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onsemi CS5204-2GDP3
- Part No.:
- CS5204-2GDP3
- Manufacturer:
- onsemi
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
CS5204-2GDP3.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:3,593
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Product details
Overview
CS5204-2GDP3 from onsemi is a 4.0 A, 1.5 V fixed-output linear regulator in D2PAK-3 package, featuring ±2.0% output voltage accuracy, 1.10 V typical dropout at full load, thermal shutdown, overcurrent protection, and SOA limiting-designed for GTL bus termination in high-current, low-voltage digital systems.
For engineers reviewing the CS5204-2GDP3 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage under 4.0 A load, thermal regulation stability at 150°C junction limit, quiescent current ≤10 mA at full load, and compatibility with 22 µF tantalum output capacitance for transient response.
Technical Context
The CS5204-2GDP3 employs a composite PNP-NPN output stage optimized for low-dropout operation at high current, with internal bandgap reference and error amplifier enabling precise 1.5 V regulation. Its SOA protection dynamically reduces available output current as VIN–VOUT differential increases, preventing thermal runaway during high-dV/dt transients.
It requires external output capacitance (≥22 µF tantalum) for loop stability and transient response; ceramic-only networks are discouraged due to near-zero ESR-induced instability. Ripple rejection is 75 dB at 120 Hz with 4.0 A load, and thermal shutdown activates at 150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.50 V ±2.0% - ensures stable core voltage for GTL-compatible logic under full 4.0 A load and temperature variation. |
| Dropout Voltage | 1.10 V (typ) @ 4.0 A - enables operation with minimal input overhead, critical for 1.5 V systems supplied from 2.5–3.3 V rails. |
| Quiescent Current | ≤10 mA @ full load - minimizes no-load power loss while maintaining fast loop response. |
| Ripple Rejection | 75 dB @ 120 Hz, 4.0 A - suppresses input supply noise to protect sensitive downstream logic from voltage perturbation. |
| Thermal Shutdown | 150°C activation, 25°C hysteresis - prevents permanent damage during sustained overload or inadequate heatsinking. |
| Safe Operating Area | Current derating vs. VIN–VOUT differential - enforces dynamic current limit to avoid second breakdown in high-VDS conditions. |
Pinout & Package
D2PAK-3 surface-mount package (Case 418AB), thermally enhanced with exposed tab connected to VOUT. Requires thermal compound and PCB copper pour for heatsinking; tab must be electrically tied to output net.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal error amplifier and protection circuitry; must be low-impedance connection to minimize noise coupling. |
| 2 | VOUT | Regulated 1.5 V output; also connected to exposed tab - serves as primary thermal path and must be routed to large copper area. |
| 3 | VIN | Input supply (up to 17 V); feeds composite pass transistor and bias circuitry - requires local 10 µF input capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| 4.0 A continuous output | Supports high-current GTL bus termination without parallel devices or external current boosting. |
| ±2.0% output accuracy | Meets tight voltage tolerance requirements of modern logic families operating at 1.5 V nominal. |
| Fast transient response | Stabilizes within microseconds after step-load changes up to 4.0 A - critical for burst-mode digital loads. |
| SOA protection | Automatically scales current limit based on VIN–VOUT differential, eliminating need for external foldback circuitry. |
| Low 1.10 V dropout | Permits use with 2.5 V or 3.3 V intermediate rails while delivering full 4.0 A at 1.5 V - improves system efficiency. |
Applications
| High-Speed Bus Termination | Microprocessor Core Supply |
|---|---|
Use Scenario: Termination of GTL (Gunning Transceiver Logic) buses in high-speed backplanes and motherboard interconnects. IC Role / Device Role / Timing Role: Provides stable 1.5 V termination voltage with fast transient response to absorb signal reflections. Use Value: Maintains signal integrity across multi-GHz data rates by minimizing voltage droop during rapid bus switching events. | Use Scenario: Primary core voltage regulator for early-generation Pentium-class CPUs requiring 1.5 V @ >3 A. IC Role / Device Role / Timing Role: Delivers tightly regulated DC voltage to CPU core, synchronized with clock-domain power sequencing. Use Value: Enables reliable operation under dynamic load steps up to 4.0 A with <0.1% RMS output noise (%VOUT). |
| ASIC I/O Power Rail | Industrial PLC Logic Supply |
Use Scenario: Powering configurable I/O banks in programmable logic devices where voltage margin is constrained. IC Role / Device Role / Timing Role: Supplies clean, low-noise 1.5 V to FPGA or ASIC I/O banks with simultaneous switching noise immunity. Use Value: Achieves 75 dB ripple rejection at 120 Hz, suppressing AC-coupled noise from shared power distribution networks. | Use Scenario: Providing robust 1.5 V logic supply in programmable logic controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Regulator with thermal shutdown and SOA protection ensures fail-safe operation in unventilated enclosures. Use Value: Sustains operation from −40°C to +70°C ambient with guaranteed 150°C junction limit and 25°C thermal hysteresis. |
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 |
|---|---|---|---|
| LM3940IT-1.5/NOPB | 3.0 A max output, 1.5 V fixed, TO-220 package only; higher 1.3 V dropout at full load. | Limited to lower-current applications; lacks SOA protection and thermal hysteresis specification. | Choose when 3.0 A suffices and D2PAK footprint is not required. |
| LT1528CT#PBF | 3.0 A, 1.5 V fixed, 1.2 V dropout @ 3 A; includes enable pin and tighter 1.0% initial accuracy. | Requires external enable control; no SOA protection - relies on external current limiting. | Prefer when system-level enable sequencing is needed and SOA is managed externally. |
Compared with LM3940IT-1.5/NOPB and LT1528CT#PBF, the CS5204-2GDP3 delivers higher 4.0 A output, integrated SOA protection, and D2PAK-3 surface-mount compatibility - making it uniquely suited for space-constrained, high-current GTL termination where autonomous fault handling is essential.
Availability
CS5204-2GDP3 is available at Aetrix Electronics and suitable for GTL bus termination, microprocessor core supply, and industrial PLC logic supply requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CS5204-2GDP3 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 manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The CS5204-2GDP3 belongs to onsemi's high-current linear regulator product line, engineered specifically for low-voltage, high-current digital interface power delivery-including GTL, SSTL, and HSTL bus standards-where precision, thermal resilience, and transient performance are critical.
FAQ
What is the maximum input voltage rating for the CS5204-2GDP3?
The CS5204-2GDP3 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 rails to remain ≤15 V under worst-case transient conditions, especially when combined with high output current and elevated ambient temperature.
Does the CS5204-2GDP3 require an external output capacitor, and what type is recommended?
Yes, the CS5204-2GDP3 requires an external output capacitor for stability and transient response. A minimum 22 µF tantalum capacitor is specified, and higher values improve load-step performance. Aluminum electrolytic capacitors are acceptable but exhibit greater ESR variation at low temperatures. Ceramic capacitors alone are not recommended due to near-zero ESR causing potential loop instability.
How does the Safe Operating Area (SOA) protection function in the CS5204-2GDP3?
The CS5204-2GDP3 implements dynamic SOA protection that continuously monitors VIN–VOUT differential and output current. As the input-to-output voltage difference increases, the device automatically reduces its maximum allowable output current to prevent second breakdown of the composite PNP-NPN pass transistor - eliminating need for external foldback resistors or current-sense circuitry.
Can the CS5204-2GDP3 be used without a heatsink in low-power applications?
No - even at partial load, the CS5204-2GDP3 requires thermal management. Its RJC is 1.6°C/W, and RJA can exceed 50°C/W on standard FR-4 without copper pour. At 4.0 A and 3.0 V dropout, power dissipation reaches 12 W, necessitating a heatsink or substantial PCB copper area. Thermal shutdown will activate if junction temperature exceeds 150°C.
Is remote voltage sensing supported on the CS5204-2GDP3?
No, the CS5204-2GDP3 is a three-terminal regulator (VIN, VOUT, GND) with no dedicated sense pins. Load regulation is limited by PCB trace resistance between the device and load. To minimize voltage drop, place the CS5204-2GDP3 as close as possible to the load and use Kelvin-style grounding - routing the GND return directly to the regulator's ground pin rather than through shared plane impedance.
CS5204-2GDP3 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):
- 1.2V @ 4A
- Current - Output:
- 4A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (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
CS5204-2GDP3 FAQ
1.How can I place an order for CS5204-2GDP3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5204-2GDP3 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 CS5204-2GDP3 reliable?
The price and inventory of CS5204-2GDP3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5204-2GDP3 is usually 5 days.
3.What payment methods are accepted for CS5204-2GDP3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5204-2GDP3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5204-2GDP3?
CS5204-2GDP3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5204-2GDP3 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 CS5204-2GDP3?
For technical support, including CS5204-2GDP3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5204-2GDP3 requirements.
6.How does Aetrix verify that CS5204-2GDP3 is sourced from the original manufacturer or authorized distributors?
All CS5204-2GDP3 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 CS5204-2GDP3 meets industry standards.
7.What is the process for return or replacement of CS5204-2GDP3?
All CS5204-2GDP3 units undergo pre-shipment inspection (PSI). If there is an issue with CS5204-2GDP3, 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 CS5204-2GDP3 part is unused and in its original packaging.
Return procedure for CS5204-2GDP3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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