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Texas Instruments LM2852YMXA-2.5
- Part No.:
- LM2852YMXA-2.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-2.5.pdf
- Description:
- IC REG BUCK 2.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,794
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Product details
Overview
LM2852YMXA-2.5 from Texas Instruments is a 2A synchronous buck regulator with fixed 2.5V output, 500kHz switching frequency, 2.85–5.5V input range, internal 60mΩ MOSFETs, and voltage-mode control in HTSSOP-14 package. It delivers stable point-of-load power for FPGA core rails and portable computing systems.
For engineers reviewing the LM2852YMXA-2.5 datasheet, LM2852YMXA-2.5 pinout, LM2852YMXA-2.5 application, or LM2852YMXA-2.5 equivalent, key selection criteria include output voltage accuracy (±2.23% over temperature), soft-start capacitor compatibility (2.7nF typical), thermal performance (θJA = 38°C/W), and HTSSOP-14 layout requirements for high-current SW/PGND paths.
Technical Context
The LM2852YMXA-2.5 implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its 500kHz fixed-frequency oscillator enables predictable EMI filtering and supports ceramic output capacitors down to 68µF with ≤275mΩ ESR.
It features dual internal MOSFETs (75mΩ PFET / 55mΩ NFET), programmable soft-start via SS pin (400kΩ internal resistor), and UVLO with 85mV hysteresis. The device operates across −40°C to +125°C junction temperature with thermal shutdown at 165°C and 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.23% (−40°C to +125°C), factory-trimmed for precision without external feedback resistors. |
| Max Load Current | 2A continuous output with internal current limit threshold of 3A (typical), supporting full-load operation without derating. |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range but must be ≤ AVIN - enables split-rail operation for optimized efficiency. |
| Switching Frequency | 500kHz (±25%) with ±100kHz variation over temperature - ensures consistent filter design and predictable ripple current. |
| Quiescent Current | 2mA (typ) during regulation; 10µA (max) in shutdown - minimizes standby power loss in battery-powered systems. |
| Thermal Resistance | θJA = 38°C/W with exposed pad soldered to PCB ground plane - requires thermal pad connection for full 2A capability. |
| Protection Features | UVLO (2.47V rising / 2.385V falling), thermal shutdown (165°C), and switch-node overvoltage protection - prevents damage under fault conditions. |
Pinout & Package
LM2852YMXA-2.5 is housed in a 14-pin HTSSOP package (PWP0014A) with exposed thermal pad. The package provides low thermal resistance (38°C/W) and supports high-current routing via dual PVIN, SW, and PGND pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides power to internal logic; must be ≥2.85V and ≥ PVIN - enables independent control rail for noise isolation. |
| EN (2) | Enable input | Internally pulled up; tie to GND to disable - allows system-level power sequencing without external pull-up. |
| SGND (3) | Signal ground reference | Separate from PGND; connects to error amp and sensing circuitry - requires star-ground connection to minimize noise coupling. |
| SS (4) | Soft-start control | Connects to 2.7nF capacitor; sets startup time (~3ms) by charging internal 400kΩ resistor - prevents inrush current and output overshoot. |
| NC (5, 12, 13) | No-connect | Must be left floating or tied to GND - no internal connection; avoids unintended parasitic coupling. |
| PVIN (6, 7) | Main power input | Dual pins reduce trace resistance for high di/dt currents - requires low-inductance path to input capacitor (e.g., 22µF ceramic). |
| SNS (14) | Output voltage sense | Remote sensing input; connect directly to load - compensates for IR drop in output traces to maintain ±2.23% regulation at load. |
| SW (8, 9) | Power switch node | Dual pins drive external inductor; carries full switching current - demands short, wide copper traces to minimize EMI and conduction loss. |
| PGND (10, 11) | Power ground return | Dual pins handle high pulsed currents from internal FETs - must connect to solid internal ground plane, separate from SGND. |
| Exposed Pad | Thermal & electrical ground | Must be soldered to PCB ground plane - primary thermal path; failure to connect degrades θJA and limits output current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network - reduces BOM count and layout sensitivity while ensuring stability with recommended L/C ranges. |
| Factory-Set Output Voltage | 2.5V trimmed at wafer level - removes need for external feedback resistors and associated tolerance stack-up errors. |
| Internal 60mΩ Power MOSFETs | Combined RDS(on) enables >90% efficiency at 2A/3.3VIN→2.5VOUT - avoids discrete FET gate-drive complexity and layout overhead. |
| Split-Rail Input Support | Independent AVIN and PVIN supplies - allows low-noise logic rail (e.g., 3.3V) while powering switches from higher-efficiency input (e.g., 5V). |
| Low Standby Current | 10µA max shutdown current - extends battery life in always-on subsystems such as real-time clocks or sensor interfaces. |
Applications
| FPGA Core Power | Portable Computing SoC |
|---|---|
|
Use Scenario: Supplying 2.5V core voltage to Xilinx Spartan-6 or Intel Cyclone IV FPGA banks with dynamic current demand up to 2A. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering tightly regulated voltage with fast transient response to logic switching events. Use Value: Maintains ±2.23% output accuracy across temperature and load, preventing timing violations and logic errors during high-speed operation. |
Use Scenario: Powering ARM Cortex-A9 application processors in handheld tablets where input is 3.3V from PMIC and output must be clean 2.5V. IC Role / Device Role / Timing Role: Local point-of-load converter minimizing voltage drop and noise coupling between main power rail and processor die. Use Value: Achieves 94% peak efficiency at 2A/3.3VIN, reducing thermal load and extending battery runtime without heatsink requirements. |
| Broadband Modem PHY | Industrial Sensor Node MCU |
|
Use Scenario: Providing 2.5V analog supply to ADSL/VDSL line driver ICs requiring low-noise, stable voltage under burst-mode data transmission. IC Role / Device Role / Timing Role: Low-EMI buck regulator with 500kHz fixed frequency enabling predictable filtering and compliance with EN55022 Class B emissions. Use Value: Soft-start (2.7nF CSS) prevents inrush-induced voltage sag on shared 3.3V rail, avoiding reset glitches in adjacent PHY sections. |
Use Scenario: Powering ultra-low-power microcontrollers (e.g., TI MSP430FR5994) in battery-operated environmental sensors with intermittent 2A peak loads. IC Role / Device Role / Timing Role: High-efficiency buck converter with 10µA shutdown current enabling multi-year operation on coin-cell batteries. Use Value: Thermal shutdown (165°C) and UVLO protection ensure reliable operation in unventilated enclosures exposed to ambient temperatures up to 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXA-2.5 | 1.5MHz switching frequency, higher quiescent current (0.85mA typ), tighter output tolerance (±1.5%), smaller inductor requirement (1µH vs 6.8µH). | Preferred for space-constrained designs needing smaller magnetics and faster transient response; less suitable for EMI-sensitive audio/RF sections. | Select LM2852XMXA-2.5 when board area is limited and 1.5MHz operation is acceptable; verify EMI compliance with target standards. |
| TPS62231DRVR | 3MHz switching frequency, 0.6V–5.5V adjustable output, 2.05A max, 17µA IQ, WSON-6 package (2mm × 2mm). | Supports adjustable output and higher switching frequency; lacks remote sense (SNS) and split-rail inputs, limiting precision in noisy environments. | Choose TPS62231DRVR for compact, cost-sensitive designs where fixed 2.5V is set via external resistors and remote sensing is unnecessary. |
Compared with LM2852XMXA-2.5 and TPS62231DRVR, the LM2852YMXA-2.5 offers superior thermal performance (38°C/W vs ≥60°C/W), integrated remote sensing, and split-rail flexibility - making it optimal for thermally demanding, precision-regulated applications where layout area is secondary to stability and accuracy.
Availability
LM2852YMXA-2.5 is available at Aetrix Electronics and suitable for FPGA core power, portable computing SoC supplies, and broadband modem PHY regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2852YMXA-2.5 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 IC design and manufacturing.
The LM2852YMXA-2.5 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator product line, engineered for minimal external component count, robust operation in industrial environments, and ease of implementation in point-of-load applications.
FAQ
What is the guaranteed output voltage tolerance for LM2852YMXA-2.5 over temperature?
The LM2852YMXA-2.5 guarantees output voltage within ±2.23% of 2.5V across the full operating junction temperature range of −40°C to +125°C, as specified in the Electrical Characteristics table under VOUT = 2.5V option. This tolerance reflects factory trimming and does not require external feedback components.
Can LM2852YMXA-2.5 operate with separate AVIN and PVIN supplies?
Yes, the LM2852YMXA-2.5 supports split-rail operation: AVIN powers the control logic (2.85V–5.5V), while PVIN supplies the power FETs (1.5V–5.5V). PVIN must be ≤ AVIN. This configuration isolates noise-sensitive logic from high-current switching paths, improving regulation accuracy in mixed-signal systems.
What soft-start capacitor value is recommended for LM2852YMXA-2.5?
A 2.7nF ceramic capacitor is the recommended soft-start capacitor (CSS) for LM2852YMXA-2.5, yielding approximately a 3ms startup time. The device's internal 400kΩ SS resistor forms an RC network with CSS; values between 1nF and 50nF are supported per datasheet specifications.
Does LM2852YMXA-2.5 require external compensation components?
No, the LM2852YMXA-2.5 integrates a complete type-three compensation network on-die. This eliminates external compensation components and simplifies design, provided output filter inductors (6.8–10µH) and capacitors (68–120µF, ≤275mΩ ESR) fall within the ranges specified in Table 1 of the datasheet.
What is the maximum continuous output current rating for LM2852YMXA-2.5?
The LM2852YMXA-2.5 is rated for 2A continuous output current under proper thermal conditions: PCB with fully soldered exposed pad, adequate copper area, and ambient temperature ≤85°C. Derating is required above 85°C ambient or with insufficient thermal management.
LM2852YMXA-2.5 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):
- 2.5V
- 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-2.5 FAQ
1.How can I place an order for LM2852YMXA-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-2.5 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-2.5 reliable?
The price and inventory of LM2852YMXA-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-2.5 is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-2.5?
LM2852YMXA-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-2.5 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-2.5?
For technical support, including LM2852YMXA-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-2.5 requirements.
6.How does Aetrix verify that LM2852YMXA-2.5 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-2.5?
All LM2852YMXA-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for LM2852YMXA-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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