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Texas Instruments LM2852YMXAX-1.5/NOPB
- Part No.:
- LM2852YMXAX-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2852YMXAX-1.5/NOPB.pdf
- Description:
- IC REG BUCK 1.5V 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,515
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Product details
Overview
LM2852YMXAX-1.5/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 1.5V output, 500 kHz switching frequency, 2.85–5.5V input range, internal 60-mΩ MOSFETs, and voltage-mode control. It delivers precise point-of-load regulation for FPGA core supplies in space-constrained industrial embedded systems.
For engineers reviewing the LM2852YMXAX-1.5/NOPB datasheet, LM2852YMXAX-1.5/NOPB pinout, LM2852YMXAX-1.5/NOPB application, or LM2852YMXAX-1.5/NOPB equivalent, key selection criteria include verified 1.5V factory-programmed output tolerance (±1.7%), thermal performance in HTSSOP-14 (RθJA = 39.2°C/W), soft-start capacitor compatibility (1–50 nF), and confirmed 2A continuous load capability at 125°C junction temperature.
Technical Context
The LM2852YMXAX-1.5/NOPB implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its split-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), enabling optimized input filtering and thermal management.
Switch node protection logic disables switching under no-load or light-load conditions to prevent shoot-through, resuming normal operation only when load current exceeds threshold. Internal UVLO triggers at 2.85V (rising) with 85–210mV hysteresis, ensuring reliable startup across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±1.7% (factory EEPROM-programmed; no external feedback required) |
| Max Output Current | 2 A continuous - supports full-rated load without derating up to 125°C junction temperature |
| Input Voltage Range | 2.85 V to 5.5 V - compatible with single-cell Li-ion, 3.3V, and 5V system rails |
| Switching Frequency | 500 kHz (±25%) - enables compact magnetics and balances EMI vs. efficiency trade-offs |
| Quiescent Current | 0.85 mA (typ) non-switching - minimizes standby power in always-on subsystems |
| Shutdown Current | 10 µA (typ) - ensures ultra-low leakage during system sleep modes |
| Internal FET RDS(on) | 75 mΩ PFET / 55 mΩ NFET (25°C) - reduces conduction loss and thermal stress at full load |
Pinout & Package
LM2852YMXAX-1.5/NOPB uses the 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground for enhanced heat dissipation (RθJC(bot) = 1.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 1) | Chip bias supply | Powers internal logic; must be ≥ PVIN and within 2.85–5.5V; decoupling critical for noise immunity |
| EN (Pin 2) | Enable control | Internally pulled up; tie to GND to disable; no external pull-up needed for default enable |
| SGND (Pin 3) | Signal ground reference | Separate from PGND to isolate analog feedback path from high-current return paths |
| SS (Pin 4) | Soft-start timing | Connects to 1–50 nF capacitor; sets controlled ramp time for output voltage (e.g., 2.7 nF ≈ 3 ms) |
| PVIN (Pins 6,7) | Main power input | Supplies internal power FETs; requires low-ESR bulk capacitor placed adjacent to pins |
| SNS (Pin 14) | Output voltage sense | High-impedance feedback node; connect directly to load for accurate remote sensing |
| PGND (Pins 10,11) | Power ground return | Low-inductance path for switch current; must tie to thermal pad and shared ground plane |
| SW (Pins 8,9) | Switch node | Drives external inductor; high di/dt node requiring short, wide traces to minimize EMI and losses |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed output | 1.5V set permanently in EEPROM - eliminates external resistor divider, saves board space, guarantees accuracy |
| Integrated type-three compensation | On-chip compensation network - removes need for external RC/Zobel networks, simplifies design validation |
| Split-rail operation | Independent AVIN/PVIN supplies - allows optimization of logic rail stability and power rail efficiency separately |
| Switch node protection | Automatic disable under no-load - prevents uncontrolled oscillation and improves reliability in intermittent-load applications |
| Exposed thermal pad | HTSSOP-14 package with bottom thermal pad - achieves 1.7°C/W junction-to-board resistance for sustained 2A operation |
Applications
| FPGA Core Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Regulating 1.5V core voltage for Xilinx Spartan-7 FPGA in programmable logic controller. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering stable 2A output with <1% load regulation over -40°C to 85°C ambient. Use Value: Factory-set 1.5V eliminates calibration overhead; 500 kHz switching enables use of 10–15 µH shielded inductors fitting 12 mm² footprint. | Use Scenario: Powering isolated CAN transceiver and microcontroller peripherals in DIN-rail mounted automation hardware. IC Role / Device Role / Timing Role: Local point-of-load regulator converting 5V backplane to 1.5V logic rail with fast transient response (<50 µs recovery). Use Value: Internal 60-mΩ FETs achieve >90% efficiency at 1A load, reducing thermal load on sealed enclosure; SS pin enables synchronized startup with system reset signal. |
| Portable Test Equipment | Medical Sensor Hub |
Use Scenario: Supplying 1.5V to ADC driver amplifiers and precision reference buffers in handheld multimeter. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator operating from single 3.7V Li-ion cell with dynamic load steps up to 1.8A. Use Value: 0.85 mA quiescent current extends battery life; soft-start capacitor (2.7 nF) prevents inrush-induced brownout during wake-from-sleep transitions. | Use Scenario: Providing clean 1.5V rail for low-power biosignal acquisition ASIC in wearable ECG monitor. IC Role / Device Role / Timing Role: Safety-critical power stage with thermal shutdown (165°C) and UVLO (2.85V) ensuring fail-safe behavior during battery depletion. Use Value: Exposed-pad HTSSOP package enables direct thermal coupling to metal housing; SNS pin routing to sensor IC ensures <10 mV output error at load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.5V fixed output, 3 MHz switching, 0.6–5.5V input, 0.65A max - smaller size but lower current rating | Targeted at ultra-compact, low-power applications (e.g., wearables); not suitable for 2A loads | Select when board area is constrained and load ≤0.65A; verify thermal margin with 0.65A derating curve |
| LM2678SD-1.5/NOPB | 1.5V fixed output, 63 kHz switching, 8–40V input, 5A max - higher voltage, lower frequency, larger inductor | Designed for industrial 24V input systems; incompatible with 3.3V/5V rails due to minimum input requirement | Select only for high-input-voltage (>8V) applications; avoid for low-voltage portable designs |
Compared with TPS62231DRVR and LM2678SD-1.5/NOPB, LM2852YMXAX-1.5/NOPB uniquely balances 2A capability, 500 kHz frequency, and 2.85V minimum input in a thermally optimized HTSSOP package - making it the only option validated for 1.5V FPGA core supplies in space- and thermal-limited industrial enclosures.
Availability
LM2852YMXAX-1.5/NOPB is available at Aetrix Electronics and suitable for FPGA core power, industrial PLC I/O modules, and portable test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2852YMXAX-1.5/NOPB 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 LM2852 product line delivers highly integrated synchronous buck regulators targeting space-constrained, thermally demanding point-of-load applications in industrial, computing, and communications infrastructure.
FAQ
What is the factory-programmed output voltage of the LM2852YMXAX-1.5/NOPB?
The LM2852YMXAX-1.5/NOPB has a factory-programmed output voltage of exactly 1.5 V, stored in on-chip EEPROM with guaranteed tolerance of ±1.7% (1.4663 V to 1.5337 V) across –40°C to 125°C junction temperature. This eliminates external feedback resistors and ensures consistent performance without calibration.
Does the LM2852YMXAX-1.5/NOPB require external compensation components?
No, the LM2852YMXAX-1.5/NOPB integrates a complete type-three compensation network internally. This eliminates the need for external capacitors or resistors in the feedback loop, reducing BOM count and layout complexity while maintaining stability across recommended output filter ranges (e.g., 10–15 µH inductor, 100–120 µF output capacitor).
What is the maximum continuous output current supported by the LM2852YMXAX-1.5/NOPB?
The LM2852YMXAX-1.5/NOPB supports 2 A continuous output current under recommended operating conditions (TJ ≤ 125°C, PVIN = 3.3–5.5 V). This rating is validated with the HTSSOP-14 package's thermal characteristics (RθJA = 39.2°C/W) and internal 75 mΩ/55 mΩ MOSFETs, with peak current limit set at 3.0 A (25°C).
How does the soft-start function work on the LM2852YMXAX-1.5/NOPB?
The LM2852YMXAX-1.5/NOPB uses an internal DAC current source (400 kΩ effective resistance) charging an external capacitor on the SS pin to control output voltage ramp rate. A 2.7 nF capacitor yields ~3 ms startup time (95% of final value), preventing inrush current and enabling sequencing with other rails. Capacitor values must stay within 1–50 nF per datasheet specification.
Is the LM2852YMXAX-1.5/NOPB pin-compatible with other LM2852 variants like the LM2852XMXAX-1.5/NOPB?
No, the LM2852YMXAX-1.5/NOPB (500 kHz version) and LM2852XMXAX-1.5/NOPB (1.5 MHz version) share identical pinout and package (HTSSOP-14), but differ in switching frequency, current limit thresholds, and recommended output filter component values. Substituting one for the other requires re-optimizing inductor and capacitor selections per Table 1 in the datasheet.
LM2852YMXAX-1.5/NOPB 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:
- Active
- 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
LM2852YMXAX-1.5/NOPB FAQ
1.How can I place an order for LM2852YMXAX-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2852YMXAX-1.5/NOPB 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-1.5/NOPB reliable?
The price and inventory of LM2852YMXAX-1.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2852YMXAX-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM2852YMXAX-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2852YMXAX-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2852YMXAX-1.5/NOPB?
LM2852YMXAX-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2852YMXAX-1.5/NOPB 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-1.5/NOPB?
For technical support, including LM2852YMXAX-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2852YMXAX-1.5/NOPB requirements.
6.How does Aetrix verify that LM2852YMXAX-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2852YMXAX-1.5/NOPB 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-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM2852YMXAX-1.5/NOPB?
All LM2852YMXAX-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2852YMXAX-1.5/NOPB, 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-1.5/NOPB part is unused and in its original packaging.
Return procedure for LM2852YMXAX-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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