STMicroelectronics OCVPB21-13F6

Overview

OCVPB21-13F6 from STMicroelectronics is a highly integrated USB interface protection IC with 13 V input rectification bridge, ±15 kV IEC 61000-4-2 ESD protection on bridge inputs, adjustable 100–500 mA overcurrent protection, 5 V USB 2.0 data-line multiplexing (RON = 6 Ω typ), and open-drain FLAG output for fault reporting-designed for battery charging circuits in wearables and IoT devices where cable polarity inversion must be handled autonomously.

For engineers reviewing the OCVPB21-13F6 datasheet, OCVPB21-13F6 pinout, OCVPB21-13F6 application, or OCVPB21-13F6 equivalent, this device delivers verified USB cable orientation detection, bidirectional 13 V OVP (-0.3 V to +13.2 V), thermal shutdown at 148 °C, and WLCSP-13 package compatibility with 400 µm pitch-critical for space-constrained portable power management designs.

Technical Context

The OCVPB21-13F6 integrates a high-voltage rectification bridge that detects USB cable polarity via IN_A/IN_B inputs and reroutes USB_DP/USB_DM signals accordingly-enabling correct D+/D− mapping regardless of plug orientation. Its internal charge-pump-driven high-side/low-side MOSFET gate drivers support low-drop conduction (R_ON = 199 mΩ high-side, 119 mΩ low-side) while maintaining robust ESD immunity across all pins.

Overcurrent protection is externally set via RLIM (51–270 Ω), yielding precise ILIM from 108 mA to 586 mA; fast short-circuit response folds back current to ~75 mA, and thermal shutdown (T_sd = 148 °C, hysteresis = 28 °C) disables the switch until junction temperature drops by 30 °C-ensuring safe operation under sustained overload.

Key Specifications

Pinout & Package

OCVPB21-13F6 uses a 13-bump WLCSP package with 400 µm pitch, optimized for flip-chip mounting on high-density wearable PCBs. Bump layout follows standard A–E row / 1–3 column grid with non-solder-mask-defined microvias recommended.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB interface protection applications.

Compared with TPD2S017DRBR and MAX14541EATA+, OCVPB21-13F6 uniquely combines 13 V rectification, ±15 kV ESD, programmable OCP, and unified FLAG reporting in a sub-3 mm² package-making it the only solution qualified for unattended USB cable orientation in certified wearable designs.

Availability

OCVPB21-13F6 is available at Aetrix Electronics and suitable for wearable device charging interfaces, IoT sensor node power management, and compact medical electronics requiring stable component supply with full lifecycle traceability.

Supply support for OCVPB21-13F6 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, specializing in intelligent power, sensing, and control technologies for automotive, industrial, and consumer markets.

OCVPB21-13F6 belongs to ST's USB interface protection product line, engineered specifically to address polarity-agnostic charging, high-voltage transient resilience, and ultra-compact integration needs in next-generation wearables and edge IoT endpoints.

FAQ

What is the purpose of the RECTIF pin?

The RECTIF pin outputs the rectified voltage from the internal 13 V bridge, serving as the primary power source for the internal LDO regulator and OVP circuitry. It ensures stable biasing regardless of USB cable orientation and provides the reference for polarity detection logic-enabling automatic rerouting of USB data lines without external control signals.

How does the RLIM resistor affect overcurrent protection accuracy?

RLIM sets the OCP threshold using the formula ILIM = (318 − RLIM)/0.447 (mA). A 1% tolerance resistor yields ±15% current limit accuracy due to process variation in the internal current-sense amplifier. For tight regulation, ST recommends placing RLIM within 2 mm of the E1 pin with Z < 500 mΩ trace impedance to minimize noise-induced trip errors.

Can OCVPB21-13F6 support USB 2.0 high-speed data without signal degradation?

Yes-its 9 pF ON capacitance, 420 MHz -3 dB bandwidth, and 9.2 Ω R_ON meet USB-IF high-speed (480 Mbps) eye diagram specifications. The internal MUX preserves differential impedance matching, and layout guidelines specify 90 Ω differential routing for USB_INC/USB_IND/USB_DP/USB_DM traces to maintain signal integrity.

What happens during thermal shutdown and how is recovery managed?

When junction temperature reaches 148 °C, the power switch opens and FLAG goes low. Recovery begins only after temperature drops by 28 °C (hysteresis), re-enabling the output. This prevents thermal cycling; the 605 µm WLCSP package's thermal resistance (θ_JA ≈ 180 °C/W) ensures safe cooldown within seconds under typical wearable PCB copper pour conditions.