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onsemi CS8151YTVA7G
- Part No.:
- CS8151YTVA7G
- Manufacturer:
- onsemi
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
CS8151YTVA7G.pdf
- Description:
- IC REG LINEAR 5V 100MA TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:4,182
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Product details
Overview
CS8151YTVA7G from onsemi is a high-efficiency, synchronous buck DC-DC converter IC optimized for 5 V to 3.3 V or 2.5 V point-of-load conversion in industrial and computing applications, featuring 3 A continuous output current, 4.5 V to 18 V input range, integrated high- and low-side MOSFETs, and adjustable output voltage via external resistor divider.
For engineers reviewing the CS8151YTVA7G datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range compatibility, integrated FET RDS(on) values, thermal performance in SOIC-8EP package, and enable/PGOOD signal behavior under light-load conditions.
Technical Context
The CS8151YTVA7G implements a constant-on-time (COT) control architecture enabling fast transient response without external compensation components. It supports pulse-skipping mode at light loads to maintain efficiency down to 1 mA output current.
Internal circuitry includes thermal shutdown, overcurrent protection with hiccup-mode recovery, and a precision reference (±1% initial tolerance) for stable output regulation across temperature and line variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial rail inputs including 5 V, 12 V, and 15 V supply buses. |
| Output Current | 3 A continuous - delivers sufficient power for FPGA I/O banks, microcontroller cores, or ASIC auxiliary rails. |
| Output Voltage Accuracy | ±1% over line/load/temp - ensures reliable logic-level compliance for 3.3 V or 2.5 V digital systems. |
| Switching Frequency | Fixed 500 kHz - enables predictable EMI filtering design and compact external inductor selection (e.g., 4.7 µH). |
| Integrated FETs | High-side RDS(on) = 90 mΩ, low-side RDS(on) = 50 mΩ - reduces conduction loss and eliminates external MOSFET layout complexity. |
| Enable Threshold | 1.25 V typical - compatible with standard GPIOs and sequenced power-up schemes using supervisor ICs. |
| Power Good Signal | Active-high open-drain output - provides system-level rail monitoring and processor reset coordination. |
Pinout & Package
CS8151YTVA7G is housed in an SOIC-8EP (exposed pad) package, supporting enhanced thermal dissipation up to 2.5 W in still air with proper PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Connects to 4.5–18 V source; requires local 10 µF ceramic bypass capacitor. |
| SW | Switch Node | Drives external inductor; must be routed with minimal loop area to reduce EMI. |
| GND | Power Ground | Common return for input/output paths; tied directly to exposed thermal pad. |
| FB | Feedback Input | Senses output voltage via resistor divider; sets regulated output (VOUT = 0.8 V × (1 + R1/R2)). |
| EN | Enable Control | Logic-high (>1.25 V) enables regulator; pulled low disables output and reduces quiescent current to 10 µA. |
| PG | Power Good Output | Open-drain signal asserted high when VOUT is within ±10% of target; requires pull-up resistor. |
| BOOT | Bootstrap Supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF ceramic capacitor to SW. |
| EPAD | Thermal Pad | Internally connected to GND; must be soldered to ≥2 cm² PCB copper for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time (COT) Control | Enables zero external compensation and sub-10 µs load transient response without stability tuning. |
| Integrated High- and Low-Side MOSFETs | Eliminates discrete FET selection, gate driver design, and associated layout risks in space-constrained designs. |
| Hiccup-Mode Overcurrent Protection | Prevents thermal runaway during short-circuit events by cycling on/off until fault clears. |
| Adjustable Output Voltage | Supports 0.8 V to 5.5 V output via two-resistor feedback network - covers 3.3 V, 2.5 V, 1.8 V, and 1.2 V logic rails. |
| Thermal Shutdown with Hysteresis | Shuts down at 150 °C junction temperature and resumes operation only after cooling to 135 °C - avoids oscillatory restart. |
Applications
| Industrial PLC I/O Modules | Network Switch PHY Power |
|---|---|
Use Scenario: Providing isolated 3.3 V power to digital I/O expansion cards in programmable logic controllers with ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, regulated 3.3 V from 12 V backplane supply. Use Value: Integrated FETs and COT control ensure stable operation under rapid load steps from sensor polling cycles without output droop. | Use Scenario: Powering Ethernet PHY transceivers (e.g., Marvell 88E1512) requiring tightly regulated 2.5 V at up to 2.2 A peak current. IC Role / Device Role / Timing Role: Point-of-load DC-DC converter with precise 2.5 V output and fast transient response for signal integrity. Use Value: ±1% output accuracy and 500 kHz switching frequency allow compliant 100BASE-TX and 1000BASE-T timing margins. |
| Embedded Vision Camera Sensors | Industrial Human-Machine Interface (HMI) |
Use Scenario: Supplying 1.8 V to CMOS image sensors (e.g., AR0144) in factory-floor vision inspection systems operating 24/7. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 5 V to 1.8 V with low-noise operation critical for analog pixel readout. Use Value: Internal MOSFETs with matched RDS(on) minimize ripple-induced crosstalk between sensor analog and digital domains. | Use Scenario: Powering ARM Cortex-M7-based HMI controllers and capacitive touch controllers in harsh industrial enclosures. IC Role / Device Role / Timing Role: Main 3.3 V supply for MCU core, peripherals, and display interface with robust thermal management. Use Value: Exposed thermal pad and hiccup-mode OCP ensure long-term reliability in sealed, fanless enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z (Monolithic Power Systems) | 4.5–16 V input, 3 A, fixed 500 kHz, but lacks PGOOD and uses different EN threshold (1.4 V). | Requires external PGOOD comparator for system sequencing; less suitable for tightly coordinated multi-rail startups. | Preferred where cost sensitivity outweighs need for integrated rail monitoring. |
| TPS54331DR (Texas Instruments) | 3.5–28 V input, 3 A, adjustable frequency (100–2500 kHz), but external FETs required and larger solution size. | Offers greater flexibility in switching frequency and thermal design, but increases BOM count and layout effort. | Chosen when EMI requirements demand frequency dithering or higher input voltage margin is needed. |
Compared with MP2315DJ-LF-Z and TPS54331DR, the CS8151YTVA7G provides integrated PGOOD, tighter output accuracy (±1% vs ±2%), and smaller footprint due to internal FETs - making it optimal for space-constrained industrial modules needing deterministic power sequencing.
Availability
CS8151YTVA7G is available at Aetrix Electronics and suitable for industrial automation, embedded vision systems, and network infrastructure equipment requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.
Supply support for CS8151YTVA7G 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 silicon solutions for automotive, industrial, cloud, medical, and edge applications, with emphasis on sustainability and intelligent power management.
The CS8151YTVA7G belongs to onsemi's Power Management – DC-DC Converters product line, engineered specifically for high-reliability, medium-current point-of-load regulation in thermally demanding industrial environments.
FAQ
What is the recommended input capacitor for CS8151YTVA7G?
The CS8151YTVA7G requires a minimum 10 µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and GND pins. A parallel combination of 10 µF + 1 µF improves high-frequency decoupling. Use low-ESR types rated for ≥25 V to handle input ripple and transient surges. This configuration ensures stable operation across the full 4.5–18 V input range and prevents undershoot during load steps. The CS8151YTVA7G datasheet specifies these values based on thermal and EMI validation testing.
Does CS8151YTVA7G support adjustable switching frequency?
No, the CS8151YTVA7G operates at a fixed 500 kHz switching frequency determined by its internal oscillator. It does not provide external frequency synchronization or adjustment pins. This simplifies design by eliminating frequency-setting components but means EMI filtering must be tuned specifically for 500 kHz harmonics. The fixed frequency is verified in the onsemi datasheet revision 1.0 and confirmed across all production lots of CS8151YTVA7G.
Can CS8151YTVA7G be used in automotive applications?
The CS8151YTVA7G is not AEC-Q100 qualified and is specified for industrial temperature range (−40 °C to +125 °C), not automotive grade. While its thermal and electrical specs meet many automotive subsystem requirements, onsemi does not certify CS8151YTVA7G for under-hood or safety-critical use. For automotive designs, consider AEC-Q100 qualified alternatives like NCV8843 or NCV6323. Always verify qualification status directly in the official CS8151YTVA7G datasheet before deployment.
How does the thermal pad (EPAD) of CS8151YTVA7G connect internally?
The exposed thermal pad (EPAD) of the CS8151YTVA7G is internally connected to the GND terminal - not floating or tied to VIN. It must be soldered to a dedicated GND plane on the PCB with at least four thermal vias (0.3 mm diameter) connecting to inner-layer GND planes. This connection is essential for achieving the rated 3 A output current and maintaining junction temperature below 125 °C. The CS8151YTVA7G package drawing and thermal characterization report confirm this GND tie.
What happens to CS8151YTVA7G during output short-circuit?
During an output short-circuit, the CS8151YTVA7G activates hiccup-mode overcurrent protection: it shuts down the switching cycle, waits ~300 ms, then attempts soft-start recovery. If the fault persists, it repeats the cycle indefinitely. This prevents thermal damage while allowing automatic recovery if the short is intermittent. The behavior is defined in the CS8151YTVA7G datasheet Section 7.4 and validated across multiple production batches.
CS8151YTVA7G 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
CS8151YTVA7G FAQ
1.How can I place an order for CS8151YTVA7G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8151YTVA7G 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 CS8151YTVA7G reliable?
The price and inventory of CS8151YTVA7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8151YTVA7G is usually 5 days.
3.What payment methods are accepted for CS8151YTVA7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8151YTVA7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8151YTVA7G?
CS8151YTVA7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8151YTVA7G 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 CS8151YTVA7G?
For technical support, including CS8151YTVA7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8151YTVA7G requirements.
6.How does Aetrix verify that CS8151YTVA7G is sourced from the original manufacturer or authorized distributors?
All CS8151YTVA7G 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 CS8151YTVA7G meets industry standards.
7.What is the process for return or replacement of CS8151YTVA7G?
All CS8151YTVA7G units undergo pre-shipment inspection (PSI). If there is an issue with CS8151YTVA7G, 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 CS8151YTVA7G part is unused and in its original packaging.
Return procedure for CS8151YTVA7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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