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Texas Instruments LM2852XMXA-1.2/NOPB
- Part No.:
- LM2852XMXA-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852XMXA-1.2/NOPB.pdf
- Description:
- IC REG BUCK 1.2V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:226
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Product details
Overview
LM2852XMXA-1.2/NOPB from Texas Instruments is a 2 A synchronous buck regulator with fixed 1.2 V output, 1.5 MHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ MOSFETs, and HTSSOP-14 package with exposed thermal pad. It delivers point-of-load power for FPGA core rails in portable computing systems.
For engineers reviewing the LM2852XMXA-1.2/NOPB datasheet, LM2852XMXA-1.2/NOPB pinout, LM2852XMXA-1.2/NOPB application, or LM2852XMXA-1.2/NOPB equivalent, key selection criteria include 1.5 MHz operation for compact filter design, factory-programmed 1.2 V output tolerance (±2.25%), and thermal performance enabled by the exposed-pad HTSSOP-14 package.
Technical Context
The LM2852XMXA-1.2/NOPB implements voltage-mode control with internal type-three compensation, eliminating external compensation components. Its 1.5 MHz fixed-frequency PWM generator enables use of small inductors (e.g., 1–3.3 µH) and ceramic output capacitors with ESR <10 mΩ.
Split-rail operation allows independent AVIN (logic bias) and PVIN (power FET supply) inputs, with PVIN ≤ AVIN. Switch-node protection logic disables switching under no-load conditions until load is applied, preventing erratic startup behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2.25% (0.782–1.227 V) over –40°C to 125°C junction temperature |
| Max Output Current | 2 A continuous; peak current limit 2.75–4.95 A ensures robust overload handling |
| Switching Frequency | 1.5 MHz (±25% over temperature); enables <3.3 µH inductors and low-ESR ceramic output caps |
| Input Voltage Range | 2.85 V to 5.5 V; UVLO threshold 2.85 V (rising), 85–210 mV hysteresis |
| Efficiency | Up to 94% at 1.2 V/1 A with PVIN = 3.3 V; optimized for high efficiency in 1–2 A portable loads |
| Quiescent Current | 0.85 mA typical (non-switching), 10 µA shutdown current minimizes battery drain |
| Thermal Resistance | RθJA = 39.2°C/W; RθJC(bot) = 1.7°C/W enables >1.5 W dissipation with PCB copper pour |
Pinout & Package
LM2852XMXA-1.2/NOPB uses a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Powers internal logic; must be ≥ PVIN and within 2.85–5.5 V |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for enable |
| SGND (Pin 3) | Signal ground reference | Separate from power ground to reduce noise coupling into feedback path |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; sets controlled 3 ms startup ramp for 2.7 nF |
| NC (Pins 5, 12, 13) | No connect | Must be left floating or tied to GND; no internal connection |
| PVIN (Pins 6, 7) | Power FET supply | Drives internal PFET/NFET switches; connects to bulk input capacitor |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; route directly to load for accurate regulation |
| PGND (Pins 10, 11) | Power ground return | Low-impedance return path for switch currents; connect to thermal pad and ground plane |
| SW (Pins 8, 9) | Switch node | Connects to inductor; carries high di/dt; requires short, wide trace to minimize EMI |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables stable operation with standard LC filters; eliminates need for slope compensation |
| Integrated type-three compensation | Removes requirement for external compensation network; reduces BOM count and layout complexity |
| 1.5 MHz fixed switching frequency | Supports ultra-compact designs: 1 µH inductors and 10 µF ceramic output capacitors |
| Internal 60 mΩ MOSFETs (PFET + NFET) | Eliminates external power switches; achieves >90% efficiency at 1.2 V/1 A with 3.3 V input |
| Split-rail AVIN/PVIN architecture | Allows optimization of logic supply (e.g., 3.3 V) and power rail (e.g., 5 V) independently |
Applications
| Portable Computing Core Rail | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Powering ARM Cortex-A series SoC cores in ultrabooks and tablets requiring tight 1.2 V regulation under dynamic load steps. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated 1.2 V at up to 2 A with <100 µs transient response. Use Value: 1.5 MHz operation enables fast transient response and small 1 µH inductors, reducing solution footprint by >40% vs. 500 kHz alternatives. | Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 FPGAs where voltage margining and low noise are critical. IC Role / Device Role / Timing Role: Local point-of-load regulator with SNS pin routed directly to FPGA VCCIO pins for precise remote sensing. Use Value: ±2.25% output tolerance and <8 mV/A load regulation ensure compliance with FPGA I/O voltage specs across temperature and load. |
| Industrial PLC Digital I/O Module | Medical Imaging Sensor Interface |
Use Scenario: Providing isolated 1.2 V power to microcontroller peripherals in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Secondary regulator fed from 5 V intermediate bus; operates continuously in –40°C to 85°C ambient. Use Value: RθJC(bot) = 1.7°C/W and thermal shutdown at 165°C enable reliable operation without heatsinks in convection-cooled enclosures. | Use Scenario: Powering low-noise analog front-end ASICs in portable ultrasound transducers requiring clean, stable 1.2 V supply. IC Role / Device Role / Timing Role: Low-ripple buck converter with soft-start (2.7 nF CSS) preventing inrush-induced sensor offset drift. Use Value: 10 µA shutdown current extends battery life during standby; <100 µVpp output ripple supports 16-bit ADC accuracy. |
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-1.2/NOPB | 500 kHz switching frequency; higher inductor values (10–15 µH) required; lower light-load efficiency | Better suited for cost-sensitive industrial applications where board space is less constrained | Select when EMI filtering is prioritized over size, or when legacy 500 kHz designs require drop-in replacement |
| TPS62231DRVR | 1.8–6.5 V input; 1.2 V output; 3 MHz switching; 0.65 A max current; smaller 6-pin WSON package | Targeted at sub-1 A portable applications; lacks split-rail AVIN/PVIN and internal compensation | Choose only for space-constrained, low-current (<0.65 A) designs where external compensation is acceptable |
Compared with LM2852YMXA-1.2/NOPB, the LM2852XMXA-1.2/NOPB trades slightly higher switching losses for 3× smaller magnetics and tighter transient response; versus TPS62231DRVR, it provides 3× higher current capability and integrated compensation but requires larger HTSSOP-14 layout area.
Availability
LM2852XMXA-1.2/NOPB is available at Aetrix Electronics and suitable for portable computing, FPGA power delivery, and industrial embedded systems requiring stable component supply and long-term manufacturability.
Supply support for LM2852XMXA-1.2/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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The LM2852 product line delivers high-frequency synchronous buck regulators for space-constrained point-of-load applications, emphasizing integration, thermal performance, and ease of design through internal compensation and split-rail flexibility.
FAQ
What is the guaranteed output voltage tolerance for LM2852XMXA-1.2/NOPB across temperature?
The LM2852XMXA-1.2/NOPB guarantees ±2.25% output voltage tolerance (1.173 V to 1.227 V) over the full –40°C to 125°C junction temperature range, as specified in the Electrical Characteristics table under VOUT parameter for the 1.2-V option.
Can LM2852XMXA-1.2/NOPB operate with PVIN lower than AVIN, and what are the limits?
Yes - LM2852XMXA-1.2/NOPB supports split-rail operation where PVIN may be lower than AVIN, but PVIN must never exceed AVIN. PVIN must remain within 2.85 V to 5.5 V, and AVIN must be ≥ PVIN and also within 2.85 V to 5.5 V per Recommended Operating Conditions.
What soft-start capacitor value is recommended for LM2852XMXA-1.2/NOPB, and why?
A 2.7 nF ceramic capacitor is recommended for LM2852XMXA-1.2/NOPB's SS pin to achieve ~3 ms controlled startup. This value balances inrush current limiting with timely system boot, and falls within the validated 1–50 nF range that ensures proper fault recovery and soft-start capacitor tracking during short-circuit events.
Does LM2852XMXA-1.2/NOPB require external compensation components?
No - LM2852XMXA-1.2/NOPB integrates a complete type-three compensation network internally. This eliminates external resistors and capacitors from the feedback loop, simplifying design, improving stability across recommended L/C ranges, and reducing bill-of-materials count.
What is the maximum allowable input voltage for LM2852XMXA-1.2/NOPB, and what protection exists beyond that?
The absolute maximum PVIN/AVIN rating for LM2852XMXA-1.2/NOPB is 6.5 V. Exceeding this risks permanent damage. The device includes UVLO (2.85 V turn-on) and thermal shutdown (165°C with 10°C hysteresis), but no overvoltage protection circuitry - external TVS or clamp diodes are required if input transients exceed 6.5 V.
LM2852XMXA-1.2/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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):
- 1.2V
- 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-1.2/NOPB FAQ
1.How can I place an order for LM2852XMXA-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852XMXA-1.2/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 LM2852XMXA-1.2/NOPB reliable?
The price and inventory of LM2852XMXA-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852XMXA-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852XMXA-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852XMXA-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852XMXA-1.2/NOPB?
LM2852XMXA-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852XMXA-1.2/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 LM2852XMXA-1.2/NOPB?
For technical support, including LM2852XMXA-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852XMXA-1.2/NOPB requirements.
6.How does Aetrix verify that LM2852XMXA-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852XMXA-1.2/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 LM2852XMXA-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852XMXA-1.2/NOPB?
All LM2852XMXA-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852XMXA-1.2/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 LM2852XMXA-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM2852XMXA-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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