Renesas HA179L08U-TL-E

Overview

HA179L08U-TL-E from Renesas Electronics is a three-terminal negative fixed-voltage linear regulator delivering –8 V output with ±4% tolerance, 1.3 V dropout voltage, and 800 mW maximum power dissipation in UPAK package. It integrates overcurrent and overtemperature protection and is optimized for audio-frequency ripple rejection (up to 65 dB typical).

For engineers reviewing the HA179L08U-TL-E datasheet, HA179L08U-TL-E pinout, HA179L08U-TL-E application, or HA179L08U-TL-E equivalent, key selection criteria include negative rail regulation in space-constrained commercial systems, thermal performance on alumina ceramic boards, load regulation stability under 40 mA, and compatibility with standard 0.33 µF input / 0.1 µF output capacitor values.

Technical Context

The HA179L08U-TL-E employs an internal bandgap reference, error amplifier, and thermal shutdown circuitry to maintain stable –8 V output across input voltages from –11 V to –23 V. Its architecture supports operation from –40°C to +85°C ambient without external compensation.

Designed for low-noise analog subsystems, it achieves 65 dB typical ripple rejection at 120 Hz and maintains ≤40 mV load regulation over 1–40 mA output current. Quiescent current remains ≤4.0 mA with <1.0 mA variation across line and load conditions.

Key Specifications

Pinout & Package

HA179L08U-TL-E is housed in the UPAK (SC-62) surface-mount package measuring 4.8×3.8×0.7 mm, with gull-wing leads and laser-marked top-side identification including "9E" for –8 V output.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar negative fixed-voltage regulation applications.

Compared with LM7908CDT/NOPB and MC79L08CP, HA179L08U-TL-E offers superior audio-frequency noise suppression and optimized surface-mount packaging for space-constrained commercial electronics, while maintaining identical –8 V output specification and protection features.

Availability

HA179L08U-TL-E is available at Aetrix Electronics and suitable for audio preamplifiers, industrial sensor transmitters, RS-232 interface modules, and portable medical instruments requiring stable component supply and commercial-grade reliability.

Supply support for HA179L08U-TL-E 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and consumer markets.

The HA179L00 series was designed to replace discrete Zener-based negative regulators in cost-sensitive commercial applications, emphasizing small footprint, integrated protection, and audio-grade noise performance.

FAQ

What is the maximum input voltage rating for HA179L08U-TL-E?

The absolute maximum input voltage for HA179L08U-TL-E is –35 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable regulation, the recommended input range is –11 V to –23 V, ensuring sufficient headroom for the 1.3 V dropout while maintaining thermal safety within the 800 mW power limit on a standard alumina ceramic board.

Does HA179L08U-TL-E require external capacitors, and what values are recommended?

Yes, HA179L08U-TL-E requires two external capacitors: a minimum 0.33 µF ceramic capacitor at the input and a minimum 0.1 µF ceramic capacitor at the output. These values are validated in the datasheet's Electrical Characteristics section for all test conditions (e.g., VIN = –14 V, IOUT = 40 mA). Using smaller or non-ceramic types may degrade ripple rejection, load regulation, or stability-especially under transient load changes.

How does the thermal performance of HA179L08U-TL-E compare between mounted and unmounted conditions?

When mounted on a 15 mm × 25 mm × 0.7 mm alumina ceramic board, HA179L08U-TL-E sustains 800 mW at Ta ≤ 25°C, derating by 6.4 mW/°C above that temperature. In unmounted (free-air) conditions, its power dissipation capability drops significantly-data shows ~600 mW at 25°C. This difference directly impacts PCB layout decisions: adequate copper area and thermal vias are essential to achieve rated performance, especially in enclosed or high-ambient environments.

Is HA179L08U-TL-E suitable for automotive applications?

No, HA179L08U-TL-E is designated for commercial-use applications per the Ordering Information table and falls under Renesas' "Standard" quality grade. It is not qualified for automotive (AEC-Q100), transportation, or safety-critical systems. Its operating ambient temperature range (–40°C to +85°C) meets industrial requirements but lacks automotive-specific stress testing, extended temperature validation, or failure-in-time (FIT) reporting required for vehicle ECUs or ADAS modules.

What marking code identifies HA179L08U-TL-E on the UPAK package?

The HA179L08U-TL-E is laser-marked on the UPAK package with "9E" as the product-specific code, per Table 1 in the datasheet. This two-character mark appears in position (1)–(2) of the top-side marking layout. Additional codes indicate production year (last digit), month (A=Jan, B=Feb, etc.), and week-ensuring traceability without affecting electrical function or part identification.