Texas Instruments LP3995ITL-1.8/NOPB

Overview

LP3995ITL-1.8/NOPB from Texas Instruments is a micropower 150-mA CMOS low-dropout (LDO) voltage regulator in a 5-pin DSBGA package, delivering a fixed 1.8 V output with ±75 mV accuracy, 60 mV dropout at 150 mA, and 25 µV_RMS output noise - optimized for powering RF and analog circuitry in space-constrained portable devices.

For engineers reviewing the LP3995ITL-1.8/NOPB datasheet, LP3995ITL-1.8/NOPB pinout, LP3995ITL-1.8/NOPB application, or LP3995ITL-1.8/NOPB equivalent, key selection criteria include fast enable/disable timing (30 µs turnon / 175 µs turnoff), active discharge on shutdown, stability with 1-µF ceramic output capacitor, and operation across −40°C to +125°C junction temperature.

Technical Context

The LP3995ITL-1.8/NOPB employs a CMOS pass transistor architecture enabling ultra-low quiescent current (85–150 µA under load, ≤3 nA in shutdown) and minimal dropout voltage. Its internal bandgap reference connects directly to the BYPASS pin, allowing external 10-nF capacitor integration to suppress noise without degrading transient response.

Enable control is logic-level compatible (VIH = 0.9 V, VIL = 0.4 V), with integrated active discharge circuitry pulling down the OUT node during disable to ensure rapid output collapse. Thermal shutdown activates at ~160°C with 20°C hysteresis, and short-circuit current limit is 450 mA.

Key Specifications

Pinout & Package

LP3995ITL-1.8/NOPB uses a 5-pin DSBGA (YZR) package measuring 1.502 mm × 1.045 mm, with bottom-side thermal pad connected to GND. Pin numbering follows top-view layout: IN (C3), GND (B2), EN (A1), BYPASS (A3), OUT (C1). No N/C pin present in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL720F18 and MCP1700T-1802E/TT, LP3995ITL-1.8/NOPB uniquely combines sub-3-nA shutdown current, active output discharge, and BYPASS-pin noise suppression in the smallest DSBGA footprint - making it optimal for RF-critical, space-constrained, battery-limited systems.

Availability

LP3995ITL-1.8/NOPB is available at Aetrix Electronics and suitable for GSM handsets, Bluetooth audio modules, and portable medical sensors requiring stable component supply, long-term manufacturability, and guaranteed parametric compliance across industrial temperature ranges.

Supply support for LP3995ITL-1.8/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, designing and manufacturing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.

LP3995ITL-1.8/NOPB belongs to TI's micropower linear regulator product line, engineered specifically for battery-powered portable electronics demanding ultra-low IQ, fast enable/disable, and minimal board area - with emphasis on RF and analog subsystem power integrity.

FAQ

What is the minimum input voltage required for LP3995ITL-1.8/NOPB to maintain regulation?

The LP3995ITL-1.8/NOPB requires a minimum input voltage of 2.5 V to operate within specification. With its 60 mV typical dropout at 150 mA, it maintains stable 1.8 V output down to VIN = 1.86 V - however, full electrical characteristics (including line/load regulation and PSRR) are only guaranteed above 2.5 V per the recommended operating conditions table in the datasheet.

Does LP3995ITL-1.8/NOPB require an external bypass capacitor, and what value is recommended?

Yes, LP3995ITL-1.8/NOPB requires a 10-nF ceramic capacitor between the BYPASS pin and GND. This capacitor connects directly to the internal bandgap reference node and is essential to reduce output noise by >50% and prevent output overshoot during startup - without affecting transient response speed or stability.

Can LP3995ITL-1.8/NOPB be used without a load, and does it remain stable?

Yes, LP3995ITL-1.8/NOPB remains stable and in regulation with no external load - a feature confirmed in Section 9.2.2.4 of the datasheet. This makes it suitable for applications like CMOS RAM keep-alive circuits or standby power domains where the output may be disconnected or lightly loaded for extended periods.

What is the thermal shutdown behavior of LP3995ITL-1.8/NOPB, and how does it recover?

LP3995ITL-1.8/NOPB activates thermal shutdown at approximately 160°C junction temperature and recovers automatically when the junction cools to ~140°C. The 20°C hysteresis prevents oscillation near the trip point. While protective, sustained thermal cycling indicates inadequate PCB heat sinking and may degrade long-term reliability.

Is LP3995ITL-1.8/NOPB compatible with ceramic output capacitors, and what ESR range is acceptable?

Yes, LP3995ITL-1.8/NOPB is explicitly designed for stability with 1-µF ceramic output capacitors. The datasheet specifies an ESR range of 5 mΩ to 500 mΩ - well within the typical 20–40 mΩ ESR of standard X7R/Z5U 1-µF ceramics - eliminating need for higher-ESR tantalum or aluminum electrolytic types.