onsemi CS8371ETVA7G

Overview

CS8371ETVA7G from onsemi is an automotive-grade dual-output linear regulator delivering 8.0 V ±5% at 1.0 A and 5.0 V ±5% at 250 mA, with independent ENABLE1/ENABLE2 control, NOCAP output stability (no external capacitor required for 8.0 V output), and 45 V load dump transient tolerance. It serves as a primary power management IC in automotive infotainment systems.

For engineers reviewing the CS8371ETVA7G datasheet, pinout, applications, or equivalent options, key selection criteria include independent enable control per rail, thermal shutdown at 150 °C, sleep mode current <10 µA, NOCAP architecture eliminating output capacitance for VOUT1, and TO-220-7 vertical package with copper tab for heatsinking.

Technical Context

The CS8371ETVA7G integrates two independent LDO regulators: a high-current 8.0 V channel using ON Semiconductor's proprietary NOCAP output stage (internally compensated, >100 kHz unity-gain bandwidth, no overshoot) and a 5.0 V channel with Darlington NPN output inherently stable with any capacitive load. Each regulator features dedicated sense (VOUT1) or direct feedback (VOUT2), separate current limiting (1.1–2.5 A / 270–600 mA), and CMOS-compatible ENABLE inputs.

Fault protection includes overvoltage shutdown (24–30 V), thermal shutdown with 30 °C hysteresis, short-circuit limiting, and 45 V peak transient tolerance-enabling direct battery connection in 12 V automotive systems. The device operates across −40 °C to +150 °C junction temperature and supports sleep mode via simultaneous low ENABLE assertion.

Key Specifications

Pinout & Package

CS8371ETVA7G uses a 7-lead TO-220 vertical package (Case 821J) with copper tab electrically connected to GND (Pin 4), enabling direct heatsink mounting. Thermal resistance R_JA = 50 °C/W (typ), R_JC = 2.4 °C/W (typ).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70733PDQNR and TPS7B8750QKVURQ1, the CS8371ETVA7G uniquely integrates two independently enabled, automotive-qualified rails with NOCAP and 45 V transient tolerance in a single TO-220 package-reducing board area, BOM count, and design validation effort for dual-rail automotive systems.

Availability

CS8371ETVA7G is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and ADAS camera modules requiring stable component supply, long lifecycle support, and AEC-Q100-aligned reliability.

Supply support for CS8371ETVA7G 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 CS8371ETVA7G belongs to onsemi's SMART REGULATOR® family-designed specifically for automotive power systems requiring high transient immunity, integrated protection, and simplified layout through innovations like NOCAP.

FAQ

What is the maximum input voltage the CS8371ETVA7G can withstand during load dump events?

The CS8371ETVA7G is rated for +45 V peak transient voltage per ISO 7637-2 Pulse 5a, making it suitable for direct connection to automotive 12 V battery systems without external transient suppression. This rating applies to the VCC pin and is guaranteed across the full operating temperature range (−40 °C to +150 °C). The device enters overvoltage shutdown above 24–30 V to protect internal circuitry, then recovers automatically once input returns to safe levels. This capability eliminates the need for external TVS diodes in most automotive radio and head unit designs.

Does the CS8371ETVA7G require external output capacitors for stability?

The CS8371ETVA7G's 8.0 V output (VOUT1) uses NOCAP technology and is stable without any external output capacitor-verified across temperature, line, and load variations. The 5.0 V output (VOUT2) employs a Darlington NPN structure and is inherently stable with or without external capacitance. While optional capacitors may improve transient response for high-dV/dt loads, they are not required for basic regulation or stability per the datasheet. This eliminates typical LDO capacitor selection challenges related to ESR, value, and board layout sensitivity.

How does independent ENABLE control benefit system design with the CS8371ETVA7G?

Independent ENABLE1 and ENABLE2 pins allow precise power sequencing: for example, enabling the 5.0 V rail first to power a tuner IC's logic before asserting ENABLE1 to deliver 8.0 V to display drivers or tape motors. This prevents bus contention, inrush current stacking, and improper initialization in automotive infotainment systems. Each ENABLE input draws less than 150 µA and is CMOS-compatible (0.8 V low / 2.0 V high thresholds), enabling direct interfacing with microcontroller GPIOs without level-shifting. Simultaneous low assertion places the entire IC into sleep mode with total quiescent current below 10 µA.

What thermal management considerations apply to the CS8371ETVA7G in high-power operation?

The CS8371ETVA7G uses a TO-220-7 vertical package with a copper tab tied to GND (Pin 4), designed for direct heatsink attachment. With R_JC = 2.4 °C/W (typ) and R_JA = 50 °C/W (typ), full 1.0 A output at 8.0 V (with ~10 W dissipation at 14 V input) requires a heatsink to maintain junction temperature ≤150 °C. Equation (2) from the datasheet-R_JA ≤ (150 °C − T_A) / P_D-must be satisfied. For ambient temperatures up to 85 °C, a heatsink with R_SA ≤ 15 °C/W is recommended when dissipating >3 W continuously. PCB copper area under the tab also contributes significantly to thermal performance.

Is the CS8371ETVA7G AEC-Q100 qualified, and what automotive standards does it meet?

The CS8371ETVA7G is engineered for automotive environments and meets critical requirements including 45 V load dump transient tolerance (ISO 7637-2 Pulse 5a), operation from −40 °C to +150 °C junction temperature, and built-in protection against overvoltage, short-circuit, and thermal runaway. While the datasheet does not state formal AEC-Q100 certification, its design targets AEC-Q100 stress test conditions-particularly for temperature cycling, humidity, and transient immunity. Customers requiring certified qualification should consult onsemi's official AEC-Q100 status documentation for CS8371ETVA7G, as qualification status may vary by date code and manufacturing lot.