Texas Instruments LM2852XMXA-1.8/NOPB

Overview

LM2852XMXA-1.8/NOPB from Texas Instruments is a 2 A synchronous buck regulator with fixed 1.8 V output, 1.5 MHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ PFET/NFET switches, and voltage-mode control. It delivers point-of-load power to FPGA core rails in portable computing systems.

For engineers reviewing the LM2852XMXA-1.8/NOPB datasheet, LM2852XMXA-1.8/NOPB pinout, LM2852XMXA-1.8/NOPB application, or LM2852XMXA-1.8/NOPB equivalent, key selection criteria include 1.5 MHz operation for compact filter design, HTSSOP-14 thermal performance, factory-programmed 1.8 V output, and integrated type-three compensation eliminating external compensation components.

Technical Context

The LM2852XMXA-1.8/NOPB implements voltage-mode PWM control with internal type-three compensation, enabling stable regulation without external loop components. Its split-rail architecture separates AVIN (logic bias) from PVIN (power FET supply), allowing optimized input filtering and thermal management.

Switch node protection logic disables switching under no-load or light-load conditions until load current exceeds threshold, preventing erratic startup behavior. Thermal shutdown activates at 165°C with 10°C hysteresis, and UVLO triggers at 2.85 V (rising) with 85–210 mV hysteresis.

Key Specifications

Pinout & Package

LM2852XMXA-1.8/NOPB uses a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck regulator applications.

Compared with LM2852YMXA-1.8/NOPB, the LM2852XMXA-1.8/NOPB reduces inductor volume by ~90% and improves light-load efficiency above 100 mA; versus TPS62231DRVR, it offers superior thermal performance via exposed-pad HTSSOP and robust split-rail operation for mixed-signal systems.

Availability

LM2852XMXA-1.8/NOPB is available at Aetrix Electronics and suitable for FPGA core power, portable SSD regulation, industrial IoT sensor hubs, and broadband networking infrastructure requiring stable component supply and long-term production continuity.

Supply support for LM2852XMXA-1.8/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 company specializing in analog, embedded processing, and power management ICs with broad industrial and automotive qualification.

The LM2852 product line delivers high-efficiency, high-frequency synchronous buck regulators for space-constrained point-of-load applications in portable and networking equipment.

FAQ

What is the recommended soft-start capacitor value for LM2852XMXA-1.8/NOPB?

The LM2852XMXA-1.8/NOPB datasheet specifies a typical soft-start capacitor of 2.7 nF for ~3 ms startup time. The allowable range is 1 nF to 50 nF; values outside this range may cause unstable startup or violate internal fault protection timing. Always verify startup behavior under worst-case temperature and input voltage conditions using the LM2852XMXA-1.8/NOPB in actual hardware.

Does LM2852XMXA-1.8/NOPB require external compensation components?

No, the LM2852XMXA-1.8/NOPB integrates a complete type-three compensation network internally. This eliminates the need for external resistors or capacitors in the feedback loop, reducing component count and layout complexity. However, output filter inductor and capacitor values must stay within ranges specified in Table 1 of the LM2852XMXA-1.8/NOPB datasheet to maintain phase margin and stability.

Can LM2852XMXA-1.8/NOPB operate with PVIN lower than AVIN?

Yes - the LM2852XMXA-1.8/NOPB supports split-rail operation where PVIN must be ≤ AVIN. For example, AVIN can be 5 V (for logic bias) while PVIN is 3.3 V (for power FETs). This configuration improves efficiency and thermal distribution. The LM2852XMXA-1.8/NOPB will not function if PVIN exceeds AVIN, and PVIN must remain ≥2.85 V per absolute maximum ratings.

What is the thermal performance of LM2852XMXA-1.8/NOPB in HTSSOP-14 package?

The LM2852XMXA-1.8/NOPB has R_θJA = 39.2°C/W in the HTSSOP-14 package with exposed pad soldered to a 1-in² 2-oz copper ground plane. Junction-to-board (R_θJB) is 20.1°C/W, confirming effective heat transfer through the pad. At 2 A load and 3.3 V input, typical power dissipation is ~240 mW, resulting in ~9.4°C rise above ambient - well within safe operating limits when proper PCB copper area is used.

Is LM2852XMXA-1.8/NOPB pin-compatible with LM2852YMXA-1.8/NOPB?

Yes, the LM2852XMXA-1.8/NOPB and LM2852YMXA-1.8/NOPB share identical HTSSOP-14 pinout, package dimensions, and terminal functions. They differ only in switching frequency (1.5 MHz vs 500 kHz) and associated internal current limit thresholds. No PCB changes are required when substituting between these variants, though output filter components must be reselected per frequency-specific recommendations in the LM2852XMXA-1.8/NOPB datasheet.