Texas Instruments LP3852EMP-5.0/NOPB

Overview

LP3852EMP-5.0/NOPB from Texas Instruments is a fixed-output 5.0 V, 1.5 A ultra-low dropout linear regulator in SOT-223 package with ERROR flag output, 240 mV dropout at full load, ±1.5% output voltage accuracy at 25°C, and 10 nA shutdown quiescent current. It delivers stable power to microprocessor core rails and GTL bus terminators requiring fast transient response and tight regulation.

For engineers reviewing the LP3852EMP-5.0/NOPB datasheet, LP3852EMP-5.0/NOPB pinout, LP3852EMP-5.0/NOPB application, or LP3852EMP-5.0/NOPB equivalent, key selection considerations include its 5.0 V fixed output, ERROR pin status monitoring, SOT-223 thermal performance (R_θJA = 65.2°C/W), and compatibility with ceramic or tantalum output capacitors ≥10 µF.

Technical Context

The LP3852EMP-5.0/NOPB uses a CMOS-based PMOS pass transistor architecture enabling load-independent quiescent current (4 mA typical at 1.5 A) and ultra-low dropout-24 mV at 150 mA and 240 mV at 1.5 A. Its ERROR pin provides open-drain fault signaling when V_OUT falls >10% below nominal, with built-in hysteresis (5–16% of V_OUT) and 1 µs reset delay.

It operates across −40°C to +125°C junction temperature, supports input voltages from 2.5 V to 7 V, and features overtemperature/overcurrent protection. Unlike the LP3855 variant, it lacks a SENSE pin and regulates at the OUT pin-not remote loads-making it suitable for local point-of-load regulation where trace resistance is negligible.

Key Specifications

Pinout & Package

SOT-223 (NDC) package: 6.50 mm × 3.56 mm body, thermally enhanced with exposed pad (not electrically connected); pin 1 = SD, pin 2 = IN, pin 3 = OUT, pin 4 = ERROR, pin 5 = GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSS721AIPW and TPS7A4701RGWR, the LP3852EMP-5.0/NOPB uniquely combines 5.0 V/1.5 A capability, ERROR flag, SOT-223 thermal efficiency, and 240 mV dropout-making it optimal for cost-sensitive, space-constrained digital power applications requiring fault visibility.

Availability

LP3852EMP-5.0/NOPB is available at Aetrix Electronics and suitable for microprocessor core supplies, GTL bus terminators, SCSI termination circuits, and battery-powered instrumentation requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for LP3852EMP-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 company specializing in analog and embedded processing technologies, with leadership in power management ICs since the 1980s.

The LP3852EMP-5.0/NOPB belongs to TI's LP385x ultra-low dropout linear regulator family, designed specifically for high-current, low-voltage digital systems demanding fast transient response, minimal dropout, and integrated fault monitoring.

FAQ

What is the minimum input voltage required for LP3852EMP-5.0/NOPB to regulate 5.0 V output?

The LP3852EMP-5.0/NOPB requires a minimum input voltage of 5.24 V to maintain regulation at 1.5 A load, based on its 240 mV dropout specification. At lighter loads (e.g., 150 mA), the dropout drops to 24 mV, allowing operation from as low as 5.024 V. Input must remain ≥2.5 V regardless of load per absolute maximum ratings.

How should the ERROR pin of LP3852EMP-5.0/NOPB be interfaced in a system?

The ERROR pin of LP3852EMP-5.0/NOPB is an open-drain output that sinks current when V_OUT falls >10% below 5.0 V. It must be pulled high with a 10 kΩ–1 MΩ resistor to a logic-compatible voltage (e.g., 3.3 V or 5 V). If unused, connect ERROR directly to GND. Do not leave floating-this may cause undefined behavior or increased quiescent current.

Can LP3852EMP-5.0/NOPB operate with only ceramic capacitors?

Yes, LP3852EMP-5.0/NOPB is stable with ceramic output capacitors ≥10 µF and ESR < 10 mΩ. For 1.5 A loads, up to 150 µF ceramic C_OUT is supported when paired with ≥10 µF ceramic C_IN. Avoid Z5U/Y5V dielectrics due to severe voltage coefficient; X5R/X7R ceramics are recommended for stable capacitance across temperature and bias.

Does LP3852EMP-5.0/NOPB have reverse current protection?

No, LP3852EMP-5.0/NOPB does not include active reverse current protection. Its internal PMOS pass device contains a parasitic body diode that conducts from OUT to IN if V_OUT exceeds V_IN. This diode tolerates up to 200 mA continuous or 1 A peak current-external Schottky diodes are required for robust reverse-blocking in back-to-back regulator or hot-swap configurations.

What thermal derating applies to LP3852EMP-5.0/NOPB in SOT-223 package?

In the SOT-223 (NDC) package, LP3852EMP-5.0/NOPB has R_θJA = 65.2°C/W (with 0.5 in² 1-oz copper). At 1.5 A load with 5.24 V input (240 mV dropout), power dissipation is 360 mW. Junction temperature rise is ~23.5°C above ambient-well within the −40°C to +125°C range. No heatsink is needed below 85°C ambient; above that, reduce load current per thermal derating curves in the datasheet.