Texas Instruments LM2773TL/NOPB

Overview

LM2773TL/NOPB from Texas Instruments is a switched-capacitor step-down regulator delivering selectable 1.8V or 1.6V output with ±2% regulation, supporting up to 300mA load current across 2.5V–5.5V input range. It employs spread-spectrum 1.15MHz switching and dual-gain (2/3× or 1×) charge-pump architecture to achieve <10mV output ripple at full load, targeting low-noise power for portable memory and DSP subsystems.

For engineers reviewing the LM2773TL/NOPB datasheet, LM2773TL/NOPB pinout, LM2773TL/NOPB application, or LM2773TL/NOPB equivalent, key selection criteria include its DSBGA-9 package footprint, SEL-pin voltage-mode selection, shutdown disconnect functionality, and inductorless design enabling ultra-compact PCB layouts in space-constrained mobile electronics.

Technical Context

The LM2773TL/NOPB implements a two-phase regulated charge pump with non-overlapping internal clocking, using external flying capacitors C1 and C2 to transfer charge between VIN and VOUT. Its gain control dynamically switches between 1× (VIN ≤3.5V in 1.8V mode) and 2/3× (VIN >3.5V) to maintain high efficiency across input voltage variation.

At light loads (<40mA), it transitions to PFM mode to reduce ripple while preserving >75% efficiency at 300mA in 1.8V mode. Spread-spectrum modulation distributes EMI energy across frequency band, and integrated soft-start limits inrush current during enable.

Key Specifications

Pinout & Package

LM2773TL/NOPB uses a 0.5mm-pitch, 1.511mm × 1.511mm × 0.6mm DSBGA-9 package (TI package code YZR0009), suitable for fine-pitch automated assembly in ultra-thin portable devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS60403DBVR and MAX8814EUB+T, LM2773TL/NOPB uniquely delivers 300mA at either 1.6V or 1.8V in a 1.5mm² DSBGA package with lowest output ripple and integrated shutdown disconnect - making it optimal for next-generation portable SoC power domains demanding precision, density, and battery longevity.

Availability

LM2773TL/NOPB is available at Aetrix Electronics and suitable for mobile phone baseband power, digital camera sensor bias, portable music player DAC supply, and wearable MCU core rail applications requiring stable component supply and long-term production continuity.

Supply support for LM2773TL/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, embedded processing, and connectivity technologies with decades of power management innovation.

The LM2773TL/NOPB belongs to TI's low-noise switched-capacitor regulator product line, engineered specifically for space- and noise-constrained portable electronics needing efficient, inductor-free DC/DC conversion.

FAQ

What output voltages does the LM2773TL/NOPB support, and how is selection controlled?

The LM2773TL/NOPB supports two precise output voltages: 1.8V (SEL pin held LOW) or 1.6V (SEL pin held HIGH), both regulated to ±2% over line, load, and temperature. An internal 350kΩ pull-down resistor on the SEL pin ensures default 1.8V operation at power-up unless actively driven high. This binary selection eliminates external feedback resistors and simplifies layout in dual-voltage systems.

Does the LM2773TL/NOPB require external inductors, and what capacitors are mandatory?

No, the LM2773TL/NOPB is an inductorless switched-capacitor regulator requiring four external MLCCs: one 1µF input capacitor (CIN), two 1µF flying capacitors (C1, C2), and one 4.7µF output capacitor (COUT). All must be X5R/X7R dielectric, low-ESR ceramics (≤15mΩ); polarized types like tantalum are prohibited due to reverse-bias risk during charge-pump cycling.

How does the LM2773TL/NOPB manage electromagnetic interference in sensitive RF environments?

The LM2773TL/NOPB integrates spread-spectrum clock dithering across its 1.15MHz switching frequency, distributing radiated energy over a wider bandwidth to reduce peak EMI amplitude. Combined with low-noise charge-pump topology and absence of magnetic fields from inductors, this enables direct placement near cellular/Wi-Fi modules without shielding - verified in TI's mobile reference designs.

What protection features are built into the LM2773TL/NOPB?

The LM2773TL/NOPB includes thermal shutdown (activates at 150°C, releases at 140°C), output short-circuit current limiting (500mA typical), and input overvoltage tolerance (6.0V absolute max). During shutdown triggered by EN pin or thermal event, VOUT is fully disconnected from VIN via internal switches, preventing backfeed and ensuring safe rail sequencing in multi-supply systems.

Can the LM2773TL/NOPB operate efficiently at very light loads, and how is that achieved?

Yes, the LM2773TL/NOPB maintains low output ripple (<12mV) and high efficiency at light loads (<40mA) by automatically entering Pulse Frequency Modulation (PFM) mode. In PFM, switching pauses until VOUT drops below regulation threshold, minimizing switching losses while preserving tight voltage control - eliminating need for external enable sequencing or load-switching circuitry.