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Texas Instruments LM2852YMXAX-1.5
- Part No.:
- LM2852YMXAX-1.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-1.5.pdf
- Description:
- IC REG BUCK 1.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,306
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Product details
Overview
LM2852YMXAX-1.5 from Texas Instruments is a 2A synchronous buck regulator in HTSSOP-14 with exposed pad, operating at 500 kHz switching frequency, factory-set 1.5 V output, 2.85–5.5 V input range, and internal type-three compensation for minimal external components. It delivers stable point-of-load power to FPGA core rails and portable computing subsystems.
For engineers reviewing the LM2852YMXAX-1.5 datasheet, LM2852YMXAX-1.5 pinout, LM2852YMXAX-1.5 application, or LM2852YMXAX-1.5 equivalent, key selection criteria include its fixed 1.5 V output, 500 kHz frequency option, 2A load capability, thermal performance in HTSSOP-14, and compatibility with ceramic output capacitors down to 68 µF.
Technical Context
The LM2852YMXAX-1.5 implements voltage-mode PWM control with integrated 60 mΩ PMOS and 55 mΩ NMOS power switches, enabling high-efficiency step-down conversion without external drivers. Its internal type-three compensation network eliminates the need for external loop compensation components.
It features dedicated AVIN (bias rail) and PVIN (power rail) inputs, soft-start via external capacitor (2.7 nF typical), and precision output sensing via SNS pin routed close to the load. Thermal shutdown activates at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±1.2% over −40°C to +125°C junction temperature |
| Max Output Current | 2 A continuous load with thermal derating above 85°C ambient in standard layout |
| Switching Frequency | 500 kHz (±25% over temperature), enabling compact 10–15 µH inductors and <120 µF ceramic output caps |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN supports same range but must not exceed AVIN |
| Quiescent Current | 2 mA during operation; 10 µA in shutdown (EN = 0 V) |
| Efficiency @ 3.3 VIN/1.5 VOUT | 92% at 1 A load, confirming suitability for battery-powered and thermally constrained applications |
| Thermal Resistance θJA | 38°C/W with standard 2-layer PCB and full exposed-pad soldering to ground plane |
Pinout & Package
LM2852YMXAX-1.5 is housed in a 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed thermal pad, optimized for thermal dissipation and board-level EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥2.85 V and ≥PVIN; decoupling required |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; logic-high threshold is 75% of AVIN |
| SGND (3) | Signal ground reference | Return for error amplifier, soft-start, and sense circuitry; separate from PGND in layout |
| SS (4) | Soft-start timing node | Connects to 2.7 nF capacitor to set ~3 ms startup time; restrict to 1–50 nF range |
| NC (5, 12, 13) | No-connect terminals | Must be left floating or tied to GND; no internal connection |
| PVIN (6, 7) | Main power input | Supplies internal PMOS switch source; high-current path requiring low-inductance layout |
| SNS (14) | Output voltage feedback | High-impedance sense input; connect directly to load for accurate regulation under load transients |
| SW (8, 9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and EMI-aware routing |
| PGND (10, 11) | Power ground return | Return path for NMOS switch and inductor current; connect to large copper pour or internal ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.5 V output | Eliminates external resistor divider, reducing BOM count and improving long-term output stability |
| Integrated 60 mΩ PMOS / 55 mΩ NMOS switches | Enables >92% efficiency at 1 A without external MOSFETs or gate drivers |
| Internal type-three compensation | Removes need for external compensation network, simplifying design and validation |
| Separate AVIN and PVIN supplies | Allows optimization of bias rail (e.g., clean LDO) independent of noisy input bus |
| Exposed thermal pad (HTSSOP-14) | Reduces θJA by ~25% vs non-exposed packages, supporting 2 A continuous in compact layouts |
Applications
| FPGA Core Power | DSP Local Regulation |
|---|---|
Use Scenario: Powering 1.5 V I/O or auxiliary rails in Xilinx Spartan-7 or Intel MAX 10 FPGAs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 1.5 V at up to 2 A with fast transient response. Use Value: Meets FPGA VCCIO spec with <±1.2% tolerance across temperature and line, minimizing I/O timing skew. |
Use Scenario: Supplying 1.5 V core voltage to TI C674x DSPs in industrial motor control modules. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to DSP package for low-noise, low-impedance supply. Use Value: Achieves 92% efficiency at 1 A, reducing thermal load in sealed enclosures without heatsinks. |
| Portable Computing Subsystem | Broadband Modem PHY Power |
Use Scenario: Generating 1.5 V for USB 3.0 PHY or PCIe endpoint logic in handheld test equipment. IC Role / Device Role / Timing Role: Compact, high-frequency buck converter enabling small form factor and low EMI emissions. Use Value: 500 kHz operation allows use of 10 µH inductors and 100 µF ceramic output caps, saving board space vs lower-frequency alternatives. |
Use Scenario: Powering 1.5 V analog front-end (AFE) circuits in DOCSIS 3.1 cable modems. IC Role / Device Role / Timing Role: Low-noise, well-regulated supply for high-speed ADC/DAC biasing and clock conditioning. Use Value: Internal type-three compensation ensures stable loop response with low-ESR ceramic capacitors, critical for signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXAX-1.5 | 1.5 MHz switching frequency; requires smaller inductor (1–10 µH) and lower-capacitance output filter (10–100 µF) | Better suited for ultra-compact designs where board area is constrained, but increases switching losses above 1.5 A | Select when footprint reduction outweighs peak efficiency trade-off at >1 A loads |
| TPS62231DRYT | 3 MHz fixed-frequency, 2A buck with 1.5 V preset; 10 µA quiescent current; 2.05–6.0 V input range | Superior light-load efficiency and tighter output tolerance (±0.5%), but lacks separate AVIN/PVIN and internal compensation tuning | Prefer for battery-powered systems needing extended runtime and higher accuracy, accepting reduced thermal headroom |
Compared with LM2852XMXAX-1.5 and TPS62231DRYT, the LM2852YMXAX-1.5 offers optimal balance of thermal robustness (38°C/W), proven stability with standard ceramic capacitors, and simplified layout-making it ideal for industrial and communications applications where reliability and ease of qualification matter most.
Availability
LM2852YMXAX-1.5 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband modem PHY power requiring stable component supply, consistent lead times, and full RoHS-compliant traceability.
Supply support for LM2852YMXAX-1.5 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 power conversion solutions.
The LM2852YMXAX-1.5 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for rapid, low-risk DC-DC design in space-constrained, thermally demanding applications such as networking infrastructure and portable electronics.
FAQ
What is the output voltage tolerance of the LM2852YMXAX-1.5 over temperature and line?
The LM2852YMXAX-1.5 has a guaranteed output voltage tolerance of ±1.2% over the full operating junction temperature range (−40°C to +125°C) and input voltage range (2.85 V to 5.5 V), measured at the SNS pin in closed-loop configuration per the SNVS325D datasheet.
Can the LM2852YMXAX-1.5 operate with AVIN and PVIN supplied from different sources?
Yes-the LM2852YMXAX-1.5 supports split-rail operation: AVIN powers the control logic (minimum 2.85 V), while PVIN supplies the power switches (2.85 V to 5.5 V). PVIN must never exceed AVIN, and both rails require local decoupling per the layout guidelines in the LM2852YMXAX-1.5 datasheet.
What is the recommended soft-start capacitor value for the LM2852YMXAX-1.5?
The recommended soft-start capacitor for the LM2852YMXAX-1.5 is 2.7 nF, which yields approximately a 3 ms startup time. The datasheet restricts CSS to 1 nF–50 nF; values outside this range may cause unstable start-up or fault recovery behavior.
Does the LM2852YMXAX-1.5 require external compensation components?
No-the LM2852YMXAX-1.5 integrates a complete type-three compensation network, eliminating the need for external resistors or capacitors in the feedback loop. Stability is ensured when using output filter components within the ranges specified in Table 1 of the LM2852YMXAX-1.5 datasheet.
What package type and thermal characteristics does the LM2852YMXAX-1.5 use?
The LM2852YMXAX-1.5 uses the 14-pin HTSSOP package (PWP0014A) with exposed thermal pad. Its thermal resistance is θJA = 38°C/W when mounted on a standard 2-layer PCB with full soldering of the exposed pad to an internal ground plane.
LM2852YMXAX-1.5 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):
- 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
LM2852YMXAX-1.5 FAQ
1.How can I place an order for LM2852YMXAX-1.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-1.5 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-1.5 reliable?
The price and inventory of LM2852YMXAX-1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXAX-1.5 is usually 5 days.
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4.How is shipping managed for LM2852YMXAX-1.5?
LM2852YMXAX-1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-1.5 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-1.5?
For technical support, including LM2852YMXAX-1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-1.5 requirements.
6.How does Aetrix verify that LM2852YMXAX-1.5 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-1.5 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-1.5 meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-1.5?
All LM2852YMXAX-1.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-1.5, 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-1.5 part is unused and in its original packaging.
Return procedure for LM2852YMXAX-1.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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