Renesas UPD120N15T1B-E1-AZ

Overview

UPD120N15T1B-E1-AZ from Renesas Electronics is a three-terminal, low-dropout positive-voltage regulator delivering 1.5 V at up to 0.3 A output current in SC-62 package. It features CMOS architecture for ultra-low quiescent current (60 μA typ.), on-chip overcurrent and thermal protection, and operates across –40°C to +85°C ambient. It serves as a primary power supply for low-voltage logic rails in digital TV and audio subsystems.

For engineers reviewing the UPD120N15T1B-E1-AZ datasheet, UPD120N15T1B-E1-AZ pinout, UPD120N15T1B-E1-AZ application, or UPD120N15T1B-E1-AZ equivalent, key selection criteria include dropout voltage (1.0 V max at 0.3 A), output noise (100 μVr.m.s.), ripple rejection (63 dB at 1 kHz), and Pb-free SC-62 packaging with 1000 pcs/reel taping.

Technical Context

This regulator uses a CMOS-based error amplifier and reference voltage circuit to maintain stable 1.5 V output under varying load (0–0.3 A) and input conditions (3.0–5.5 V). Its internal protection includes foldback overcurrent limiting and thermal shutdown triggered above +150°C junction temperature.

The device requires external input (≥0.1 μF) and output (≥10 μF) capacitors placed within 2 cm of pins to ensure stability and transient response. Schottky diodes are recommended for reverse-voltage protection when OUTPUT exceeds INPUT or falls below GND.

Key Specifications

Pinout & Package

UPD120N15T1B-E1-AZ is housed in SC-62 surface-mount package (4.0 mm × 2.5 mm × 1.5 mm), optimized for high-density PCB layouts in space-constrained consumer electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD120N15T1B-E1-AZ, AP2112K-1.5TRG1 offers lower dropout and quiescent current but requires redesign for SOT-23-5 layout and lacks dual-GND noise suppression; TPS73115DBVR provides superior PSRR but cannot support full 0.3 A loads, making it unsuitable for high-current digital TV or HDD applications.

Availability

UPD120N15T1B-E1-AZ is available at Aetrix Electronics and suitable for digital TV, audio subsystems, and optical drive designs requiring stable component supply, RoHS compliance, and long-lifecycle availability.

Supply support for UPD120N15T1B-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 is a global semiconductor leader 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-delivering precise, low-noise 1.5 V to 3.3 V regulation with minimal external components and robust thermal protection.

FAQ

What is the maximum input voltage for UPD120N15T1B-E1-AZ?

The absolute maximum input voltage for UPD120N15T1B-E1-AZ is +6.0 V. Operation beyond this limit-even momentarily-may cause irreversible damage. For reliable performance, the recommended operating input range is 3.0 V to 5.5 V, ensuring sufficient headroom above the 1.5 V output while maintaining low dropout behavior. This range aligns with common intermediate rails derived from 5 V USB or buck converters.

Does UPD120N15T1B-E1-AZ require external capacitors, and what values are specified?

Yes, UPD120N15T1B-E1-AZ requires two external capacitors: a minimum 0.1 μF ceramic capacitor (CIN) placed between INPUT and GND, and a minimum 10 μF low-ESR capacitor (COUT) between OUTPUT and GND. Both must be located within 2 cm of their respective pins. CIN prevents parasitic oscillation; COUT ensures stability and improves load regulation. Using laminated ceramics for CIN is acceptable if capacitance remains ≥0.1 μF across operating voltage and temperature.

How does the thermal protection in UPD120N15T1B-E1-AZ operate?

UPD120N15T1B-E1-AZ incorporates an on-chip thermal protection circuit that disables the output when junction temperature exceeds +150°C. Once the die cools below the hysteresis threshold (~135°C), regulation resumes automatically. This feature prevents permanent damage during sustained overload or poor PCB thermal design. The SC-62 package's thermal resistance is 62.5°C/W when mounted on a 16 cm² ceramic substrate, enabling safe 0.3 A operation at +85°C ambient with adequate copper area.

Is UPD120N15T1B-E1-AZ pin-compatible with other variants in the μPD120Nxx series?

No-UPD120N15T1B-E1-AZ uses the SC-62 package with a 4-pin configuration (INPUT, GND, GND, OUTPUT), whereas SC-74A variants like UPD120N15TA use a 5-pin layout with different pin assignments and footprint. Direct substitution requires PCB layout revision. However, electrical behavior-including output voltage, current rating, and protection features-is consistent across same-output-voltage members of the μPD120Nxx family.

What is the output voltage tolerance of UPD120N15T1B-E1-AZ over temperature and load?

UPD120N15T1B-E1-AZ guarantees output voltage within ±30 mV (±2%) of 1.5 V across the full operating range: –40°C to +85°C ambient temperature and 0–0.3 A load current. At 25°C and 0.15 A load, typical output is 1.50 V with ±15 mV initial tolerance (VO1); under varying line and load (VO2), it remains within 1.455 V to 1.545 V. Temperature coefficient is –0.03 mV/°C, contributing less than ±3.8 mV drift over the full junction range.