STMicroelectronics LCP02-150B1RL

Overview

LCP02-150B1RL from STMicroelectronics is a dual-thyristor crowbar protection IC designed for SLIC (Subscriber Line Interface Circuit) applications in telecom line cards. It provides programmable overvoltage protection on TIP and RING lines with independent negative (Gn) and positive (Gp) gate control, -110V to +95V firing range, 30A peak pulse current (10/1000µs), and UL497B approval (E136224) for ringing circuit protection.

For engineers reviewing the LCP02-150B1RL datasheet, LCP02-150B1RL pinout, LCP02-150B1RL application in SLIC protection, or LCP02-150B1RL equivalent for telecom surge suppression, this page delivers verified functional specifications, SO-8 Wide package details, gate-triggering behavior, thermal derating curves, and compliance mapping to ITU-T K20/K21, Bellcore GR-1089-CORE, FCC Part 68, and IEC61000-4-5 Level 4.

Technical Context

The LCP02-150B1RL implements two independent thyristor-based crowbar structures - one for negative surges (triggered via Gn at -110V to 0V), one for positive surges (triggered via Gp at 0V to +95V). Each path uses transistor-assisted gate triggering to reduce battery current during clamping.

It supports dual-battery SLIC topologies (±V_bat) and high-negative-voltage SLICs (-110V only), with dynamic switching voltage V_DGL- ≤18V (negative) and V_DGL+ ≤35V (positive) under 10/1000µs 30A surge, and maintains operation across -20°C to +85°C with junction-to-ambient thermal resistance of 150°C/W.

Key Specifications

Pinout & Package

Package: SO-8 Wide (8-pin plastic surface-mount), 6.05 mm × 5.02 mm body, 1.27 mm pitch, 2.00 mm max height, UL94-V0 rated resin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SLIC crowbar protection applications.

Compared with P0220SC and NUP4105, the LCP02-150B1RL uniquely delivers bidirectional, programmable, latching crowbar protection with certified UL497B compliance-enabling single-chip SLIC protection across global telecom standards without external biasing complexity or parallel device coordination.

Availability

LCP02-150B1RL is available at Aetrix Electronics and suitable for Central Office line cards, ADSL G.Lite DSLAMs, Fiber-in-the-Loop remote terminals, and Wireless Local Loop base stations requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for LCP02-150B1RL 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, microcontroller, and automotive ICs with vertical fabrication capability and ISO/TS 16949-certified operations.

The LCP02 series belongs to ST's Telecom Protection IC product line, engineered specifically for high-reliability, standards-compliant overvoltage protection in voice/data line interface circuits-including SLICs, CODECs, and hybrid couplers-where crowbar action, programmability, and regulatory certification are mandatory.

FAQ

What is the minimum recommended series resistor (Rs) between LCP02-150B1RL and SLIC to ensure safe operation under Bellcore GR-1089-CORE Second Level (5kV, 2/10µs)?

The LCP02-150B1RL itself does not specify a minimum Rs, but system-level testing per Bellcore requires limiting surge current to ≤500A. With a 5kV open-circuit surge and generator source impedance (Rg) of 2Ω, Rs ≥ 8Ω is required to keep I_surge ≤ 500A. Typical designs use 10–22Ω PTCs or fusible resistors placed adjacent to the IC to meet this requirement while surviving power contact tests.

Can LCP02-150B1RL be used in a single-supply (+48V only) SLIC configuration?

Yes-configure Gp to +48V and leave Gn open or tie to GND (per ST AN2127 guidance). The positive thyristor fires at ~+55V, providing robust protection. However, the negative path remains inactive, so external protection (e.g., TVS diode) is needed if negative transients exceed -5V. Full dual-supply advantage is lost, but functionality remains valid for +V_bat-only systems.

How does the 220nF capacitor (Cn/Cp) on Gn and Gp affect response time and clamping voltage?

The 220nF capacitors accelerate gate charging during fast-rising surges (e.g., 1.2/50µs), reducing dynamic breakover voltage at TIP/RING by up to 40% versus DC-triggered operation. They must be placed within 3mm of Gn/Gp pins and referenced directly to GND to minimize inductance. Values outside 100–470nF degrade timing margin or increase ringing.

Is LCP02-150B1RL compliant with RoHS and REACH regulations?

Yes-LCP02-150B1RL is manufactured in STMicroelectronics' RoHS-compliant facilities and meets EU Directive 2011/65/EU (RoHS 2) and Regulation (EC) No. 1907/2006 (REACH) with full substance declarations available in ST's official Product Change Notification (PCN) #18-0124 and material declaration report D180124.