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Texas Instruments LM2852YMXA-1.0
- Part No.:
- LM2852YMXA-1.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.0.pdf
- Description:
- IC REG BUCK 1V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,165
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Product details
Overview
LM2852YMXA-1.0 from Texas Instruments is a 2A synchronous buck DC-DC regulator in HTSSOP-14 with exposed thermal pad, factory-set to 1.0V output, operating at 500kHz switching frequency, supporting 2.85–5.5V input and delivering ±2.25% output voltage accuracy over –40°C to +125°C. It powers FPGA core rails and low-voltage point-of-load systems.
For engineers reviewing the LM2852YMXA-1.0 datasheet, LM2852YMXA-1.0 pinout, LM2852YMXA-1.0 application, or LM2852YMXA-1.0 equivalent, key selection criteria include its fixed 1.0V output, internal type-III compensation, 10µA shutdown current, 60mΩ/55mΩ integrated MOSFETs, and thermal performance enabled by the exposed-pad HTSSOP package.
Technical Context
The LM2852YMXA-1.0 implements voltage-mode PWM control with an internal oscillator fixed at 500kHz and integrated type-III compensation network, eliminating external compensation components. Its dual-MOSFET power stage uses a 60mΩ PMOS high-side switch and 55mΩ NMOS low-side switch, enabling synchronous rectification for high efficiency across 0–2A load range.
It features dedicated AVIN (bias rail) and PVIN (power rail) inputs, separate signal (SGND) and power (PGND) grounds, and a precision SNS feedback node routed directly to the load. Soft-start is controlled via external capacitor on SS pin with 400kΩ internal pullup resistor, and enable logic accepts AVIN-referenced thresholds (VIH ≥75% AVIN, VIL ≤25% AVIN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-trimmed 1.0V ±2.25% (0.9775V to 1.0225V), measured at SNS pin in closed-loop configuration |
| Switching Frequency | Fixed 500kHz (±25% over temperature), enabling compact magnetics and predictable EMI profile |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports same range but must be ≤ AVIN for split-rail operation |
| Max Load Current | 2A continuous output with thermal derating above 85°C ambient, supported by exposed-pad HTSSOP package (θJA = 38°C/W) |
| Quiescent Current | 2mA typical operating current (non-switching); 10µA max shutdown current when EN = 0V |
| MOSFET RDS(on) | 75mΩ max PMOS high-side, 55mΩ max NMOS low-side at ISW = 2A and TJ = 25°C |
| Line Regulation | 0.2–0.6% over 2.85–5.5V AVIN range, ensuring stable 1.0V output despite input variation |
Pinout & Package
LM2852YMXA-1.0 is housed in a 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (θJA = 38°C/W). The package supports reflow per JEDEC Level-1 standards (260°C peak).
| 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; floating or AVIN-connected enables regulation |
| SGND (3) | Signal ground reference | Reference for error amplifier, soft-start, and feedback circuitry; separate from PGND |
| SS (4) | Soft-start timing | Connects to external capacitor (1–50nF); controls output ramp time via 400kΩ internal 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 high-current path to PMOS source; requires low-ESR input capacitor placed adjacent |
| SW (8, 9) | Power switch node | Drives external inductor; high di/dt node requiring short, wide trace and minimal loop area |
| PGND (10, 11) | Power ground return | Return path for high-current switches; connect to large copper pour or internal ground plane |
| SNS (14) | Output voltage sense | High-impedance feedback input; route directly to load with Kelvin connection to reject IR drop |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-III Compensation | Eliminates need for external compensation network, reducing BOM count and layout sensitivity |
| Internal 60mΩ PMOS / 55mΩ NMOS Switches | Enables >90% peak efficiency at 2A load without external MOSFETs or gate drivers |
| Dual Input Rails (AVIN/PVIN) | Allows optimization of bias and power paths-e.g., AVIN = 3.3V logic rail, PVIN = 5V bulk supply |
| 10µA Shutdown Quiescent Current | Supports ultra-low-power standby modes in battery-powered applications without external load switches |
| Thermal Shutdown with 10°C Hysteresis | Protects against sustained overload; resumes operation automatically after junction cools by ≥10°C |
Applications
| Processor Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-A series CPU cores requiring tightly regulated 1.0V at up to 2A with fast transient response. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering stable 1.0V from 3.3V or 5V intermediate bus. Use Value: Internal type-III compensation ensures stability with standard 100µF output capacitors, reducing design iteration time. | Use Scenario: Regulating I/O banks on Xilinx Artix-7 FPGAs where 1.0V is used for LVCMOS10 or differential standards. IC Role / Device Role / Timing Role: Dedicated low-noise, high-PG buck converter with Kelvin SNS sensing for accurate load-point regulation. Use Value: Dual ground pins (SGND/PGND) and exposed thermal pad minimize noise coupling and thermal stress during burst-mode operation. |
| Industrial Sensor Node Power | Portable Medical Diagnostic Module |
Use Scenario: Supplying 1.0V to ultra-low-power microcontrollers (e.g., MSP430FRxx) and analog front-ends in battery-operated sensors. IC Role / Device Role / Timing Role: Efficient step-down regulator with 10µA shutdown current extending battery life in sleep mode. Use Value: 500kHz fixed frequency allows predictable EMI filtering and avoids audible noise in sensitive measurement environments. | Use Scenario: Providing clean 1.0V rail to ADCs and precision op-amps in handheld ultrasound or ECG modules. IC Role / Device Role / Timing Role: Low-noise, thermally robust buck regulator with separate AVIN/PVIN for analog/digital domain isolation. Use Value: ±2.25% output tolerance and <0.6% line regulation ensure consistent analog reference accuracy across varying battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXA-1.0 | Same 1.0V output, but 1.5MHz switching frequency; higher switching losses at 2A, lower inductance requirement (1µH vs 10–15µH) | Better suited for space-constrained designs using ceramic output caps; less optimal for high-current, low-EMI industrial use | Select LM2852XMXA-1.0 only if board area is critical and 1.5MHz EMI can be filtered; otherwise LM2852YMXA-1.0 offers superior thermal and efficiency trade-offs at 2A |
| TPS62231DRYT | 1.0V fixed output, 3MHz switching, 0.65A max load, smaller 6-pin WSON package; no exposed thermal pad or dual-GND separation | Targeted at sub-1A portable applications; lacks thermal headroom and noise isolation for 2A industrial loads | Use TPS62231DRYT only for low-power, space-limited designs; LM2852YMXA-1.0 remains necessary for full 2A capability with thermal margin |
Compared with LM2852XMXA-1.0 and TPS62231DRYT, the LM2852YMXA-1.0 uniquely balances 2A delivery, thermal robustness via exposed pad, and noise-sensitive dual-ground architecture-making it the only option among the three qualified for sustained 2A operation in industrial and medical point-of-load applications.
Availability
LM2852YMXA-1.0 is available at Aetrix Electronics and suitable for FPGA core supplies, industrial sensor nodes, and portable medical diagnostic modules requiring stable component supply with full RoHS compliance and TI-qualified manufacturing traceability.
Supply support for LM2852YMXA-1.0 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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2852 product line delivers SIMPLE SWITCHER® synchronous buck regulators optimized for low-component-count, high-efficiency point-of-load conversion in space- and thermal-constrained applications-designed specifically for FPGA, DSP, and ASIC core voltage domains.
FAQ
What is the output voltage tolerance of the LM2852YMXA-1.0 over temperature and line conditions?
The LM2852YMXA-1.0 has a guaranteed output voltage tolerance of ±2.25% (0.9775V to 1.0225V) over the full –40°C to +125°C junction temperature range and 2.85V–5.5V AVIN input range. This specification is ensured by factory trimming and applies under closed-loop conditions measured at the SNS pin, not the output capacitor.
Does the LM2852YMXA-1.0 require external compensation components?
No, the LM2852YMXA-1.0 integrates a complete type-III compensation network on-die, eliminating the need for external resistors or capacitors in the feedback loop. Stability is ensured when using output filter components within the ranges specified in Table 1 of the SNVS325D datasheet-e.g., 10–15µH inductor and 68–120µF output capacitor for 1.0V output.
Can the LM2852YMXA-1.0 operate with separate AVIN and PVIN supplies?
Yes, the LM2852YMXA-1.0 supports split-rail operation: AVIN powers the control logic (2.85–5.5V), while PVIN supplies the power switches (same range, but must be ≤ AVIN). This allows optimizing noise isolation-for example, using a clean 3.3V AVIN rail and a noisier 5V PVIN bus-without compromising regulation accuracy or startup behavior.
What is the recommended soft-start capacitor value for the LM2852YMXA-1.0?
The LM2852YMXA-1.0 datasheet recommends a 2.7nF ceramic capacitor on the SS pin for ~3ms startup time. The soft-start range is restricted to 1–50nF due to internal protection circuitry that forces the SS voltage to track output during fault conditions like short-circuit or UVLO.
How does the LM2852YMXA-1.0 handle thermal overload?
The LM2852YMXA-1.0 includes thermal shutdown activation at 165°C junction temperature, with 10°C hysteresis. When triggered, the device halts switching and holds output in high-impedance state until junction temperature falls below 155°C, then resumes normal regulation without requiring an EN toggle or power cycle.
LM2852YMXA-1.0 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):
- 1V
- 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-1.0 FAQ
1.How can I place an order for LM2852YMXA-1.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-1.0 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-1.0 reliable?
The price and inventory of LM2852YMXA-1.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXA-1.0 is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.0?
LM2852YMXA-1.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-1.0 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-1.0?
For technical support, including LM2852YMXA-1.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.0 requirements.
6.How does Aetrix verify that LM2852YMXA-1.0 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-1.0 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-1.0 meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.0?
All LM2852YMXA-1.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-1.0, 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-1.0 part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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