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Texas Instruments LM2852XMXAX-1.0/NOPB
- Part No.:
- LM2852XMXAX-1.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXAX-1.0/NOPB.pdf
- Description:
- IC REG BUCK 1V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,258
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Product details
Overview
LM2852XMXAX-1.0/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 1.0V output, 1.5MHz switching frequency, internal 60mΩ MOSFETs, voltage-mode control, and integrated type-three compensation. It operates from 2.85V to 5.5V input and delivers tight ±2.25% output tolerance over temperature for FPGA core power applications.
For engineers reviewing the LM2852XMXAX-1.0/NOPB datasheet, LM2852XMXAX-1.0/NOPB pinout, LM2852XMXAX-1.0/NOPB application, or LM2852XMXAX-1.0/NOPB equivalent, key selection criteria include 1.5MHz high-frequency operation enabling compact 1µH inductors, HTSSOP-14 exposed-pad thermal performance, and factory-programmed 1.0V output eliminating external feedback resistors.
Technical Context
The LM2852XMXAX-1.0/NOPB implements voltage-mode PWM control with an internal oscillator set to 1.5MHz (±225kHz), supporting ceramic output capacitors down to 10µF with low ESR. Its integrated PFET/NFET power stage features 75–140mΩ and 55–120mΩ on-resistance respectively, enabling >90% efficiency at 2A load with 3.3V input.
Startup is managed via soft-start pin (SS) with 400kΩ internal resistor and 20pF node capacitance; external CSS ≥1nF controls ramp time. UVLO triggers at AVIN falling below 2.47V with 85–210mV hysteresis, and thermal shutdown activates at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0V ±2.25% (0.9775V to 1.0225V) - factory-trimmed, no external feedback required |
| Switching Frequency | 1.5MHz (1050–1825kHz range) - enables small 1µH inductors and fast transient response |
| Max Load Current | 2A continuous - supported by internal 60mΩ MOSFETs and thermal design of HTSSOP-14 package |
| Input Voltage Range | 2.85V to 5.5V - compatible with 3.3V and 5V system rails |
| Quiescent Current | 0.85–2mA (non-switching), 10–25µA (shutdown) - suitable for battery-backed or low-power standby modes |
| Efficiency @ 2A | 92% typical at PVIN=3.3V, VOUT=1.0V - measured per Figure 7, enabling minimal thermal derating |
| Thermal Resistance | θJA = 38°C/W - achieved via exposed die pad soldered to PCB ground plane |
Pinout & Package
LM2852XMXAX-1.0/NOPB uses a 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed thermal pad connected to PGND. The package supports 260°C reflow (Level-1 MSL) and operates from −40°C to +125°C junction temperature.
| 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 enable |
| SGND (3) | Signal ground reference | Separate from PGND; connects to error amp and compensation network |
| SS (4) | Soft-start timing | Charged by 400kΩ internal resistor; 1–50nF external capacitor sets startup ramp |
| 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 PFET; connect directly to bulk input capacitor |
| SW (8,9) | Power switch node | Connects to inductor; high dv/dt node requiring short, wide trace layout |
| PGND (10,11) | Power ground return | High-current return path for PFET/NFET; tie to exposed pad and main ground plane |
| SNS (14) | Output voltage sense | Remote sensing point; connect directly to load for <±8mV/A load regulation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.0V output | Eliminates external feedback resistors and associated layout sensitivity |
| 1.5MHz fixed-frequency operation | Reduces inductor size to 1µH and enables use of low-ESR ceramic output capacitors |
| Integrated type-three compensation | Removes need for external compensation components; ensures stability with recommended L/C ranges |
| Internal 60mΩ MOSFETs | Enables 2A continuous output without external switches or heatsinking |
| Exposed-pad HTSSOP-14 package | Delivers 38°C/W thermal resistance for reliable operation at full load in compact layouts |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Powering FPGA core logic requiring stable 1.0V at up to 2A with fast transient response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.0V rail directly to FPGA VCCINT pins. Use Value: 1.5MHz switching minimizes output ripple and improves transient recovery during logic state changes. | Use Scenario: Local DC-DC conversion for ASIC digital core in broadband networking equipment. IC Role / Device Role / Timing Role: Point-of-load regulator converting 3.3V backplane supply to 1.0V ASIC core voltage. Use Value: Tight ±2.25% output tolerance ensures compliance with ASIC core voltage specifications across temperature. |
| Application 3 | Application 4 |
Use Scenario: Power management in portable computing subsystems where board space is constrained. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 1.0V to processor I/O or memory interface circuits. Use Value: HTSSOP-14 package with exposed pad enables thermal performance matching larger packages in dense layouts. | Use Scenario: Low-voltage regulation for DSP-based signal processing modules in industrial controllers. IC Role / Device Role / Timing Role: Fixed-output buck regulator powering DSP core with minimal external components. Use Value: Integrated compensation and factory-set 1.0V eliminate tuning effort and reduce BOM count to just CIN, CSS, L, and CO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXA-1.0/NOPB | Tape-and-reel quantity 94 vs 2500; identical electrical specs and marking "2852X 1.0" | Same 1.0V output, 1.5MHz, HTSSOP-14; differs only in packaging configuration | Select LM2852XMXAX-1.0/NOPB for high-volume production; LM2852XMXA-1.0/NOPB for prototyping or low-quantity builds |
| TPS62231DRVR | 1.5MHz, 2A, 1.0V fixed output but uses current-mode control and different pinout (6-pin WSON) | Lacks SNS pin for remote sensing; requires external compensation; smaller footprint but higher thermal resistance (θJA = 60°C/W) | Choose TPS62231DRVR only if board area is critical and remote sensing is not required |
Compared with LM2852XMXAX-1.0/NOPB, LM2852XMXA-1.0/NOPB offers identical performance in smaller reels, while TPS62231DRVR trades remote sensing and thermal performance for footprint reduction-making LM2852XMXAX-1.0/NOPB optimal for thermally demanding, precision-regulated 1.0V applications.
Availability
LM2852XMXAX-1.0/NOPB is available at Aetrix Electronics and suitable for FPGA core power, ASIC point-of-load regulation, and portable computing subsystems requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for LM2852XMXAX-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 and embedded processing technologies, with decades of expertise in power management ICs.
The LM2852 family belongs to TI's SIMPLE SWITCHER® portfolio, designed specifically for easy-to-use, high-efficiency DC-DC buck conversion in space-constrained, thermally sensitive applications like FPGA and DSP power supplies.
FAQ
What is the switching frequency of the LM2852XMXAX-1.0/NOPB?
The LM2852XMXAX-1.0/NOPB operates at a fixed 1.5MHz switching frequency, with a guaranteed range of 1050–1825kHz across temperature and input voltage. This high frequency allows use of compact 1µH inductors and low-ESR ceramic output capacitors, reducing solution size versus lower-frequency alternatives. The frequency is factory-set and not adjustable.
Does the LM2852XMXAX-1.0/NOPB require external feedback resistors?
No, the LM2852XMXAX-1.0/NOPB does not require external feedback resistors. Its 1.0V output is factory-programmed and trimmed, with internal resistor divider and DAC-based reference. This eliminates feedback component variation, layout sensitivity, and BOM cost-confirmed by the "1.0" marking on the device and Electrical Characteristics table specifying VOUT = 1.0V option tolerance.
What is the maximum continuous output current for LM2852XMXAX-1.0/NOPB?
The LM2852XMXAX-1.0/NOPB delivers up to 2A continuous output current under thermal limits. This is enabled by its internal 60mΩ MOSFETs and HTSSOP-14 package with exposed thermal pad. Efficiency data (Figure 7) and thermal resistance (θJA = 38°C/W) confirm stable 2A operation at ambient temperatures up to 85°C with proper PCB copper area.
How is soft-start configured on the LM2852XMXAX-1.0/NOPB?
Soft-start on the LM2852XMXAX-1.0/NOPB is configured using an external capacitor (CSS) on the SS pin, which charges through an internal 400kΩ resistor. A 2.7nF capacitor yields ~3ms startup time. CSS must be between 1nF and 50nF per datasheet Section 8.2; values outside this range may cause fault-mode behavior or unstable start-up.
What package type and thermal characteristics does the LM2852XMXAX-1.0/NOPB use?
The LM2852XMXAX-1.0/NOPB uses a 14-pin HTSSOP package (PWP0014A) with exposed thermal pad. Its thermal resistance is θJA = 38°C/W when the pad is soldered to a minimum 1-in² PCB ground plane. This enables full 2A operation without forced air, verified by thermal shutdown activation at 165°C with 10°C hysteresis.
LM2852XMXAX-1.0/NOPB 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):
- 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
LM2852XMXAX-1.0/NOPB FAQ
1.How can I place an order for LM2852XMXAX-1.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXAX-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 LM2852XMXAX-1.0/NOPB reliable?
The price and inventory of LM2852XMXAX-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 LM2852XMXAX-1.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852XMXAX-1.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXAX-1.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXAX-1.0/NOPB?
LM2852XMXAX-1.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXAX-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 LM2852XMXAX-1.0/NOPB?
For technical support, including LM2852XMXAX-1.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXAX-1.0/NOPB requirements.
6.How does Aetrix verify that LM2852XMXAX-1.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852XMXAX-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 LM2852XMXAX-1.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852XMXAX-1.0/NOPB?
All LM2852XMXAX-1.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXAX-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 LM2852XMXAX-1.0/NOPB part is unused and in its original packaging.
Return procedure for LM2852XMXAX-1.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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