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Texas Instruments LM2852YMXAX-1.2/NOPB
- Part No.:
- LM2852YMXAX-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-1.2/NOPB.pdf
- Description:
- IC REG BUCK 1.2V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:520
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Product details
Overview
LM2852YMXAX-1.2/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 1.2V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60-mΩ MOSFETs, and voltage-mode control. It delivers point-of-load power to FPGA core rails in portable computing systems with high efficiency at light-to-moderate loads.
For engineers reviewing the LM2852YMXAX-1.2/NOPB datasheet, LM2852YMXAX-1.2/NOPB pinout, LM2852YMXAX-1.2/NOPB application, or LM2852YMXAX-1.2/NOPB equivalent, key selection criteria include factory-programmed 1.2V output accuracy (±2.7%), thermal performance in HTSSOP-14 (RθJA = 39.2°C/W), soft-start capacitor programmability (1–50 nF), and compatibility with ceramic or tantalum output capacitors per TI's recommended filter tables.
Technical Context
The LM2852YMXAX-1.2/NOPB implements voltage-mode PWM control with internal type-three compensation, eliminating external compensation components. Its split-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized input filtering and thermal management.
Switch node protection logic disables switching under no-load or light-load conditions until load current exceeds threshold-ensuring safe startup and preventing unintended oscillation. The device integrates UVLO (2.85 V rising), thermal shutdown (165°C), and peak-current limiting (2.25–3.65 A) with 10 µA shutdown quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2.7% (0.782–1.227 V over –40°C to 125°C) |
| Max Output Current | 2 A continuous; peak current limit 2.25–3.65 A ensures robust overload handling |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN ≤ AVIN supports flexible rail partitioning |
| Switching Frequency | 500 kHz ±37.5% (325–625 kHz); enables compact magnetics and low EMI |
| Efficiency | Up to 94% at 1.2 V/2 A with 3.3 V input; >88% at 100 mA load |
| Quiescent Current | 0.85 mA typical non-switching; 10 µA shutdown current minimizes battery drain |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14); RθJC(bot) = 1.7°C/W enables direct PCB heatsinking |
Pinout & Package
LM2852YMXAX-1.2/NOPB uses a thermally enhanced 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed pad for ground connection and improved power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥2.85 V and ≥ PVIN |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; 75% AVIN threshold for activation |
| SGND (Pin 3) | Signal ground reference | Separate from PGND to minimize noise coupling into feedback path |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; controls output ramp time and prevents inrush |
| 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 high-side PFET; requires low-impedance local decoupling |
| SNS (Pin 14) | Voltage sense input | High-impedance feedback node; connect directly to load for accurate regulation |
| PGND (Pins 10, 11) | Power ground return | Carries high-frequency switch currents; connect to large copper pour |
| SW (Pins 8, 9) | Switch node output | Drives external inductor; high dv/dt node requiring short, wide trace routing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output | 1.2 V set permanently during manufacturing-no external resistors required |
| Integrated power switches | 75 mΩ PFET + 55 mΩ NFET at 25°C enable high efficiency without external MOSFETs |
| Internal type-three compensation | Eliminates external compensation network; stable with TI-recommended L/C ranges only |
| Split-rail operation | Independent AVIN/PVIN supplies allow optimization of logic vs. power rail noise and loss |
| Switch node protection | Prevents false triggering during no-load startup by disabling switching until load is applied |
Applications
| Portable Computing Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM-based SoC cores in ultrabooks with dynamic voltage scaling between 0.8 V and 1.2 V. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering tightly regulated 1.2 V at up to 2 A with fast transient response. Use Value: Factory-set 1.2 V eliminates resistor divider errors; 500 kHz switching allows use of small 10–15 µH inductors and 100 µF tantalum output caps. | Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 FPGAs where VCCO must track 1.2 V I/O standards. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to FPGA package for minimal IR drop and noise. Use Value: SGND/PGND separation and SNS remote sensing ensure <±10 mV regulation accuracy at the FPGA ball; soft-start prevents configuration glitches. |
| Industrial Sensor Node Power | Networking ASIC Bias Rail |
Use Scenario: Powering low-power wireless sensor nodes (e.g., BLE + MEMS) operating from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Main system regulator converting battery voltage to stable 1.2 V for MCU and analog front-end. Use Value: 10 µA shutdown current extends battery life; UVLO hysteresis (85–210 mV) prevents brownout oscillation during discharge. | Use Scenario: Providing clean 1.2 V bias to SerDes lanes in 10G Ethernet PHY ASICs with strict PSRR requirements. IC Role / Device Role / Timing Role: Secondary regulator downstream of primary 3.3 V supply, rejecting high-frequency noise from digital switching. Use Value: 500 kHz fixed frequency enables predictable EMI filtering; internal compensation avoids phase-margin degradation from layout parasitics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.2 V fixed, 3 MHz switching, 0.65 A max, smaller 6-pin WSON package | Limited to sub-1 A loads; higher frequency enables smaller passives but increases EMI sensitivity | Select when board space is critical and load ≤0.65 A; not suitable for 2 A FPGA core rails |
| LM2678SD-1.2/NOPB | 1.2 V fixed, 100 kHz switching, 5 A max, SO-8 package, external compensation | Lower frequency demands larger inductors/caps; requires external RC network for stability | Choose for high-current industrial loads needing ruggedness over size; adds design complexity |
Compared with TPS62231DRVR and LM2678SD-1.2/NOPB, LM2852YMXAX-1.2/NOPB uniquely balances 2 A capability, integrated compensation, and 500 kHz operation in HTSSOP-14-making it optimal for mid-power portable and FPGA applications where layout simplicity and thermal performance are prioritized over ultra-small footprint or extreme current rating.
Availability
LM2852YMXAX-1.2/NOPB is available at Aetrix Electronics and suitable for portable computing, FPGA power delivery, and industrial sensor node designs requiring stable component supply, long-term lifecycle support, and TI-qualified production-grade reliability.
Supply support for LM2852YMXAX-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 leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC-DC conversion.
The LM2852 product line delivers compact, integrated synchronous buck regulators for point-of-load applications in portable, networking, and industrial systems-designed to reduce external component count while maintaining precision regulation and thermal robustness.
FAQ
What is the output voltage tolerance of LM2852YMXAX-1.2/NOPB across temperature and load?
The LM2852YMXAX-1.2/NOPB has a factory-programmed 1.2 V output with guaranteed tolerance of ±2.7% (1.173 V to 1.227 V) over –40°C to 125°C junction temperature and full load range. This specification includes line, load, and temperature effects per TI SNVS325E datasheet Section 6.5.
Does LM2852YMXAX-1.2/NOPB require external compensation components?
No. LM2852YMXAX-1.2/NOPB integrates a type-three compensation network internally. External compensation is not supported or required-stability depends solely on using inductor and capacitor values within TI's specified ranges in Table 1 of the datasheet.
Can LM2852YMXAX-1.2/NOPB operate with PVIN lower than AVIN?
Yes. LM2852YMXAX-1.2/NOPB supports split-rail operation: PVIN must be ≤ AVIN and ≥1.5 V, while AVIN must be ≥2.85 V. This allows optimizing power FET drive (PVIN) separately from logic bias (AVIN), improving efficiency and noise isolation.
What is the minimum soft-start capacitor value allowed for LM2852YMXAX-1.2/NOPB?
The minimum soft-start capacitor for LM2852YMXAX-1.2/NOPB is 1 nF. Values below this risk uncontrolled startup behavior or current-limit triggering. TI recommends 2.7 nF for ~3 ms ramp time, as validated in typical application circuits (Figure 13 and Section 8.2.2.2).
Is LM2852YMXAX-1.2/NOPB pin-compatible with other LM2852 variants like LM2852XMXAX-1.2/NOPB?
No. LM2852YMXAX-1.2/NOPB (500 kHz) and LM2852XMXAX-1.2/NOPB (1500 kHz) share the same HTSSOP-14 pinout and package, but differ in internal oscillator frequency and recommended output filter components. Swapping requires redesigning L/C values per Table 1; no PCB change is needed, but electrical validation is mandatory.
LM2852YMXAX-1.2/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:
- 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:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2852YMXAX-1.2/NOPB FAQ
1.How can I place an order for LM2852YMXAX-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-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 LM2852YMXAX-1.2/NOPB reliable?
The price and inventory of LM2852YMXAX-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 LM2852YMXAX-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXAX-1.2/NOPB?
LM2852YMXAX-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-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 LM2852YMXAX-1.2/NOPB?
For technical support, including LM2852YMXAX-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-1.2/NOPB requirements.
6.How does Aetrix verify that LM2852YMXAX-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-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 LM2852YMXAX-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-1.2/NOPB?
All LM2852YMXAX-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-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 LM2852YMXAX-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXAX-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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