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Texas Instruments LM2852YMXA-1.3
- Part No.:
- LM2852YMXA-1.3
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.3.pdf
- Description:
- IC REG BUCK 1.3V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
LM2852YMXA-1.3 from Texas Instruments is a 2A synchronous buck regulator in HTSSOP-14 with 500kHz switching frequency, factory-set 1.3V output, 2.85–5.5V input range, and internal type-three compensation. It delivers high-efficiency point-of-load regulation for FPGA core supplies and portable computing power rails.
For engineers reviewing the LM2852YMXA-1.3 datasheet, LM2852YMXA-1.3 pinout, LM2852YMXA-1.3 application, or LM2852YMXA-1.3 equivalent, key selection criteria include output voltage accuracy (±2.2% at 1.3V), low standby current (10µA), integrated 60mΩ MOSFETs, soft-start control via external capacitor, and thermal shutdown at 165°C.
Technical Context
The LM2852YMXA-1.3 implements voltage-mode PWM control with an internal oscillator fixed at 500kHz and uses a dedicated AVIN bias rail to power logic independently of PVIN. Its error amplifier references a DAC-generated voltage scaled by a 200kΩ/200kΩ divider at the SNS pin, enabling precise 1.3V regulation.
It integrates PFET and NFET power switches (75mΩ/55mΩ typical RDS(on)), features internal type-three compensation, and includes UVLO with 85mV hysteresis on AVIN. The exposed-pad HTSSOP-14 package provides θJA = 38°C/W for thermal management under 2A continuous load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-programmed 1.3V ±2.2% (2.4437V–2.5563V tolerance applies only to 2.5V variant; per datasheet Table, 1.3V option has same ±2.2% relative tolerance) |
| Max Output Current | 2A continuous - supports FPGA/DSP core loads without external current boosting |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range but must be ≤ AVIN - enables single-rail or split-rail operation |
| Switching Frequency | 500kHz (±25% over temperature) - balances efficiency and EMI for mid-power applications |
| Quiescent Current | 0.85–2mA operating; 10–25µA shutdown - extends battery life in portable systems |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects against sustained overload or poor PCB heatsinking |
| Soft-Start Control | External CSS pin with 400kΩ internal resistor - 2.7nF yields ~3ms startup; prevents inrush into 100µF output caps |
Pinout & Package
LM2852YMXA-1.3 is housed in a 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed thermal pad soldered to PCB ground for enhanced thermal performance (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥ PVIN and within 2.85–5.5V; decoupling required |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; threshold is 25% (low) / 75% (high) of AVIN |
| SGND (3) | Signal ground reference | Reference for error amp and internal circuits; separate from PGND to reduce noise coupling |
| SS (4) | Soft-start timing node | Connects to external capacitor (1–50nF); controls output ramp rate and prevents current-limit startup |
| NC (5, 12, 13) | No-connect | Must be left floating or tied to GND; no internal connection - avoid routing signals here |
| PVIN (6, 7) | Main power input | Supplies PFET source; accepts 1.5–5.5V; requires low-ESR 22µF ceramic input cap placed adjacent |
| SNS (14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate remote sensing |
| SW (8, 9) | Power switch node | Drives external inductor; high di/dt node - minimize trace area to limit EMI |
| PGND (10, 11) | Power ground return | Low-impedance return path for PFET/NFET currents; tie to large internal ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power FETs | 60mΩ typical combined RDS(on) (75mΩ PFET + 55mΩ NFET) reduces external component count and conduction loss |
| Internal type-three compensation | Eliminates need for external compensation network - simplifies design and improves stability across recommended L/C ranges |
| Factory-set output voltage | 1.3V programmed at wafer level - avoids external resistor dividers and ensures tight initial accuracy |
| Low shutdown current | 10µA typical - critical for battery-backed systems requiring long-term standby without drain |
| Split-rail operation support | Independent AVIN (logic) and PVIN (power) inputs allow optimization of bias rail noise and efficiency separately |
Applications
| FPGA Core Power | DSP Local Regulation |
|---|---|
Use Scenario: Powering 1.3V I/O or auxiliary rails in Xilinx Artix-7 or Intel Cyclone V FPGAs during configuration and active operation. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering regulated 1.3V at up to 2A with fast transient response. Use Value: Internal compensation and 500kHz switching enable compact 10–15µH inductor + 68–100µF output capacitor solution meeting FPGA load-step requirements. |
Use Scenario: Supplying 1.3V core voltage to TI C674x DSPs in industrial motor control gateways with ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Point-of-load regulator with thermal shutdown and UVLO protection for mission-critical embedded processing. Use Value: 165°C thermal shutdown with 10°C hysteresis prevents latch-up during overload, while 10µA shutdown current preserves backup battery life. |
| Portable Computing Subsystem | Broadband Baseband Power |
Use Scenario: Generating 1.3V for USB 3.0 PHY or PCIe Gen2 SerDes blocks in ultrabook platform controllers. IC Role / Device Role / Timing Role: High-frequency buck regulator minimizing output ripple and EMI in noise-sensitive analog/RF sections. Use Value: 500kHz fixed frequency allows predictable filter design and avoids AM/FM band interference; SS pin enables controlled power sequencing. |
Use Scenario: Providing stable 1.3V to LTE baseband processors (e.g., Qualcomm MDM96xx) in small-cell infrastructure equipment. IC Role / Device Role / Timing Role: Industrial-grade DC-DC converter supporting -40°C to +125°C junction operation with robust fault handling. Use Value: AVIN/PVIN split-rail architecture isolates digital noise from analog power domains, improving ADC SNR in RF front-end subsystems. |
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 | Factory-set 1.2V output; identical 500kHz frequency, package, and feature set | Used where 1.2V core voltage is required (e.g., ARM Cortex-A9 SoCs); 100mV lower output than LM2852YMXA-1.3 | Select when system-level voltage margin analysis confirms 1.2V suffices and tighter initial tolerance is needed (1.2V option has same ±2.2% spec) |
| LM2852YMXA-1.5 | Factory-set 1.5V output; otherwise identical electrical and thermal specs | Applicable for 1.5V I/O banks or legacy ASIC cores; requires revalidation of output capacitor ESR limits per Table 1 | Choose if downstream logic requires 1.5V and board layout allows minor BOM change without redesign - same footprint and pinout |
Compared with LM2852YMXA-1.2 and LM2852YMXA-1.5, the LM2852YMXA-1.3 offers a non-standard but increasingly common 1.3V core voltage for next-gen low-power microcontrollers and interface PHYs, filling a gap between traditional 1.2V and 1.5V rails without sacrificing integration or thermal performance.
Availability
LM2852YMXA-1.3 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and portable computing subsystems requiring stable component supply with full RoHS compliance and traceable sourcing.
Supply support for LM2852YMXA-1.3 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 product line delivers SIMPLE SWITCHER® synchronous buck regulators optimized for low-component-count, high-efficiency point-of-load applications in space-constrained industrial and portable electronics.
FAQ
What is the output voltage tolerance of the LM2852YMXA-1.3?
The LM2852YMXA-1.3 has a factory-programmed 1.3V output with ±2.2% tolerance over temperature and line, derived from the same specification structure applied to other standard options (e.g., 1.2V, 1.5V, 2.5V) in the LM2852 family datasheet. This corresponds to 1.2714V to 1.3286V at TJ = 25°C, with full-range validation per Electrical Characteristics table.
Does the LM2852YMXA-1.3 support split-rail operation?
Yes, the LM2852YMXA-1.3 supports split-rail operation: AVIN powers the control logic (2.85–5.5V), while PVIN supplies the power FETs (1.5–5.5V). PVIN must be ≤ AVIN, and output filter components are selected based on PVIN value - enabling noise isolation and optimized efficiency in mixed-signal systems.
What is the recommended soft-start capacitor value for the LM2852YMXA-1.3?
The LM2852YMXA-1.3 uses the same SS pin architecture as the full LM2852 family: a 400kΩ internal resistor charges the external CSS capacitor. A 2.7nF capacitor yields ~3ms startup time (three RC time constants), matching TI's reference design for 1.5V/2.5V variants and confirmed valid for 1.3V operation per application note guidance.
Is the LM2852YMXA-1.3 pin-compatible with other LM2852Y variants?
Yes, all LM2852Y variants including LM2852YMXA-1.3 share identical HTSSOP-14 (PWP) packaging, pinout, and electrical interface. The only functional difference is the factory-programmed output voltage - enabling drop-in replacement across 0.8V–3.3V options without layout changes.
What thermal performance can be expected from the LM2852YMXA-1.3 in a standard 2-layer PCB?
In a standard 2-layer PCB with the exposed thermal pad fully soldered to a 1-in² internal ground plane, the LM2852YMXA-1.3 achieves θJA = 38°C/W. At 2A load and 5V input, this results in ~30°C junction rise above ambient - well below the 125°C max operating temperature, provided adequate airflow or enclosure ventilation is maintained.
LM2852YMXA-1.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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):
- 1.3V
- 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-1.3 FAQ
1.How can I place an order for LM2852YMXA-1.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-1.3 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-1.3 reliable?
The price and inventory of LM2852YMXA-1.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-1.3 is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.3?
LM2852YMXA-1.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-1.3 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-1.3?
For technical support, including LM2852YMXA-1.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.3 requirements.
6.How does Aetrix verify that LM2852YMXA-1.3 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-1.3 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-1.3 meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.3?
All LM2852YMXA-1.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-1.3, 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-1.3 part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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