Texas Instruments LP5990TM-3.0/NOPB

LP5990TM-3.0/NOPB Texas Instruments Linear Regulator - Product Summary

The LP5990TM-3.0/NOPB is a highly compact, low-dropout, fixed-output linear voltage regulator designed and manufactured by Texas Instruments. Specifically configured for a 3V fixed output at up to 200mA output current capacity, the device is housed in a tiny 4-bump DSBGA package (0.4mm pitch, with dimensions under 1mm^2), making it ideal for size-restricted applications. At its core, the LP5990TM-3.0/NOPB is optimized to support battery-operated, portable systems such as smartphones and handheld electronic appliances that demand accurate voltage regulation, low power consumption, and minimal noise.

Engineers designing space-limited, dense board layouts, or looking for effective power management solutions within compact portable devices will find the LP5990TM-3.0/NOPB an attractive choice. The device delivers a fixed 3V regulated output from input voltages ranging between 2.2V and 5.5V, while maintaining high efficiency and minimal thermal dissipation.

LP5990TM-3.0/NOPB - Core Electrical Specifications

The electrical performance of the LP5990TM-3.0/NOPB is central to its appeal for demanding portable designs. Key specifications include:

Input voltage range: 2.2V to 5.5V

Fixed output voltage: 3.0V (±1% across temperature range)

Maximum output current: 200mA

Low dropout voltage: 160mV typical at 200mA load, max 0.25V

Extremely low quiescent current: 30µA (enabled), 10nA (disabled)

Output noise: 60µVRMS

Fast enable/disable response: 60µs start-up, 500µs shutdown

Power supply rejection ratio (PSRR): 55dB at 10kHz

Stable with small ceramic output capacitors (as small as 1.0µF, 0402 case)

The low dropout voltage enables direct powering of core circuits from single-cell batteries or other low-voltage rails with minimal efficiency loss. The regulator's precise output voltage and tight accuracy margins offer predictable, reliable power supply—a key requirement for high-performance analog, RF, and digital components.

LP5990TM-3.0/NOPB - Operational Characteristics

Several functional aspects distinguish the LP5990TM-3.0/NOPB in both design flexibility and reliability:

Logic-controlled enable feature allows dynamic power management and load switching in smart devices.

Comprehensive protection: integrated over-current protection, thermal shutdown, and short-circuit protection mechanisms substantially reduce the risk of device or downstream circuit damage under fault conditions.

Regulator remains stable without external load, increasing versatility across various design scenarios.

Rugged ESD rating and wide operating temperature range (-40°C to +85°C ambient, -40°C to +125°C junction) ensure robust operation in harsh or mobile use environments.

A notable advantage is the compatibility with standard, space-saving 0402 ceramic capacitors, resulting in minimal total solution footprint (<2.5mm^2 with recommended capacitors). This makes the LP5990TM-3.0/NOPB well-suited to demanding layouts where board space and weight are major constraints.

LP5990TM-3.0/NOPB - Typical Use Cases

This device is engineered primarily for battery-powered handheld systems. Typical application targets include:

Smartphones and cellular handsets

Hand-held information appliances and portable electronics

Power rail generation for analog/RF block isolation

Low-noise supply for sensitive audio, sensor, or display modules

In these contexts, the LP5990TM-3.0/NOPB’s low quiescent current and fast enable/disable support system power optimization, while the tight output voltage margin and high PSRR help protect sensitive circuits against upstream supply noise and fluctuations.

LP5990TM-3.0/NOPB - Package, Physical, and Environmental Details

Offered in the 4-bump DSBGA (Wafer-Level Chip-Scale Package), the LP5990TM-3.0/NOPB features a footprint of about 0.9mm x 0.9mm, making it optimal for ultra-compact PCBs. The package is defined for lead-free processes, with RoHS3 compliance, ensuring broad compatibility with hazardous substance regulations and green manufacturing standards.

Environmental specifications further include:

Moisture Sensitivity Level (MSL): 1 (unlimited)

REACH unaffected status for chemical compliance

Operating temperature: -40°C to +85°C ambient

For mechanical integration, alignment ordinals and careful handling are recommended during assembly, per TI guidelines. The device shows sensitivity to strong IR light sources, requiring consideration when designing for exposed or optically active environments.

LP5990TM-3.0/NOPB - Implementation Guidelines and PCB Integration

Effective implementation requires attention to several board-level aspects:

Capacitor selection: For stable operation, both input and output capacitors should be ceramic, typically X7R or X5R, with a minimum 1.0μF recommended value and ESR between 5mΩ to 500mΩ. The device remains stable with no external load.

Placement: Capacitance value drift under DC bias, temperature, and aging must be checked to ensure minimum requirements are met. Both capacitors should be placed within 1cm of the pins.

PCB practices: Low impedance ground returns and minimized input inductance are essential for stability. For applications with long leads or high input inductance, consider increasing input capacitance to at least 2.2μF.

Enable pin logic: Tie the enable pin to VIN if always-on operation is desired. Use compatible logic source levels for dynamic control.

Thermal considerations: Calculate allowable power dissipation based on thermal resistance (θJA) and ambient conditions to prevent derating or reduce junction temperature.

Design engineers should also be aware of the specific mounting techniques required for wafer-level packages and avoid exposure to strong IR light during device operation.

LP5990TM-3.0/NOPB - Alternative and Substitute Options

When evaluating alternatives to the LP5990TM-3.0/NOPB, engineers may consider other devices within the LP5990 series, offering outputs from 0.8V to 3.6V in 50mV steps to suit different supply rails. For design migration or broader system compatibility, consider:

LP5990TM-1.8/NOPB, LP5990TM-2.8/NOPB, LP5990TM-3.3/NOPB (other fixed voltage LP5990 variants)

Other compact, low-noise LDOs with similar power, accuracy, and footprint characteristics within Texas Instruments product lines

Devices with comparable PMOS-based CMOS technology, matched output current ratings, fast enable times, and robust protection features

Always confirm pinout compatibility and verify electrical minimums before substituting in existing board designs.

Conclusion

The LP5990TM-3.0/NOPB presents a compelling solution for demanding space-constrained portable electronics, merging accurate 3V output, 200mA current rating, very low dropout and quiescent current, and robust protection, all in a near-chip-scale wafer-level package. Its design supports modern engineering requirements for energy efficiency, miniaturization, and operational reliability. Careful attention to board layout, external capacitor choice, thermal and environmental constraints, and enable control logic will ensure optimal performance and lifetime reliability. For applications where minimal solution size, low noise, and flexible power management are critical, the LP5990TM-3.0/NOPB is a high-quality choice in the designer’s toolkit.