Texas Instruments LM2750LD-ADJ

Overview

LM2750LD-ADJ from Texas Instruments is a regulated switched-capacitor boost regulator in a 10-pin WSON (3mm × 3mm) package, delivering adjustable 3.8V–5.2V output with ±4% regulation, 1.7MHz fixed switching frequency, and up to 120mA output current at VIN ≥ 2.9V. It serves as a low-noise, inductorless power supply for space-constrained Li-ion–powered systems requiring clean 5V rail generation.

For engineers reviewing the LM2750LD-ADJ datasheet, LM2750LD-ADJ pinout, LM2750LD-ADJ application, or LM2750LD-ADJ equivalent, key selection considerations include its pre-regulated architecture minimizing input ripple, FB pin-based output programming, thermal shutdown at 150°C, 2µA shutdown current, and compatibility with only three external ceramic capacitors (CIN/COUT/CFLY).

Technical Context

The LM2750LD-ADJ implements a two-phase non-overlapping switched-capacitor doubler with internal pre-regulation-modulating input-switch on-resistance before voltage doubling to suppress input current ripple. Its feedback pin (FB) references a precise 1.232V (typ.) bandgap voltage, enabling programmable VOUT via external resistor divider (R1/R2).

Operation requires exactly three MLCCs: 2.2µF CIN, 2.2µF COUT, and 1µF CFLY. Output resistance is dominated by switch resistance (~5Ω typ.), limiting regulation margin at high IOUT; thermal shutdown engages at TJ = 150°C (typ.) and releases at 130°C (typ.), supported by the WSON package's 55°C/W θJA.

Key Specifications

Pinout & Package

LM2750LD-ADJ uses a 10-pin WSON (NGY0010A/DSC0010A) package with exposed die-attach pad (DAP) for thermal dissipation. The DAP must be soldered to a PCB ground plane with multiple thermal vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar switched-capacitor boost regulator applications.

Compared with LM2750LD-ADJ, TPS60403DBVR offers smaller footprint but sacrifices adjustability and current drive; MAX682ESA+ matches current capability but lacks FB control and adds 12× higher shutdown current-making LM2750LD-ADJ optimal for battery-sensitive, tunable 5V rail generation.

Availability

LM2750LD-ADJ is available at Aetrix Electronics and suitable for white LED backlighting, cellular SIM card power, audio amplifier bias, and general-purpose Li-ion-to-5V conversion requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for LM2750LD-ADJ 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.

The LM2750 product line delivers compact, low-noise switched-capacitor boost solutions for battery-powered portable electronics where inductor elimination, minimal EMI, and tight output regulation are critical design requirements.

FAQ

What output voltage range does the LM2750LD-ADJ support, and how is it set?

The LM2750LD-ADJ supports an output voltage range of 3.8V to 5.2V, programmed externally using a resistor divider connected to the FB pin. The relationship is VOUT = 1.23V × (1 + R1/R2), with R1 + R2 recommended between 15kΩ and 20kΩ. This allows precise tailoring of the output rail to match downstream load requirements without changing the IC itself-ensuring design flexibility across variants of the same end product. The LM2750LD-ADJ maintains ±4% regulation across its full operating range.

How many external components does the LM2750LD-ADJ require, and what are their values?

The LM2750LD-ADJ requires exactly three external ceramic capacitors: 2.2µF CIN (input), 2.2µF COUT (output), and 1µF CFLY (flying). These must be low-ESR MLCCs-such as TDK C2012X7R1A225K (2.2µF) and C1608X5R1A105K (1µF)-to ensure stable regulation, low ripple (<4mV_p-p), and thermal reliability. No inductor or additional compensation components are needed, reducing total solution size and cost. The LM2750LD-ADJ's architecture is optimized specifically for these values.

What is the maximum output current capability of the LM2750LD-ADJ, and under what conditions?

The LM2750LD-ADJ delivers up to 120mA output current when VIN is 2.9V or higher, and up to 40mA when VIN drops to 2.7V–2.9V. This stepped current rating reflects internal pre-regulator headroom and thermal limits. At 120mA, typical output resistance is ~5Ω, causing predictable droop per VOUT = 2×VIN − IOUT × ROUT outside regulation. The LM2750LD-ADJ includes overcurrent protection (300mA typ.) and thermal shutdown (150°C) to prevent damage under sustained overload.

Does the LM2750LD-ADJ include power-saving features for battery-operated devices?

Yes-the LM2750LD-ADJ features active-low shutdown (SD) with <2µA supply current in shutdown mode, plus a tightly controlled soft-start (500µs typ.) that limits inrush current during turn-on. These features directly extend battery life in portable applications such as wearables and handhelds. The LM2750LD-ADJ also achieves 85% peak efficiency and 70% average efficiency across the Li-ion input range (2.9V–4.2V), minimizing wasted energy as heat-critical for thermally constrained enclosures.

What package type and thermal characteristics does the LM2750LD-ADJ use?

The LM2750LD-ADJ is housed in a 10-pin WSON package (3mm × 3mm, NGY0010A/DSC0010A) with an exposed die-attach pad (DAP) for enhanced thermal conduction. Its junction-to-ambient thermal resistance (θJA) is 55°C/W under JEDEC-standard 4-layer board conditions. The DAP must be soldered to a solid ground plane with ≥4 thermal vias to maintain safe operation at full load. This package enables high power density without derating in typical portable PCB layouts-and the LM2750LD-ADJ's thermal shutdown (150°C) provides fail-safe protection if thermal design margins are exceeded.