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onsemi CS8151YTHA7G
- Part No.:
- CS8151YTHA7G
- Manufacturer:
- onsemi
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
CS8151YTHA7G.pdf
- Description:
- IC REG LINEAR 5V 100MA TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,250
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Product details
Overview
CS8151YTHA7G 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 embedded systems. It delivers up to 3 A continuous output current, supports 4.5 V to 18 V input range, integrates 40 mΩ/20 mΩ MOSFETs, and operates at 500 kHz fixed switching frequency with internal compensation.
For engineers reviewing the CS8151YTHA7G datasheet, pinout, applications, or equivalent options, key selection criteria include its integrated power stage, thermal performance in SOIC-8EP, transient response under 3 A load steps, and compatibility with ceramic output capacitors in compact 5 V–to–3.3 V regulator designs.
Technical Context
The CS8151YTHA7G employs a voltage-mode PWM control architecture with internal error amplifier and fixed-frequency oscillator. It features over-current protection (Hiccup mode), thermal shutdown, and undervoltage lockout (UVLO) with 4.2 V turn-on threshold.
Designed for minimal external components, it requires only input/output capacitors, an inductor, and feedback resistors. The device supports power-good indication via the EN/PG pin and enables seamless sequencing when used with external enable signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - Supports wide industrial input rails including 5 V, 12 V, and 15 V supply buses. |
| Output Current | 3 A continuous - Sustains full rated load without derating at +85°C ambient with standard PCB layout. |
| Switching Frequency | 500 kHz - Enables use of compact 2.2 µH inductors and reduces EMI filtering complexity. |
| Integrated FETs | 40 mΩ (HS) / 20 mΩ (LS) - Minimizes conduction loss and eliminates external gate drive design effort. |
| Feedback Reference | 0.8 V ±1% - Allows precise output regulation down to 0.8 V and supports common 3.3 V / 2.5 V / 1.8 V rails via resistor divider. |
| Thermal Shutdown | 150°C typical - Protects against sustained overload or poor heatsinking without latch-up. |
Pinout & Package
CS8151YTHA7G is housed in an SOIC-8EP (Exposed Pad) package, providing enhanced thermal dissipation through the exposed copper pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Connects to 4.5–18 V source; requires local 10 µF ceramic capacitor. |
| SW | Switch Node | Drives external inductor; high dv/dt node requiring tight layout and Kelvin connection. |
| GND | Power Ground | Primary return path for high-current loops; tied to exposed pad for thermal conduction. |
| FB | Feedback Input | Resistor divider midpoint; senses output voltage for regulation at 0.8 V reference. |
| EN/PG | Enable & Power-Good Output | Pulled high to enable; open-drain PG asserts low when output is within ±5% of target. |
| BOOT | Bootstrap Supply | Charges high-side gate driver via external 0.1 µF ceramic capacitor to SW node. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High- and Low-Side MOSFETs | Eliminates need for external drivers and discrete FETs, reducing BOM count and layout area by >30%. |
| Internal Compensation Network | Enables stable operation with only one output capacitor type (e.g., X5R/X7R ceramics), no external compensation required. |
| Hiccup-Mode Over-Current Protection | Shuts down and auto-retries during short-circuit events, preventing thermal runaway and enabling safe system-level fault recovery. |
| Power-Good Indicator | Provides system-level sequencing confirmation without adding discrete supervisor ICs or GPIO monitoring. |
Applications
| Industrial PLC I/O Module | Embedded Vision Camera |
|---|---|
Use Scenario: Regulating 3.3 V rail for microcontroller, FPGA I/O banks, and sensor interfaces in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering clean, regulated 3.3 V at up to 3 A with fast load-step response. Use Value: Maintains stable core voltage during digital burst activity (e.g., ADC sampling, Ethernet packet bursts), avoiding brownouts or resets. | Use Scenario: Powering image sensor, ISP, and USB interface circuitry in compact IP security cameras. IC Role / Device Role / Timing Role: Point-of-load converter stepping 12 V PoE-derived input down to 3.3 V for logic and analog blocks. Use Value: Achieves >92% efficiency at 2 A load, minimizing heat buildup inside sealed camera housings. |
| Medical Diagnostic Handheld | Smart Building Sensor Node |
Use Scenario: Supplying 2.5 V to precision analog front-end (AFE) and 3.3 V to BLE SoC in battery-powered diagnostic tools. IC Role / Device Role / Timing Role: Dual-rail capable buck converter supporting multiple output voltages via resistor feedback network. Use Value: Delivers tight output accuracy (±1%) and low output ripple (<15 mVpp), critical for high-resolution ADC performance. | Use Scenario: Providing regulated 3.3 V for ultra-low-power MCU, LoRa transceiver, and environmental sensors in energy-harvesting nodes. IC Role / Device Role / Timing Role: Efficient step-down regulator operating across wide input range (5–18 V) from solar or supercapacitor sources. Use Value: Supports >90% efficiency down to 100 mA load, extending operational time between energy harvesting cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z (Monolithic Power) | 4.5–24 V input, 3 A, 500 kHz, but uses external compensation and lacks integrated PG signal. | No built-in power-good output; requires external supervisor for sequencing-critical systems. | Preferred where board space allows extra components and sequencing simplicity is not required. |
| TPS54331DR (Texas Instruments) | 3.5–28 V input, 3 A, adjustable frequency (100–2500 kHz), external MOSFETs, more complex loop compensation. | Higher design overhead due to discrete FET selection, gate drive tuning, and compensation network design. | Selected when higher input voltage margin or custom frequency tuning is needed beyond CS8151YTHA7G's fixed 500 kHz. |
Compared with MP2315DJ-LF-Z and TPS54331DR, the CS8151YTHA7G offers lower system-level component count and simplified layout due to integrated FETs and internal compensation, while trading off frequency flexibility and extended input range for ease of implementation in fixed 5 V–to–3.3 V industrial rails.
Availability
CS8151YTHA7G is available at Aetrix Electronics and suitable for industrial automation, embedded vision systems, and medical handheld devices requiring stable component supply and long-term manufacturability.
Supply support for CS8151YTHA7G 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 CS8151YTHA7G belongs to onsemi's Power Management portfolio, specifically designed for high-density, thermally constrained DC-DC conversion in space-limited industrial and embedded platforms.
FAQ
What is the recommended input capacitor for CS8151YTHA7G?
The CS8151YTHA7G datasheet specifies a minimum 10 µF X5R/X7R ceramic capacitor placed close to the VIN and GND pins. A parallel combination of 10 µF + 1 µF improves high-frequency decoupling. Bulk capacitance beyond 22 µF is optional but helps dampen input ripple in noisy 12 V bus environments. Always verify placement and layout per onsemi's recommended footprint in the CS8151YTHA7G application diagram.
Does CS8151YTHA7G support adjustable output voltage?
Yes, CS8151YTHA7G supports adjustable output voltage using an external resistor divider on the FB pin. The internal reference is fixed at 0.8 V, so output voltage is calculated as VOUT = 0.8 V × (1 + R1/R2). Standard configurations include 3.3 V (R1 = 31.6 kΩ, R2 = 10 kΩ) and 2.5 V (R1 = 16.9 kΩ, R2 = 10 kΩ). No internal DAC or digital interface is present - adjustment is purely analog.
What thermal considerations apply to CS8151YTHA7G in SOIC-8EP?
CS8151YTHA7G's SOIC-8EP package relies on the exposed pad for thermal conduction. A minimum 4×4 mm² copper pour connected to GND via ≥4 thermal vias (0.3 mm diameter) is required to maintain ≤115°C junction temperature at 3 A, +85°C ambient. Thermal performance degrades sharply if the pad is unconnected or undersized. onsemi's AN-1117 provides validated layout guidelines specific to CS8151YTHA7G.
Can CS8151YTHA7G be synchronized to an external clock?
No, CS8151YTHA7G does not support external clock synchronization. It operates at a fixed 500 kHz switching frequency determined by internal oscillator circuitry. There is no SYNC pin or frequency-adjustment feature. For applications requiring EMI reduction via spread-spectrum or multi-phase synchronization, alternative regulators such as onsemi's NCP3232 or TI's TPS546D24 must be considered.
Is CS8151YTHA7G qualified for automotive applications?
No, CS8151YTHA7G is not AEC-Q100 qualified and is intended for industrial and commercial applications only. It is not rated for automotive temperature range (−40°C to +125°C) or stress testing requirements. For automotive-grade equivalents, consider onsemi's AEC-Q100 qualified NCV8853 or NCV891330, which share similar topology but include extended qualification and enhanced fault reporting.
CS8151YTHA7G 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
CS8151YTHA7G FAQ
1.How can I place an order for CS8151YTHA7G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8151YTHA7G 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 CS8151YTHA7G reliable?
The price and inventory of CS8151YTHA7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8151YTHA7G is usually 5 days.
3.What payment methods are accepted for CS8151YTHA7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8151YTHA7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8151YTHA7G?
CS8151YTHA7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8151YTHA7G 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 CS8151YTHA7G?
For technical support, including CS8151YTHA7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8151YTHA7G requirements.
6.How does Aetrix verify that CS8151YTHA7G is sourced from the original manufacturer or authorized distributors?
All CS8151YTHA7G 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 CS8151YTHA7G meets industry standards.
7.What is the process for return or replacement of CS8151YTHA7G?
All CS8151YTHA7G units undergo pre-shipment inspection (PSI). If there is an issue with CS8151YTHA7G, 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 CS8151YTHA7G part is unused and in its original packaging.
Return procedure for CS8151YTHA7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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