Texas Instruments LP3995ITL-3.0/NOPB

Overview

LP3995ITL-3.0/NOPB from Texas Instruments is a micropower 150-mA CMOS low-dropout (LDO) voltage regulator with fixed 3.0 V output, 60 mV typical dropout at full load, ±3% output tolerance over −40°C to +125°C, and active shutdown enabling <1.5 µA quiescent current. It powers noise-sensitive RF/analog circuitry in portable wireless devices using ceramic capacitors as small as 1 µF.

For engineers reviewing the LP3995ITL-3.0/NOPB datasheet, LP3995ITL-3.0/NOPB pinout, LP3995ITL-3.0/NOPB application, or LP3995ITL-3.0/NOPB equivalent, key selection criteria include fast 30 µs turnon/175 µs turnoff timing, 25 µVRMS output noise (10 Hz–100 kHz), 60 dB PSRR at 1 kHz, and DSBGA-5 package compatibility with space-constrained PCB layouts.

Technical Context

The LP3995ITL-3.0/NOPB implements a CMOS-based LDO architecture with integrated bandgap reference, error amplifier, and pass transistor. Its BYPASS pin connects directly to the high-impedance node of the internal reference, enabling external 10 nF capacitor placement to suppress output noise without degrading transient response.

Enable control uses logic-level thresholds (VIH = 0.9 V, VIL = 0.4 V) to activate/deactivate regulation and engage an internal active discharge FET on the OUT pin during shutdown-ensuring rapid 175 µs turnoff and preventing residual charge holdup in downstream circuitry.

Key Specifications

Pinout & Package

LP3995ITL-3.0/NOPB is packaged in a 5-pin DSBGA (YZR) measuring 1.502 mm × 1.045 mm, optimized for ultra-compact portable designs. The exposed die pad is non-functional and may be left floating or connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL720F30 and MCP1700-3002E/TO, LP3995ITL-3.0/NOPB uniquely delivers sub-100 mV dropout, 25 µVRMS noise, and active discharge in a 1.5 mm × 1.0 mm DSBGA - making it the sole option for space-constrained, noise-sensitive, battery-optimized RF subsystems.

Availability

LP3995ITL-3.0/NOPB is available at Aetrix Electronics and suitable for GSM handsets, Bluetooth audio devices, portable medical sensors, and industrial IoT edge nodes requiring stable component supply, long-lifecycle support, and DSBGA packaging compatibility.

Supply support for LP3995ITL-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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets since 1930.

The LP3995ITL-3.0/NOPB belongs to TI's micropower LDO portfolio designed specifically for battery-powered portable equipment - emphasizing ultra-low noise, fast enable/disable, ceramic-capacitor compatibility, and minimal footprint.

FAQ

What is the minimum input voltage required for LP3995ITL-3.0/NOPB to maintain regulation at 150 mA load?

The LP3995ITL-3.0/NOPB requires a minimum input voltage of 3.06 V to sustain 3.0 V output at 150 mA, based on its 60 mV typical dropout voltage. Operation below this threshold causes output droop or dropout; design margin should account for worst-case 100 mV dropout across temperature and process variation.

Can LP3995ITL-3.0/NOPB operate without an output load?

Yes, LP3995ITL-3.0/NOPB remains stable and in regulation with no external load - a feature critical for CMOS RAM keep-alive circuits or standby power domains. This behavior is explicitly verified across −40°C to +125°C and confirmed in Section 9.2.2.4 of the datasheet.

Is the BYPASS pin on LP3995ITL-3.0/NOPB mandatory, and what capacitor value is recommended?

The BYPASS pin on LP3995ITL-3.0/NOPB is optional but strongly recommended: a 10 nF ceramic capacitor (NPO/COG) between BYPASS and GND reduces output noise by up to 50% and prevents startup overshoot. Omitting it increases output noise to ~50 µVRMS and risks transient instability during enable events.

Does LP3995ITL-3.0/NOPB require a specific ESR range for the output capacitor?

Yes, LP3995ITL-3.0/NOPB requires the output capacitor's ESR to be between 5 mΩ and 500 mΩ for guaranteed stability. A standard 1 µF X7R ceramic capacitor (ESR ≈20–40 mΩ) satisfies this; tantalum or electrolytic types must be carefully selected to meet the lower bound and avoid oscillation.

How does the thermal shutdown function behave on LP3995ITL-3.0/NOPB during sustained overload?

LP3995ITL-3.0/NOPB triggers thermal shutdown at ~160°C junction temperature and re-enables at ~140°C hysteresis. Under continuous overload, it enters thermal cycling - alternating between regulation and shutdown - which protects the die but degrades long-term reliability; proper PCB copper area and thermal vias are essential to avoid this mode.