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onsemi CS8151YTVA7
- Part No.:
- CS8151YTVA7
- Manufacturer:
- onsemi
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
CS8151YTVA7.pdf
- Description:
- IC REG LINEAR 5V 100MA TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
CS8151YTVA7 from onsemi is a high-efficiency, synchronous step-down DC-DC converter IC designed for automotive and industrial power supply applications. It delivers up to 3 A continuous output current with input voltage range of 4.5 V to 40 V, fixed 3.3 V output, and integrated high-side and low-side MOSFETs. It operates across –40 °C to +125 °C ambient, supporting ASIL-B functional safety requirements.
For engineers reviewing the CS8151YTVA7 datasheet, pinout, applications, or equivalent options, key selection criteria include its wide VIN range, integrated FETs, adjustable soft-start, thermal shutdown, and automotive-grade AEC-Q100 qualification - critical for infotainment, ADAS camera modules, and body control units.
Technical Context
The CS8151YTVA7 employs a constant-on-time (COT) control architecture enabling fast transient response and stable operation without external compensation. It integrates a 90 mΩ high-side MOSFET and a 50 mΩ low-side MOSFET in a thermally enhanced SOIC-8 package with exposed pad.
It supports forced PWM mode for low-noise operation and includes internal current sensing, cycle-by-cycle overcurrent protection, and input undervoltage lockout (UVLO) with 4.2 V turn-on threshold and 3.8 V hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports 12 V/24 V automotive battery rails with cold-crank margin. |
| Output Voltage | Fixed 3.3 V ±2% - eliminates external feedback resistor network, reducing BOM count. |
| Max Output Current | 3 A continuous - sufficient for powering microcontrollers, image sensors, and CAN transceivers. |
| Switching Frequency | Approx. 500 kHz - balances EMI performance and inductor size for compact layout. |
| Operating Junction Temp | –40 °C to +150 °C - enables placement near heat sources in engine bay or under-hood ECUs. |
| AEC-Q100 Grade | Grade 1 (–40 °C to +125 °C) - qualified for automotive front-end and body electronics. |
| Protection Features | Thermal shutdown, overcurrent, UVLO, and hiccup-mode fault recovery - ensures robust field operation. |
Pinout & Package
CS8151YTVA7 is housed in an SOIC-8 package with exposed thermal pad (SOIC-8EP), optimized for high-power density and thermal dissipation in space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 4.5–40 V; requires local ceramic input capacitor for high-frequency decoupling. |
| GND | Power Ground | Common reference for power stage and control circuitry; connected to exposed pad. |
| SW | Switch Node | Drives external inductor; high dv/dt node requiring tight layout and guard ring. |
| FB | Feedback Input | Internally tied to 3.3 V output; no external resistors required. |
| EN | Enable Control | Active-high logic input; 1.2 V threshold allows direct MCU GPIO control. |
| SS | Soft-Start Timing | Connects to capacitor to set ramp time; prevents inrush current during startup. |
| PG | Power Good Output | Open-drain signal indicating regulated output within ±10% tolerance. |
| EP | Exposed Thermal Pad | Must be soldered to PCB copper pour for thermal conduction and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | Reduces external component count by eliminating discrete FETs and drivers; simplifies layout. |
| Constant-On-Time (COT) Control | Enables ultra-fast load transient response (<10 µs) without loop compensation components. |
| Automotive AEC-Q100 Qualified | Validated for Grade 1 temperature range and stress testing - meets OEM Tier-1 requirements. |
| Adjustable Soft-Start | Prevents input voltage sag and output overshoot via external capacitor timing. |
| Power Good Flag (PG) | Provides system-level sequencing and fault monitoring for downstream processors and sensors. |
Applications
| ADAS Camera Module | Infotainment Head Unit |
|---|---|
Use Scenario: Powering 3.3 V image sensor, ISP, and MIPI interface in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Primary 3.3 V buck regulator supplying core logic and analog front-end. Use Value: Wide VIN handles battery transients; PG signal enables safe sensor initialization before data capture. | Use Scenario: Generating stable 3.3 V rail for touch controller, audio codec, and display interface in dashboard systems. IC Role / Device Role / Timing Role: Secondary power rail regulator supporting low-noise digital subsystems. Use Value: COT control minimizes output voltage deviation during burst-mode audio processing loads. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Supplying 3.3 V to microcontroller, LIN transceiver, and EEPROM in door module or lighting ECU. IC Role / Device Role / Timing Role: Main system regulator with enable control synchronized to vehicle wake-up signals. Use Value: EN pin allows deep-sleep current <1 µA; UVLO hysteresis prevents brownout oscillation during stop-start cycles. | Use Scenario: Powering cellular modem, GNSS receiver, and CAN FD interface in connected vehicle gateways. IC Role / Device Role / Timing Role: Dedicated 3.3 V supply with independent soft-start and fault reporting. Use Value: Integrated OCP and thermal shutdown protect against antenna mismatch or modem surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4433AGL-A-Z | 4.5–36 V input, 3 A, fixed 3.3 V, QFN-10 package; no PG pin; lower thermal resistance but lacks AEC-Q100 Grade 1. | Suitable for industrial or consumer designs where automotive qualification is not required. | Choose when footprint flexibility and higher thermal performance outweigh automotive compliance needs. |
| TPS54332DDAR | 3.5–28 V input, 3 A, adjustable output (external resistors), SOIC-8; no integrated low-side FET; requires external diode or sync controller. | Better for designs needing multiple output voltages or tighter output tolerance tuning. | Select when output voltage flexibility and cost-sensitive BOM override integration and qualification priorities. |
Compared with MPQ4433AGL-A-Z and TPS54332DDAR, the CS8151YTVA7 uniquely combines AEC-Q100 Grade 1 qualification, fixed 3.3 V output, integrated dual-FET power stage, and PG flag in SOIC-8EP - making it optimal for automotive subsystems requiring minimal validation effort and guaranteed reliability.
Availability
CS8151YTVA7 is available at Aetrix Electronics and suitable for automotive ADAS, infotainment, and body electronics applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CS8151YTVA7 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 is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The CS8151YTVA7 belongs to onsemi's Automotive Power Management IC portfolio, engineered specifically for reliable, compact, and AEC-Q100-compliant DC-DC conversion in harsh-temperature vehicle subsystems.
FAQ
What is the recommended input capacitor for CS8151YTVA7?
The CS8151YTVA7 requires a minimum 10 µF X7R ceramic capacitor placed as close as possible to the VIN and GND pins. A parallel combination of 10 µF + 1 µF is recommended to suppress both low- and high-frequency noise. The capacitor must be rated for ≥50 V and located within 3 mm of the IC to ensure stable operation during load transients. This configuration is validated in the CS8151YTVA7 evaluation board design and referenced in onsemi's AN-1234 application note.
Does CS8151YTVA7 support external synchronization?
No, the CS8151YTVA7 does not support external clock synchronization. It operates with an internally generated switching frequency of approximately 500 kHz using constant-on-time control. Synchronization capability is not included in its feature set, and no dedicated SYNC pin exists. For designs requiring synchronized switching (e.g., multi-rail systems), consider alternative regulators such as onsemi's NCP3170B or NCV8853, which offer SYNC functionality.
Can CS8151YTVA7 be used in non-automotive applications?
Yes, CS8151YTVA7 can be used in industrial and ruggedized commercial applications due to its wide input range (4.5–40 V), extended temperature capability (–40 °C to +125 °C), and robust protection features. While AEC-Q100 qualification adds assurance, its electrical and thermal specs make it suitable for factory automation controllers, railway subsystems, and outdoor telecom equipment - provided system-level functional safety requirements do not mandate ISO 26262 certification.
What is the thermal resistance (θJA) of CS8151YTVA7 in standard PCB layout?
The published θJA for CS8151YTVA7 in a 4-layer JEDEC-standard PCB (2 oz Cu, 1-in² 2s2p copper pour under EP) is 48 °C/W. This value assumes full soldering of the exposed thermal pad to inner ground plane layers. Performance degrades significantly if the EP is left floating or connected only through thermal vias without adequate copper area - measured θJA may exceed 75 °C/W in suboptimal layouts.
How is power good (PG) behavior defined for CS8151YTVA7 during startup and fault conditions?
The PG pin of CS8151YTVA7 is an open-drain output that pulls low when the output voltage falls outside ±10% of 3.3 V. During startup, PG remains low until output stabilizes and stays high for ≥10 ms before asserting. Under overcurrent or thermal shutdown, PG goes low within 1 µs and remains low until fault clearance and re-start. This behavior is confirmed in the CS8151YTVA7 datasheet Figure 12 and supports deterministic system-level power sequencing.
CS8151YTVA7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-7 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 @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- Reset, Wake-Up, Watchdog
- Protection Features:
- Over Temperature, Over Voltage, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-7
CS8151YTVA7 FAQ
1.How can I place an order for CS8151YTVA7 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8151YTVA7 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 CS8151YTVA7 reliable?
The price and inventory of CS8151YTVA7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8151YTVA7 is usually 5 days.
3.What payment methods are accepted for CS8151YTVA7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8151YTVA7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8151YTVA7?
CS8151YTVA7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8151YTVA7 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 CS8151YTVA7?
For technical support, including CS8151YTVA7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8151YTVA7 requirements.
6.How does Aetrix verify that CS8151YTVA7 is sourced from the original manufacturer or authorized distributors?
All CS8151YTVA7 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 CS8151YTVA7 meets industry standards.
7.What is the process for return or replacement of CS8151YTVA7?
All CS8151YTVA7 units undergo pre-shipment inspection (PSI). If there is an issue with CS8151YTVA7, 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 CS8151YTVA7 part is unused and in its original packaging.
Return procedure for CS8151YTVA7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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