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Texas Instruments LM2852YMXA-1.0/NOPB
- Part No.:
- LM2852YMXA-1.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.0/NOPB.pdf
- Description:
- IC REG BUCK 1V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,251
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Product details
Overview
LM2852YMXA-1.0/NOPB from Texas Instruments is a 2 A synchronous buck regulator with fixed 1.0 V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ MOSFETs, and voltage-mode control. It delivers point-of-load regulation for FPGA core supplies in portable computing and broadband infrastructure.
For engineers reviewing the LM2852YMXA-1.0/NOPB datasheet, LM2852YMXA-1.0/NOPB pinout, LM2852YMXA-1.0/NOPB application, or LM2852YMXA-1.0/NOPB equivalent, key selection criteria include factory-programmed 1.0 V output, HTSSOP-14 thermal performance, soft-start capacitor interface (CSS), and split-rail AVIN/PVIN operation.
Technical Context
The LM2852YMXA-1.0/NOPB implements voltage-mode PWM control with internal type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized input filtering and thermal management.
Switch node protection logic disables switching under no-load or light-load conditions until output loading triggers normal regulation-ensuring safe startup and preventing false fault detection. The device integrates UVLO (2.85 V rising threshold), thermal shutdown (165 °C), and peak current limiting (2.25–3.65 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±2.25% (0.9775 V to 1.0225 V), factory EEPROM-programmed for stable core rail generation. |
| Max Output Current | 2 A continuous load capability with integrated 75 mΩ PFET and 55 mΩ NFET at 25 °C-supports FPGA/DSP core power without external switches. |
| Switching Frequency | 500 kHz (±37.5 kHz over temperature), enabling compact magnetics and predictable EMI profile for industrial PCB layouts. |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN must be ≤ AVIN-supports single-supply or split-rail configurations with Li-ion, USB, or 3.3 V/5 V system rails. |
| Quiescent Current | 0.85 mA typical non-switching IQ; 10 µA shutdown current-enables low-power standby modes in battery-powered systems. |
| Thermal Resistance | RθJA = 39.2 °C/W (HTSSOP-14 exposed pad)-requires minimal copper area for 2 A operation at 125 °C junction temperature. |
Pinout & Package
LM2852YMXA-1.0/NOPB uses a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Powers internal logic; must be ≥ PVIN and within 2.85–5.5 V-decoupling critical for reference stability. |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable-no external pullup required for default-enable operation. |
| SGND (Pin 3) | Signal ground reference | Separate from PGND to minimize noise coupling into error amplifier and SNS feedback path. |
| SS (Pin 4) | Soft-start timing | Connects to external capacitor (1–50 nF); sets controlled ramp time for output voltage-prevents inrush current and overshoot. |
| NC (Pins 5, 12, 13) | No connect | Must be left floating or tied to GND; no internal connection-no routing or thermal impact. |
| PVIN (Pins 6, 7) | Power FET supply | Drives high-side and low-side MOSFETs; connects directly to input bulk capacitor-low-inductance layout mandatory. |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate regulation-avoid routing near SW or PGND. |
| PGND (Pins 10, 11) | Power ground return | Carries high di/dt switch currents; must connect to large internal ground plane-separate from SGND trace. |
| SW (Pins 8, 9) | Switch node | Connects to inductor; carries full switching waveform-minimize trace length and loop area to reduce EMI and losses. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Type-Three Compensation | Eliminates external compensation network-reduces BOM count and layout sensitivity while maintaining ≥45° phase margin across recommended L/C ranges. |
| Split-Rail AVIN/PVIN Operation | Enables independent optimization: AVIN powers control circuitry (low-noise), PVIN drives power stage (high-current)-improves efficiency and thermal distribution. |
| Factory-Programmed Output | 1.0 V output permanently set in EEPROM-no external resistor divider required, ensuring accuracy and eliminating calibration overhead. |
| Switch Node Protection Logic | Monitors SW voltage during startup; suppresses switching until load is applied-prevents unregulated output and false current-limit triggering under no-load conditions. |
| Exposed-Pad HTSSOP-14 Package | Thermal pad reduces RθJA by >30% vs standard HTSSOP-enables 2 A operation at ambient temperatures up to 85 °C without forced air. |
Applications
| Low-Voltage FPGA Core Supply | Portable Computing Power Rail |
|---|---|
Use Scenario: Powers 1.0 V I/O or core rail of Xilinx Spartan-7 or Intel MAX 10 FPGA in handheld test equipment. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 1.0 V at up to 2 A with <10 mV load transient deviation. Use Value: Internal MOSFETs and compensation eliminate 4 external components versus controller+MOSFET solutions-reducing board area by 25%. | Use Scenario: Supplies 1.0 V core voltage to ARM Cortex-A53 SoC in ruggedized tablet design operating from 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: High-efficiency buck regulator maintaining >90% efficiency at 1 A load with 3.3 V input. Use Value: 10 µA shutdown current extends battery runtime in sleep mode; SS pin enables synchronized power-up with PMIC sequencing. |
| Broadband Network PHY Power | Industrial Sensor Hub Regulation |
Use Scenario: Provides clean 1.0 V supply to 10G Ethernet PHY IC in optical line terminal (OLT) card with strict ripple requirements. IC Role / Device Role / Timing Role: Local point-of-load regulator with SNS pin connected directly to PHY VDD pins for <5 mV line/load regulation. Use Value: SGND/PGND separation and low 55 mΩ NFET RDS(on) limit output ripple to <10 mVpp at 500 kHz switching. | Use Scenario: Powers mixed-signal sensor fusion MCU (e.g., TI MSP432E4) in factory automation node requiring EMC robustness. IC Role / Device Role / Timing Role: Main 1.0 V supply with thermal shutdown (165 °C) and UVLO (2.85 V) for reliable operation in 85 °C ambient enclosures. Use Value: Exposed-pad HTSSOP package sustains 2 A continuous load at 85 °C ambient-no heatsink or airflow needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6286418RTER | 1.8 V fixed output, 4 A rating, 2.5 V–5.5 V input, 2.25 MHz switching-higher frequency, higher current, different VOUT. | Requires redesign for 1.0 V use; not drop-in compatible due to fixed 1.8 V output and different pinout. | Select only if upgrading to higher current or faster transient response is required; revalidate loop stability and layout. |
| MP2143GJ-Z | Adjustable 0.6–5.5 V output, 3 A rating, 2.5 V–5.5 V input, 500 kHz/1.5 MHz selectable-requires external feedback resistors. | Supports 1.0 V via resistor divider but adds 2 components and tolerance stack-up; lacks factory-programmed precision. | Choose when output voltage flexibility or higher current headroom is prioritized over BOM simplicity and guaranteed 1.0 V accuracy. |
Compared with TPS6286418RTER and MP2143GJ-Z, LM2852YMXA-1.0/NOPB offers guaranteed 1.0 V ±2.25% accuracy without external resistors, lower component count, and proven thermal performance in HTSSOP-14-making it optimal for cost-sensitive, space-constrained 2 A core rail designs.
Availability
LM2852YMXA-1.0/NOPB is available at Aetrix Electronics and suitable for FPGA core supplies, portable computing power rails, broadband network PHY regulation, and industrial sensor hub designs requiring stable component supply and long-term manufacturability.
Supply support for LM2852YMXA-1.0/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 expertise in high-reliability DC-DC conversion.
The LM2852 product line delivers compact, thermally optimized synchronous buck regulators for point-of-load applications in portable, networking, and industrial systems-designed to reduce design cycle time through integrated compensation and factory-set outputs.
FAQ
What is the output voltage tolerance of the LM2852YMXA-1.0/NOPB?
The LM2852YMXA-1.0/NOPB has a factory-programmed 1.0 V output with guaranteed tolerance of ±2.25% (0.9775 V to 1.0225 V) over –40 °C to 125 °C junction temperature. This specification is ensured by internal EEPROM calibration and applies under all recommended operating conditions-not dependent on external resistor matching or trimming.
Does the LM2852YMXA-1.0/NOPB require external compensation components?
No, the LM2852YMXA-1.0/NOPB integrates a complete type-three compensation network internally. This eliminates the need for external capacitors or resistors in the feedback loop, reducing BOM count and layout complexity while maintaining stable operation across its specified inductor and capacitor ranges.
How does the split-rail AVIN/PVIN architecture benefit LM2852YMXA-1.0/NOPB designs?
The LM2852YMXA-1.0/NOPB separates AVIN (logic bias) from PVIN (power FET supply), allowing independent optimization: AVIN can be filtered for low noise while PVIN handles high di/dt currents. This improves reference stability, reduces coupling between power and control paths, and enhances overall efficiency and thermal distribution.
What is the purpose of the SS (soft-start) pin on the LM2852YMXA-1.0/NOPB?
The SS pin on the LM2852YMXA-1.0/NOPB controls output voltage ramp rate via an external capacitor (1–50 nF). Charging this capacitor sets a controlled startup time-preventing inrush current, minimizing output overshoot, and avoiding false triggering of current-limit protection during power-up sequences.
Can the LM2852YMXA-1.0/NOPB operate with no load on its output?
Yes, the LM2852YMXA-1.0/NOPB regulates to 1.0 V under no-load conditions, but its switch node may remain inactive until load is applied due to built-in switch node protection logic. Once loaded, normal PWM switching resumes-ensuring safe startup and preventing uncontrolled behavior during idle states.
LM2852YMXA-1.0/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):
- 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
LM2852YMXA-1.0/NOPB FAQ
1.How can I place an order for LM2852YMXA-1.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-1.0/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-1.0/NOPB reliable?
The price and inventory of LM2852YMXA-1.0/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-1.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.0/NOPB?
LM2852YMXA-1.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-1.0/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-1.0/NOPB?
For technical support, including LM2852YMXA-1.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.0/NOPB requirements.
6.How does Aetrix verify that LM2852YMXA-1.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-1.0/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-1.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.0/NOPB?
All LM2852YMXA-1.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-1.0/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-1.0/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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