onsemi CS8371ETVA7

Overview

CS8371ETVA7 from onsemi is a dual-output linear voltage regulator delivering 8.0 V ±5% at 1.0 A and 5.0 V ±5% at 250 mA, with independent ENABLE control per output and NOCAP technology eliminating external output capacitors. It operates from 10.5–16 V input, withstands +45 V load dump transients, and targets automotive power rails for displays, tuner ICs, and memory subsystems.

For engineers reviewing the CS8371ETVA7 datasheet, pinout, applications, or equivalent options, key selection criteria include independent enable logic, no-output-capacitor stability for the 8.0 V rail, thermal shutdown at 150 °C, and TO-220 vertical-tab package compatibility with heatsinking in space-constrained automotive modules.

Technical Context

The CS8371ETVA7 integrates two independent LDO regulators: an 8.0 V output using ON Semiconductor's proprietary NOCAP architecture (internally compensated, >100 kHz unity-gain bandwidth, no overshoot), and a 5.0 V output with Darlington NPN structure inherently stable with any capacitive load. Each regulator features dedicated ENABLE inputs, separate sense feedback (pin 5 for VOUT1), and fault protection including overvoltage shutdown at 24–30 V, short-circuit current limiting, and thermal shutdown with 30 °C hysteresis.

It supports automotive-grade operation across −40 °C to +150 °C junction temperature, handles 45 V transient peaks per ISO 7637-2, and maintains <10 µA sleep-mode quiescent current when both ENABLE pins are low. The device draws bias current only from VCC (pin 6) and routes GND (pin 4) as common return for both outputs and internal circuitry.

Key Specifications

Pinout & Package

The CS8371ETVA7 uses a 7-lead TO-220 vertical-tab package (Case 821J), with copper tab electrically connected to GND (pin 4) for direct heatsink mounting and thermal conduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output linear regulator applications.

Compared with TLV70733PDPKR and TPS7B8133QDGNRQ1, the CS8371ETVA7 uniquely delivers dual-rail independence, automotive-grade transient immunity, and capacitor-free 8.0 V regulation-making it irreplaceable in legacy radio architectures requiring physical separation of analog and digital power domains.

Availability

CS8371ETVA7 is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument cluster power management, and body control module designs requiring stable component supply across extended temperature and high-reliability automotive environments.

Supply support for CS8371ETVA7 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The CS8371ETVA7 belongs to onsemi's SMART REGULATOR® family-designed specifically for automotive power systems requiring high transient immunity, dual-rail flexibility, and simplified board-level design through innovations like NOCAP and integrated protection.

FAQ

What is the maximum input voltage the CS8371ETVA7 can withstand during load dump events?

The CS8371ETVA7 is rated for +45 V peak transient voltage per ISO 7637-2 Pulse 5a, allowing direct connection to automotive battery rails without external TVS diodes. This specification is validated under 31 V load dump at 14 V nominal VCC and ensures reliable operation in harsh vehicle electrical environments. The CS8371ETVA7 internal overvoltage shutdown activates above 24–30 V, providing redundant protection beyond the 45 V transient rating.

Does the CS8371ETVA7 require external output capacitors for stability?

The CS8371ETVA7's 8.0 V output (VOUT1) uses NOCAP technology and is stable with zero external output capacitance; the 5.0 V output (VOUT2) employs a Darlington NPN structure inherently stable with any capacitive load or no capacitor. Neither output requires mandatory external capacitors for basic regulation, though optional bulk capacitance may be added for large transient load currents. The CS8371ETVA7 datasheet confirms stability across temperature, line, and load without compensation components.

How does the ENABLE functionality work on the CS8371ETVA7?

The CS8371ETVA7 features two independent CMOS-compatible ENABLE inputs: ENABLE1 (pin 1) controls the 8.0 V output, and ENABLE2 (pin 2) controls the 5.0 V output. Both inputs assert high (≥2.0 V) to activate their respective regulator and go low (≤0.8 V) to disable it. When both ENABLEs are low, the CS8371ETVA7 enters sleep mode with <10 µA quiescent current. This enables precise subsystem-level power sequencing in automotive ECUs.

What thermal performance can be expected from the CS8371ETVA7 in a TO-220 vertical-tab package?

The CS8371ETVA7 in its TO-220 vertical-tab package (Case 821J) has a typical junction-to-case thermal resistance (RJC) of 2.4 °C/W and junction-to-ambient (RJA) of 50 °C/W. With the copper tab connected to a heatsink, thermal performance improves significantly-equation (3) in the datasheet shows RJA = RJC + RCS + RSA. At 1.0 A load on VOUT1 and 250 mA on VOUT2 with 14 V input, power dissipation reaches ~8.5 W; proper heatsinking keeps junction temperature below 150 °C even at +85 °C ambient. The CS8371ETVA7 includes thermal shutdown at 150 °C with 30 °C hysteresis.

Is the CS8371ETVA7 suitable for AEC-Q100 qualified automotive applications?

The CS8371ETVA7 is designed for automotive environments and meets critical requirements including −40 °C to +150 °C junction temperature range, 45 V load dump tolerance, and built-in protection against overvoltage, short-circuit, and thermal runaway. While the datasheet does not explicitly state AEC-Q100 qualification, its specifications align with Grade 2 (−40 °C to +105 °C ambient) and Grade 3 (−40 °C to +125 °C ambient) stress test profiles. Customers must validate final system-level compliance per AEC-Q100 Rev-H, but the CS8371ETVA7's architecture and test data provide foundational suitability for automotive use cases.