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Texas Instruments LM2852XMXAX-0.8/NOPB
- Part No.:
- LM2852XMXAX-0.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXAX-0.8/NOPB.pdf
- Description:
- IC REG BUCK 0.8V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,355
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Product details
Overview
LM2852XMXAX-0.8/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 0.8V output, 1.5MHz switching frequency, internal 60mΩ PMOS/NMOS power switches, voltage-mode control, and integrated type-three compensation. It operates from 2.85V to 5.5V input and delivers high-efficiency point-of-load regulation for FPGA core supplies.
For engineers reviewing the LM2852XMXAX-0.8/NOPB datasheet, LM2852XMXAX-0.8/NOPB pinout, LM2852XMXAX-0.8/NOPB application, or LM2852XMXAX-0.8/NOPB equivalent, key selection criteria include its 1.5MHz operation enabling compact LC filtering, factory-trimmed 0.8V ±2.25% output accuracy at 25°C, and HTSSOP-14 exposed-pad thermal performance for industrial embedded power rails.
Technical Context
The LM2852XMXAX-0.8/NOPB implements voltage-mode PWM control with an internal oscillator fixed at 1500kHz, supporting ceramic output capacitors down to 10µF due to its high-frequency architecture. Its integrated type-three compensation eliminates external compensation components.
It features dual internal MOSFETs (75mΩ PMOS / 55mΩ NMOS typical at 25°C), soft-start via external capacitor (1–50nF), and UVLO with 2.47V rising threshold and 85mV hysteresis. The device uses separate AVIN (logic bias) and PVIN (power FET supply) rails for optimized efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8V ±2.25% (25°C), factory-trimmed for precision core rail generation |
| Switching Frequency | 1500kHz ±225kHz - enables use of small inductors (e.g., 1µH) and low-ESR ceramic output caps |
| Max Load Current | 2A continuous - supports FPGA, DSP, and ASIC core domains without external current boosting |
| Input Voltage Range | 2.85V to 5.5V - compatible with single-cell Li-ion, 3.3V, and 5V system rails |
| Efficiency @ 3.3VIN/0.8VOUT/1A | 92% typical - minimizes thermal load in space-constrained PCB layouts |
| Quiescent Current | 2mA typical (non-switching) - enables low-power standby modes in portable systems |
| Shutdown Current | 10µA max - preserves battery life during system sleep states |
Pinout & Package
LM2852XMXAX-0.8/NOPB is housed in a thermally enhanced 14-pin HTSSOP (PWP) package 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) | Logic bias supply | Provides regulated power to internal control circuitry; must be ≥2.85V and ≤PVIN |
| EN (2) | Enable input | Active-high logic enable; internally pulled up - tie to GND to disable, float or connect to AVIN to enable |
| SGND (3) | Signal ground reference | Reference node for error amplifier and feedback circuitry; separate from PGND to reduce noise coupling |
| SS (4) | Soft-start timing | Connects to external capacitor (e.g., 2.7nF) to control output ramp time and prevent inrush current |
| 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/NMOS switches; requires low-ESR bulk capacitor (e.g., 47µF ceramic) placed adjacent to pins |
| SW (8,9) | Power switch node | Drives external inductor; high di/dt node requiring short, wide trace to minimize EMI and conduction loss |
| PGND (10,11) | Power ground return | High-current return path for internal FETs; must connect to solid ground plane under exposed pad |
| SNS (14) | Output voltage sense | Remote sensing input - connect directly to load VOUT to compensate for IR drop in PCB traces |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates need for external compensation network - reduces BOM count and layout sensitivity |
| 1.5MHz Fixed Switching Frequency | Enables use of sub-2µH inductors and 10–100µF ceramic output capacitors for ultra-compact designs |
| Internal 60mΩ Power MOSFETs | Reduces conduction losses and external component count - supports full 2A load without heatsinking |
| Separate AVIN/PVIN Rails | Allows optimization of logic bias and power stage supply - improves efficiency when PVIN < AVIN (e.g., 3.3V PVIN + 5V AVIN) |
| Exposed-Pad HTSSOP-14 Package | Delivers 38°C/W thermal resistance - sustains 2A operation at ambient up to 85°C with minimal copper area |
Applications
| FPGA Core Power Supply | DSP/ASIC Local Regulation |
|---|---|
Use Scenario: Powers 0.8V I/O or core rail of Xilinx Artix-7 or Intel Cyclone V FPGA in compact industrial controller. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 0.8V at up to 2A with fast transient response. Use Value: Factory-trimmed 0.8V output ensures compliance with FPGA core voltage tolerance (±3%), while 1.5MHz operation minimizes footprint vs. 500kHz alternatives. | Use Scenario: Supplies 0.8V core voltage to TI C6748 DSP in medical imaging subsystem with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency DC-DC converter providing low-noise, low-ripple power with remote sensing for accurate load-point regulation. Use Value: SNS pin enables Kelvin sensing at the DSP VDD pin, eliminating trace IR drop error and maintaining ±1% regulation under dynamic load steps. |
| Portable Computing Subsystem | Broadband Network Processor Rail |
Use Scenario: Generates 0.8V supply for ARM Cortex-A9 cluster in ruggedized tablet design with battery input (3.0–4.2V). IC Role / Device Role / Timing Role: Efficient step-down regulator operating across full battery range with low quiescent current in sleep mode. Use Value: 10µA shutdown current extends battery runtime; 2.85V minimum input supports discharge down to 3.0V cell voltage. | Use Scenario: Powers 0.8V SerDes or PHY core in 10G Ethernet line card with high-density layout constraints. IC Role / Device Role / Timing Role: Compact, high-frequency power solution meeting tight thermal and EMI requirements in multi-layer backplane designs. Use Value: Exposed-pad HTSSOP package achieves 38°C/W θJA, enabling 2A operation without airflow - critical for sealed telecom enclosures. |
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-0.8/NOPB | Same 0.8V output and 1.5MHz frequency, but standard HTSSOP-14 (PWP) with 94-unit tape-and-reel packaging | Identical electrical performance; differs only in packaging quantity and MSL level (Level-1 vs TBD for XMXAX variant) | Select LM2852XMXAX-0.8/NOPB for high-volume production requiring 2500-unit reels and confirmed green RoHS compliance |
| TPS62231DRVR | 1.8–6.5V input, 0.8V output, 3MHz switching, 0.65Ω DCR inductor support, but only 1.2A rated load | Higher frequency allows smaller inductors, but lower current rating limits use to sub-1.2A loads | Choose TPS62231DRVR only when board space is more constrained than current demand - not a direct replacement for 2A applications |
Compared with LM2852XMXA-0.8/NOPB and TPS62231DRVR, the LM2852XMXAX-0.8/NOPB offers identical regulation and frequency but with higher-volume packaging and verified green RoHS status, whereas TPS62231DRVR trades current capability for higher switching frequency and smaller passive components.
Availability
LM2852XMXAX-0.8/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband networking infrastructure requiring stable component supply and long-term industrial lifecycle support.
Supply support for LM2852XMXAX-0.8/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, embedded processing, and power management ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2852 family belongs to TI's SIMPLE SWITCHER® portfolio - designed specifically for ease-of-use, minimal external component count, and robust performance in point-of-load DC-DC conversion for FPGA, DSP, and communications equipment.
FAQ
What is the output voltage tolerance of the LM2852XMXAX-0.8/NOPB over temperature?
The LM2852XMXAX-0.8/NOPB has a guaranteed output voltage tolerance of ±2.25% over the full –40°C to +125°C junction temperature range, measured at the SNS pin in closed-loop configuration. At 25°C, typical tolerance is tighter (±1.8%), and the device uses factory-trimmed internal DAC and resistor divider to maintain accuracy without external feedback resistors.
Does the LM2852XMXAX-0.8/NOPB require external compensation components?
No, the LM2852XMXAX-0.8/NOPB integrates a complete type-three compensation network on-die. This eliminates the need for external compensation capacitors or resistors, reducing BOM count and layout complexity. Stability is ensured when using recommended output filter components (e.g., 1µH inductor and 10–100µF ceramic capacitor for the 1.5MHz version).
What is the purpose of the separate AVIN and PVIN pins on the LM2852XMXAX-0.8/NOPB?
The AVIN pin supplies power to the internal control logic and reference circuits, while PVIN powers the high-current PMOS/NMOS power switches. This separation allows optimizing each rail independently - for example, using a clean 5V AVIN for stable control bias while running PVIN from a noisier 3.3V system rail, improving overall regulation accuracy and efficiency.
Can the LM2852XMXAX-0.8/NOPB operate with a 2.5V input voltage?
No, the LM2852XMXAX-0.8/NOPB requires a minimum AVIN voltage of 2.85V to ensure proper operation of its internal bias circuitry and reference. While PVIN may tolerate lower voltages in some configurations, the absolute minimum AVIN is 2.85V per the Absolute Maximum Ratings table - operation below this risks undervoltage lockout or unstable regulation.
How does the soft-start function work on the LM2852XMXAX-0.8/NOPB?
The LM2852XMXAX-0.8/NOPB implements soft-start by charging an external capacitor (CSS) connected to the SS pin via an internal 400kΩ resistor. The DAC reference voltage ramps linearly, causing the output to track at 2× rate until reaching 0.8V. A 2.7nF CSS yields ~3ms startup time, preventing inrush current and ensuring controlled power-up in systems with multiple rails.
LM2852XMXAX-0.8/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):
- 0.8V
- 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-0.8/NOPB FAQ
1.How can I place an order for LM2852XMXAX-0.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXAX-0.8/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-0.8/NOPB reliable?
The price and inventory of LM2852XMXAX-0.8/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-0.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852XMXAX-0.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXAX-0.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXAX-0.8/NOPB?
LM2852XMXAX-0.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXAX-0.8/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-0.8/NOPB?
For technical support, including LM2852XMXAX-0.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXAX-0.8/NOPB requirements.
6.How does Aetrix verify that LM2852XMXAX-0.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852XMXAX-0.8/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-0.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852XMXAX-0.8/NOPB?
All LM2852XMXAX-0.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXAX-0.8/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-0.8/NOPB part is unused and in its original packaging.
Return procedure for LM2852XMXAX-0.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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