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Texas Instruments LM2852YMXAX-3.3
- Part No.:
- LM2852YMXAX-3.3
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-3.3.pdf
- Description:
- IC REG BUCK 3.3V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,989
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Product details
Overview
LM2852YMXAX-3.3 from Texas Instruments is a 2A synchronous buck regulator in HTSSOP-14 package, operating at 500 kHz switching frequency with factory-set 3.3 V output, input voltage range 2.85–5.5 V, and internal 60 mΩ PMOS/NMOS power switches-designed for point-of-load regulation in FPGA core supplies.
For engineers reviewing the LM2852YMXAX-3.3 datasheet, LM2852YMXAX-3.3 pinout, LM2852YMXAX-3.3 application, or LM2852YMXAX-3.3 equivalent, key selection criteria include soft-start capacitor value (2.7 nF typical), thermal performance of exposed-pad HTSSOP, voltage-mode control loop stability, and compatibility with ceramic output capacitors down to 68 µF.
Technical Context
The LM2852YMXAX-3.3 implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its internal 60 mΩ PMOS high-side and 55 mΩ NMOS low-side switches enable high-efficiency operation across 0–2 A load range.
It features factory-programmed 3.3 V output (±2.23% tolerance over –40°C to +125°C), 10 µA shutdown current, and UVLO with 85–210 mV hysteresis. The 500 kHz fixed-frequency oscillator maintains ±37.5 kHz variation over temperature and input voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2.23% (factory-trimmed; ensures stable core rail without external feedback resistors) |
| Max Output Current | 2 A continuous (supports FPGA/DSP core loads without derating at TJ ≤ 125°C) |
| Input Voltage Range | 2.85 V to 5.5 V (compatible with single-cell Li-ion, 3.3 V, and 5 V system rails) |
| Switching Frequency | 500 kHz ±37.5 kHz (enables compact 10–15 µH inductors and reduces EMI vs 1.5 MHz variants) |
| Quiescent Current | 2 mA (non-switching; enables low-power standby in portable systems) |
| Shutdown Current | 10 µA (EN = 0 V; supports battery-backed always-on subsystems) |
| Thermal Resistance θJA | 38 °C/W (HTSSOP-14 with exposed pad; requires PCB copper pour for full 2 A capability) |
Pinout & Package
LM2852YMXAX-3.3 uses the 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation and electrical stability.
| 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 near pin |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; no external pull-up needed |
| SGND (3) | Signal ground reference | Separate from PGND; connects to error amplifier and sense circuitry for noise immunity |
| SS (4) | Soft-start timing node | Connects to 2.7 nF capacitor; sets ~3 ms startup time; limits inrush current into output capacitance |
| 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 PMOS switch source; high-current path requiring low-inductance layout |
| SNS (14) | Output voltage sense | Remote sensing input; connect directly to load for ±1% regulation accuracy under load transients |
| SW (8, 9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and EMI mitigation |
| PGND (10, 11) | Power ground return | High-current return path for both MOSFETs; must connect to large internal ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network; ensures stable loop response with recommended L/C/ESR ranges |
| Factory-Set Output Voltage | 3.3 V trimmed at wafer level; avoids resistor divider errors and saves board space |
| Exposed-Pad HTSSOP-14 Package | Reduces thermal resistance by >40% vs standard HTSSOP; enables full 2 A operation with minimal copper area |
| Voltage-Mode Control Architecture | Provides predictable transient response and simplified design vs current-mode; immune to subharmonic oscillation |
| Low Standby Quiescent Current | 10 µA shutdown current extends battery life in always-on applications such as real-time clocks or sensor hubs |
Applications
| FPGA Core Power Supply | DSP Local Regulation |
|---|---|
Use Scenario: Powers 3.3 V I/O banks and configuration logic in Xilinx Spartan-7 or Intel MAX 10 FPGAs. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering regulated 3.3 V from 5 V or 3.3 V system rail. Use Value: Delivers 2 A peak current with <10 mV load transient deviation and 94% efficiency at 1 A (PVIN = 5 V). |
Use Scenario: Supplies 3.3 V core voltage to TI C674x DSPs in industrial motor control gate drivers. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to DSP BGA package for minimal voltage drop. Use Value: Exposed-pad thermal design sustains 2 A load at 85°C ambient without airflow or heatsink. |
| Broadband Router PHY Power | Portable Medical Sensor Hub |
Use Scenario: Powers Ethernet PHY ICs (e.g., DP83867IR) requiring clean, low-noise 3.3 V supply. IC Role / Device Role / Timing Role: Secondary regulator downstream of main 5 V rail; filters switching noise via LC filter. Use Value: Soft-start (2.7 nF CSS) prevents inrush-induced brownout on shared 5 V bus during power-up. |
Use Scenario: Powers ultra-low-power ARM Cortex-M4 MCU and analog front-end in handheld ECG devices. IC Role / Device Role / Timing Role: Main system regulator enabling <10 µA shutdown mode between patient measurements. Use Value: 10 µA quiescent current extends CR2032 coin-cell life to >12 months in sleep mode. |
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-3.3 | 1.5 MHz switching frequency; same 3.3 V output, but higher fSW demands smaller inductors (1–10 µH) and lower-CO (10–100 µF) | Preferred for space-constrained designs where 500 kHz ripple is unacceptable; less suitable for high-current, low-EMI layouts | Select when board area is critical and ceramic output caps <22 µF are acceptable; verify thermal margin at 2 A |
| TPS54202DRCT | 2 A, 4.5–17 V input, adjustable output (0.6–6 V), 500 kHz, integrated soft-start (no external CSS required) | Wider VIN range suits 12 V intermediate bus; adjustable VOUT allows reuse across multiple rail voltages | Choose when input exceeds 5.5 V or programmable output is needed; adds external feedback resistors and loses factory trim accuracy |
Compared with LM2852XMXAX-3.3, the LM2852YMXAX-3.3 offers lower EMI and relaxed output capacitor ESR requirements; versus TPS54202DRCT, it provides tighter factory-set 3.3 V accuracy and simpler BOM but lacks input voltage flexibility.
Availability
LM2852YMXAX-3.3 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband PHY supply applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.
Supply support for LM2852YMXAX-3.3 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 LM2852 product line delivers highly integrated, easy-to-use synchronous buck regulators targeting cost-sensitive, space-constrained point-of-load applications in communications, computing, and industrial systems.
FAQ
What is the output voltage tolerance of the LM2852YMXAX-3.3 over temperature and load?
The LM2852YMXAX-3.3 has a guaranteed output voltage tolerance of ±2.23% over the full junction temperature range (–40°C to +125°C) and 0–2 A load, measured at the SNS pin in closed-loop configuration. This corresponds to 3.2257 V to 3.3743 V at 25°C and remains within spec across operating conditions without external trimming.
Can the LM2852YMXAX-3.3 operate with an input voltage of 3.3 V?
Yes, the LM2852YMXAX-3.3 supports PVIN down to 2.85 V, making it fully functional with a 3.3 V input. However, at VIN = VOUT = 3.3 V, duty cycle approaches 100%, reducing headroom for line/load transients; efficiency drops to ~76% at 2 A (per Figure 4), and thermal design must accommodate higher conduction losses.
What soft-start capacitor value is recommended for the LM2852YMXAX-3.3?
A 2.7 nF ceramic capacitor is the recommended soft-start value for the LM2852YMXAX-3.3, yielding approximately 3 ms startup time. This value falls within the validated 1–50 nF range and ensures controlled inrush current while avoiding current-limit activation during startup per TI SNVS325D Section 8.2.
Does the LM2852YMXAX-3.3 require external compensation components?
No, the LM2852YMXAX-3.3 integrates a complete type-three compensation network on-die. No external capacitors or resistors are needed for loop stability-only adherence to the recommended output inductor (6.8–15 µH) and capacitor (68–120 µF, ESR 95–275 mΩ) ranges per Table 1 in the datasheet ensures phase margin >45°.
How is thermal performance affected by the exposed pad on the LM2852YMXAX-3.3 package?
The exposed thermal pad on the LM2852YMXAX-3.3 HTSSOP-14 package reduces θJA to 38°C/W when soldered to ≥1 in² of 2-oz copper ground plane. Omitting pad connection degrades thermal resistance by >60%, risking thermal shutdown above 1.2 A at 85°C ambient-TI mandates full pad soldering for rated 2 A operation.
LM2852YMXAX-3.3 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):
- 3.3V
- 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-3.3 FAQ
1.How can I place an order for LM2852YMXAX-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-3.3 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-3.3 reliable?
The price and inventory of LM2852YMXAX-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXAX-3.3 is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXAX-3.3?
LM2852YMXAX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-3.3 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-3.3?
For technical support, including LM2852YMXAX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-3.3 requirements.
6.How does Aetrix verify that LM2852YMXAX-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-3.3 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-3.3 meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-3.3?
All LM2852YMXAX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-3.3, 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-3.3 part is unused and in its original packaging.
Return procedure for LM2852YMXAX-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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