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onsemi CS8371ET7G
- Part No.:
- CS8371ET7G
- Manufacturer:
- onsemi
- Package:
- TO-220-7
- Datasheet:
-
CS8371ET7G.pdf
- Description:
- IC REG LIN 8V/5V 1A/250MA TO220
- Quantity:
- Payment:
- Shipping:
Inventory:3,523
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Product details
Overview
CS8371ET7G 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 controls, NOCAP output stability (no external capacitor required for VOUT1), and 45 V load dump transient tolerance. It serves as primary power management for infotainment subsystems requiring isolated rail control.
For engineers reviewing the CS8371ET7G datasheet, pinout, applications, or equivalent options, key selection criteria include independent enable logic, NOCAP architecture for space-constrained PCBs, thermal shutdown at 150°C, and TO-220-7 package compatibility with heatsink mounting.
Technical Context
The CS8371ET7G integrates two independent LDO regulators sharing a common VCC input and GND reference. The 8.0 V channel uses a NOCAP output stage with internal compensation and a dedicated Sense pin for remote feedback, while the 5.0 V channel employs a Darlington NPN output structure inherently stable with any capacitive load.
Protection circuitry includes overvoltage shutdown (24–30 V threshold), thermal shutdown with 30°C hysteresis, short-circuit current limiting (1.1–2.5 A for VOUT1; 270–600 mA for VOUT2), and ESD robustness (±2.0 kV HBM). Sleep mode draws <10 µA when both ENABLE inputs are low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 Voltage | 8.0 V ±5% (7.6–8.4 V); regulated rail for display backlight drivers and tape motor controllers |
| Output 2 Voltage | 5.0 V ±5% (4.75–5.25 V); stable supply for tuner ICs and non-volatile memory |
| Output 1 Current | 1.0 A max; supports high-current analog front-ends without external boost stages |
| Output 2 Current | 250 mA max; sufficient for digital baseband and microcontroller peripherals |
| Dropout Voltage (VOUT1) | 1.5 V at 1.0 A; enables operation down to 9.5 V input in cold-crank automotive conditions |
| Transient Tolerance | +45 V peak (31 V load dump @ 14 V VCC); meets ISO 7637-2 Pulse 5a requirements |
| Sleep Current | <10 µA with both ENABLE pins low; minimizes battery drain during vehicle off-state |
Pinout & Package
The CS8371ET7G is housed in a 7-lead TO-220 package (Case 821E) with copper tab electrically connected to GND and thermally optimized for heatsink attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENABLE1 | CMOS-compatible enable input for 8.0 V regulator | Active-high logic (2.0–5.0 V high); enables/disables VOUT1 independently of VOUT2 |
| 2 - ENABLE2 | CMOS-compatible enable input for 5.0 V regulator | Active-high logic (2.0–5.0 V high); enables/disables VOUT2 without affecting VOUT1 |
| 3 - VOUT2 | Regulated 5.0 V output terminal | Delivers up to 250 mA; Darlington output ensures unconditional stability with zero or any capacitive load |
| 4 - GND | Common ground reference | Shared return path for both regulators and thermal tab connection point |
| 5 - Sense | Remote feedback input for 8.0 V regulator | Compensates for PCB trace IR drop; improves regulation accuracy at point-of-load |
| 6 - VCC | Main unregulated input supply | Accepts 10.5–26 V DC; withstands 45 V transients; powers both regulator channels |
| 7 - VOUT1 | Regulated 8.0 V output terminal | Delivers up to 1.0 A; NOCAP architecture eliminates need for external output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-enable control | Enables selective power sequencing-e.g., keep 5.0 V active for memory retention while disabling 8.0 V for display during standby |
| NOCAP output stage (VOUT1) | Eliminates mandatory 10–100 µF output capacitor, reducing BOM count and PCB area in space-limited automotive modules |
| Dedicated Sense pin | Supports Kelvin sensing for ±1% output voltage accuracy under dynamic load conditions across long PCB traces |
| Automotive transient immunity | Withstands +45 V load dump pulses per ISO 7637-2, enabling direct battery connection without external TVS clamping |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and re-enables only after cooling to 120°C, preventing thermal oscillation during overload |
Applications
| Automotive Radio Power Supply | Infotainment Display Subsystem |
|---|---|
Use Scenario: Dual-rail power delivery in OEM car radios where 8.0 V drives mechanical tape transport motors and vacuum fluorescent displays, while 5.0 V supplies tuner ICs and EEPROM. IC Role / Device Role / Timing Role: Primary dual-output LDO regulator providing isolated, sequenced, and transient-hardened DC rails. Use Value: Independent ENABLE pins allow sleep-mode optimization (e.g., disable 8.0 V motor rail while retaining 5.0 V for station memory), reducing quiescent current to <10 µA. | Use Scenario: Powering segmented LCD backlight drivers and touch controller in center-stack displays. IC Role / Device Role / Timing Role: Regulator supplying stable 8.0 V for LED driver bias and 5.0 V for I²C interface logic. Use Value: NOCAP architecture removes need for large output capacitors near heat-sensitive display components, improving thermal reliability and layout flexibility. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
Use Scenario: Providing clean, sequenced power to GPS baseband processors and cellular modem RF sections. IC Role / Device Role / Timing Role: Dual-rail regulator managing power-up timing between baseband (5.0 V) and RF front-end (8.0 V) domains. Use Value: Separate ENABLE lines support precise power sequencing-e.g., assert ENABLE2 first to initialize digital core before enabling ENABLE1 for RF bias-reducing startup glitches. | Use Scenario: Powering door lock actuators (8.0 V) and CAN transceiver logic (5.0 V) within distributed body electronics nodes. IC Role / Device Role / Timing Role: Automotive-grade dual LDO delivering fault-tolerant, transient-immune rails for mixed-signal actuator control. Use Value: 45 V load dump tolerance allows direct connection to vehicle battery without additional protection circuitry, simplifying design and lowering system cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70733PDPWR | Single 3.3 V output, 300 mA, no NOCAP, no Sense pin, SOT-23-5 package | Lacks dual-rail capability and automotive transient rating; suitable only for low-power consumer subsystems | Select only if application requires only one regulated rail and operates below 20 V input. |
| TPS7B8133QDGNRQ1 | Single 3.3 V output, 150 mA, AEC-Q100 qualified, 40 V transient tolerance, MSOP-8 | No second output; lower current capacity; lacks independent enable and Sense functionality | Choose when single-rail, high-reliability automotive compliance is sufficient and board space is constrained. |
Compared with TLV70733PDPWR and TPS7B8133QDGNRQ1, the CS8371ET7G uniquely delivers two independently enabled, high-current, automotive-transient-hardened outputs in a single TO-220 package-with NOCAP and Sense features that reduce component count and improve point-of-load regulation accuracy.
Availability
CS8371ET7G is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, and body electronics modules requiring stable component supply, AEC-Q100-aligned performance, and long-term lifecycle continuity.
Supply support for CS8371ET7G 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 manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The CS8371ET7G belongs to onsemi's SMART REGULATOR® family-designed specifically for automotive power systems requiring high transient immunity, independent rail control, and capacitor-free stability in space- and thermal-constrained environments.
FAQ
What is the maximum input voltage the CS8371ET7G can withstand during load dump events?
The CS8371ET7G is rated for +45 V peak transient voltage under load dump conditions (per ISO 7637-2 Pulse 5a), making it suitable for direct connection to automotive battery rails without external TVS diodes. This rating applies to transients occurring at nominal VCC = 14 V, and the device remains functional after exposure without latch-up or parametric shift.
Does the CS8371ET7G require external output capacitors for stability?
The CS8371ET7G's 8.0 V output (VOUT1) uses NOCAP technology and is stable without any external output capacitor. The 5.0 V output (VOUT2) employs a Darlington NPN structure and is also inherently stable with zero, small, or large capacitive loads-no minimum ESR or capacitance is mandated for either rail.
How does the Sense pin (Pin 5) improve regulation accuracy in the CS8371ET7G?
The Sense pin on the CS8371ET7G provides remote feedback for the 8.0 V regulator, allowing the IC to monitor voltage directly at the load instead of at the VOUT1 pin. This compensates for IR drop across PCB traces or connectors, maintaining ±5% output accuracy even with 100 mΩ series resistance between VOUT1 and the load.
What thermal protection mechanisms are built into the CS8371ET7G?
The CS8371ET7G incorporates thermal shutdown that activates at 150°C junction temperature and includes 30°C hysteresis-re-enabling only after die temperature falls to ~120°C. This prevents cycling during sustained overload and is guaranteed by design, not characterized statistically. Junction temperature is monitored continuously and overrides all other functions when exceeded.
Can both outputs of the CS8371ET7G be enabled simultaneously, and what is the total quiescent current in that state?
Yes, both ENABLE1 and ENABLE2 can be asserted high simultaneously to activate both outputs. Under full-load conditions (IOUT1 = 1.0 A, IOUT2 = 250 mA, VCC = 14 V), the CS8371ET7G draws ≤30 mA total quiescent current. In sleep mode (both ENABLE pins low), quiescent current drops to ≤10 µA-critical for vehicle-off battery conservation.
CS8371ET7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-7
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 8V, 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 1A, 2.5V @ 250mA
- Current - Output:
- 1A, 250mA
- Current - Quiescent (Iq):
- 7 mA
- Current - Supply (Max):
- 30 mA
- PSRR:
- 90dB ~ 67dB (120Hz ~ 20kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Over Voltage, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-7
CS8371ET7G FAQ
1.How can I place an order for CS8371ET7G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8371ET7G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CS8371ET7G reliable?
The price and inventory of CS8371ET7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8371ET7G is usually 5 days.
3.What payment methods are accepted for CS8371ET7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8371ET7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8371ET7G?
CS8371ET7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8371ET7G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CS8371ET7G?
For technical support, including CS8371ET7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8371ET7G requirements.
6.How does Aetrix verify that CS8371ET7G is sourced from the original manufacturer or authorized distributors?
All CS8371ET7G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CS8371ET7G meets industry standards.
7.What is the process for return or replacement of CS8371ET7G?
All CS8371ET7G units undergo pre-shipment inspection (PSI). If there is an issue with CS8371ET7G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CS8371ET7G part is unused and in its original packaging.
Return procedure for CS8371ET7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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