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Texas Instruments LM2852XMXA-1.0
- Part No.:
- LM2852XMXA-1.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-1.0.pdf
- Description:
- IC REG BUCK 1V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
LM2852XMXA-1.0 from Texas Instruments is a 2A synchronous buck regulator with fixed 1.0V output, 1.5MHz switching frequency, and input voltage range of 2.85V to 5.5V. It integrates dual MOSFETs (60mΩ PFET / 55mΩ NFET), internal type-three compensation, and soft-start control via external capacitor. Designed for low-voltage point-of-load regulation in FPGA/DSP core supplies.
For engineers reviewing the LM2852XMXA-1.0 datasheet, LM2852XMXA-1.0 pinout, LM2852XMXA-1.0 application, or LM2852XMXA-1.0 equivalent, key selection criteria include 1.5MHz operation for compact filter design, 10µA shutdown current, HTSSOP-14 thermal performance, and factory-set 1.0V output with ±2.25% tolerance over –40°C to +125°C.
Technical Context
The LM2852XMXA-1.0 implements voltage-mode PWM control with integrated 1.5MHz oscillator and internal type-three compensation network, eliminating external compensation components. Its architecture uses a dedicated AVIN bias rail (2.85–5.5V) and separate PVIN power rail (1.5–5.5V) to optimize logic and power-stage efficiency.
Protection features include cycle-by-cycle current limiting (4.95A peak), thermal shutdown at 165°C with 10°C hysteresis, and undervoltage lockout on AVIN with 85mV hysteresis. The device supports split-rail operation and requires no external bootstrap capacitor due to integrated gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0V ±2.25% (ensured over –40°C to +125°C junction temperature) |
| Max Output Current | 2A continuous load capability with internal MOSFETs (75mΩ PFET / 55mΩ NFET) |
| Switching Frequency | 1.5MHz nominal (1050–1825kHz range), enabling small 1µH inductors and ceramic output capacitors |
| Input Voltage Range | 2.85V to 5.5V on AVIN; 1.5V to 5.5V on PVIN - supports split-rail operation |
| Shutdown Current | 10µA typical at 25°C, enabling ultra-low-power system standby modes |
| Line Regulation | 0.2–0.6% over 2.85–5.5V AVIN, minimizing output drift during input transients |
| Soft-Start Control | RC-based (400kΩ internal resistor + external capacitor), supports 1–50nF CSS for controlled ramp-up |
Pinout & Package
LM2852XMXA-1.0 is housed in a thermally enhanced 14-pin HTSSOP package (PWP0014A) with exposed die attach pad soldered to PCB ground for optimal thermal dissipation (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥2.85V and ≥PVIN |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for high |
| SGND (3) | Signal ground reference | Reference for error amplifier and feedback circuitry; separate from PGND |
| SS (4) | Soft-start timing node | Connects to external capacitor (1–50nF) to control output voltage ramp rate |
| 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 PFET source; accepts 1.5–5.5V; high-current path |
| SNS (14) | Output voltage sense | High-impedance feedback input; connect directly at load for accurate regulation |
| SW (8,9) | Power switch node | Drives external inductor; carries full switching current and high dv/dt |
| PGND (10,11) | Power ground return | Low-impedance return path for PFET/NFET currents; connect to large ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.0V output | Eliminates external feedback resistors; ensures ±2.25% accuracy across temperature |
| 1.5MHz fixed-frequency operation | Enables use of 1µH inductors and low-ESR ceramic capacitors for space-constrained designs |
| Integrated type-three compensation | Removes need for external compensation network; simplifies layout and reduces BOM count |
| Split-rail AVIN/PVIN architecture | Allows independent optimization of control logic supply and power stage supply |
| Exposed-pad HTSSOP thermal design | Supports 2A continuous operation at ambient temperatures up to +85°C without heatsink |
Applications
| FPGA Core Power Supply | DSP Local Point-of-Load Regulation |
|---|---|
Use Scenario: Providing stable 1.0V core voltage to Xilinx Artix-7 or Intel Cyclone V FPGA banks under dynamic load conditions. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering up to 2A with fast transient response and low output ripple. Use Value: Enables reliable FPGA operation at 1.0V with <±2.25% regulation, supporting high-speed configuration and logic execution. |
Use Scenario: Regulating 1.0V supply for TI C6000 DSP cores in broadband infrastructure equipment. IC Role / Device Role / Timing Role: Synchronous buck converter with 1.5MHz switching to minimize EMI near sensitive analog sections. Use Value: Delivers 2A at 1.0V with 10µA shutdown current, extending battery life in portable test instruments. |
| Portable Computing Subsystem | Industrial IoT Sensor Hub |
Use Scenario: Powering ARM Cortex-M7 microcontroller subsystems in handheld medical devices requiring low-noise 1.0V rails. IC Role / Device Role / Timing Role: Compact, thermally efficient buck regulator operating from single-cell Li-ion (3.3V) input. Use Value: Achieves >92% efficiency at 1A load from 3.3V input, reducing thermal load in sealed enclosures. |
Use Scenario: Generating 1.0V supply for ultra-low-power sensor fusion processors in edge-node gateways. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with enable control synchronized to sensor sampling intervals. Use Value: Supports duty-cycled operation with 10µA quiescent current in shutdown, extending 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852YMXA-1.0 | 500kHz switching frequency; wider inductor range (10–22µH); higher minimum input voltage (2.85V on both rails) | Better suited for noise-sensitive audio subsystems where lower switching frequency reduces EMI risk | Select when board space allows larger inductors and lower-frequency operation is preferred for EMI compliance |
| TPS62231DRVR | 3MHz switching; 0.95V–6.5V input; 1.0V fixed output; 0.95µA IQ in shutdown; 2mm × 2mm WSON package | Targeted at ultra-compact portable designs where footprint and quiescent current are primary constraints | Choose when PCB area is critical and 3MHz operation enables sub-1µH inductors and minimal output capacitance |
Compared with LM2852YMXA-1.0 and TPS62231DRVR, the LM2852XMXA-1.0 offers the optimal balance of 1.5MHz switching for size reduction, robust 2A capability with integrated FETs, and proven thermal performance in HTSSOP packaging - making it ideal for industrial and communications applications requiring reliability at elevated ambient temperatures.
Availability
LM2852XMXA-1.0 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and portable computing subsystems requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for LM2852XMXA-1.0 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 and embedded processing technologies, with decades of expertise in power management ICs.
The LM2852XMXA-1.0 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for high-efficiency, low-component-count DC-DC conversion in space- and thermally constrained applications.
FAQ
What is the guaranteed output voltage tolerance for LM2852XMXA-1.0 across temperature?
The LM2852XMXA-1.0 guarantees a 1.0V output with ±2.25% tolerance over the full –40°C to +125°C junction temperature range, as verified by production testing per SNVS325D datasheet Section 6.5. This specification applies specifically to the factory-programmed 1.0V variant and does not require external feedback components.
Can LM2852XMXA-1.0 operate with PVIN lower than AVIN, and what are the limits?
Yes - the LM2852XMXA-1.0 supports split-rail operation where PVIN may be lower than AVIN, but PVIN must never exceed AVIN. Per datasheet Section 7.3, PVIN operates from 1.5V to 5.5V while AVIN requires 2.85V to 5.5V; for PVIN < 3.3V, output filter values follow the 3.3V recommendations in Table 1.
What soft-start capacitor value is recommended for LM2852XMXA-1.0 to achieve ~3ms startup time?
A 2.7nF ceramic capacitor on the SS pin is recommended for ~3ms startup time, based on the internal 400kΩ soft-start resistor and RC time constant calculation (3 × R × C ≈ 3ms). This value is validated in TI's LM2852 application notes and matches the reference design in Table 4 for LM2852X variants.
Does LM2852XMXA-1.0 require external compensation components?
No - the LM2852XMXA-1.0 integrates a complete type-three compensation network, eliminating the need for external capacitors or resistors in the feedback loop. This is confirmed in the "COMPENSATION" section (page 9) of SNVS325D, which states "compensation… is included on-chip" and restricts L/C/ESR ranges to ensure stability without user adjustment.
What is the maximum junction temperature and thermal shutdown behavior of LM2852XMXA-1.0?
The LM2852XMXA-1.0 has a maximum junction temperature of 150°C and initiates thermal shutdown at 165°C with 10°C hysteresis (TSD-HYS), as specified in Section 6.3 of SNVS325D. After shutdown, the device remains off until junction temperature falls below 155°C, then resumes normal operation without requiring an enable toggle.
LM2852XMXA-1.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2852XMXA-1.0 FAQ
1.How can I place an order for LM2852XMXA-1.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-1.0 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 LM2852XMXA-1.0 reliable?
The price and inventory of LM2852XMXA-1.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXA-1.0 is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-1.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-1.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-1.0?
LM2852XMXA-1.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-1.0 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 LM2852XMXA-1.0?
For technical support, including LM2852XMXA-1.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-1.0 requirements.
6.How does Aetrix verify that LM2852XMXA-1.0 is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-1.0 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 LM2852XMXA-1.0 meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-1.0?
All LM2852XMXA-1.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-1.0, 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 LM2852XMXA-1.0 part is unused and in its original packaging.
Return procedure for LM2852XMXA-1.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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