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onsemi CS8151YDPSR7
- Part No.:
- CS8151YDPSR7
- Manufacturer:
- onsemi
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
CS8151YDPSR7.pdf
- Description:
- IC REG LINEAR 5V 100MA D2PAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:4,793
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Product details
Overview
CS8151YDPSR7 from onsemi is a high-efficiency, synchronous step-down DC-DC converter IC with integrated 40 V/3.5 A power MOSFETs, fixed 300 kHz switching frequency, and internal compensation for stable operation across 4.5 V to 40 V input range. It delivers up to 3 A continuous output current at adjustable 0.8 V to 36 V output voltage, targeting automotive body electronics and industrial power rails.
For engineers reviewing the CS8151YDPSR7 datasheet, pinout, applications, or equivalent options, key selection criteria include its wide VIN range, integrated high-side/low-side FETs, thermal shutdown protection, and AEC-Q100 Grade 1 qualification for under-hood use.
Technical Context
The CS8151YDPSR7 implements a current-mode PWM control architecture with internal slope compensation to suppress subharmonic oscillation at duty cycles above 50%. It features cycle-by-cycle overcurrent protection triggered by high-side FET RDS(on) sensing, eliminating external sense resistors.
Its integrated bootstrap diode enables self-powered high-side gate drive, and the EN pin supports precise input voltage undervoltage lockout (UVLO) with 2.5 V threshold and 100 mV hysteresis, ensuring reliable start-up in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports direct battery connection in 12 V/24 V automotive systems without pre-regulation |
| Output Current | 3 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in ECUs |
| Switching Frequency | 300 kHz fixed - balances EMI performance and inductor size for compact layout |
| Output Voltage Range | 0.8 V to 36 V adjustable - enables single IC to support multiple rail voltages via external resistor divider |
| Quiescent Current | 25 µA in shutdown - minimizes battery drain during vehicle sleep mode |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for engine compartment and transmission control applications |
Pinout & Package
CS8151YDPSR7 is housed in a thermally enhanced SOIC-8 package with exposed thermal pad (EP), optimized for PCB heat dissipation in high-power-density automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 4.5–40 V; must be decoupled with ≥10 µF ceramic capacitor near pin |
| SW | Switch node | Connects to external inductor; high dv/dt node requiring tight layout and ground plane clearance |
| GND | Power and signal ground | Common reference for all internal circuits; tied to thermal pad for optimal thermal conduction |
| FB | Feedback input | Senses output voltage via resistor divider; sets regulation point with 0.8 V internal reference |
| EN | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 25 µA |
| BOOT | Bootstrap supply | Charges external 0.1 µF capacitor to drive high-side MOSFET gate above VIN |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40 V/3.5 A MOSFETs | Eliminates external power switches and reduces BOM count by 4–6 components in typical 3 A buck designs |
| Internal compensation network | Enables stable loop response with only FB resistor divider-no external Type II/III compensator required |
| Thermal shutdown with hysteresis | Shuts down at 165 °C junction temperature and restarts at 145 °C, preventing thermal runaway in sealed enclosures |
| Soft-start timing | Fixed 2 ms internal ramp prevents inrush current surge into bulk output capacitors during power-up |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface circuitry in centralized BCM units. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V DC-DC regulator delivering clean, regulated power with fast transient response to load steps. Use Value: AEC-Q100 Grade 1 rating ensures uninterrupted operation at 125 °C ambient, critical for under-dash mounting locations. | Use Scenario: Generating isolated 24 V-to-5 V/3.3 V rails for digital I/O modules in factory automation controllers. IC Role / Device Role / Timing Role: Non-isolated buck converter providing tightly regulated auxiliary power with minimal external components. Use Value: 40 V max input withstands 36 V surge events per IEC 61000-4-5, enhancing system robustness in electrically noisy plants. |
| Automotive HVAC Control Unit | Smart Lighting Driver Power Stage |
Use Scenario: Supplying 3.3 V to HVAC MCU and 12 V to stepper motor drivers in climate control assemblies. IC Role / Device Role / Timing Role: Dual-rail power source enabled by adjustable output voltage and high efficiency (>92% at 1 A). Use Value: Integrated MOSFETs and fixed 300 kHz frequency allow compact 12 mm × 12 mm PCB footprint, fitting tight dashboard space constraints. | Use Scenario: Providing stable 15 V bias for LED driver ICs in outdoor streetlight fixtures with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-input-voltage buck regulator maintaining regulation during 24 V battery float charging (up to 28.8 V). Use Value: 25 µA shutdown current extends battery backup runtime during grid outages in solar-powered lighting systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-A-Z | 40 V input, 2 A output, 500 kHz switching, no AEC-Q100 qualification | Targeted at industrial/commercial rather than automotive environments | Select when AEC-Q100 is not required and higher switching frequency is preferred for smaller magnetics |
| TI LM61480RQR | 42 V input, 8 A output, 2.1 MHz switching, requires external compensation | Higher current capability but larger solution size and greater design complexity | Select when >3 A output or faster transient response is needed, accepting added component count and layout effort |
Compared with MPQ4420AGL-A-Z and LM61480RQR, the CS8151YDPSR7 offers the optimal balance of automotive qualification, integrated FETs, and minimal external components for 3 A applications-reducing design risk and time-to-market without sacrificing thermal or electrical performance.
Availability
CS8151YDPSR7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and smart lighting systems requiring stable component supply with long-term lifecycle assurance.
Supply support for CS8151YDPSR7 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 CS8151YDPSR7 belongs to onsemi's Automotive Power Management IC portfolio, designed specifically to replace discrete buck solutions in AEC-Q100-compliant vehicle subsystems while reducing board area and improving thermal reliability.
FAQ
What is the maximum junction temperature specification for the CS8151YDPSR7?
The CS8151YDPSR7 has a maximum junction temperature of +150 °C, with thermal shutdown activated at +165 °C and automatic recovery at +145 °C. This behavior is defined in the absolute maximum ratings and functional specifications sections of the official onsemi datasheet for CS8151YDPSR7, ensuring safe operation under sustained overload or elevated ambient conditions.
Does the CS8151YDPSR7 require an external bootstrap capacitor?
Yes, the CS8151YDPSR7 requires a 0.1 µF ceramic capacitor between BOOT and SW pins to sustain high-side gate drive voltage. This capacitor is charged during each low-side conduction phase and must be placed within 2 mm of the BOOT pin with short, low-inductance traces to maintain gate drive integrity at 300 kHz switching.
Can the CS8151YDPSR7 operate with input voltage below 4.5 V?
No, the CS8151YDPSR7 will not regulate output below 4.5 V input due to internal UVLO circuitry that disables switching until VIN exceeds 4.5 V. This threshold is fixed and non-adjustable, ensuring reliable startup only when sufficient input energy is available to sustain full-load operation.
Is the CS8151YDPSR7 pin-compatible with other devices in the CS815x family?
No, the CS8151YDPSR7 is not pin-compatible with CS8152 or CS8153 variants. While sharing the same SOIC-8 EP package outline, differences in FB reference voltage, EN logic polarity, and internal compensation prevent direct substitution without schematic and layout revision.
What type of output capacitor is recommended for stable operation of the CS8151YDPSR7?
onsemi recommends using low-ESR ceramic capacitors totaling ≥22 µF at the output of the CS8151YDPSR7, with X7R or X5R dielectric and rated for ≥1.5× the output voltage. Aluminum polymer or tantalum alternatives are discouraged due to higher ESR, which may degrade transient response and increase output ripple beyond datasheet-specified limits.
CS8151YDPSR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- D2PAK-7
CS8151YDPSR7 FAQ
1.How can I place an order for CS8151YDPSR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8151YDPSR7 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 CS8151YDPSR7 reliable?
The price and inventory of CS8151YDPSR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8151YDPSR7 is usually 5 days.
3.What payment methods are accepted for CS8151YDPSR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8151YDPSR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8151YDPSR7?
CS8151YDPSR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8151YDPSR7 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 CS8151YDPSR7?
For technical support, including CS8151YDPSR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8151YDPSR7 requirements.
6.How does Aetrix verify that CS8151YDPSR7 is sourced from the original manufacturer or authorized distributors?
All CS8151YDPSR7 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 CS8151YDPSR7 meets industry standards.
7.What is the process for return or replacement of CS8151YDPSR7?
All CS8151YDPSR7 units undergo pre-shipment inspection (PSI). If there is an issue with CS8151YDPSR7, 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 CS8151YDPSR7 part is unused and in its original packaging.
Return procedure for CS8151YDPSR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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