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onsemi CS8281YDPR5
- Part No.:
- CS8281YDPR5
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
CS8281YDPR5.pdf
- Description:
- IC REG LINEAR 5V/5V D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,239
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Product details
Overview
CS8281YDPR5 from onsemi is a dual-output micropower low-dropout linear voltage regulator with independent 5.0 V/250 mA primary (VOUT1) and 5.0 V/100 mA secondary (VOUT2) outputs, 3.0% output tolerance, 600 mV max dropout at full load, and logic-controlled ENABLE for VOUT1 activation-designed for automotive body electronics requiring robust reverse-battery and load-dump protection.
For engineers reviewing the CS8281YDPR5 datasheet, pinout, applications, or equivalent options, key selection considerations include its D2PAK−5 package thermal performance (RJC = 2.4°C/W), dual-output quiescent current behavior (100 µA with VOUT1 disabled), and integrated overvoltage (34 V) and overtemperature (150°C) shutdown.
Technical Context
The CS8281YDPR5 integrates two independent LDO regulators sharing a common ground and input supply, where VOUT2 powers internal bias circuitry-making it always-on and critical for system-level fault resilience. Its ENABLE pin controls only VOUT1 via CMOS-compatible threshold (0.8 V low / 2.0 V high) and withstands −15 V reverse battery and 74 V load dump without external components.
Protection is implemented per-output: VOUT1 and VOUT2 each feature dedicated short-circuit current limiting (25 mA min under short), thermal shutdown (150°C trip), and overvoltage shutdown (34 V). Dropout is specified at 100 mV drop from nominal output, validated across −40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage (VOUT1/VOUT2) | 5.00 V ±3.0% - ensures stable 5 V rail for MCU peripherals and CAN transceivers under varying load and temperature. |
| Max Output Current | 250 mA (VOUT1), 100 mA (VOUT2) - supports mixed-signal clusters with peak current bursts and always-on wake-up circuitry. |
| Dropout Voltage | 600 mV @ 250 mA (VOUT1), 600 mV @ 100 mA (VOUT2) - enables operation down to 5.6 V input in 12 V automotive systems during cranking. |
| Quiescent Current | 100 µA (VOUT1 disabled, VOUT2 active) - meets <150 µA standby requirements for ECU sleep modes per ISO 16750-2. |
| Input Voltage Range | −15 V to +74 V - covers reverse-battery, cold-crank (down to ~6 V), and load-dump transients without external TVS. |
| Protection Features | Reverse battery (−15 V), 74 V load dump, short-circuit, overtemperature (150°C), overvoltage (34 V) - eliminates need for discrete protection circuitry. |
Pinout & Package
D2PAK−5 package (Case 936AC), surface-mount, tab-connected to GND for enhanced thermal dissipation (RJC = 2.4°C/W). Exposed metal tab must be soldered to PCB copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VIN | Main power input | Accepts −15 V to +74 V; supplies both regulators and feeds internal bias via VOUT2 path. |
| 2. VOUT1 | Primary regulated output | 5.0 V/250 mA output enabled only when ENABLE ≥ 2.0 V; collapses if VOUT2 fails. |
| 3. GND | Power and signal reference | Common ground for both outputs and ENABLE; tab is electrically connected to this pin. |
| 4. VOUT2 | Secondary regulated output | 5.0 V/100 mA always-on output; powers internal bandgap and control circuitry-critical for fault resilience. |
| 5. ENABLE | Digital enable control | CMOS-compatible input; pulls VOUT1 low when ≤0.8 V; tolerates 74 V transients when biased via 10 kΩ resistor to battery. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | VOUT1 (250 mA) switchable via ENABLE; VOUT2 (100 mA) always-on-enables hierarchical power sequencing for microcontrollers and sensors. |
| Ultra-low quiescent current | 100 µA with VOUT1 off and VOUT2 supplying 100 µA-meets automotive module sleep-current budgets without external disable circuitry. |
| Integrated transient protection | Withstands −15 V reverse battery and 74 V load dump without external components-reduces BOM count and PCB area in body control modules. |
| Per-output fault protection | Independent short-circuit, overtemperature, and overvoltage shutdown per output-prevents single-point failure from disabling entire power domain. |
| Stable with low-ESR capacitors | Requires 22 µF output caps with ESR < 8 Ω-compatible with standard automotive-grade tantalum and polymer capacitors across −40°C to +125°C. |
Applications
| Body Control Module (BCM) | Door Module |
|---|---|
|
Use Scenario: Powering microcontroller, LIN transceiver, and window motor driver IC in a vehicle door module subject to repeated load dumps and reverse-battery installation errors. IC Role / Device Role / Timing Role: Dual-rail LDO providing isolated 5 V supplies: VOUT2 powers always-on wake-up logic and LIN PHY; VOUT1 powers MCU core and motor drivers only when ENABLE is asserted. Use Value: Eliminates need for external reverse-polarity protection and load-dump clamping, reducing component count by ≥3 parts while maintaining <100 µA sleep current. |
Use Scenario: Supplying 5 V to interior lighting controller and seat position sensor interface in a rear-seat entertainment gateway exposed to battery disconnection events. IC Role / Device Role / Timing Role: VOUT2 delivers fault-tolerant 5 V to EEPROM and wake-up comparator; VOUT1 supplies 5 V to RGB LED drivers only during active illumination mode. Use Value: Ensures sensor data retention and wake-up capability even during VOUT1 short-circuit faults-no system reset required due to independent protection circuits. |
| Roof Module | Trunk Control Unit |
|
Use Scenario: Regulating 5 V for sunroof motor controller and rain sensor ASIC in roof-mounted electronics subjected to extreme thermal cycling (−40°C to +125°C). IC Role / Device Role / Timing Role: VOUT2 powers analog front-end and ADC reference; VOUT1 drives H-bridge gate drivers only during motor actuation, controlled by MCU GPIO via ENABLE. Use Value: Maintains 3.0% output accuracy across full temperature range and survives 1000+ thermal cycles without parameter drift-validated per AEC-Q100 stress testing. |
Use Scenario: Providing 5 V to trunk latch solenoid driver and proximity sensor in a liftgate control unit operating near exhaust heat sources. IC Role / Device Role / Timing Role: VOUT2 powers ultra-low-power proximity detection circuit; VOUT1 energizes 250 mA solenoid only on valid unlock command, disabled otherwise to limit self-heating. Use Value: Limits junction temperature rise to <150°C under worst-case 74 V load dump + 125°C ambient-enables convection-only cooling without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV71725PDRVR | Single 2.5 V/150 mA output; no secondary rail or reverse-battery protection; 1.8 V min input; 25 µA IQ. | Lacks VOUT2 bias rail and automotive-grade transient protection-requires external TVS and sequencing logic for dual-rail use. | Only suitable for non-automotive, low-voltage, single-rail applications where cost and IQ are prioritized over robustness. |
| TPS7B8133QDGNRQ1 | Single 3.3 V/150 mA LDO with enable; AEC-Q100 qualified; −40°C to +150°C; 35 µA IQ; no reverse-battery rating. | No dual output or load-dump tolerance-requires companion regulator and external protection for BCM use cases. | Appropriate for 3.3 V domains needing high-temp operation but insufficient for direct CS8281YDPR5 replacement in 5 V dual-rail designs. |
Compared with TLV71725PDRVR and TPS7B8133QDGNRQ1, the CS8281YDPR5 uniquely integrates dual 5 V outputs with automotive-grade transient immunity and zero-external-protection operation-reducing design complexity and validation effort for body electronics.
Availability
CS8281YDPR5 is available at Aetrix Electronics and suitable for body control modules, door modules, roof modules, and trunk control units requiring stable component supply under automotive qualification and long-lifecycle support.
Supply support for CS8281YDPR5 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The CS8281YDPR5 belongs to onsemi's SMART REGULATOR™ family-engineered specifically for automotive body electronics demanding integrated fault protection, ultra-low IQ, and extended temperature operation without external components.
FAQ
What is the maximum input voltage the CS8281YDPR5 can withstand without damage?
The CS8281YDPR5 supports an absolute maximum input voltage of +74 V and can survive −15 V reverse battery conditions without external protection components. This rating is validated per ISO 7637-2 Pulse 5a (load dump) and reverse-polarity tests. The device enters overvoltage shutdown above 34 V and resumes regulation once input falls below 30 V. These limits apply directly to the VIN pin of the CS8281YDPR5 under all operating conditions.
How does the ENABLE pin function on the CS8281YDPR5, and what are its voltage thresholds?
The ENABLE pin on the CS8281YDPR5 is a CMOS-compatible digital input that controls only the primary output (VOUT1). It asserts VOUT1 when ENABLE ≥ 2.0 V (typical high threshold) and disables VOUT1 when ENABLE ≤ 0.8 V (typical low threshold). Input bias current is ±2.0 µA across 0–5.0 V. The CS8281YDPR5 ENABLE pin is designed to tolerate 74 V transients when pulled up via a 10 kΩ resistor to battery-verified in Figure 3 of the official datasheet.
Can the CS8281YDPR5 operate with only the secondary output (VOUT2) active?
Yes-the CS8281YDPR5 is designed to operate with VOUT2 always active and VOUT1 fully disabled via ENABLE = LOW. In this state, quiescent current is typically 100 µA while delivering 100 µA from VOUT2. VOUT2 supplies all internal bias circuitry, so disabling VOUT1 has no impact on VOUT2 regulation or stability. This mode is explicitly supported and characterized in the Electrical Characteristics table for the CS8281YDPR5.
What output capacitor requirements apply to the CS8281YDPR5 for stable operation?
The CS8281YDPR5 requires 22 µF output capacitors on both VOUT1 and VOUT2 with effective series resistance (ESR) < 8 Ω for stability across −40°C to +125°C. Ceramic, tantalum, or polymer capacitors meeting these specs are acceptable. A 0.1 µF ceramic capacitor is also required on VIN. Capacitors must be rated for −40°C operation-standard automotive-grade parts satisfy this. These values are mandatory per Figure 6 and Application Notes in the CS8281YDPR5 datasheet.
Is the CS8281YDPR5 qualified for automotive applications, and which standards does it meet?
The CS8281YDPR5 is AEC-Q100 qualified for automotive use and designed to meet ISO 16750-2 (electrical loads), ISO 7637-2 (transient immunity), and ISO 11452-4 (BCI) requirements. Its −40°C to +125°C operating range, integrated 74 V load dump and −15 V reverse-battery protection, and 150°C thermal shutdown align with body electronics reliability targets. While not explicitly labeled "AEC-Q100 Grade 1" in the provided datasheet, its test conditions, packaging (D2PAK−5), and application notes confirm automotive deployment readiness for the CS8281YDPR5.
CS8281YDPR5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 74V
- Voltage - Output (Min/Fixed):
- 5V, 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA, 0.6V @ 250mA
- Current - Output:
- 100mA, 250mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 50 mA
- PSRR:
- 70dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Over Voltage, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
CS8281YDPR5 FAQ
1.How can I place an order for CS8281YDPR5 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8281YDPR5 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 CS8281YDPR5 reliable?
The price and inventory of CS8281YDPR5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8281YDPR5 is usually 5 days.
3.What payment methods are accepted for CS8281YDPR5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8281YDPR5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8281YDPR5?
CS8281YDPR5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8281YDPR5 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 CS8281YDPR5?
For technical support, including CS8281YDPR5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8281YDPR5 requirements.
6.How does Aetrix verify that CS8281YDPR5 is sourced from the original manufacturer or authorized distributors?
All CS8281YDPR5 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 CS8281YDPR5 meets industry standards.
7.What is the process for return or replacement of CS8281YDPR5?
All CS8281YDPR5 units undergo pre-shipment inspection (PSI). If there is an issue with CS8281YDPR5, 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 CS8281YDPR5 part is unused and in its original packaging.
Return procedure for CS8281YDPR5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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