Renesas UPC2925BT1D-E1-AT

Overview

UPC2925BT1D-E1-AT from Renesas Electronics is a three-terminal low dropout (LDO) voltage regulator delivering 2.5 V at up to 1.0 A output current, featuring ±2% output voltage tolerance at 25°C, 0.6 V maximum dropout at 0.5 A, and integrated thermal shutdown, overcurrent limiting, and inrush current protection. It powers core logic rails in LCD monitors, digital TV mainboards, and audio subsystems where stable low-voltage supply under variable load is critical.

For engineers reviewing the UPC2925BT1D-E1-AT datasheet, UPC2925BT1D-E1-AT pinout, UPC2925BT1D-E1-AT application, or UPC2925BT1D-E1-AT equivalent, key selection criteria include dropout voltage at full load, quiescent current under no-load (1.8 mA typ.), short-circuit current (0.6 A typ.), ripple rejection (60 dB at 120 Hz), and TO-252 (MP-3ZK) thermal performance with R_th(J-C) = 12.5°C/W.

Technical Context

The UPC2925BT1D-E1-AT implements a bipolar-based LDO architecture with internal reference voltage, error amplifier, drive transistor, and protection circuitry including saturation detection and thermal foldback. Its dropout behavior is characterized by V_DIF ≤ 0.6 V at I_O = 0.5 A and ≤ 0.7 V (design max) at I_O = 1 A across −40°C to +125°C junction temperature.

It requires external input (≥0.1 μF ceramic) and output (≥10 μF low-ESR electrolytic) capacitors for stability and transient response. The device operates within 3.5 V to 12.0 V input range and maintains regulation down to 2.5 V output with <30 mV load regulation (0–1 A) and <25 mV line regulation (3.5–12 V).

Key Specifications

Pinout & Package

UPC2925BT1D-E1-AT uses the TO-252 (MP-3ZK) surface-mount package: a 4-pin variant with Pin 1 (INPUT), Pin 2 (GND), Pin 3 (OUTPUT), and Pin 4 (GND Fin). Pins 2 and 4 are internally common GND connections; Pin 4 serves as an exposed thermal pad for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and MCP1703T-2502E/MB, UPC2925BT1D-E1-AT uniquely balances 1 A output, 0.6 V dropout, and 62 μV noise in a thermally optimized TO-252 package - making it optimal for space-constrained, medium-power consumer electronics where input headroom is limited and moderate noise performance suffices.

Availability

UPC2925BT1D-E1-AT is available at Aetrix Electronics and suitable for LCD monitors, digital TV mainboards, and audio system DSP cores requiring stable component supply with RoHS-compliant packaging and industrial temperature support.

Supply support for UPC2925BT1D-E1-AT 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 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power management ICs.

The μPC29xxB series was designed for cost-sensitive, high-volume consumer electronics requiring robust, low-dropout linear regulation - targeting applications like digital TV, DVD players, and LCD displays where reliability and thermal efficiency are essential.

FAQ

What is the maximum input voltage rating for UPC2925BT1D-E1-AT?

The absolute maximum input voltage for UPC2925BT1D-E1-AT is +16.0 V. However, the recommended operating input voltage range is 3.5 V to 12.0 V. Exceeding 12.0 V may increase power dissipation beyond safe limits, especially at full 1.0 A load, and risks exceeding the 150°C junction temperature shutdown threshold. Always verify thermal design margins when operating near upper limits.

Does UPC2925BT1D-E1-AT require external capacitors, and what values are specified?

Yes, UPC2925BT1D-E1-AT requires both input and output capacitors. A minimum 0.1 μF ceramic capacitor must be placed at the INPUT pin to prevent parasitic oscillation, and a minimum 10 μF low-ESR electrolytic capacitor is required at the OUTPUT pin to ensure stability and improve load regulation. Both capacitors must be located within 1–2 cm of their respective pins per the datasheet layout guidance.

What thermal performance can be expected from UPC2925BT1D-E1-AT in a standard PCB layout?

With the TO-252 (MP-3ZK) package, UPC2925BT1D-E1-AT achieves R_th(J-C) = 12.5°C/W and R_th(J-A) = 125°C/W when mounted on a standard FR-4 board with a 2 cm² copper pour connected to Pin 4 (GND Fin). Under 1.0 A load at 25°C ambient, junction temperature rise is approximately 125°C - confirming the need for adequate heatsinking or derating above 85°C ambient.

Is UPC2925BT1D-E1-AT compatible with lead-free reflow processes?

Yes, UPC2925BT1D-E1-AT carries the -AT suffix indicating full Pb-free compliance: no lead in external electrodes or internal materials. It is qualified for infrared reflow with peak package surface temperature ≤260°C for ≤60 seconds at ≥220°C, and supports up to three reflow cycles per JEDEC J-STD-020 standards.

How does the short-circuit protection behave in UPC2925BT1D-E1-AT?

UPC2925BT1D-E1-AT features an on-chip overcurrent limiter that delivers a typical short-circuit current of 0.6 A when the OUTPUT pin is shorted to GND. This current limit is non-latching and remains active as long as the fault persists, allowing safe thermal management without device destruction. Recovery is automatic once the short is removed and junction temperature falls below the thermal shutdown hysteresis threshold.