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Texas Instruments LM2852YMXA-1.2/NOPB
- Part No.:
- LM2852YMXA-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.2/NOPB.pdf
- Description:
- IC REG BUCK 1.2V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:311
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Product details
Overview
LM2852YMXA-1.2/NOPB from Texas Instruments is a 2 A, 500 kHz synchronous buck regulator with factory-programmed 1.2 V output, operating from 2.85 V to 5.5 V input, featuring internal 60 mΩ MOSFETs, voltage-mode control, and integrated type-three compensation in an HTSSOP-14 package. It delivers high efficiency (>90% at 1 A, 3.3 VIN → 1.2 VOUT) for FPGA core power and portable computing point-of-load regulation.
For engineers reviewing the LM2852YMXA-1.2/NOPB datasheet, LM2852YMXA-1.2/NOPB pinout, LM2852YMXA-1.2/NOPB application, or LM2852YMXA-1.2/NOPB equivalent, key selection criteria include verified 500 kHz switching frequency, ±2.5% output voltage tolerance at 1.2 V, thermal shutdown at 165°C, soft-start programmability via external capacitor, and compatibility with ceramic or tantalum output capacitors per TI-recommended ranges.
Technical Context
The LM2852YMXA-1.2/NOPB implements voltage-mode PWM control with internal type-three compensation, eliminating external loop components. Its dual-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized input filtering and thermal management.
Switch node protection prevents abnormal operation during light-load conditions, while internal current limiting (2.25–3.65 A over temperature) and UVLO (2.85 V rising threshold) ensure robust startup and fault recovery. The device uses a fixed 500 kHz oscillator - distinct from the 1.5 MHz LM2852X variant - and supports split-rail operation with PVIN ≤ AVIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 1.2 V ±2.5% (0.03 V absolute tolerance), verified across –40°C to 125°C junction range. |
| Max Output Current | 2 A continuous load capability with internal PFET/NFET switches (75/55 mΩ typical RDS(on) at 25°C). |
| Switching Frequency | Fixed 500 kHz (LM2852Y variant), stable across temperature (325–625 kHz min/max), enabling compact magnetics. |
| Input Voltage Range | 2.85 V to 5.5 V on AVIN; PVIN must be ≤ AVIN and ≥1.5 V, supporting single- or dual-rail supply configurations. |
| Efficiency | 92% typical at 1 A, 3.3 VIN → 1.2 VOUT; >84% at 10 mA load, enabling low-power standby operation. |
| Quiescent Current | 0.85 mA typical non-switching IQ; 10 µA shutdown current (ISD), minimizing battery drain in portable systems. |
| Thermal Protection | Junction thermal shutdown at 165°C with 10°C hysteresis, and RθJA = 39.2°C/W in HTSSOP-14 package. |
Pinout & Package
LM2852YMXA-1.2/NOPB is housed in a thermally enhanced 14-pin HTSSOP (PWP) package with exposed pad (5.00 mm × 4.40 mm nominal body size), requiring solder connection of the exposed pad to PCB ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply input | Provides power to internal logic; must be ≥2.85 V and ≥PVIN; decoupling required near pin. |
| EN (Pin 2) | Enable control input | Internally pulled up; tie to GND to disable; VIH ≥75% AVIN, VIL ≤25% AVIN for reliable toggling. |
| SGND (Pin 3) | Signal ground reference | Reference for error amplifier and feedback circuitry; separate from PGND to reduce noise coupling. |
| SS (Pin 4) | Soft-start timing node | Connects to external capacitor (1–50 nF); sets startup ramp time; internal 400 kΩ resistor defines RC time constant. |
| PVIN (Pins 6,7) | Main power input rail | Supplies internal PFET/NFET switches; requires low-ESR bulk capacitance placed adjacent to pins. |
| SNS (Pin 14) | Output voltage sense input | High-impedance feedback node; connect directly to load for accurate regulation; avoid EMI-coupled routing. |
| SW (Pins 8,9) | Power switch node | Drives external inductor; high di/dt path requiring short, wide copper traces and minimized loop area. |
| PGND (Pins 10,11) | Power ground return | Low-impedance return for switch currents; connect to thermal pad and internal ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Type-Three Compensation | Eliminates need for external compensation network, reducing BOM count and layout sensitivity while ensuring stability across recommended L/C/ESR ranges. |
| Split-Rail Operation Support | Independent AVIN (logic) and PVIN (power) inputs enable optimized input filtering and thermal isolation between control and power stages. |
| Programmable Soft-Start | External capacitor on SS pin (1–50 nF) controls output ramp rate, preventing inrush current and enabling controlled sequencing in multi-rail systems. |
| Integrated Low-RDS(on) Switches | 75 mΩ PFET / 55 mΩ NFET (typical at 25°C) minimize conduction loss, supporting >90% efficiency at mid-load without external MOSFETs. |
| Robust Fault Protection | UVLO (2.85 V), thermal shutdown (165°C), and switch-node monitoring prevent damage during overvoltage, overtemperature, or no-load anomalies. |
Applications
| FPGA Core Power Supply | Portable Computing SoC Rail |
|---|---|
|
Use Scenario: Local 1.2 V supply for Xilinx Artix-7 FPGA core logic under dynamic load (0–1.8 A). IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise DC power with fast transient response. Use Value: Maintains 1.2 V ±2.5% under 100 mA/µs load steps; 92% efficiency reduces thermal load in space-constrained BGA packages. |
Use Scenario: Main SoC core rail in ARM-based tablet design with battery input (3.3–4.2 V). IC Role / Device Role / Timing Role: High-efficiency step-down converter powering CPU/GPU cores with adaptive voltage scaling support. Use Value: 10 µA shutdown current extends battery life; 500 kHz switching enables use of small 10–15 µH inductors and 100 µF ceramic output caps. |
| Industrial IoT Sensor Hub | Networking PHY Interface Power |
|
Use Scenario: Single-rail 1.2 V supply for ultra-low-power MCU + BLE radio subsystem in sealed environmental sensor node. IC Role / Device Role / Timing Role: Always-on buck regulator with low quiescent current and thermal resilience for unventilated enclosures. Use Value: 0.85 mA operating IQ and 39.2°C/W thermal resistance allow full 2 A operation at 85°C ambient without derating. |
Use Scenario: Dedicated 1.2 V rail for Ethernet PHY IC (e.g., DP83848) in industrial switch with PoE input. IC Role / Device Role / Timing Role: Point-of-load regulator rejecting ripple from upstream DC-DC stages and providing clean analog supply. Use Value: Internal compensation and 1.2 V factory trim eliminate calibration; SNS pin routing minimizes IR drop for <±1% load regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.8–6.0 V input; 1.2 V fixed output; 3 MHz switching; 0.6 A max; smaller 6-pin WSON package. | Lower current rating and higher frequency limit suitability to ultra-compact, low-power applications only. | Select when board space is critical and load ≤0.6 A; not suitable for 2 A FPGA core rails. |
| LM2678SD-1.2/NOPB | 4.5–40 V input; 1.2 V fixed output; 5 A max; external MOSFETs; 260 kHz switching; TO-263 package. | Higher input range and current capacity, but requires external power stage and compensation components. | Select for industrial 24 V input systems needing >2 A; adds complexity and footprint vs. integrated LM2852YMXA-1.2/NOPB. |
Compared with TPS62231DRVR and LM2678SD-1.2/NOPB, LM2852YMXA-1.2/NOPB uniquely balances 2 A capability, 500 kHz fixed frequency, factory-trimmed 1.2 V output, and full integration in HTSSOP-14 - making it optimal for mid-power portable and embedded point-of-load designs where efficiency, thermal performance, and BOM simplicity are prioritized.
Availability
LM2852YMXA-1.2/NOPB is available at Aetrix Electronics and suitable for FPGA core power, portable computing SoC rails, and industrial IoT sensor hub applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2852YMXA-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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LM2852 product line delivers highly integrated synchronous buck regulators targeting space-constrained, thermally sensitive applications in portable, networking, and industrial electronics - emphasizing ease of use through factory-programmed outputs and internal compensation.
FAQ
What is the exact output voltage tolerance of LM2852YMXA-1.2/NOPB across temperature?
The LM2852YMXA-1.2/NOPB has a factory-programmed 1.2 V output with guaranteed tolerance of ±2.5% (±30 mV) over the full –40°C to 125°C junction temperature range, as specified in Section 6.5 of the SNVS325E datasheet. At 25°C, typical deviation is ±0.027 V, and line/load regulation contribute ≤8 mV/A additional error under recommended conditions.
Does LM2852YMXA-1.2/NOPB require external compensation components?
No, LM2852YMXA-1.2/NOPB integrates a complete type-three compensation network internally. This eliminates external resistors and capacitors from the feedback loop, reducing design risk and component count. Stability is ensured only when using inductors and capacitors within the ranges specified in Table 1 of the datasheet for the 500 kHz (Y) variant.
Can LM2852YMXA-1.2/NOPB operate with PVIN lower than AVIN?
Yes - LM2852YMXA-1.2/NOPB supports true split-rail operation where PVIN may be set independently from AVIN, provided PVIN ≤ AVIN and both meet their respective minimums (PVIN ≥1.5 V, AVIN ≥2.85 V). This allows optimization of power-stage efficiency and logic-supply noise isolation, as detailed in Section 7.3.1 of the datasheet.
What is the recommended soft-start capacitor value for LM2852YMXA-1.2/NOPB?
The recommended soft-start capacitor for LM2852YMXA-1.2/NOPB is 2.7 nF, as validated in TI's Bill of Materials (Table 4) for 1.8 V variants and confirmed applicable to 1.2 V versions. This value yields ~3 ms startup time and falls within the supported 1–50 nF range. Ceramic dielectric (X7R/C0G) is preferred for stability and low ESR.
How does LM2852YMXA-1.2/NOPB handle light-load or no-load conditions?
LM2852YMXA-1.2/NOPB employs switch-node protection that may suppress switching during no-load or very light-load conditions to prevent instability. Once load exceeds ~10–20 mA, normal PWM operation resumes. This behavior is intentional and documented in Section 7.3.2; output regulation remains accurate regardless of switching activity.
LM2852YMXA-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:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2852YMXA-1.2/NOPB FAQ
1.How can I place an order for LM2852YMXA-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-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 LM2852YMXA-1.2/NOPB reliable?
The price and inventory of LM2852YMXA-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 LM2852YMXA-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.2/NOPB?
LM2852YMXA-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-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 LM2852YMXA-1.2/NOPB?
For technical support, including LM2852YMXA-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.2/NOPB requirements.
6.How does Aetrix verify that LM2852YMXA-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-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 LM2852YMXA-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.2/NOPB?
All LM2852YMXA-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-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 LM2852YMXA-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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