Renesas UPC2925BHB-AY

Overview

UPC2925BHB-AY from Renesas Electronics is a three-terminal low dropout (LDO) linear voltage regulator delivering 2.5 V at up to 1.0 A output current. It features ±2% output voltage tolerance at 25°C, 0.6 V maximum dropout at 0.5 A, and integrated over-current and thermal shutdown protection. It is used in power rails for digital TV, LCD monitors, and audio systems where stable low-voltage biasing is required.

For engineers reviewing the UPC2925BHB-AY datasheet, UPC2925BHB-AY pinout, UPC2925BHB-AY application, or UPC2925BHB-AY equivalent, key selection criteria include dropout voltage under load, quiescent current at zero load (1.8 mA typ.), short-circuit current limit (0.6 A typ.), thermal resistance (12.5°C/W junction-to-case), and Pb-free SC-64 (MP-3) package compatibility with wave-soldering processes.

Technical Context

The UPC2925BHB-AY implements a bipolar analog LDO architecture with an internal reference voltage, error amplifier, drive transistor, and protection circuitry including on-chip inrush current limiting during input voltage rise. Its design targets low-noise, high-accuracy regulation for sensitive analog and mixed-signal loads.

It operates across −40°C to +85°C ambient temperature, supports input voltages from 3.5 V to 12.0 V, and maintains regulation down to 0.36 V dropout at 0.5 A load. The device uses external input (≥0.1 µF) and output (≥10 µF) capacitors for stability and transient response, with recommended placement within 1–2 cm of the IC pins.

Key Specifications

Pinout & Package

UPC2925BHB-AY is housed in the SC-64 (MP-3) surface-mount package - a 4-pin, isolated, gull-wing lead frame with Pin 4 serving as an exposed GND fin for enhanced thermal conduction. The package measures 6.5 mm × 5.0 mm × 1.6 mm and is Pb-free with Sn100% plating (AY suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPC2925BHB-AY, TPS7A4700RGWR offers superior noise and PSRR but demands careful loop compensation, while MCP1703T-2502E/MB sacrifices output current and protection for ultra-low IQ and footprint - neither is pin-compatible, and both require PCB redesign.

Availability

UPC2925BHB-AY is available at Aetrix Electronics and suitable for digital TV, LCD monitor, and audio system designs requiring stable component supply, RoHS-compliant packaging, and industrial-grade thermal reliability.

Supply support for UPC2925BHB-AY 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, and power management solutions.

The UPC29xxB series was developed by Renesas as a family of robust, low-dropout linear regulators targeting cost-sensitive consumer electronics with strict thermal and accuracy requirements - particularly digital AV equipment and office peripherals.

FAQ

What is the maximum input voltage rating for UPC2925BHB-AY?

The absolute maximum input voltage for UPC2925BHB-AY is +16.0 V. However, the recommended operating range is 3.5 V to 12.0 V. Exceeding 12.0 V may increase power dissipation beyond safe limits, especially at full 1 A load, risking thermal shutdown or long-term reliability degradation. Always verify worst-case VIN in your system, including ripple and overshoot.

Does UPC2925BHB-AY require external capacitors, and what values are mandatory?

Yes, UPC2925BHB-AY requires both input and output capacitors for stability. A minimum 0.1 µF ceramic capacitor must be placed directly at the INPUT pin to prevent parasitic oscillation, and a minimum 10 µF low-impedance electrolytic capacitor is required at the OUTPUT pin to ensure load regulation and transient response. Both must be located within 1–2 cm of their respective pins per the datasheet layout guidance.

How does the thermal shutdown feature operate in UPC2925BHB-AY?

UPC2925BHB-AY incorporates an on-chip thermal shutdown circuit that disables the output when the junction temperature reaches approximately 150°C. Once tripped, the device remains off until TJ falls below ~135°C (typical hysteresis), then automatically resumes regulation. This protects against permanent damage during sustained overload, inadequate heatsinking, or high ambient temperature conditions.

Is UPC2925BHB-AY pin-compatible with other variants in the μPC29xxB series?

Yes - all μPC29xxB variants (e.g., UPC2918BHB-AY, UPC2933BHB-AY, UPC2905BHB-AY) share identical SC-64 (MP-3) pinout and mechanical footprint. Only the output voltage differs (1.8 V, 2.5 V, 3.3 V, 5.0 V). This allows board-level voltage scalability without layout changes, provided input voltage and load requirements remain within each variant's specified operating conditions.

What does the "-AY" suffix indicate in UPC2925BHB-AY?

The "-AY" suffix denotes a Pb-free version of UPC2925BHB with 100% tin (Sn100%) plating on external electrodes. It complies with EU RoHS Directive requirements and is qualified for standard wave-soldering processes (peak ≤260°C, flow time ≤10 s). This distinguishes it from non-Pb-free (-HB) and other Pb-free variants like -AZ (Pb-free, unspecified plating).