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onsemi CS52015-1GT3
- Part No.:
- CS52015-1GT3
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
CS52015-1GT3.pdf
- Description:
- IC REG LIN POS ADJ 1.5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,087
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Product details
Overview
CS52015-1GT3 from onsemi is a 1.5 A adjustable linear regulator with ±1.0% output voltage accuracy, 1.05 V typical dropout at full load, and operation across 1.25 V to 5.5 V output range using two external resistors. It delivers fast transient response and integrated overcurrent/thermal shutdown protection for post-regulation and microprocessor supply applications.
For engineers reviewing the CS52015-1GT3 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 1.5 A, thermal shutdown threshold (150–210°C), load regulation (0.4% max), reference voltage tolerance (±1.0%), and TO-220-3 package compatibility with heatsink mounting.
Technical Context
The CS52015-1GT3 employs a composite PNP-NPN pass transistor architecture enabling low dropout while maintaining stability with tantalum output capacitors. Its error amplifier maintains a precise 1.254 V reference between VOUT and Adj pins, supporting adjustable output via resistor divider feedback.
Internal protection circuitry includes current limiting (1.6–3.1 A) and thermal shutdown with 25°C hysteresis, ensuring safe operation under overload or elevated ambient conditions. The device operates with input-to-output differential up to 7.0 V and requires minimum load current of 0.6–2.0 mA for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5 A maximum continuous - supports high-current digital loads like microprocessors without external current boosting. |
| Output Voltage Range | 1.25 V to 5.5 V adjustable - set by external R1/R2 divider; enables flexible system-level voltage scaling. |
| Dropout Voltage | 1.05 V typical @ 1.5 A - allows operation with minimal VIN–VOUT margin, critical for low-voltage systems. |
| Reference Voltage | 1.254 V ±1.0% - defines output accuracy baseline; determines absolute output tolerance when combined with resistor tolerances. |
| Thermal Shutdown | 150°C to 210°C activation range - protects die during sustained overload; 25°C hysteresis prevents oscillation near trip point. |
| Line Regulation | 0.20% max - limits output variation due to input voltage changes, essential for stable supply in noisy or variable-input environments. |
| Ripple Rejection | 80 dB @ 120 Hz - suppresses low-frequency input ripple, preserving clean DC output for sensitive analog/digital circuits. |
Pinout & Package
CS52015-1GT3 is housed in a TO-220-3 package (Case 221A) with tab connected to VOUT for direct heatsink mounting and electrical connection. Pin 1 is Adj (adjust), Pin 2 is VOUT (regulated output), Pin 3 is VIN (input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Adj | Adjust reference node | Low-side terminal of internal 1.254 V bandgap reference; connects to resistor divider ground leg to set output voltage. |
| 2 - VOUT | Regulated output | Primary power output; electrically tied to metal tab for thermal conduction and optional grounding isolation. |
| 3 - VIN | Input supply | Unregulated DC input; must remain ≤7.0 V above VOUT to avoid absolute maximum rating violation. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Stabilizes within microseconds after load step - minimizes voltage droop during CPU burst activity. |
| Low dropout voltage | 1.05 V typical @ 1.5 A - enables use with 3.3 V or 5 V input rails to generate sub-3 V logic supplies. |
| Integrated fault protection | Current limit + thermal shutdown - eliminates need for external crowbar or foldback circuitry. |
| Stability with standard capacitors | Compatible with 22 µF tantalum COUT - avoids costly low-ESR ceramic networks required by some LDOs. |
| Pin compatibility | Matches LT1086 family footprint - simplifies drop-in replacement in legacy designs requiring lower dropout. |
Applications
| Microprocessor Core Supply | Post-Regulation for Switching Supplies |
|---|---|
|
Use Scenario: Providing clean, low-noise 1.2 V or 1.8 V core voltage to an embedded ARM processor operating at 600 MHz. IC Role / Device Role / Timing Role: Final-stage linear regulator delivering tightly regulated voltage after a buck converter. Use Value: Fast transient response and <1.1 V dropout ensure stable core voltage during sudden current demand spikes without brownout. |
Use Scenario: Tightening output voltage tolerance and reducing ripple from a 5 V switching supply feeding analog sensors and ADCs. IC Role / Device Role / Timing Role: Low-noise post-regulator improving PSRR and load regulation over temperature. Use Value: 80 dB ripple rejection at 120 Hz and 0.4% load regulation maintain signal integrity in precision measurement circuits. |
| FPGA I/O Bank Supply | Industrial PLC Digital Logic Rail |
|
Use Scenario: Generating configurable 2.5 V or 3.3 V I/O voltage for FPGA banks with varying interface standards. IC Role / Device Role / Timing Role: Adjustable linear regulator enabling single-BOM support for multiple I/O voltage configurations. Use Value: 1.25–5.5 V adjustability via resistor divider allows one CS52015-1GT3 design to serve multiple FPGA voltage requirements. |
Use Scenario: Powering 3.3 V logic in programmable logic controllers exposed to ambient temperatures from −40°C to +70°C. IC Role / Device Role / Timing Role: Industrial-grade linear regulator with guaranteed ±1.0% accuracy over full temperature range. Use Value: Output accuracy maintained across −40°C to +70°C ensures reliable logic level margins despite thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1086CT-1.2#PBF | Higher 1.3 V typical dropout at 1.5 A; same TO-220-3 pinout but no thermal hysteresis spec. | Valid for legacy LT1086 drop-in replacements where slightly higher dropout is acceptable. | Select if existing layout uses LT1086 and thermal hysteresis is not critical. |
| TLV1117-33CDCYR | Fixed 3.3 V output only; 800 mA max current; SOT-223 package; 1.2 V dropout typical. | Limited to fixed-voltage, lower-current applications; unsuitable for adjustable or >1 A loads. | Choose only for cost-sensitive 3.3 V/≤800 mA designs where adjustability and headroom are unnecessary. |
Compared with LT1086CT-1.2#PBF, CS52015-1GT3 offers lower dropout and defined thermal hysteresis; compared with TLV1117-33CDCYR, it provides full adjustability and 87.5% higher current capacity - making CS52015-1GT3 optimal for high-current, thermally demanding, or multi-voltage designs.
Availability
CS52015-1GT3 is available at Aetrix Electronics and suitable for microprocessor core supply, FPGA I/O rail generation, industrial PLC logic power, and post-regulation of switching converters requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for CS52015-1GT3 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 consumer markets.
The CS52015-1GT3 belongs to onsemi's high-current linear regulator product line, engineered specifically for post-regulation and microprocessor supply applications where low dropout, fast transient response, and robust thermal protection are mandatory.
FAQ
What is the maximum input-to-output voltage differential allowed for the CS52015-1GT3?
The CS52015-1GT3 has an absolute maximum supply voltage rating of 7.0 V difference between VIN and VOUT. Exceeding this differential risks permanent damage, especially during short-circuit events where thermal or current-limit protection may not activate quickly enough. Designers must ensure that VIN never exceeds VOUT by more than 7.0 V under any condition, including startup and fault states. This constraint applies directly to the CS52015-1GT3 regardless of package or ambient temperature.
Can the CS52015-1GT3 be used with ceramic output capacitors?
No - the CS52015-1GT3 requires an output capacitor with sufficient ESR for loop stability, and ceramic capacitors typically have near-zero ESR that can cause oscillation. The datasheet explicitly recommends tantalum or aluminum electrolytic capacitors (e.g., 22 µF) to ensure stable operation. Using ceramic capacitors with the CS52015-1GT3 may result in instability, excessive output ripple, or failure to regulate. This requirement is inherent to the CS52015-1GT3's internal compensation design.
What is the purpose of the adjust (Adj) pin on the CS52015-1GT3?
The Adj pin on the CS52015-1GT3 serves as the low-side reference node for the internal 1.254 V bandgap voltage. It forms one end of the external resistor divider (R1–R2) that sets the output voltage according to VOUT = 1.254 V × (1 + R1/R2) + IAdj × R2. Because the Adj pin draws ~50 µA, this current introduces a small error term that must be accounted for in precision applications. The function is fundamental to the CS52015-1GT3's adjustable architecture and cannot be omitted or bypassed.
Does the CS52015-1GT3 require a minimum load current, and why?
Yes - the CS52015-1GT3 requires a minimum load current of 0.6–2.0 mA to maintain regulation, primarily to bias the internal error amplifier and ensure proper feedback loop operation. This current is typically supplied through the R1 resistor in the output voltage divider network. If the total load (including R1 current) falls below this threshold, the CS52015-1GT3 may lose regulation or exhibit poor line/load regulation. This behavior is specified in the CS52015-1GT3's Electrical Characteristics table and applies across all operating temperatures.
How does the thermal shutdown feature operate in the CS52015-1GT3?
The CS52015-1GT3 incorporates fully tested thermal shutdown that activates between 150°C and 210°C junction temperature, with 25°C hysteresis to prevent cycling near the trip point. Once triggered, the device disables the pass transistor until junction temperature falls below the hysteresis threshold. This protection is 100% functionally tested in production and is independent of output current or input voltage - it responds solely to die temperature. The feature is integral to every CS52015-1GT3 unit and ensures reliability under sustained overload or inadequate heatsinking.
CS52015-1GT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 1.4V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 2 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
CS52015-1GT3 FAQ
1.How can I place an order for CS52015-1GT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS52015-1GT3 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 CS52015-1GT3 reliable?
The price and inventory of CS52015-1GT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS52015-1GT3 is usually 5 days.
3.What payment methods are accepted for CS52015-1GT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS52015-1GT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS52015-1GT3?
CS52015-1GT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS52015-1GT3 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 CS52015-1GT3?
For technical support, including CS52015-1GT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS52015-1GT3 requirements.
6.How does Aetrix verify that CS52015-1GT3 is sourced from the original manufacturer or authorized distributors?
All CS52015-1GT3 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 CS52015-1GT3 meets industry standards.
7.What is the process for return or replacement of CS52015-1GT3?
All CS52015-1GT3 units undergo pre-shipment inspection (PSI). If there is an issue with CS52015-1GT3, 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 CS52015-1GT3 part is unused and in its original packaging.
Return procedure for CS52015-1GT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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