Texas Instruments LM2852YMXAX-3.0/NOPB

Overview

LM2852YMXAX-3.0/NOPB from Texas Instruments is a 2A synchronous buck regulator with fixed 3.0 V output, 500 kHz switching frequency, input voltage range of 2.85 V to 5.5 V, internal 60 mΩ PFET/NFET switches, and HTSSOP-14 package with exposed thermal pad. It delivers point-of-load power for FPGA core rails and portable computing systems requiring stable low-voltage regulation.

For engineers reviewing the LM2852YMXAX-3.0/NOPB datasheet, LM2852YMXAX-3.0/NOPB pinout, LM2852YMXAX-3.0/NOPB application, or LM2852YMXAX-3.0/NOPB equivalent, key selection criteria include verified 3.0 V factory-programmed output tolerance (±2.25%), 500 kHz switching frequency stability over temperature, soft-start capacitor programmability (1–50 nF), and thermal performance enabled by the exposed-pad HTSSOP-14 package.

Technical Context

The LM2852YMXAX-3.0/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 until output loading triggers normal regulation-preventing unintended operation while maintaining output voltage accuracy at the SNS pin via remote sensing.

Key Specifications

Pinout & Package

LM2852YMXAX-3.0/NOPB uses the 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (R_θJA = 39.2°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62231DRVR and MP2101DQ-LF-Z, the LM2852YMXAX-3.0/NOPB uniquely combines factory-programmed 3.0 V output, integrated type-three compensation, split-rail operation, and 2 A capability in a thermally enhanced HTSSOP-14 package - reducing component count, layout risk, and thermal derating effort in mid-power embedded systems.

Availability

LM2852YMXAX-3.0/NOPB is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and portable computing subsystems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for LM2852YMXAX-3.0/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 applications in portable, industrial, and communications equipment - emphasizing ease of use through factory-programmed outputs and on-chip compensation.

FAQ

What is the factory-programmed output voltage of the LM2852YMXAX-3.0/NOPB?

The LM2852YMXAX-3.0/NOPB has a factory-programmed output voltage of exactly 3.0 V, with a guaranteed tolerance of ±2.25% (2.9325 V to 3.0675 V) across –40°C to 125°C junction temperature. This fixed output eliminates the need for external feedback resistors and ensures consistent regulation without calibration - a key advantage over adjustable buck controllers. The 3.0 V setting is laser-trimmed during wafer test and cannot be modified in-circuit.

Does the LM2852YMXAX-3.0/NOPB support split-rail operation, and how does it affect layout?

Yes, the LM2852YMXAX-3.0/NOPB supports split-rail operation: AVIN powers the control logic (min 2.85 V), while PVIN supplies the internal power FETs (must be ≤AVIN). This requires separate decoupling - a 1-µF ceramic cap near AVIN and a low-ESR bulk capacitor (e.g., 22 µF) adjacent to PVIN pins. Layout must keep AVIN and PVIN traces isolated to prevent noise coupling into the error amplifier, and the exposed thermal pad must connect exclusively to PGND, not SGND.

What is the recommended soft-start capacitor value for the LM2852YMXAX-3.0/NOPB, and why is it limited to 1–50 nF?

The recommended soft-start capacitor for the LM2852YMXAX-3.0/NOPB is 2.7 nF, yielding ~3 ms startup time. The 1–50 nF range is enforced because the internal DAC charges this capacitor through a 400 kΩ resistor; values outside this window cause either uncontrolled inrush (too small) or excessive delay or instability during fault recovery (too large). The LM2852YMXAX-3.0/NOPB's SS pin also interfaces with internal short-circuit protection, which actively discharges CSS during faults - requiring capacitor stability across temperature and voltage.

How does the LM2852YMXAX-3.0/NOPB handle no-load or light-load conditions?

The LM2852YMXAX-3.0/NOPB employs switch node protection logic that disables PWM switching when output loading is below ~100 mA, maintaining regulation at the SNS pin via high-impedance feedback but drawing only 10 µA quiescent current. Switching resumes automatically once load exceeds threshold - preventing erratic behavior during power-up or standby. This differs from forced-PWM or DCM modes; it is a unique protection feature documented in Section 7.3.2 of the datasheet and validated across temperature.

Can the LM2852YMXAX-3.0/NOPB be used with ceramic output capacitors, and what ESR range is supported?

Yes, the LM2852YMXAX-3.0/NOPB supports ceramic output capacitors, but only within the ESR range specified for its 500 kHz version: 95–275 mΩ for 2.5 V output and 100–275 mΩ for 3.3 V output (per Table 1). While ceramics typically have <10 mΩ ESR, the LM2852YMXAX-3.0/NOPB's internal type-three compensation requires minimum ESR for loop stability. Using ultra-low-ESR ceramics without adding series resistance risks oscillation - confirmed by TI's stability testing and application note SNVA429.