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Texas Instruments LM2852YMXAX-1.8
- Part No.:
- LM2852YMXAX-1.8
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-1.8.pdf
- Description:
- IC REG BUCK 1.8V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,572
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Product details
Overview
LM2852YMXAX-1.8 from Texas Instruments is a 2A synchronous buck regulator in HTSSOP-14 with 500kHz switching frequency, factory-set 1.8V output (±2.25% tolerance), 2.85–5.5V input range, and internal 60mΩ PMOS/NMOS switches. It delivers stable core power to FPGA, DSP, and ASIC loads in portable computing and broadband infrastructure.
For engineers reviewing the LM2852YMXAX-1.8 datasheet, LM2852YMXAX-1.8 pinout, LM2852YMXAX-1.8 application, or LM2852YMXAX-1.8 equivalent, key selection criteria include output voltage accuracy at 1.8V, thermal performance of the exposed-pad HTSSOP package, soft-start capacitor sizing (2.7nF typical), and compatibility with ceramic output capacitors down to 100µF.
Technical Context
The LM2852YMXAX-1.8 uses voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its internal 60mΩ PMOS high-side and 55mΩ NMOS low-side switches enable high efficiency across 0–2A load range.
It operates with AVIN bias supply (2.85–5.5V) independent from PVIN power rail (1.5–5.5V), supports split-rail configuration, and features UVLO with 85mV hysteresis, thermal shutdown at 165°C, and current-limit protection at 2.25–3.65A peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V ±2.25% (factory EEPROM-trimmed; measured at SNS pin under closed-loop, non-switching conditions) |
| Max Output Current | 2A continuous; peak switch current limit 2.25–3.65A ensures safe startup and overload handling |
| Switching Frequency | 500kHz (±37.5kHz over temperature); enables compact 10–15µH inductors and 100–120µF ceramic output capacitors |
| Input Voltage Range | 2.85V to 5.5V on AVIN; PVIN supports 1.5V to 5.5V - allows flexible split-rail operation with AVIN ≥ PVIN |
| Efficiency | 94% typical at 3.3VIN/1.8VOUT/1A; >84% at full 2A load, enabling thermally constrained PCB layouts |
| Quiescent Current | 0.85–2mA operating; 10–25µA shutdown - supports battery-backed systems requiring ultra-low standby drain |
| Thermal Resistance | θJA = 38°C/W; exposed pad must be soldered to ground plane for rated 2A operation at 125°C junction |
Pinout & Package
LM2852YMXAX-1.8 is housed in a 14-pin HTSSOP package (Package Drawing PWP0014A) with exposed thermal pad. The package requires Type-1 MSL handling (260°C, 10 sec) and RoHS-compliant CU SN lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (1) | Chip bias supply | Provides logic power; must be ≥ PVIN and within 2.85–5.5V; internal UVLO referenced to this rail |
| EN (2) | Enable control | Internally pulled up; tie to GND to disable; VIH ≥ 75% AVIN, VIL ≤ 25% AVIN for reliable toggling |
| SGND (3) | Signal ground reference | Reference for error amplifier and internal circuitry; must connect to clean analog ground plane |
| SS (4) | Soft-start timing node | Connects to 1–50nF capacitor; 2.7nF yields ~3ms startup; internal 400kΩ resistor sets RC time constant |
| NC (5,12,13) | No-connect | Must remain unconnected or tied to GND; no internal connection; floating allowed per TI design guidelines |
| PVIN (6,7) | Main power input | Supplies internal PMOS switch source; accepts 1.5–5.5V; high-current path requiring low-inductance layout |
| SNS (14) | Output voltage sense | Feedback node; connect directly to load via Kelvin trace to maintain ±2.25% regulation accuracy at point-of-load |
| SW (8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and EMI-aware routing |
| PGND (10,11) | Power ground return | High-current return for NMOS switch and inductor; must tie to low-impedance ground plane under exposed pad |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.8V output | Eliminates external feedback resistors; guarantees ±2.25% initial accuracy without trimming or calibration |
| Integrated type-three compensation | Removes need for external compensation network; ensures stability with recommended L/C/ESR ranges (e.g., 10–15µH, 100–120µF, 100–200mΩ) |
| Internal 60mΩ PMOS / 55mΩ NMOS switches | Reduces BOM count and conduction losses; enables >94% efficiency at 1A with 3.3V input |
| Split-rail AVIN/PVIN operation | Allows AVIN to power control logic from a clean 3.3V rail while PVIN draws high current from noisy 5V bus |
| Exposed thermal pad (HTSSOP-14) | Enables θJA = 38°C/W when soldered to ≥1in² copper area; critical for sustained 2A operation at 125°C ambient |
Applications
| FPGA Core Power Supply | DSP Local Point-of-Load Regulation |
|---|---|
Use Scenario: Powers 1.8V I/O or auxiliary rails in Xilinx Spartan-7 or Intel MAX 10 FPGAs with dynamic current draw up to 2A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated 1.8V with fast transient response to logic switching events. Use Value: Factory-set 1.8V eliminates feedback resistor errors; 500kHz switching allows small 12µH inductors and 100µF ceramic output caps, reducing board area by >30% vs lower-frequency alternatives. |
Use Scenario: Supplies 1.8V core voltage to TI C674x or Analog Devices SHARC DSPs in audio processing modules with burst-mode workloads. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter managing rapid load transients during FFT computation bursts. Use Value: Internal 55mΩ NMOS switch and 2.25A current limit ensure stable 2A delivery without external current-sense components; soft-start prevents inrush into large DSP decoupling banks. |
| Broadband Router PHY Power | Portable SSD Controller Supply |
Use Scenario: Generates 1.8V for Ethernet PHY ICs (e.g., Marvell Alaska, Broadcom BCM54213) in enterprise edge routers with strict thermal limits. IC Role / Device Role / Timing Role: Compact, thermally robust buck regulator supporting 24/7 operation in confined chassis with limited airflow. Use Value: Exposed-pad HTSSOP package achieves 38°C/W θJA; 10µA shutdown current extends system-level sleep mode battery life in fanless designs. |
Use Scenario: Powers NVMe controller ICs (e.g., Phison E16, Silicon Motion SM2262) in M.2 SSDs where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: High-density, low-profile power stage delivering precise 1.8V under variable NAND flash access loads. Use Value: 2.7nF soft-start capacitor ensures controlled ramp to 1.8V without violating PCIe reset timing; 94% efficiency minimizes heat generation near NAND packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2852XMXAX-1.8 | 1.5MHz switching frequency; same 1.8V output, HTSSOP-14 package, but higher fosc (1050–1825kHz) and lower max load current (1.5A typical) | Requires smaller 1–10µH inductors and 10µF ceramic output caps; less suitable for high-current (>1.5A), low-EMI applications | Select LM2852XMXAX-1.8 only when board space is critical and load stays below 1.5A; LM2852YMXAX-1.8 remains preferred for full 2A capability and lower EMI. |
| TPS62231DRYT | 1.8V fixed-output, 2A buck with 3.5–6.5V input range, 3.6MHz switching, and 17µA quiescent current; WSON-6 package (2mm × 2mm) | Smaller footprint but no exposed thermal pad; lacks split-rail AVIN/PVIN support and internal soft-start capacitor scaling | Choose TPS62231DRYT for ultra-compact, low-IQ designs where thermal margin is sufficient and soft-start timing is managed externally. |
Compared with LM2852XMXAX-1.8 and TPS62231DRYT, LM2852YMXAX-1.8 uniquely balances 2A capability, 500kHz EMI profile, factory-trimmed 1.8V accuracy, and split-rail flexibility - making it optimal for thermally demanding, medium-power FPGA/DSP point-of-load designs.
Availability
LM2852YMXAX-1.8 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband PHY supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for LM2852YMXAX-1.8 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 LM2852YMXAX-1.8 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed specifically for space-constrained, thermally sensitive point-of-load applications in computing, communications, and industrial systems.
FAQ
What is the exact output voltage tolerance of the LM2852YMXAX-1.8?
The LM2852YMXAX-1.8 has a factory-trimmed output voltage of 1.8V with guaranteed tolerance of ±2.25% (1.7595V to 1.8405V) over –40°C to +125°C junction temperature, measured at the SNS pin in closed-loop, non-switching conditions per the SNVS325D datasheet.
Does the LM2852YMXAX-1.8 require external compensation components?
No, the LM2852YMXAX-1.8 integrates a complete type-three compensation network on-die. This eliminates external compensation resistors and capacitors, simplifying design and ensuring stability when used with recommended output filter values (e.g., 10–15µH inductor, 100–120µF capacitor, 100–200mΩ ESR).
Can the LM2852YMXAX-1.8 operate with separate AVIN and PVIN supplies?
Yes, the LM2852YMXAX-1.8 supports true split-rail operation: AVIN powers the control logic (2.85–5.5V), while PVIN supplies the power switches (1.5–5.5V). PVIN must always be ≤ AVIN; this configuration isolates noise-sensitive logic from high-current switching paths.
What soft-start capacitor value is recommended for the LM2852YMXAX-1.8?
A 2.7nF ceramic capacitor is the standard recommendation for the LM2852YMXAX-1.8 SS pin, yielding approximately 3ms startup time. The device supports 1–50nF; values outside this range may cause unreliable startup or violate fault recovery behavior during short-circuit events.
How is thermal performance ensured for the LM2852YMXAX-1.8 at full 2A load?
Thermal performance of the LM2852YMXAX-1.8 at 2A relies on soldering the exposed thermal pad to a minimum 1in² copper ground plane. With this layout, its θJA is 38°C/W, allowing operation up to +125°C junction temperature in ambient temperatures ≤ +85°C with adequate airflow or heatsinking.
LM2852YMXAX-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 1.8V
- 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
LM2852YMXAX-1.8 FAQ
1.How can I place an order for LM2852YMXAX-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-1.8 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 LM2852YMXAX-1.8 reliable?
The price and inventory of LM2852YMXAX-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXAX-1.8 is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXAX-1.8?
LM2852YMXAX-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-1.8 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 LM2852YMXAX-1.8?
For technical support, including LM2852YMXAX-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-1.8 requirements.
6.How does Aetrix verify that LM2852YMXAX-1.8 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-1.8 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 LM2852YMXAX-1.8 meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-1.8?
All LM2852YMXAX-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-1.8, 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 LM2852YMXAX-1.8 part is unused and in its original packaging.
Return procedure for LM2852YMXAX-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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