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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi CS8122YTVA5G

Name: CS8122YTVA5G
Brand: onsemi
SKU: CS8122YTVA5G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CS8122YTVA5G

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-220-5 Formed Leads

Datasheet:: CS8122YTVA5G.pdf

Description:: IC REG LIN 5V 750MA TO220-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CS8122YTVA5G from onsemi is a precision 5.0 V ±2.0% low-dropout linear regulator delivering up to 750 mA output current with 0.6 V dropout at 500 mA, integrated delayed RESET function programmed via external capacitor, and robust fault protection including −50 V reverse transient, 60 V load dump, short-circuit (1.2 A typ), and thermal shutdown - used in automotive body control modules for stable microcontroller power sequencing.

For engineers reviewing the CS8122YTVA5G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for automotive-grade power management design.

Technical Context

The CS8122YTVA5G integrates a bandgap reference, error amplifier, anti-saturation current-limit circuit, and dual hysteresis comparators for RESET and delay functions - enabling reliable power-on reset generation down to 1.0 V output voltage. Its latching discharge circuit fully discharges the external delay capacitor upon any out-of-regulation event, ensuring deterministic RESET pulse width.

It features internally limited power dissipation, operates across −40°C to +125°C ambient, supports input voltage range of −0.5 V to 26 V, and maintains regulation under 120 Hz ripple with 75 dB typical rejection - all while sustaining CMOS/TTL-compatible open-collector RESET output with 150–250 mV hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V ±2.0% - ensures microcontroller supply meets tight VDD tolerance requirements without external trimming.
Dropout Voltage	0.6 V @ 500 mA - enables stable 5 V output from as low as 5.6 V input, critical for cold-crank automotive operation.
Output Current	750 mA continuous - sufficient to power MCU, CAN transceiver, and sensor interface ICs in single-rail systems.
RESET Threshold	V_RT(ON) = 4.65–4.90 V, V_RT(OFF) = 4.50–4.70 V - provides clean, noise-immune reset assertion during brownout recovery.
Delay Time	16–48 ms with 0.1 µF capacitor - configurable reset hold-off prevents spurious resets during transient dips.
Fault Protection	−50 V reverse transient, 60 V load dump, short-circuit (1.2 A typ), thermal shutdown - meets ISO 7637-2 Pulse 1/2/3a/3b and ISO 16750-2 requirements.
Ripple Rejection	75 dB @ 120 Hz - suppresses alternator ripple to prevent false resets or logic errors in downstream digital circuits.

Pinout & Package

CS8122YTVA5G is housed in a Pb-free TO-220-5L vertical-mount package (Case 314K) with copper tab for heatsink attachment; R_JA = 50°C/W, R_JC = 2.1°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Unregulated input supply	Accepts −0.5 V to 26 V; withstands −50 V reverse transients and 60 V load dump pulses.
2 - VOUT	Regulated 5.0 V output	Delivers up to 750 mA; requires ≥10 µF output capacitor with ESR ≥0.1 Ω for stability.
3 - GND	Ground reference	Common return path for internal bias, RESET discharge, and delay current sink.
4 - Delay	Timing capacitor connection	Sources 5–15 µA charge current; sinks current to discharge C_DELAY when VOUT falls below V_RT(OFF).
5 - RESET	Open-collector reset output	Active-low CMOS/TTL-compatible signal; pulls low when VOUT < 4.5 V and stays low for programmed delay.

Key Features

Feature	Design Value
Externally programmable RESET delay	Enables precise reset timing control (16–48 ms) using one capacitor - eliminates need for external timer ICs.
Dual hysteresis comparators	200–800 mV hysteresis on both RESET and delay thresholds - prevents chatter during slow-rising/falling VOUT transitions.
Latching delay capacitor discharge	Ensures full discharge of C_DELAY after any brief fault - guarantees minimum RESET pulse width regardless of fault duration.
Automotive-grade transient protection	Withstands −50 V reverse battery, 60 V load dump, and +40 V overvoltage - reduces need for external TVS diodes in cost-sensitive designs.
Pb-free TO-220 vertical package	Case 314K footprint enables direct PCB mounting with heatsink access through copper tab - simplifies thermal management in space-constrained ECUs.

Applications

Body Control Module (BCM)	Engine Control Unit (ECU) Power Sequencing
Use Scenario: Powers 32-bit MCU, LIN transceiver, and door lock actuator drivers in vehicle body electronics. IC Role / Device Role / Timing Role: Primary 5 V supply with programmable power-on reset and brownout detection. Use Value: Ensures deterministic MCU boot after ignition key turn by holding RESET until VOUT stabilizes above 4.65 V for ≥32 ms.	Use Scenario: Supplies auxiliary 5 V rail for sensor signal conditioning and EEPROM interface in engine management systems. IC Role / Device Role / Timing Role: Secondary regulated source with fault-isolated RESET signaling to main controller. Use Value: Prevents erroneous sensor readings during cranking by asserting RESET until battery voltage recovers above 11.5 V and VOUT reaches regulation.
Advanced Driver Assistance Systems (ADAS) Camera ECU	Electric Power Steering (EPS) Control Board
Use Scenario: Provides clean 5 V supply to image signal processor and serializer in rear-view camera module. IC Role / Device Role / Timing Role: Low-noise LDO with high PSRR and transient immunity for analog front-end stability. Use Value: Maintains 75 dB ripple rejection at 120 Hz to eliminate horizontal banding artifacts caused by alternator noise.	Use Scenario: Powers motor gate driver logic and position sensor interface in EPS electronic control unit. IC Role / Device Role / Timing Role: Fault-tolerant 5 V regulator with immediate short-circuit shutdown and thermal foldback. Use Value: Limits peak fault current to 1.2 A and initiates thermal shutdown at 150°C - protects MOSFET drivers during phase loss or stall conditions.

Body Control Module (BCM)

Engine Control Unit (ECU) Power Sequencing

Use Scenario: Powers 32-bit MCU, LIN transceiver, and door lock actuator drivers in vehicle body electronics.

IC Role / Device Role / Timing Role: Primary 5 V supply with programmable power-on reset and brownout detection.

Use Value: Ensures deterministic MCU boot after ignition key turn by holding RESET until VOUT stabilizes above 4.65 V for ≥32 ms.

Use Scenario: Supplies auxiliary 5 V rail for sensor signal conditioning and EEPROM interface in engine management systems.

IC Role / Device Role / Timing Role: Secondary regulated source with fault-isolated RESET signaling to main controller.

Use Value: Prevents erroneous sensor readings during cranking by asserting RESET until battery voltage recovers above 11.5 V and VOUT reaches regulation.

Advanced Driver Assistance Systems (ADAS) Camera ECU

Electric Power Steering (EPS) Control Board

Use Scenario: Provides clean 5 V supply to image signal processor and serializer in rear-view camera module.

IC Role / Device Role / Timing Role: Low-noise LDO with high PSRR and transient immunity for analog front-end stability.

Use Value: Maintains 75 dB ripple rejection at 120 Hz to eliminate horizontal banding artifacts caused by alternator noise.

Use Scenario: Powers motor gate driver logic and position sensor interface in EPS electronic control unit.

IC Role / Device Role / Timing Role: Fault-tolerant 5 V regulator with immediate short-circuit shutdown and thermal foldback.

Use Value: Limits peak fault current to 1.2 A and initiates thermal shutdown at 150°C - protects MOSFET drivers during phase loss or stall conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5 V automotive LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV73350PDBVR	300 mA output, 170 mV dropout, no RESET, SOT-23-5 package	Lacks RESET, delay, and automotive transient protection; rated only to 125°C junction	Use only in non-automotive, low-current, non-reset-critical applications where board space is constrained.
TPS7B6950QDCYRQ1	150 mA output, 300 mV dropout, integrated RESET with fixed 200 ms delay, wettable flank QFN	Lower current, fixed delay, no external RC programming; qualified to AEC-Q100 Grade 1 (−40°C to +125°C)	Select when RESET timing must be factory-fixed and footprint size is prioritized over output current capability.

Compared with TLV73350PDBVR and TPS7B6950QDCYRQ1, the CS8122YTVA5G uniquely combines 750 mA drive, programmable RESET delay, and full ISO 7637-2 transient immunity - making it the only option among the three suitable for high-current automotive control modules requiring field-configurable reset timing.

Availability

CS8122YTVA5G is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera ECUs, and electric power steering systems requiring stable component supply across extended temperature and harsh electrical environments.

Supply support for CS8122YTVA5G 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 focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.

The CS8122YTVA5G belongs to onsemi's SMART REGULATOR® family - engineered specifically for automotive power management with integrated protection, precise reset control, and ruggedized packaging for under-hood deployment.

FAQ

What is the maximum input voltage rating for CS8122YTVA5G?

The CS8122YTVA5G supports an absolute maximum input voltage of 26 V under normal operation. It also withstands transient overvoltages up to +60 V (load dump) and reverse transients down to −50 V - meeting ISO 7637-2 Pulse 1, 2a, 3a, and 3b test requirements. These ratings are guaranteed across the full −40°C to +125°C operating ambient range, and do not require external clamping components.

How does the RESET delay function work in CS8122YTVA5G?

The CS8122YTVA5G uses an external capacitor connected to the Delay pin (Pin 4) to set RESET assertion time. A precision 5–15 µA charge current ramps the capacitor voltage; RESET remains low until this voltage exceeds 3.50 V (typ). If VOUT drops below 4.50 V, the internal latching discharge circuit fully drains the capacitor - guaranteeing a fresh delay cycle starts upon recovery. Typical delay with 0.1 µF is 32 ms.

Can CS8122YTVA5G be used without an output capacitor?

No - CS8122YTVA5G requires a minimum 10 µF output capacitor with ≥0.1 Ω ESR for loop stability, as specified in the datasheet Figure 13 and Application Notes section. Ceramic capacitors with near-zero ESR cause oscillation; tantalum or aluminum electrolytic types are recommended. Omitting C_OUT or using undersized/low-ESR types risks sustained output ringing and potential system malfunction.

What thermal management is required for CS8122YTVA5G at 750 mA output?

At 750 mA and 14 V input, CS8122YTVA5G dissipates ~6.75 W. With R_JA = 50°C/W, junction temperature rise would exceed safe limits without heatsinking. The TO-220-5L copper tab must be mounted to a heatsink; using R_JC = 2.1°C/W and a 10°C/W heatsink yields ~45°C rise - keeping T_J within 150°C max. Derating curves in Figure 8 confirm 750 mA is sustainable only with adequate heatsink area and airflow.

Is CS8122YTVA5G pin-compatible with CS8126?

Yes - CS8122YTVA5G is a direct replacement for CS8126 in the same TO-220-5L package with identical pinout (VIN, VOUT, GND, Delay, RESET) and mechanical footprint. Key improvements include tighter output voltage tolerance (±2.0% vs. ±4.0%) and enhanced transient immunity, but no PCB layout changes are needed when upgrading from CS8126 to CS8122YTVA5G.

CS8122YTVA5G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-5 Formed Leads

Packaging:: Tube

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 26V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.6V @ 500mA

Current - Output:: 750mA

Current - Quiescent (Iq):: 70 mA

Current - Supply (Max):: 100 mA

PSRR:: 75dB (120Hz)

Control Features:: Reset

Protection Features:: Over Temperature, Over Voltage, Reverse Polarity, Short Circuit

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-5 Vertical

CS8122YTVA5G FAQ

1.How can I place an order for CS8122YTVA5G through Aetrix?

Please submit a Request for Quotation (RFQ) for CS8122YTVA5G 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 CS8122YTVA5G reliable?

The price and inventory of CS8122YTVA5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8122YTVA5G is usually 5 days.

3.What payment methods are accepted for CS8122YTVA5G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8122YTVA5G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CS8122YTVA5G?

CS8122YTVA5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CS8122YTVA5G 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 CS8122YTVA5G?

For technical support, including CS8122YTVA5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8122YTVA5G requirements.

6.How does Aetrix verify that CS8122YTVA5G is sourced from the original manufacturer or authorized distributors?

All CS8122YTVA5G 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 CS8122YTVA5G meets industry standards.

7.What is the process for return or replacement of CS8122YTVA5G?

All CS8122YTVA5G units undergo pre-shipment inspection (PSI). If there is an issue with CS8122YTVA5G, 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 CS8122YTVA5G part is unused and in its original packaging.

Return procedure for CS8122YTVA5G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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