Renesas UPD120N33TA-E1-AT

Overview

UPD120N33TA-E1-AT from Renesas Electronics is a three-terminal, low-dropout positive-voltage regulator delivering 3.3 V at up to 0.3 A output current, fabricated in CMOS technology for ultra-low quiescent current (60 μA typ.). It features on-chip overcurrent and thermal protection, and is housed in the SC-74A package for space-constrained digital TV and audio power rails.

For engineers reviewing the UPD120N33TA-E1-AT datasheet, UPD120N33TA-E1-AT pinout, UPD120N33TA-E1-AT application, or UPD120N33TA-E1-AT equivalent, this device is selected for stable 3.3 V supply in noise-sensitive consumer electronics where low standby power, small footprint, and dropout voltage under 0.6 V at 150 mA are critical design requirements.

Technical Context

The UPD120N33TA-E1-AT uses a CMOS-based error amplifier and reference voltage circuit to regulate output with high accuracy (±1% over load/line/temperature). Its internal protection circuits autonomously disable output during overcurrent or junction temperature exceeding 150°C, enabling robust operation without external supervision.

Designed for minimal external components, it requires only a 0.1 μF input capacitor and a 10 μF output capacitor with ESR of 1–8 Ω. Dropout voltage is specified at 0.2 V (typ.) at 150 mA, supporting operation from as low as 4.5 V input while maintaining regulated 3.3 V output.

Key Specifications

Pinout & Package

UPD120N33TA-E1-AT is supplied in the SC-74A surface-mount package (5-pin plastic mini-mold), measuring 2.9 mm × 1.5 mm × 0.95 mm (max height), with lead pitch of 0.95 mm and Pb-free terminations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP2112K-3.3TRG1 and MCP1700T-3302E/TT, UPD120N33TA-E1-AT uniquely balances 0.3 A capability, 60 μA quiescent current, integrated thermal/overcurrent protection, and SC-74A size-making it optimal for mid-power consumer electronics where reliability and board area are jointly constrained.

Availability

UPD120N33TA-E1-AT is available at Aetrix Electronics and suitable for digital television, audio systems, and optical disc drive applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for UPD120N33TA-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 is a global semiconductor leader specializing in microcontrollers, analog, and power management ICs, with deep expertise in automotive, industrial, and consumer electronics solutions.

The μPD120Nxx series was designed specifically for space- and power-constrained consumer electronics, delivering high-accuracy, low-noise, low-quiescent-current regulation in miniature packages for digital TV, audio, and optical storage subsystems.

FAQ

What is the minimum input voltage required for UPD120N33TA-E1-AT to maintain regulation?

The UPD120N33TA-E1-AT requires a minimum input voltage of 4.5 V to guarantee 3.3 V output across its full 0–0.3 A load range and −40°C to +85°C ambient temperature. At 150 mA load, the dropout voltage is as low as 0.2 V (typ.), meaning regulation is maintained down to ~3.5 V input-but 4.5 V is the rated minimum per recommended operating conditions.

Does UPD120N33TA-E1-AT include an enable pin or shutdown function?

No, UPD120N33TA-E1-AT does not include an enable (EN) or shutdown pin. It operates continuously when valid input voltage is applied. The device relies solely on its internal overcurrent and thermal protection circuits for fault response; external ON/OFF control requires interrupting the input supply or using a series MOSFET.

What capacitor values and types are mandatory for stable operation of UPD120N33TA-E1-AT?

UPD120N33TA-E1-AT requires a minimum 0.1 μF ceramic input capacitor (CIN) placed within 2 cm of the INPUT pin, and a minimum 10 μF output capacitor (COUT) with 1–8 Ω equivalent series resistance. Laminated ceramic capacitors are acceptable for CIN if rated ≥0.1 μF across operating voltage and temperature; aluminum polymer or tantalum may be used for COUT if ESR falls within spec.

Is UPD120N33TA-E1-AT compatible with lead-free reflow soldering processes?

Yes, UPD120N33TA-E1-AT is Pb-free compliant and qualified for infrared reflow soldering with peak package surface temperature ≤260°C for ≤60 seconds at ≥220°C. It adheres to JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for SC-74A packaging and supports up to three reflow cycles.

How does the thermal protection in UPD120N33TA-E1-AT behave during overload?

When junction temperature exceeds 150°C, UPD120N33TA-E1-AT's internal thermal protection circuit disables the output until the die cools below the hysteresis threshold (~135°C). This auto-recovery behavior prevents permanent damage during transient overloads such as HDD spin-up or DVD laser activation, without requiring external reset circuitry.