A; not suitable for 2 A applications. |
| LMZ10501SILT | 1.8 V fixed, integrated inductor, 1 A max output, 2.7–5.5 V input | Module-based solution with lower thermal resistance but higher cost and larger footprint than HTSSOP | Choose when design schedule prohibits inductor selection/validation; not drop-in compatible with LM2852YMXA-1.8/NOPB layout. |
Compared with TPS62231DRVR and LMZ10501SILT, LM2852YMXA-1.8/NOPB uniquely balances 2 A capability, 500 kHz switching, and HTSSOP-14 thermal performance-making it optimal for mid-power FPGA and SoC core applications where efficiency, size, and cost must coexist.
Availability
LM2852YMXA-1.8/NOPB is available at Aetrix Electronics and suitable for portable computing, FPGA power delivery, and broadband infrastructure applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2852YMXA-1.8/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 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 point-of-load applications in space-constrained systems-designed to reduce external component count while maintaining precision output regulation and thermal robustness.
FAQ
What is the factory-programmed output voltage of the LM2852YMXA-1.8/NOPB?
The LM2852YMXA-1.8/NOPB has a factory-programmed fixed output voltage of 1.8 V, with guaranteed tolerance of ±2.025% over –40°C to 125°C junction temperature and full input voltage range. This eliminates the need for external feedback resistors and ensures consistent regulation without calibration.
Does the LM2852YMXA-1.8/NOPB require external compensation components?
No, the LM2852YMXA-1.8/NOPB integrates a complete type-three compensation network internally. This removes all external compensation components, simplifies design, and ensures stable operation with recommended output filter values (e.g., 10–15 µH inductor and 100 µF capacitor for 1.8 V output).
What is the maximum continuous output current supported by the LM2852YMXA-1.8/NOPB?
The LM2852YMXA-1.8/NOPB supports up to 2 A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Peak current limit is 3.0 A typical at 25°C, de-rating to 2.25 A minimum over full temperature range.
How does the split-rail operation (AVIN vs. PVIN) benefit LM2852YMXA-1.8/NOPB designs?
Split-rail operation allows AVIN to power internal logic (2.85–5.5 V) independently from PVIN (2.85–5.5 V) that drives the power FETs. This enables optimization-e.g., using a clean 3.3 V AVIN for low-noise control while running PVIN from a higher-current 5 V rail-improving overall efficiency and noise immunity in mixed-signal systems.
What soft-start capacitor value is recommended for the LM2852YMXA-1.8/NOPB?
A 2.7 nF ceramic capacitor is the recommended soft-start capacitor (CSS) for the LM2852YMXA-1.8/NOPB, yielding ~3 ms startup time. The device supports 1–50 nF range; values outside this band risk unstable startup or failure to meet fault recovery requirements per TI's validated design guidelines.
LM2852YMXA-1.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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):
- 1.8V
- 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
LM2852YMXA-1.8/NOPB FAQ
1.How can I place an order for LM2852YMXA-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-1.8/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 LM2852YMXA-1.8/NOPB reliable?
The price and inventory of LM2852YMXA-1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.8/NOPB?
LM2852YMXA-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-1.8/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 LM2852YMXA-1.8/NOPB?
For technical support, including LM2852YMXA-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.8/NOPB requirements.
6.How does Aetrix verify that LM2852YMXA-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-1.8/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 LM2852YMXA-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.8/NOPB?
All LM2852YMXA-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-1.8/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 LM2852YMXA-1.8/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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