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onsemi CS5203A-2GDPR3G
- Part No.:
- CS5203A-2GDPR3G
- Manufacturer:
- onsemi
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
CS5203A-2GDPR3G.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,352
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Product details
Overview
CS5203A-2GDPR3G 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 uses a composite PNP-NPN output stage and is designed for microprocessor core supplies and post-regulation in industrial power systems.
For engineers reviewing the CS5203A-2GDPR3G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage under 1.15 V at 3 A, quiescent current ≤10 mA, thermal shutdown at 150°C, and D2PAK-3 Pb-free packaging for high-current DC/DC secondary regulation.
Technical Context
The CS5203A-2GDPR3G implements a three-terminal fixed-output architecture with internal bandgap reference, error amplifier, and composite PNP-NPN pass transistor. Its SOA protection dynamically reduces maximum output current as VIN–VOUT increases, preventing thermal runaway during high-differential-voltage operation.
Designed for low-noise, high-transient-response applications, it achieves 78 dB ripple rejection at 120 Hz and 0.003%VOUT RMS output noise (10 Hz–10 kHz). The device requires a minimum 22 µF tantalum output capacitor for stability and supports Kelvin-sense–compatible layout per datasheet Figure 13.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2.0% - ensures stable core voltage for low-voltage logic and embedded controllers. |
| Output Current | 3.0 A continuous - supports high-current FPGA I/O banks or ASIC auxiliary rails without derating. |
| Dropout Voltage | 1.05 V @ 3.0 A - enables operation from 2.55 V input, critical for battery-backed or multi-rail systems. |
| Quiescent Current | 5.0–10 mA @ ≤9 V input - minimizes no-load power loss in always-on subsystems. |
| Thermal Shutdown | 150°C activation with 25°C hysteresis - prevents latch-up during sustained overload or heatsink failure. |
| Ripple Rejection | 78 dB @ 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the regulator. |
| Load Regulation | 0.03–0.4% over 10 mA–3.0 A - maintains tight voltage control across dynamic CPU load transitions. |
Pinout & Package
D2PAK-3 surface-mount package (Case 418F), Pb-free, tab connected to VOUT for direct thermal coupling to heatsink or PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal error amplifier and protection circuitry; must be low-impedance connection to minimize load regulation error. |
| 2 | VOUT | Regulated 1.5 V output; case-connected - serves as thermal path and primary output node; requires Kelvin sense routing per datasheet Figure 13. |
| 3 | VIN | Input supply (up to 17 V); must be decoupled with ≥10 µF input capacitor to ensure stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Safe Operating Area (SOA) Protection | Dynamic current limiting that scales max output current inversely with VIN–VOUT to prevent thermal destruction under high-differential conditions. |
| Low Dropout Voltage | 1.05 V at 3.0 A - enables higher efficiency than LT1085-family regulators in same footprint, reducing power loss by >0.3 W at full load. |
| Pb-Free D2PAK-3 Packaging | RoHS-compliant surface-mount package with short leads (Case 418F), optimized for automated reflow and thermal transfer to PCB. |
| Fast Transient Response | Stable with 22 µF tantalum output capacitor; supports >1 A/µs load steps typical of digital processor cores without excessive droop. |
| Integrated Fault Protection | Single-die integration of thermal shutdown, overcurrent, and SOA - eliminates need for external current-sense resistors or thermal sensors. |
Applications
| Microprocessor Core Supply | FPGA I/O Bank Regulator |
|---|---|
|
Use Scenario: Powering ARM Cortex-A series SoC core rails requiring tightly regulated 1.5 V at up to 3 A with fast load-step response. IC Role / Device Role / Timing Role: Primary low-dropout post-regulator converting intermediate 3.3 V or 5 V bus to precise 1.5 V core voltage. Use Value: 1.05 V dropout enables use with 2.55 V input, preserving headroom for upstream converter tolerance and trace IR drop. |
Use Scenario: Delivering clean, stable 1.5 V to high-speed FPGA I/O banks where noise and transient droop impact signal integrity. IC Role / Device Role / Timing Role: Fixed-output LDO providing low-noise bias for LVDS or RSDS interface circuits. Use Value: 78 dB ripple rejection attenuates switching noise from adjacent DC/DC converters, reducing jitter in high-speed serial links. |
| Industrial PLC Power Module | Medical Diagnostic Imaging Subsystem |
|
Use Scenario: Generating 1.5 V for real-time control microcontrollers in programmable logic controllers operating in extended temperature environments. IC Role / Device Role / Timing Role: Robust, thermally protected local regulator replacing discrete MOSFET-based solutions. Use Value: 150°C thermal shutdown with 25°C hysteresis ensures fail-safe operation in sealed enclosures without active cooling. |
Use Scenario: Supplying analog front-end circuitry in portable ultrasound or MRI subsystems where EMI and reliability are critical. IC Role / Device Role / Timing Role: Low-noise, fault-protected power source for precision ADC drivers and sensor interfaces. Use Value: 0.003%VOUT RMS output noise (10 Hz–10 kHz) preserves SNR in sensitive analog signal chains without additional filtering. |
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 at 3 A; ±1.5% initial accuracy. | Lacks SOA protection; requires external current-limiting components for high-VIN–VOUT operation. | Choose when legacy TO-220 mounting is required and differential voltage remains ≤2.5 V. |
| TPS7A8300RGRT | 2 A max output; 0.6 V dropout at 2 A; 1% accuracy; integrated soft-start and enable pin. | Lower current rating and different package (QFN-20); lacks SOA protection but offers sequencing control. | Prefer for space-constrained designs needing enable/sequencing, provided 2 A suffices and SOA is not critical. |
Compared with LT1085CT-1.5#PBF and TPS7A8300RGRT, the CS5203A-2GDPR3G uniquely combines 3 A capability, SOA protection, and D2PAK-3 thermal performance-making it optimal for high-reliability, high-current industrial loads where input-to-output differential varies.
Availability
CS5203A-2GDPR3G is available at Aetrix Electronics and suitable for microprocessor core supplies, FPGA I/O regulation, industrial PLC power modules, and medical imaging subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CS5203A-2GDPR3G 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, and sensing technologies for automotive, industrial, and cloud infrastructure markets.
The CS5203A-2GDPR3G belongs to onsemi's high-current linear regulator product line, engineered specifically for post-regulation in demanding embedded power systems where thermal robustness, fault resilience, and low-noise operation are essential.
FAQ
What is the maximum input voltage rating for the CS5203A-2GDPR3G?
The CS5203A-2GDPR3G has an absolute maximum supply voltage (VCC) rating of 17 V. Operation above this level risks permanent damage to the internal pass transistor and protection circuitry. For reliable long-term use, design input voltage to remain ≤15 V under all conditions, including transients and ripple, as specified in the Electrical Characteristics table.
Does the CS5203A-2GDPR3G require an external output capacitor, and what type is recommended?
Yes, the CS5203A-2GDPR3G requires an external output capacitor for loop stability and transient response. A minimum 22 µF tantalum capacitor is specified; aluminum electrolytic capacitors are acceptable but exhibit greater ESR variation at low temperatures. Ceramic capacitors alone are not recommended due to near-zero ESR, which can cause instability. For best results, use a parallel network of tantalum and ceramic capacitors placed close to the load.
How does the Safe Operating Area (SOA) protection function in the CS5203A-2GDPR3G?
The SOA protection in the CS5203A-2GDPR3G dynamically limits output current based on the instantaneous VIN–VOUT differential. As the input-to-output voltage difference increases, the maximum allowable output current decreases to prevent junction overheating and second breakdown in the composite PNP-NPN pass transistor. This behavior is intrinsic to the die design and requires no external components.
Is the CS5203A-2GDPR3G pin-compatible with other regulators in the CS5203A family?
Yes, the CS5203A-2GDPR3G shares identical pinout and package (D2PAK-3) with all CS5203A-x variants, including CS5203A-1 (adjustable), CS5203A-3 (3.3 V), and CS5203A-5 (5.0 V). This allows board-level substitution across output voltages without layout changes, provided thermal and electrical constraints of the target voltage are met.
What thermal resistance values apply to the CS5203A-2GDPR3G in D2PAK-3 packaging?
The CS5203A-2GDPR3G in D2PAK-3 (Case 418F) has a typical junction-to-case thermal resistance (RJC) of 1.6°C/W. Total junction-to-ambient resistance (RJA) ranges from 10 to 50°C/W depending on PCB copper area, heatsink attachment, and airflow. For 3 A operation at 1.5 V output, thermal design must ensure junction temperature stays ≤150°C using Equation TJ = TA + PD × RJA, where PD ≈ (VIN − 1.5 V) × 3 A + VIN × IQ.
CS5203A-2GDPR3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Bulk
- Product Status:
- Active
- 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-2GDPR3G FAQ
1.How can I place an order for CS5203A-2GDPR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5203A-2GDPR3G 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-2GDPR3G reliable?
The price and inventory of CS5203A-2GDPR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5203A-2GDPR3G is usually 5 days.
3.What payment methods are accepted for CS5203A-2GDPR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5203A-2GDPR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5203A-2GDPR3G?
CS5203A-2GDPR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5203A-2GDPR3G 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-2GDPR3G?
For technical support, including CS5203A-2GDPR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5203A-2GDPR3G requirements.
6.How does Aetrix verify that CS5203A-2GDPR3G is sourced from the original manufacturer or authorized distributors?
All CS5203A-2GDPR3G 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-2GDPR3G meets industry standards.
7.What is the process for return or replacement of CS5203A-2GDPR3G?
All CS5203A-2GDPR3G units undergo pre-shipment inspection (PSI). If there is an issue with CS5203A-2GDPR3G, 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-2GDPR3G part is unused and in its original packaging.
Return procedure for CS5203A-2GDPR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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