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onsemi CS5203A-2GDPR3
- Part No.:
- CS5203A-2GDPR3
- Manufacturer:
- onsemi
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
CS5203A-2GDPR3.pdf
- Description:
- IC REG LINEAR 1.5V 3A D2PAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,284
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Product details
Overview
CS5203A-2GDPR3 from onsemi is a 3.0 A fixed-output linear regulator delivering 1.5 V with ±2.0% output accuracy, 1.05 V dropout at full load, and integrated thermal shutdown, overcurrent, and safe operating area (SOA) protection. It serves as a post-regulator or microprocessor supply in industrial power rails requiring stable low-voltage operation and fast transient response.
For engineers reviewing the CS5203A-2GDPR3 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.5 V output tolerance, D2PAK-3 surface-mount package compatibility, SOA protection behavior under high VIN–VOUT differentials, and quiescent current ≤10 mA at full load.
Technical Context
The CS5203A-2GDPR3 implements a composite PNP-NPN pass transistor architecture optimized for low dropout and fast loop response. Its SOA protection dynamically reduces maximum output current as input-output differential voltage increases-preventing thermal runaway during high-VIN conditions.
It requires an external output capacitor (e.g., 22 µF tantalum) for stability and transient performance, with ESR-dependent loop compensation. The device lacks remote sensing but supports Kelvin-style output connections to minimize conductor parasitic effects on load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2.0% - ensures stable core logic or I/O rail compliance across temperature and load. |
| Max Output Current | 3.0 A continuous - supports high-current FPGA I/O banks or ASIC auxiliary supplies. |
| Dropout Voltage | 1.05 V @ 3.0 A - enables operation from 2.55 V input, critical for low-voltage system partitioning. |
| Quiescent Current | ≤10 mA at full load - minimizes no-load power loss in always-on subsystems. |
| Thermal Shutdown | 150 °C activation with 25 °C hysteresis - prevents permanent junction damage during sustained overload. |
| Ripple Rejection | 78 dB @ 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the regulator. |
| Load Regulation | 0.4% max (10 mA to 3.0 A) - maintains tight voltage control across dynamic processor load states. |
Pinout & Package
D2PAK-3 surface-mount package (Case 418AB), thermally enhanced with tab connected to VOUT. Requires heatsinking for >1.5 A continuous operation in ambient >50 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal error amplifier and protection circuitry; must be low-impedance path to system ground plane. |
| 2 | VOUT | Regulated 1.5 V output; tab is electrically connected to this pin-requires isolation if mounting to heatsink. |
| 3 | VIN | Input supply (up to 17 V); must be decoupled with ≥10 µF capacitor near pin to ensure stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Safe Operating Area (SOA) Protection | Reduces max output current as VIN–VOUT rises-enables robust operation across wide input ranges without external foldback circuitry. |
| Low Dropout Voltage | 1.05 V @ 3.0 A-supports 1.5 V rail generation from 2.55 V intermediate bus, reducing need for cascaded regulators. |
| Fast Transient Response | Stable with 22 µF tantalum output cap-handles rapid load steps typical in microprocessor core/I/O domains without excessive undershoot. |
| Integrated Fault Protection | Thermal shutdown + overcurrent + SOA-eliminates need for discrete current-sense or thermal monitoring ICs in space-constrained designs. |
| Pb-Free Packaging | D2PAK-3 (DP suffix) complies with RoHS Directive 2011/65/EU-meets environmental requirements for industrial and telecom equipment. |
Applications
| Industrial PLC I/O Modules | FPGA Configuration & Auxiliary Rails |
|---|---|
|
Use Scenario: Powering 1.5 V I/O banks in programmable logic controller modules exposed to wide ambient temperatures (−40 °C to +70 °C). IC Role / Device Role / Timing Role: Primary 1.5 V post-regulator supplying FPGA I/O banks and isolated communication interfaces (RS-485, CAN transceivers). Use Value: SOA protection prevents latch-up during 24 V field wiring faults; ±2.0% output tolerance ensures reliable LVCMOS15 signal integrity. |
Use Scenario: Delivering clean 1.5 V to FPGA configuration memory and auxiliary logic blocks in edge AI inference accelerators. IC Role / Device Role / Timing Role: Fixed-output LDO providing low-noise bias for FPGA configuration SRAM and clock management tiles. Use Value: 78 dB ripple rejection suppresses noise from adjacent 12 V → 3.3 V DC/DC converters; 1.05 V dropout enables efficient use of intermediate 2.55 V bus. |
| Medical Diagnostic Imaging Subsystems | Automotive ADAS Camera Power |
|
Use Scenario: Supplying 1.5 V analog front-end (AFE) circuits in portable ultrasound probe electronics where EMI immunity and thermal reliability are critical. IC Role / Device Role / Timing Role: Low-noise linear regulator powering ADC reference buffers and precision op-amps in time-of-flight signal chains. Use Value: RMS output noise <0.003 %VOUT minimizes quantization error; thermal shutdown at 150 °C protects against enclosure overheating in sealed housings. |
Use Scenario: Providing 1.5 V power to image signal processors (ISPs) in automotive surround-view camera modules operating in engine bay environments. IC Role / Device Role / Timing Role: High-current LDO replacing switching solutions to eliminate EMI-sensitive band interference in 5 GHz Wi-Fi coexistence zones. Use Value: 3.0 A capability supports burst-mode ISP processing; D2PAK-3 package allows direct mounting to metal chassis for passive cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1085CT-1.5#PBF | Pin-compatible TO-220 variant; higher 1.3 V dropout @ 3 A; no SOA protection. | Lacks dynamic current derating under high VIN–VOUT-requires external current limiting for 24 V input scenarios. | Select only when using TO-220 footprint and VIN ≤ 4.5 V; verify thermal design without SOA guardband. |
| TSP5203A-1.5TR | Same 1.5 V output, 3 A rating, and D2PAK-3 package-but uses NPN pass element; 1.2 V dropout; no SOA circuitry. | Higher dropout limits usable input range; absence of SOA demands careful worst-case power dissipation analysis. | Prefer CS5203A-2GDPR3 when input voltage varies widely (e.g., 12 V bus with ripple) or fault tolerance is required. |
Compared with LT1085CT-1.5#PBF and TSP5203A-1.5TR, the CS5203A-2GDPR3 delivers lower dropout, integrated SOA protection for variable-input applications, and guaranteed 1.5 V ±2.0% accuracy-making it optimal for thermally constrained, high-reliability 1.5 V rail generation where input voltage margin is limited.
Availability
CS5203A-2GDPR3 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA auxiliary power, medical imaging AFEs, and automotive ADAS camera systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CS5203A-2GDPR3 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 power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The CS5203A series belongs to onsemi's high-current linear regulator product line, engineered for post-regulation in microprocessor and FPGA power domains where low noise, fast transient response, and robust fault protection are mandatory.
FAQ
What is the maximum input voltage rating for the CS5203A-2GDPR3?
The CS5203A-2GDPR3 has an absolute maximum supply voltage (VCC) rating of 17 V. Operation above this level risks permanent damage. For reliable long-term use, maintain VIN ≤ 15 V per electrical characteristics test conditions, especially when delivering 3.0 A output current.
Does the CS5203A-2GDPR3 require an external output capacitor, and what type is recommended?
Yes, the CS5203A-2GDPR3 requires an external output capacitor for stability and transient performance. A 22 µF tantalum capacitor is specified as minimum; aluminum electrolytic or polymer types may also be used. Ceramic capacitors alone are not recommended due to near-zero ESR, which can cause oscillation.
How does the Safe Operating Area (SOA) protection function in the CS5203A-2GDPR3?
The SOA protection in the CS5203A-2GDPR3 dynamically reduces the maximum allowable output current as the input-output voltage differential increases. This prevents thermal runaway during high-VIN conditions-such as 24 V input with 1.5 V output-without requiring external current-limiting circuitry.
Is the CS5203A-2GDPR3 pin-compatible with other regulators in the same family?
The CS5203A-2GDPR3 shares the same D2PAK-3 pinout (GND, VOUT, VIN) with CS5203A-1GDPR3 (adjustable), CS5203A-3GDPR3 (3.3 V), and CS5203A-5GDPR3 (5.0 V). However, pin compatibility does not imply functional interchangeability-output voltage and internal feedback networks differ between variants.
What thermal considerations apply when using the CS5203A-2GDPR3 at full 3.0 A load?
At 3.0 A and 1.05 V dropout, the CS5203A-2GDPR3 dissipates ~3.15 W. With RJC = 1.6 °C/W and typical RJA ≈ 30–40 °C/W on standard PCBs, junction temperature can exceed 150 °C without heatsinking. Use thermal compound and a heatsink sized to keep TJ ≤ 135 °C for 10-year reliability.
CS5203A-2GDPR3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.15V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 78dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
CS5203A-2GDPR3 FAQ
1.How can I place an order for CS5203A-2GDPR3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5203A-2GDPR3 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 CS5203A-2GDPR3 reliable?
The price and inventory of CS5203A-2GDPR3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5203A-2GDPR3 is usually 5 days.
3.What payment methods are accepted for CS5203A-2GDPR3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5203A-2GDPR3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5203A-2GDPR3?
CS5203A-2GDPR3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5203A-2GDPR3 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 CS5203A-2GDPR3?
For technical support, including CS5203A-2GDPR3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5203A-2GDPR3 requirements.
6.How does Aetrix verify that CS5203A-2GDPR3 is sourced from the original manufacturer or authorized distributors?
All CS5203A-2GDPR3 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 CS5203A-2GDPR3 meets industry standards.
7.What is the process for return or replacement of CS5203A-2GDPR3?
All CS5203A-2GDPR3 units undergo pre-shipment inspection (PSI). If there is an issue with CS5203A-2GDPR3, 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 CS5203A-2GDPR3 part is unused and in its original packaging.
Return procedure for CS5203A-2GDPR3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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