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Texas Instruments LM2852YMXA-1.5/NOPB
- Part No.:
- LM2852YMXA-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.5/NOPB.pdf
- Description:
- IC REG BUCK 1.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:173
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Product details
Overview
LM2852YMXA-1.5/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 1.5V output, 500 kHz switching frequency, 2.85–5.5V input range, internal 60-mΩ MOSFETs, and voltage-mode control. It delivers point-of-load power to FPGA/DSP core rails in space-constrained industrial and portable computing systems.
For engineers reviewing the LM2852YMXA-1.5/NOPB datasheet, LM2852YMXA-1.5/NOPB pinout, LM2852YMXA-1.5/NOPB application, or LM2852YMXA-1.5/NOPB equivalent, key selection criteria include verified 500 kHz operation, factory-programmed 1.5V output tolerance (±1.7%), thermal performance in HTSSOP-14, soft-start capacitor interface (CSS), and split-rail AVIN/PVIN capability.
Technical Context
The LM2852YMXA-1.5/NOPB implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized efficiency across input ranges while maintaining strict output regulation under load transients up to 2A.
Switch node protection logic prevents shoot-through during startup or light-load conditions, and thermal shutdown activates at 165°C with 10°C hysteresis. The device supports soft-start via external CSS capacitor (1–50 nF), with typical 3 ms ramp time using 2.7 nF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±1.7% (0.0255 V tolerance at 25°C) |
| Max Output Current | 2 A continuous - supports FPGA core loads without external current boosting |
| Input Voltage Range | 2.85 V to 5.5 V - compatible with single-cell Li-ion, 3.3V, and 5V system rails |
| Switching Frequency | 500 kHz - enables compact 10–15 µH inductors and 100–120 µF ceramic/tantalum output capacitors |
| Efficiency @ 1.5V/2A | 90% at PVIN = 3.3 V - reduces thermal load in sealed enclosures |
| Quiescent Current | 0.85 mA (non-switching) - extends battery life in always-on subsystems |
| Shutdown Current | 10 µA - meets ultra-low-power standby requirements |
Pinout & Package
LM2852YMXA-1.5/NOPB uses the 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad for enhanced heat dissipation. Pin numbering follows top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥ PVIN and ≤ 5.5 V |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; no external pullup required |
| SGND (Pin 3) | Signal ground reference | Separate from PGND to minimize noise coupling into feedback path |
| SS (Pin 4) | Soft-start timing | Connects to CSS capacitor (e.g., 2.7 nF) to control output ramp rate |
| NC (Pins 5, 12, 13) | No connect | Must be left floating or tied to GND - no electrical function |
| PVIN (Pins 6, 7) | Power FET supply | Drives high-side/low-side MOSFETs; connects directly to input bulk capacitor |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node - route trace directly to load for accurate regulation |
| PGND (Pins 10, 11) | Power ground return | Carries high-switching-current return path; connect to thermal pad and low-impedance plane |
| SW (Pins 8, 9) | Switch node | Connects to inductor; high dv/dt node - minimize trace length and loop area |
Key Features
| Feature | Design Value |
|---|---|
| Internal Type-Three Compensation | Eliminates external compensation network - reduces BOM count and layout sensitivity |
| Split-Rail AVIN/PVIN Operation | Enables independent optimization of logic bias and power stage - improves efficiency at low VIN |
| Factory-Programmed Output | 1.5V option guaranteed over temperature - avoids external resistor networks or EEPROM programming |
| Switch Node Protection | Prevents abnormal switching during no-load or fault conditions - enhances system reliability |
| Exposed Thermal Pad (HTSSOP) | RθJC(bot) = 1.7 °C/W - enables >1.5W power dissipation without external heatsink |
Applications
| Low-Voltage FPGA Core Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powers 1.5V core rail of Xilinx Spartan-7 FPGA in a DIN-rail mounted controller with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 1.5V at up to 2A with tight load transient response. Use Value: Internal MOSFETs and 500 kHz switching enable small 12 µH inductor + 100 µF output capacitor footprint, reducing PCB area by 35% vs discrete solutions. | Use Scenario: Supplies isolated 1.5V logic for analog-to-digital converter (ADC) front-end in a 24V-powered programmable logic controller. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling ADC reference and digital core from noisy 24V bus. Use Value: 10 µA shutdown current and −40°C to 125°C junction rating ensure reliable operation in unventilated enclosures. |
| Portable Medical Sensor Hub | 5G Small Cell Baseband Processor |
Use Scenario: Powers ARM Cortex-M7 microcontroller and MEMS sensor interface in battery-operated wearable diagnostic device. IC Role / Device Role / Timing Role: Main system regulator operating from 3.7V Li-ion cell; manages dynamic load steps during sensor burst sampling. Use Value: 90% peak efficiency at 2A and 0.85 mA quiescent current extend runtime by 18% versus comparable 1.2 MHz alternatives. | Use Scenario: Provides 1.5V core voltage to Qualcomm QDM4270 baseband SoC in outdoor small cell unit with thermal cycling from −30°C to +75°C. IC Role / Device Role / Timing Role: High-reliability POL regulator with thermal shutdown and UVLO hysteresis for mission-critical RF processing. Use Value: RθJA = 39.2 °C/W and 165°C thermal shutdown protect against airflow loss or dust accumulation in sealed housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.5V fixed, 3 MHz switching, 0.6–5.5V input, 0.6A max - higher frequency but lower current rating | Best for ultra-compact, low-current apps where size > current capacity | Select if board space is constrained and load < 0.6A; not suitable for 2A FPGA cores |
| LM2678SD-1.5/NOPB | 1.5V fixed, 63 kHz, 8–40V input, 5A max - wider VIN, lower frequency, larger inductor | Designed for industrial 24V input systems requiring higher current and ruggedness | Choose for 24V input environments; incompatible with 3.3V/5V rails due to minimum VIN = 8V |
Compared with TPS62231DRVR and LM2678SD-1.5/NOPB, LM2852YMXA-1.5/NOPB uniquely balances 2A capability, 500 kHz frequency, and 2.85V minimum input - making it optimal for 3.3V/5V-powered embedded systems needing moderate current and thermal efficiency.
Availability
LM2852YMXA-1.5/NOPB is available at Aetrix Electronics and suitable for FPGA core supplies, industrial PLC modules, portable medical sensors, and 5G baseband processors requiring stable component supply and long-term production continuity.
Supply support for LM2852YMXA-1.5/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 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- and thermally constrained point-of-load applications, emphasizing simplified design through internal compensation and factory-set outputs.
FAQ
What is the output voltage accuracy of LM2852YMXA-1.5/NOPB over temperature?
The LM2852YMXA-1.5/NOPB guarantees a 1.5V output with ±1.7% tolerance (±25.5 mV) across the full operating junction temperature range of −40°C to 125°C. At 25°C, typical deviation is ±0.85%, and line regulation remains within 0.2% at nominal AVIN. This accuracy is factory-trimmed and does not require external calibration - critical for stable FPGA core operation.
Can LM2852YMXA-1.5/NOPB operate with PVIN = 3.3V and AVIN = 5V simultaneously?
Yes, LM2852YMXA-1.5/NOPB supports true split-rail operation: PVIN can be set to 3.3V (powering the internal MOSFETs) while AVIN is independently supplied at 5V (biasing control circuitry). PVIN must never exceed AVIN. This configuration improves efficiency at low input voltages and isolates noise-sensitive logic from high-current power paths - a key advantage confirmed in TI's SNVS325E datasheet Section 7.3.1.
What soft-start capacitor value is recommended for LM2852YMXA-1.5/NOPB?
A 2.7 nF ceramic capacitor (e.g., Vishay VJ0805Y272KXXA) is the standard soft-start capacitor for LM2852YMXA-1.5/NOPB, yielding ~3 ms output ramp time. The device supports CSS values from 1 nF to 50 nF; values outside this range may cause startup instability or violate internal timing constraints. This value is validated in TI's typical application schematic (Figure 12) and Bill of Materials Table 4.
Does LM2852YMXA-1.5/NOPB require external compensation components?
No, LM2852YMXA-1.5/NOPB integrates a complete type-three compensation network on-die, eliminating the need for external resistors or capacitors in the feedback loop. This simplifies layout, reduces component count, and ensures stability across the recommended output capacitor (100–120 µF) and inductor (10–15 µH) ranges specified in Table 1 of the datasheet - a defining feature of the LM2852 family.
How does the thermal performance of LM2852YMXA-1.5/NOPB compare in HTSSOP-14?
LM2852YMXA-1.5/NOPB in HTSSOP-14 achieves RθJC(bot) = 1.7 °C/W and RθJA = 39.2 °C/W with standard 2-layer PCB layout. The exposed thermal pad must be soldered to a solid copper pour for optimal conduction. At 2A load and 3.3V input, junction temperature rise is typically <45°C - well below the 125°C maximum, enabling reliable operation without forced air cooling in most embedded designs.
LM2852YMXA-1.5/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):
- 1.5V
- 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
LM2852YMXA-1.5/NOPB FAQ
1.How can I place an order for LM2852YMXA-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-1.5/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 LM2852YMXA-1.5/NOPB reliable?
The price and inventory of LM2852YMXA-1.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.5/NOPB?
LM2852YMXA-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-1.5/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 LM2852YMXA-1.5/NOPB?
For technical support, including LM2852YMXA-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.5/NOPB requirements.
6.How does Aetrix verify that LM2852YMXA-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-1.5/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 LM2852YMXA-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.5/NOPB?
All LM2852YMXA-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-1.5/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 LM2852YMXA-1.5/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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