Texas Instruments LP3853ES-5.0/NOPB

Overview

LP3853ES-5.0/NOPB from Texas Instruments is a 5.0V, 3A ultra-low-dropout linear regulator in TO-263-5 package, featuring 390mV dropout at full load, ±1.5% output voltage accuracy, and integrated error flag for output monitoring. It delivers stable power to microprocessor cores, DSPs, and GTL/SSTL bus terminators requiring fast transient response and ceramic capacitor compatibility.

For engineers reviewing the LP3853ES-5.0/NOPB datasheet, LP3853ES-5.0/NOPB pinout, LP3853ES-5.0/NOPB application, or LP3853ES-5.0/NOPB equivalent, key selection criteria include dropout voltage at 3A, ground pin current vs. load, shutdown quiescent current (10nA), error flag threshold hysteresis, and stability with 10µF ceramic output capacitors.

Technical Context

This CMOS-based LDO employs a PMOS pass element enabling ultra-low dropout operation down to 39mV at 300mA and 390mV at 3A while maintaining ±1.5% output accuracy over temperature. Its error flag circuit monitors VOUT with 10% undervoltage detection and 5% hysteresis, referenced directly to the regulated output.

The device supports remote sensing only in LP3856 variants; LP3853ES-5.0/NOPB uses the ERROR pin (Pin 5) instead of SENSE, confirming its fixed-output, fault-reporting configuration. Shutdown control is implemented via a CMOS-compatible SD pin with 1.3V threshold and <1nA input leakage.

Key Specifications

Pinout & Package

LP3853ES-5.0/NOPB is housed in a TO-263-5 (D²Pak) thermally enhanced surface-mount package with exposed thermal pad. The package supports high-power dissipation in compact layouts and requires minimum copper area per TI thermal derating guidelines (θ_jA = 60°C/W with 0.5in², 1oz copper).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSS721AIPW and TPS7A4701RGWR, LP3853ES-5.0/NOPB uniquely balances 3A output, 5.0V fixed regulation, ERROR flag integration, and TO-263 thermal performance - making it optimal for high-current, fault-aware embedded power rails where layout simplicity and reliability are prioritized.

Availability

LP3853ES-5.0/NOPB is available at Aetrix Electronics and suitable for microprocessor core supplies, GTL/SSTL bus terminators, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LP3853ES-5.0/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 leader specializing in analog, embedded processing, and high-reliability silicon solutions for industrial, automotive, and communications markets.

LP3853ES-5.0/NOPB belongs to TI's ultra-low-dropout linear regulator product line, engineered specifically for high-current, low-noise power delivery in space- and thermal-constrained embedded systems.

FAQ

What is the minimum input voltage required for LP3853ES-5.0/NOPB to regulate 5.0V at 3A?

The minimum input voltage is determined by dropout: LP3853ES-5.0/NOPB requires VIN ≥ VOUT + V_DROP. With 390mV typical dropout at 3A, LP3853ES-5.0/NOPB needs at least 5.39V input to sustain regulation. The absolute minimum VIN is also bounded by the 2.5V global spec, but 5.39V dominates for this 5.0V variant.

Can LP3853ES-5.0/NOPB use ceramic output capacitors, and what is the minimum value?

Yes - LP3853ES-5.0/NOPB is explicitly characterized for stability with ceramic output capacitors. The minimum stable value is 10µF, provided appropriate ceramic input capacitance is used (e.g., ≥10µF). For 3A loads, TI recommends matching input and output ceramic capacitance values to ensure stability across temperature and voltage.

How does the ERROR pin on LP3853ES-5.0/NOPB function, and what external components are needed?

The ERROR pin on LP3853ES-5.0/NOPB is an open-drain output that pulls low when VOUT falls >10% below 5.0V. It requires a 10kΩ–1MΩ pull-up resistor to VIN or logic supply. If unused, the pin must be tied to GND per TI's guidance - leaving it floating may cause undefined behavior or increased leakage.

Is LP3853ES-5.0/NOPB pin-compatible with LP3856 variants?

No - LP3853ES-5.0/NOPB and LP3856 share the same TO-263-5 package footprint but differ at Pin 5: LP3853ES-5.0/NOPB uses ERROR, while LP3856 uses SENSE. Swapping them without circuit modification will disable fault reporting or remote sensing. They are not drop-in replacements.

What thermal considerations apply to LP3853ES-5.0/NOPB in TO-263-5 package at full 3A load?

At 3A and 5.39V input (390mV dropout), power dissipation is ~1.17W. With θ_jA = 60°C/W (0.5in² copper), junction rise is ~70°C above ambient. To stay within −40°C to +125°C rating, ambient must remain ≤55°C. Use of thermal vias and larger copper pours is strongly recommended for sustained 3A operation.