STMicroelectronics STPTIC-27L1M6

Overview

STPTIC-27L1M6 from STMicroelectronics is a Parascan™ tunable integrated capacitor using barium strontium titanate (BST) dielectric, designed for RF antenna matching networks in mobile handsets. It delivers 2.7 pF nominal capacitance at 2 V bias, 3.5:1 tuning range (C_2V/C_20V), Q ≥ 65 at 900 MHz, +36 dBm peak RF power handling, and operates from DC to 3 GHz in µQFN-6L package.

For engineers reviewing the STPTIC-27L1M6 datasheet, STPTIC-27L1M6 pinout, STPTIC-27L1M6 application, or STPTIC-27L1M6 equivalent, key selection criteria include analog voltage-controlled tuning (2–20 V), low leakage current (<100 nA at 20 V), sub-135 µs transition time, and compatibility with ST's STHVDAC high-voltage control ICs in LTE/WCDMA multi-band antenna systems.

Technical Context

The STPTIC-27L1M6 implements a shunt/series-configurable BST-based varactor structure, enabling open-loop adaptive tuning without feedback circuitry. Its DC-biased RF path supports simultaneous high linearity (IP3 = 60–70 dBm) and low harmonic distortion (H2/H3 ≤ –45 dBm) across 700–3000 MHz bands.

It operates under recommended conditions of –30 °C to +85 °C ambient, 2–20 V analog control voltage, and ≤+35 dBm RF input power (50% duty cycle). The µQFN-6L package integrates DC blocking on the bias line and maintains RF port symmetry between RF1 and RF2 terminals.

Key Specifications

Pinout & Package

The STPTIC-27L1M6 is housed in a lead-free, ECOPACK®2-compliant µQFN-6L package measuring 1.2 × 1.6 × 0.9 mm with wettable flanks. Package features DC-blocking on the bias line and symmetrical RF ports optimized for 50 Ω shunt/series matching configurations.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar tunable capacitor applications.

Compared with AVX FMC1227 and Kyocera TCA2702, the STPTIC-27L1M6 provides superior RF linearity (+4–5 dB IP3), wider tuning ratio (3.5:1 vs. ≤3.3:1), and integrated DC blocking-enabling simpler, higher-performance antenna tuning in thermally demanding LTE/WCDMA platforms.

Availability

STPTIC-27L1M6 is available at Aetrix Electronics and suitable for cellular antenna matching, multi-band LTE front-end design, GSM/WCDMA diversity systems, and 5G NR sub-6 GHz beamforming requiring stable component supply across high-volume mobile production cycles.

Supply support for STPTIC-27L1M6 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 microcontrollers, power management ICs, sensors, and RF components for automotive, industrial, and consumer markets.

The STPTIC series belongs to ST's RF Tunable Passive portfolio, engineered specifically to replace fixed capacitor banks and mechanical tuners in mobile antenna systems-delivering adaptive impedance matching with zero moving parts and minimal power overhead.

FAQ

What is the maximum allowable DC bias voltage for continuous operation?

The absolute maximum DC bias voltage is 25 V, but the recommended operating range is 2–20 V. Operation above 20 V risks accelerated dielectric aging and reduced lifetime; sustained bias at 25 V is limited to transient conditions only, per Table 2 of the datasheet. Derating to ≤20 V ensures >1 million tuning cycles with <5% capacitance drift.

Can STPTIC-27L1M6 be used in series-tuned matching networks?

Yes-it supports both shunt and series configurations as confirmed in Table 4 measurement notes. In series mode, RF1 and RF2 serve as in-line signal path terminals while DC BIAS remains isolated via internal blocking capacitor; layout must maintain 50 Ω characteristic impedance and avoid stubs longer than λ/20 at 3 GHz to preserve Q and linearity.

Is the µQFN-6L package compatible with standard reflow profiles?

Yes-the device is qualified for ST's ECOPACK®2 reflow profile: peak temperature 240–245 °C, time above 220 °C = 60–90 s, and cooling gradient –2 to –3 °C/s. The µQFN's wettable flanks enable reliable solder joint inspection; airflow in reflow ovens must be minimized to prevent component displacement during liquidus phase.

How does leakage current affect open-loop tuning stability?

Leakage current <100 nA at 20 V ensures bias voltage remains stable over time without active regulation, critical for open-loop systems where no feedback corrects drift. At 85 °C, leakage rises to ~300 nA-still within acceptable range for 24-hour continuous operation, as verified in accelerated life testing per JEDEC JESD22-A108.