Renesas UPC2926HB-AZ

Overview

UPC2926HB-AZ from Renesas Electronics is a three-terminal low dropout linear voltage regulator delivering a fixed 2.6 V output at up to 1 A, using a PNP output stage to achieve 0.7 V typical dropout at full load, with ±2% output voltage accuracy and integrated thermal shutdown, over-current limiting, and safe operating area protection - deployed in industrial power rails for microcontroller core supplies and sensor interface circuits.

For engineers reviewing the UPC2926HB-AZ datasheet, UPC2926HB-AZ pinout, UPC2926HB-AZ application, or UPC2926HB-AZ equivalent, this page delivers verified package mapping (SC-64/MP-3), confirmed electrical parameters (VDIF = 0.7 V TYP., VO = 2.6 V, IO = 1 A, Rth(J-C) = 12.5°C/W), thermal derating curves, and real-world design constraints including input voltage minimums (3.6 V), capacitor requirements (CIN ≥ 0.1 µF, COUT ≥ 10 µF), and saturation behavior below VIN threshold.

Technical Context

This regulator employs a PNP pass transistor architecture enabling low dropout operation without requiring a PMOS or NPN-based LDO topology. Its internal block includes an error amplifier, reference voltage source, startup circuit, and independent protection blocks for thermal shutdown, over-current, saturation, and safe operating area - all implemented in bipolar analog process technology.

It operates within −30°C to +85°C ambient temperature, supports junction temperatures up to +125°C under continuous operation (with thermal shutdown at +150°C), and requires external input/output capacitors for stability - with CIN placement critical to prevent parasitic oscillation and COUT selection dependent on low-impedance performance at sub-zero temperatures.

Key Specifications

Pinout & Package

UPC2926HB-AZ uses the SC-64 (MP-3) surface-mount package: 4-pin, GND-isolated layout with exposed fin (Pin 4) thermally and electrically tied to Pin 2 (GND). Package dimensions: 6.5 × 5.0 × 2.3 mm (L × W × H), with 1.6 mm lead pitch and 0.75 mm lead thickness.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout voltage regulator applications.

Compared with TLV70226DBVR and TPS7A1626DRBR, UPC2926HB-AZ uniquely balances 1 A output, 0.7 V dropout, and bipolar-process robustness - making it the only viable option among the three for cost-sensitive, thermally constrained 1 A designs where input voltage is tightly bounded between 3.6 V and 16 V.

Availability

UPC2926HB-AZ is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for UPC2926HB-AZ 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

Renesas Electronics Corporation is a global semiconductor leader formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog power devices, and trusted embedded solutions.

UPC2926HB-AZ belongs to the µPC29xx family of bipolar LDO regulators designed specifically for cost-effective, thermally resilient local power conversion in industrial and consumer equipment - emphasizing reliability over feature density.

FAQ

What is the minimum input voltage required for stable regulation with UPC2926HB-AZ?

The UPC2926HB-AZ requires a minimum input voltage of 3.6 V to maintain 2.6 V output regulation at full 1 A load, as specified in the Recommended Operating Conditions table. Below this threshold, the PNP output stage saturates, increasing quiescent current to up to 80 mA and risking thermal overload - so upstream supply must be rated for both steady-state and transient startup current demands.

Does UPC2926HB-AZ require external capacitors, and what are the critical values?

Yes, UPC2926HB-AZ requires two external capacitors: CIN ≥ 0.1 µF (film or laminated ceramic) placed within 1–2 cm of the INPUT pin to prevent parasitic oscillation, and COUT ≥ 10 µF (low-impedance electrolytic) placed adjacent to the OUTPUT pin to ensure stability and improve load regulation. Using undersized or poorly located capacitors risks oscillation, especially under dynamic load conditions.

How does the thermal performance of UPC2926HB-AZ compare between SC-64 and TO-220 packages?

UPC2926HB-AZ in SC-64 (MP-3) has Rth(J-C) = 12.5°C/W, versus 7°C/W for the HF variant in isolated TO-220 (MP-45G). This means the SC-64 version dissipates more heat at the junction for the same power - requiring larger PCB copper area (≥2 cm² thermal pad) and ≥4 thermal vias to sustain 1 A continuous output at 85°C ambient, whereas the TO-220 variant can use a small external heatsink.

Is UPC2926HB-AZ pin-compatible with other members of the µPC29xx family?

Yes, UPC2926HB-AZ shares identical pinout (INPUT-GND-OUTPUT-GND fin) and SC-64 package footprint with UPC2918HB-AZ and UPC2925HB-AZ - allowing drop-in replacement across the 1.8 V, 2.5 V, and 2.6 V variants without PCB redesign, provided the application tolerates the specific output voltage and associated load regulation behavior.

What protection features are built into UPC2926HB-AZ, and how do they activate?

UPC2926HB-AZ integrates four protection mechanisms: (1) thermal shutdown triggers at TJ > 150°C, disabling output until junction cools; (2) over-current limiting activates at ~1.2 A short-circuit current; (3) saturation protection engages when VIN drops near VO, limiting base drive; and (4) safe operating area (SOA) circuitry prevents destructive second breakdown in the PNP pass transistor - all operating autonomously without external components.