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Texas Instruments LM2852YMXA-1.8
- Part No.:
- LM2852YMXA-1.8
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXA-1.8.pdf
- Description:
- IC REG BUCK 1.8V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
LM2852YMXA-1.8 from Texas Instruments is a 2 A synchronous buck regulator with factory-programmed 1.8 V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, and integrated 60 mΩ high-side/low-side MOSFETs. It delivers precise point-of-load regulation for FPGA core supplies in portable computing and networking infrastructure.
For engineers reviewing the LM2852YMXA-1.8 datasheet, LM2852YMXA-1.8 pinout, LM2852YMXA-1.8 application, or LM2852YMXA-1.8 equivalent, key selection criteria include verified 1.8 V ±2.25% output tolerance at full load, thermal performance in HTSSOP-14 (RθJA = 39.2°C/W), soft-start programmability via external capacitor, and compatibility with ceramic or tantalum output capacitors per TI's validated BOM.
Technical Context
The LM2852YMXA-1.8 implements voltage-mode control with internal Type-III compensation, eliminating external compensation components. Its split-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized efficiency across input ranges while maintaining strict output regulation under line and load transients.
Switch node protection logic disables PWM during light-load conditions to prevent erratic operation, and UVLO triggers at 2.85 V (rising) with 85–210 mV hysteresis. The device integrates current-limit sensing, thermal shutdown at 165°C (10°C hysteresis), and low 10 µA shutdown quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.25% (0.782–0.818 V tolerance band applies only to 0.8 V option; for 1.8 V: 1.7595–1.8405 V) |
| Max Output Current | 2 A continuous - supports FPGA/DSP core rails without external current boosting |
| Switching Frequency | 500 kHz (±275 kHz over temperature) - enables compact 10–15 µH inductors and 100–120 µF output capacitance |
| Input Voltage Range | 2.85 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V, and 5 V system rails |
| Efficiency @ 1.8 V/2 A | 92% typical at PVIN = 3.3 V, 90% at PVIN = 5.0 V - validated per Figure 2 and Table 1 in SNVS325E |
| Thermal Resistance | RθJA = 39.2°C/W (HTSSOP-14) - requires minimal copper area for 2 A operation at 125°C ambient |
| Shutdown Current | 10 µA at TJ = 25°C - enables battery-backed standby modes in portable systems |
Pinout & Package
LM2852YMXA-1.8 is housed in a thermally enhanced 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed pad for improved heat dissipation. Pin functions are validated per TI SNVS325E Rev E, Figure 5 (Top View).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Provides power to internal logic; must be ≥2.85 V and ≥PVIN; decoupling required near pin |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; threshold is 25% AVIN (low) / 75% AVIN (high) |
| SGND (Pin 3) | Signal ground reference | Reference for error amplifier and feedback network; separate from PGND to minimize noise coupling |
| SS (Pin 4) | Soft-start timing | Connects to external capacitor (1–50 nF); sets startup ramp time; 2.7 nF yields ~3 ms rise to 1.8 V |
| PVIN (Pins 6,7) | Main power input | Supplies internal PFET/NFET switches; must be ≤AVIN; high-current path requiring low-inductance layout |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate regulation; avoid switch-node proximity |
| SW (Pins 8,9) | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and minimized loop area |
| PGND (Pins 10,11) | Power ground return | Low-impedance return for switch currents; connect exposed pad and all PGND pins to solid ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output | 1.8 V fixed (no external resistor divider needed), reducing BOM count and layout sensitivity |
| Integrated power FETs | 60 mΩ (typ) high-side + 55 mΩ (typ) low-side MOSFETs - eliminates external switch losses and gate-drive complexity |
| Type-III internal compensation | Enables stable operation with standard 100–220 µF output capacitors without external compensation network |
| Split-rail operation | Independent AVIN/PVIN supplies allow optimization of logic bias and power-stage efficiency separately |
| Switch node protection | Prevents erratic startup or oscillation under no-load/light-load conditions by disabling PWM until load is applied |
Applications
| FPGA Core Power Supply | DSP Local Regulation |
|---|---|
|
Use Scenario: Providing tightly regulated 1.8 V to Xilinx Artix-7 FPGA core logic with dynamic current demand up to 2 A. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering low-noise, fast-transient response power with <100 mV droop during 1 A/µs load steps. Use Value: Eliminates need for external compensation or current-sense resistors, reducing solution size by >30% vs discrete controller + MOSFET designs. |
Use Scenario: Generating 1.8 V for TI C6748 DSP I/O and memory interface in industrial gateway equipment. IC Role / Device Role / Timing Role: Point-of-load regulator with soft-start control to prevent inrush current on hot-pluggable modules. Use Value: Achieves 92% efficiency at 2 A/3.3 V input, reducing thermal load in sealed enclosures without forced airflow. |
| Portable Computing Subsystem | Broadband Router PHY Power |
|
Use Scenario: Powering ARM Cortex-A9 subsystem (cache, L2, peripherals) in battery-powered edge compute devices. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from single-cell Li-ion (3.0–4.2 V) with ultra-low 10 µA shutdown current. Use Value: Extends battery runtime by >15% versus comparable 1.5 MHz parts due to lower gate charge losses at 500 kHz. |
Use Scenario: Supplying 1.8 V to Ethernet PHY ICs (e.g., DP83867) in multi-port Gigabit routers with strict EMI limits. IC Role / Device Role / Timing Role: Fixed-frequency PWM regulator with controlled EMI profile via 500 kHz fundamental and damped switch node. Use Value: Meets FCC Class B conducted emissions without additional filtering, verified in TI reference design TIDA-00275. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 1.8 V fixed, 3 MHz switching, 0.6 A max output, smaller 6-pin WSON package | Lower current capability; suited for microcontroller I/O rails, not FPGA cores | Select when board space is critical and load < 0.6 A; not drop-in for 2 A designs |
| LM2678SD-1.8/NOPB | 1.8 V fixed, 100 kHz, 5 A output, external MOSFETs, larger SO-8 package | Higher current, lower frequency, higher BOM count, less efficient at light loads | Select for high-reliability industrial use where thermal margin >50°C is required at 5 A |
Compared with TPS62231DRYT and LM2678SD-1.8/NOPB, LM2852YMXA-1.8 uniquely balances 2 A capability, 500 kHz efficiency, and integrated FETs in HTSSOP-14 - making it optimal for space-constrained, medium-power digital loads where thermal management and component count are co-priorities.
Availability
LM2852YMXA-1.8 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and portable computing subsystems requiring stable component supply across extended production lifecycles.
Supply support for LM2852YMXA-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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and communications markets.
The LM2852 product line delivers highly integrated, pin-compatible synchronous buck regulators targeting low-voltage, medium-current point-of-load applications where small footprint, thermal performance, and design simplicity are critical.
FAQ
What is the output voltage accuracy of LM2852YMXA-1.8 over temperature and load?
The LM2852YMXA-1.8 guarantees 1.8 V output within ±2.25% (1.7595 V to 1.8405 V) across –40°C to 125°C junction temperature and full 0–2 A load range, as specified in Section 6.5 of SNVS325E. This tolerance includes line, load, and temperature effects - no external trimming is required.
Can LM2852YMXA-1.8 operate with PVIN lower than AVIN, and what are the constraints?
Yes - LM2852YMXA-1.8 supports split-rail operation where PVIN may be lower than AVIN, but PVIN must never exceed AVIN. Per Section 7.3.1, PVIN must be ≥2.85 V and ≤AVIN; for PVIN < 3.3 V, TI recommends using output filter values validated for 3.3 V input per Table 1.
What soft-start capacitor value is recommended for LM2852YMXA-1.8, and why?
A 2.7 nF ceramic capacitor (e.g., Vishay VJ0805Y272KXXA) is recommended for LM2852YMXA-1.8, yielding ~3 ms startup time. This value falls within the validated 1–50 nF range (Section 8.2.2.3) and prevents current-limit startup by controlling DAC reference ramp rate, as confirmed in TI's BOM Table 4.
Does LM2852YMXA-1.8 require external compensation components?
No - LM2852YMXA-1.8 integrates a complete Type-III compensation network. As stated in Section 7.1 and validated in Section 8.2.2.4, stability is ensured with TI-recommended output capacitor (100–120 µF) and inductor (10–15 µH) values; no external op-amp or RC network is needed.
How does the switch node protection feature affect LM2852YMXA-1.8 behavior during no-load startup?
During no-load or light-load startup, LM2852YMXA-1.8's switch node protection disables PWM to prevent unstable operation. The output reaches 1.8 V, but switching only resumes once load current exceeds ~100 mA - a documented behavior in Section 7.3.2, not a fault condition.
LM2852YMXA-1.8 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):
- 1.8V
- 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
LM2852YMXA-1.8 FAQ
1.How can I place an order for LM2852YMXA-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXA-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 LM2852YMXA-1.8 reliable?
The price and inventory of LM2852YMXA-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 LM2852YMXA-1.8 is usually 5 days.
3.What payment methods are accepted for LM2852YMXA-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXA-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXA-1.8?
LM2852YMXA-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXA-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 LM2852YMXA-1.8?
For technical support, including LM2852YMXA-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXA-1.8 requirements.
6.How does Aetrix verify that LM2852YMXA-1.8 is sourced from the original manufacturer or authorized distributors?
All LM2852YMXA-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 LM2852YMXA-1.8 meets industry standards.
7.What is the process for return or replacement of LM2852YMXA-1.8?
All LM2852YMXA-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXA-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 LM2852YMXA-1.8 part is unused and in its original packaging.
Return procedure for LM2852YMXA-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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