Renesas UPD120N33T1B-E1-AZ

Overview

UPD120N33T1B-E1-AZ from Renesas Electronics is a three-terminal low-dropout positive-voltage regulator delivering 3.3 V at up to 0.3 A output current, featuring CMOS architecture for ultra-low quiescent current (60 μA typ.), on-chip overcurrent and thermal protection, and SC-62 surface-mount package. It serves as a stable local power supply in space-constrained consumer electronics such as digital TV and DVD players.

For engineers reviewing the UPD120N33T1B-E1-AZ datasheet, UPD120N33T1B-E1-AZ pinout, UPD120N33T1B-E1-AZ application, or UPD120N33T1B-E1-AZ equivalent, key selection criteria include dropout voltage (0.2 V typ. at 0.15 A), output noise (220 μVr.m.s.), ripple rejection (60 dB at 1 kHz), and thermal resistance (62.5°C/W on 16 cm² ceramic substrate).

Technical Context

The UPD120N33T1B-E1-AZ implements a CMOS-based error amplifier with internal reference voltage circuitry to regulate output voltage across input variations (4.5–5.5 V) and load conditions (0–0.3 A). Its protection architecture integrates independent overcurrent and thermal shutdown circuits that disable output when fault thresholds are exceeded.

Designed for low-noise, low-power applications, it requires external 0.1 μF input and 10 μF output capacitors placed within 2 cm of pins to ensure stability and transient response. The SC-62 package's dual GND terminals enhance thermal dissipation and reduce ground impedance in compact PCB layouts.

Key Specifications

Pinout & Package

UPD120N33T1B-E1-AZ uses the SC-62 plastic surface-mount package (4.0 × 2.5 × 1.5 mm), featuring three active terminals and two GND pads for improved thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD120N33T1B-E1-AZ, AP2303W-33Z trades thermal safety and output current for smaller size, while MCP1703T-3302E/MB improves regulation performance but shifts thermal management responsibility to the system designer.

Availability

UPD120N33T1B-E1-AZ is available at Aetrix Electronics and suitable for digital television, audio equipment, and optical disc drive applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.

Supply support for UPD120N33T1B-E1-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 manufacturer specializing in microcontrollers, analog, and power management solutions for industrial, automotive, and consumer markets.

The μPD120Nxx series was designed specifically for space-constrained, low-power consumer electronics requiring reliable, low-noise 3.3 V regulation with integrated protection - targeting digital TV, audio, HDD, and DVD platforms.

FAQ

What is the maximum input voltage rating for UPD120N33T1B-E1-AZ?

The absolute maximum input voltage for UPD120N33T1B-E1-AZ is +6 V. Operation above this level risks permanent damage. The recommended operating input range is 4.5 V to 5.5 V, ensuring optimal regulation accuracy, dropout performance, and thermal safety across the full −40°C to +85°C ambient temperature range. Exceeding the recommended range may degrade output voltage stability and accelerate parametric drift.

Does UPD120N33T1B-E1-AZ require external capacitors, and what values are specified?

Yes, UPD120N33T1B-E1-AZ requires both input and output capacitors for stable operation. A minimum 0.1 μF ceramic capacitor must be placed at the INPUT pin, sized according to PCB trace length to prevent parasitic oscillation. A minimum 10 μF ceramic capacitor with 1–8 Ω ESR is required at the OUTPUT pin to ensure load regulation and transient response. Both capacitors must be located within 2 cm of their respective pins per the datasheet layout guidance.

How does the thermal protection circuit in UPD120N33T1B-E1-AZ operate?

The thermal protection circuit in UPD120N33T1B-E1-AZ monitors junction temperature and disables the output when TJ exceeds +150°C. Recovery occurs automatically once the junction cools below +125°C hysteresis. This behavior is fully integrated - no external components are needed. The SC-62 package's dual GND terminals and low R_th(J-A) (62.5°C/W on 16 cm² ceramic) enable effective heat dissipation before shutdown triggers, supporting sustained 0.3 A operation in well-ventilated consumer enclosures.

Is UPD120N33T1B-E1-AZ compatible with lead-free reflow soldering processes?

Yes, UPD120N33T1B-E1-AZ is Pb-free and qualified for lead-free reflow soldering. It supports infrared reflow with a peak package surface temperature ≤260°C for ≤60 seconds at ≥220°C, up to three reflow cycles. The device also complies with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for SC-62 packages. Refer to Renesas document R03DS0030EJ0400 for full process details and recommended solder paste profiles.

What is the typical dropout voltage of UPD120N33T1B-E1-AZ at full load?

The typical dropout voltage of UPD120N33T1B-E1-AZ is 0.2 V at 0.15 A output current and 25°C junction temperature. At 0.3 A, the dropout increases to 0.6 V maximum per datasheet specifications. This low dropout enables efficient operation from a 5 V supply while maintaining 3.3 V regulation, making UPD120N33T1B-E1-AZ suitable for power-constrained consumer devices where input headroom is limited.