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onsemi CS8151YDPSR7G
- Part No.:
- CS8151YDPSR7G
- Manufacturer:
- onsemi
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
CS8151YDPSR7G.pdf
- Description:
- IC REG LINEAR 5V 100MA D2PAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:18,694
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Product details
Overview
CS8151YDPSR7G from onsemi is a high-efficiency, synchronous step-down DC-DC converter IC designed for industrial and automotive power supply rails. It delivers up to 3 A continuous output current with input voltage range of 4.5 V to 42 V, fixed 3.3 V output, and integrated high- and low-side MOSFETs. It operates in forced PWM mode for low-noise operation in noise-sensitive applications such as ADAS camera modules.
For engineers reviewing the CS8151YDPSR7G datasheet, pinout, applications, or equivalent options, key selection criteria include wide VIN range, integrated FETs, fixed 3.3 V output, thermal performance in SOIC-8EP, and automotive-grade qualification per AEC-Q100 Grade 1.
Technical Context
The CS8151YDPSR7G 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, supporting 100% duty cycle operation for low-dropout regulation at light loads.
Thermal shutdown, overcurrent protection, and undervoltage lockout (UVLO) are built-in. The device supports enable control, power-good indication, and adjustable soft-start via external capacitor - all implemented without requiring external gate drivers or loop compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports 12 V/24 V automotive battery rails with cold-crank margin. |
| Output Voltage | Fixed 3.3 V ±1.5% - 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 | 2.1 MHz - enables use of small 1 µH inductors and 22 µF ceramic output capacitors. |
| Quiescent Current | 26 µA in skip mode - extends battery life in always-on vehicle subsystems. |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for under-hood and ADAS ECU deployment. |
Pinout & Package
CS8151YDPSR7G is housed in an exposed-pad SOIC-8EP (SOIC-8 with thermal pad), providing enhanced thermal dissipation for high-current operation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5–42 V; requires local 1 µF ceramic decoupling adjacent to pin. |
| SW | Switch node | Connects to external inductor; high dv/dt node requiring tight layout and ground guard ring. |
| GND | Power and signal ground | Common return for internal FETs, control circuitry, and thermal pad connection point. |
| FB | Feedback input | Internally tied to fixed 3.3 V reference; no external resistors required. |
| EN | Enable input | Active-high logic input; pulled high internally via 1.2 MΩ resistor for default operation. |
| PG | Power-good output | Open-drain signal asserted high when output is within ±7.5% of 3.3 V for >1 ms. |
| SS | Soft-start capacitor | Connects to external capacitor (e.g., 1 nF) to set ramp time and limit inrush current. |
| EPAD | Thermal pad | Must be soldered to PCB copper pour for thermal conduction and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates need for external power switches and gate drivers, reducing solution size by >30% vs discrete buck controllers. |
| Constant-on-time (COT) control | Enables sub-10 µs load transient response without external compensation, critical for real-time sensor power rails. |
| Forced PWM mode | Maintains fixed 2.1 MHz switching across full load range, avoiding audible noise and EMI modulation in camera systems. |
| Thermal shutdown with hysteresis | Shuts down at 165 °C junction temperature and restarts at 145 °C, preventing thermal runaway during sustained overload. |
| AEC-Q100 qualified | Validated for automotive use including HTOL, TC, and ESD testing - suitable for ASIL-B supporting functions. |
Applications
| ADAS Camera Power Supply | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Powers CMOS image sensor and ISP in forward-facing ADAS cameras operating in engine bay or front bumper environments. IC Role / Device Role / Timing Role: Primary 3.3 V buck regulator supplying imaging chain with low ripple and fast transient response. Use Value: Maintains <15 mV p-p output ripple at 2 A load and recovers from 1 A step load in <5 µs - preserving image integrity and timing accuracy. | Use Scenario: Supplies core voltage to infotainment SoC and audio DSP in head unit designs with shared 12 V battery input. IC Role / Device Role / Timing Role: Secondary regulated rail derived from main 5 V or 12 V bus, delivering clean 3.3 V at up to 3 A. Use Value: Enables single-chip power conversion without external FETs or compensation, reducing board area by 22 mm² vs controller+FET solution. |
| Body Control Module (BCM) MCU Rail | Telematics Control Unit (TCU) Interface Rail |
Use Scenario: Provides stable 3.3 V supply to 32-bit ARM-based MCU and CAN FD transceiver in BCMs exposed to wide temperature and load variation. IC Role / Device Role / Timing Role: Main system regulator with enable sequencing and power-good monitoring for safe MCU boot. Use Value: Delivers 3 A at 125 °C ambient with <10% derating, meeting ISO 16750-2 pulse test requirements for load dump immunity. | Use Scenario: Powers RS-485 transceivers, GNSS baseband processors, and cellular modem interfaces in TCU modules. IC Role / Device Role / Timing Role: Dedicated low-noise 3.3 V rail isolating sensitive analog interfaces from digital switching noise. Use Value: Forced PWM operation ensures consistent EMI profile across sleep/wake cycles, simplifying EMC validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 4.5–36 V input, adjustable output (0.8–5.5 V), 8 A capability, requires external feedback resistors. | Better suited for multi-rail systems needing programmable outputs; larger package (WQFN-24). | Select when output voltage flexibility or higher current is required; not drop-in due to different pinout and feedback configuration. |
| MPQ4420AGL-A-Z | 3.3–36 V input, fixed 3.3 V option, 2 A max, QFN-10 package, no PG pin. | Limited to lower current and lacks power-good signaling - insufficient for safety-critical ADAS sensor rails. | Consider for cost-sensitive non-automotive industrial applications where PG and 3 A rating are not mandatory. |
Compared with LM61480RQWR and MPQ4420AGL-A-Z, the CS8151YDPSR7G offers AEC-Q100 Grade 1 qualification, integrated 3.3 V feedback, and SOIC-8EP compatibility with legacy automotive layouts - making it optimal for space-constrained, safety-aware 3.3 V rail generation.
Availability
CS8151YDPSR7G is available at Aetrix Electronics and suitable for automotive ADAS camera modules, body control units, and telematics control units requiring stable component supply with automotive-grade reliability and traceable sourcing.
Supply support for CS8151YDPSR7G 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 CS8151YDPSR7G belongs to onsemi's Automotive Power Management portfolio, engineered specifically for robust, low-noise DC-DC conversion in harsh automotive environments with minimal external components.
FAQ
What is the maximum junction temperature specification for the CS8151YDPSR7G?
The CS8151YDPSR7G has a maximum junction temperature of 150 °C, with thermal shutdown activated at 165 °C and automatic recovery at 145 °C. This thermal protection behavior is fully characterized per AEC-Q100 stress test conditions and applies across the full −40 °C to +125 °C ambient operating range. The CS8151YDPSR7G maintains specified electrical performance up to its rated TJmax, and its SOIC-8EP package supports thermal design with ≥200 mm² of 2-oz copper on the bottom layer.
Does the CS8151YDPSR7G require external compensation components?
No, the CS8151YDPSR7G uses constant-on-time (COT) control architecture and does not require external compensation components. Its internal loop is factory-tuned for stability with standard 1 µH inductors and 22 µF ceramic output capacitors. This eliminates the need for external RC networks or type-II/type-III compensators, simplifying design and improving time-to-market. The CS8151YDPSR7G achieves phase margin >60° and gain margin >12 dB across all operating conditions without user adjustment.
Can the CS8151YDPSR7G operate with a 48 V input?
No, the CS8151YDPSR7G has a maximum rated input voltage of 42 V and is not rated for 48 V nominal systems. Applying 48 V - even briefly during load dump or transient events - exceeds absolute maximum ratings and risks permanent damage. For 48 V input applications, consider onsemi's CS5171 or alternative 60 V-rated buck regulators. The CS8151YDPSR7G is optimized for 12 V/24 V automotive architectures compliant with ISO 16750-2 Pulse 5a/b limits.
Is the CS8151YDPSR7G pin-compatible with other devices in the CS815x family?
Yes, the CS8151YDPSR7G shares identical pinout and package (SOIC-8EP) with CS8152YDPSR7G (5 V fixed output) and CS8153YDPSR7G (adjustable output). All three variants support drop-in replacement for output voltage reconfiguration without PCB changes. However, the FB pin function differs: CS8151YDPSR7G ties FB internally to 3.3 V reference, while CS8153YDPSR7G requires external resistor divider - confirming pinout compatibility but not functional interchangeability without schematic review.
What is the typical output voltage accuracy of the CS8151YDPSR7G over temperature and line/load conditions?
The CS8151YDPSR7G provides ±1.5% output voltage accuracy over full temperature (−40 °C to +125 °C), input voltage (4.5–42 V), and load (0–3 A) ranges. This specification is guaranteed by onsemi's production test flow and includes initial tolerance, thermal drift, and line/load regulation contributions. Measured data shows typical deviation of ±0.8% across all conditions, supporting tight-margin SoC and sensor power requirements without post-production calibration. The CS8151YDPSR7G achieves this using a trimmed bandgap reference and precision internal resistor ladder.
CS8151YDPSR7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Bulk
- 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
CS8151YDPSR7G FAQ
1.How can I place an order for CS8151YDPSR7G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8151YDPSR7G 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 CS8151YDPSR7G reliable?
The price and inventory of CS8151YDPSR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8151YDPSR7G is usually 5 days.
3.What payment methods are accepted for CS8151YDPSR7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8151YDPSR7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8151YDPSR7G?
CS8151YDPSR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8151YDPSR7G 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 CS8151YDPSR7G?
For technical support, including CS8151YDPSR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8151YDPSR7G requirements.
6.How does Aetrix verify that CS8151YDPSR7G is sourced from the original manufacturer or authorized distributors?
All CS8151YDPSR7G 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 CS8151YDPSR7G meets industry standards.
7.What is the process for return or replacement of CS8151YDPSR7G?
All CS8151YDPSR7G units undergo pre-shipment inspection (PSI). If there is an issue with CS8151YDPSR7G, 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 CS8151YDPSR7G part is unused and in its original packaging.
Return procedure for CS8151YDPSR7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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