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Texas Instruments LM2852YMXA-1.5
- Part No.:
- LM2852YMXA-1.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.5.pdf
- Description:
- IC REG BUCK 1.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,339
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Product details
Overview
LM2852YMXA-1.5 from Texas Instruments is a 2A synchronous buck regulator in HTSSOP-14 package, operating at 500kHz switching frequency with factory-set 1.5V output, 2.85–5.5V input range, and internal 60mΩ MOSFETs. It delivers high efficiency for FPGA/DSP core power in portable computing and broadband infrastructure.
For engineers reviewing the LM2852YMXA-1.5 datasheet, LM2852YMXA-1.5 pinout, LM2852YMXA-1.5 application, or LM2852YMXA-1.5 equivalent, key selection criteria include its 500kHz fixed-frequency voltage-mode control, integrated type-three compensation, 10µA shutdown current, and thermal shutdown at 165°C with 10°C hysteresis.
Technical Context
The LM2852YMXA-1.5 implements voltage-mode PWM control with internal type-three compensation, eliminating external compensation components. Its 500kHz oscillator operates across −40°C to +125°C junction temperature, with soft-start controlled by an internal 400kΩ resistor charging an external capacitor (e.g., 2.7nF for ~3ms ramp).
It integrates complementary PFET/NFET power switches (75/55mΩ typical RDS(on)), UVLO with 85–210mV hysteresis on AVIN, and a dedicated SNS pin for remote output voltage sensing. The exposed-pad HTSSOP-14 package provides θJA = 38°C/W thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-programmed 1.5V ±1.7% (1.466V–1.534V) at TJ = −40°C to +125°C |
| Switching Frequency | Fixed 500kHz (±37.5kHz) - enables compact magnetics and predictable EMI profile |
| Max Load Current | 2A continuous - supports FPGA core rails and ASIC point-of-load applications |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range - compatible with 3.3V and 5V system rails |
| Quiescent Current | 0.85–2mA non-switching; 10–25µA in shutdown - extends battery life in portable systems |
| Thermal Shutdown | Activates at 165°C with 10°C hysteresis - prevents permanent damage during overload or poor heatsinking |
| Peak Current Limit | 2.25–3.65A - protects internal FETs during startup or short-circuit events |
Pinout & Package
LM2852YMXA-1.5 uses a 14-pin HTSSOP package (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 control logic; must be ≥2.85V; can be tied to PVIN or separate rail |
| EN (2) | Enable input | Internally pulled up; connect to GND to disable; floating or AVIN enables operation |
| SGND (3) | Signal ground reference | Reference for error amplifier and internal circuits; separate from PGND for noise isolation |
| SS (4) | Soft-start control | Connects to external capacitor (1–50nF); sets output ramp time via internal 400kΩ resistor |
| 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 PFET source; high-current path requiring low-inductance layout |
| SW (8,9) | Switch node | Drives external inductor; high dv/dt node requiring short, wide trace routing |
| PGND (10,11) | Power ground return | Return path for high-current switch and inductor; connect to large copper plane |
| SNS (14) | Output voltage sense | Remote feedback input; connect directly to load for accurate regulation under load transients |
| Exposed Pad | Thermal & electrical ground | Mandatory connection to PCB ground plane for thermal dissipation and signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network - reduces BOM count and design cycle time |
| Internal 60mΩ Power FETs | Enables high-efficiency conversion without external MOSFET drivers or discrete switches |
| 500kHz Fixed Switching Frequency | Optimizes size vs. efficiency trade-off for mid-power applications using standard 10–15µH inductors |
| Low 10µA Shutdown Current | Minimizes system standby power - critical for always-on portable and IoT devices |
| Exposed-Pad HTSSOP-14 Package | Delivers 38°C/W thermal resistance - supports 2A continuous load without forced air or heatsink |
Applications
| Point-of-Load FPGA Core Supply | Portable Computing DC-DC Conversion |
|---|---|
Use Scenario: Regulating 1.5V core voltage for Xilinx Spartan-6 or Intel Cyclone IV FPGA in battery-powered edge devices. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering tightly regulated 1.5V at up to 2A with fast transient response. Use Value: Achieves >92% efficiency at 1A load with 3.3V input, reducing thermal load and extending runtime versus linear regulators. | Use Scenario: Powering ARM Cortex-A9 processor cores in ruggedized tablets or handheld test equipment. IC Role / Device Role / Timing Role: Main system PMIC buck stage providing stable 1.5V rail with soft-start sequencing and thermal protection. Use Value: Internal compensation and 500kHz operation enable compact 1210-size output capacitors and 10µH inductors, saving board space. |
| Broadband Networking PHY Power | DSP-Based Signal Processing Module |
Use Scenario: Supplying 1.5V to Ethernet PHY ICs (e.g., TI DP83848) in enterprise switches with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise, fixed-frequency buck regulator with remote sensing to maintain <±1.7% output accuracy under dynamic load steps. Use Value: 10µA shutdown current and UVLO hysteresis prevent brownout-induced resets during input rail fluctuations. | Use Scenario: Generating 1.5V core supply for TI C6748 DSP in real-time audio processing hardware. IC Role / Device Role / Timing Role: High-reliability buck regulator with thermal shutdown and current limiting for mission-critical embedded systems. Use Value: Exposed-pad HTSSOP package sustains 2A load at 85°C ambient without derating, ensuring robust field operation. |
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-1.5 | 1.5MHz switching frequency; identical 1.5V output, package, and pinout | Requires smaller inductor (1–10µH) and ceramic output capacitors; higher switching losses at heavy loads | Select for space-constrained designs needing minimal inductor size; verify thermal performance at full 2A load |
| TPS54202DRCT | 2A, 4.5–17V input, adjustable output via resistor divider; 500kHz sync buck with light-load efficiency mode | Wider VIN range and adjustable VOUT; lacks factory-programmed 1.5V option and integrated compensation | Choose when input exceeds 5.5V or output voltage flexibility is required; adds external resistors and compensation components |
Compared with LM2852XMXA-1.5 and TPS54202DRCT, the LM2852YMXA-1.5 offers optimal balance of fixed 1.5V simplicity, integrated compensation, and proven 500kHz efficiency for 2.85–5.5V input systems - minimizing design risk and component count without sacrificing thermal margin.
Availability
LM2852YMXA-1.5 is available at Aetrix Electronics and suitable for FPGA core supplies, portable computing power rails, and broadband networking PHY regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2852YMXA-1.5 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 ICs.
The LM2852 product line belongs to TI's SIMPLE SWITCHER® family, designed specifically for simplified, reliable DC-DC buck conversion in space- and cost-sensitive applications without compromising performance or thermal robustness.
FAQ
What is the output voltage tolerance of the LM2852YMXA-1.5 over temperature and load?
The LM2852YMXA-1.5 has a guaranteed output voltage tolerance of ±1.7% (1.466V to 1.534V) across the full operating junction temperature range of −40°C to +125°C and load currents from 0A to 2A. This specification is ensured by factory trimming and applies under closed-loop conditions measured at the SNS pin.
Does the LM2852YMXA-1.5 require external compensation components?
No, the LM2852YMXA-1.5 features fully integrated type-three compensation, eliminating the need for external resistors or capacitors in the feedback loop. This simplifies design, reduces BOM count, and ensures stability when used with recommended output filter components (e.g., 10–15µH inductor and 100µF capacitor).
What is the maximum allowable input voltage for the LM2852YMXA-1.5?
The absolute maximum rating for AVIN and PVIN pins is 6.5V, but the functional operating range is limited to 2.85V to 5.5V per the datasheet. Operating above 5.5V risks exceeding safe operating area limits and may cause premature device failure, even if within absolute max ratings.
How does the soft-start function work on the LM2852YMXA-1.5?
The LM2852YMXA-1.5 uses an internal 400kΩ resistor to charge an external capacitor connected to the SS pin. With a typical 2.7nF capacitor, the output ramps to 1.5V in approximately 3ms. The soft-start circuit also engages during fault recovery (e.g., after short-circuit removal) to prevent inrush current.
Can the LM2852YMXA-1.5 operate with split-rail inputs (separate AVIN and PVIN)?
Yes, the LM2852YMXA-1.5 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 not exceed AVIN, and output filter component selection must be based on the PVIN value used in the design.
LM2852YMXA-1.5 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):
- 1.5V
- 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-1.5 FAQ
1.How can I place an order for LM2852YMXA-1.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-1.5 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-1.5 reliable?
The price and inventory of LM2852YMXA-1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-1.5 is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.5 transactions.
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4.How is shipping managed for LM2852YMXA-1.5?
LM2852YMXA-1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-1.5 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-1.5?
For technical support, including LM2852YMXA-1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.5 requirements.
6.How does Aetrix verify that LM2852YMXA-1.5 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-1.5 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-1.5 meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.5?
All LM2852YMXA-1.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-1.5, 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-1.5 part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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