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onsemi CS52015-3GSTR3
- Part No.:
- CS52015-3GSTR3
- Manufacturer:
- onsemi
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
CS52015-3GSTR3.pdf
- Description:
- IC REG LINEAR 3.3V 1.5A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,039
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Product details
Overview
CS52015-3GSTR3 from onsemi is a fixed-output 3.3 V, 1.5 A linear regulator in SOT-223 package, featuring ±1.5% output accuracy over temperature, 1.05 V typical dropout at full load, fast transient response, and integrated over-current and thermal shutdown protection-designed for microprocessor post-regulation and low-voltage embedded power rails.
For engineers reviewing the CS52015-3GSTR3 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage under 1.4 V at 1.5 A, quiescent current ≤10 mA at full load, thermal shutdown at 150°C, and compatibility with tantalum output capacitors ≥22 µF for stability in high-dI/dt digital loads.
Technical Context
The CS52015-3GSTR3 employs a composite PNP-NPN pass transistor architecture to achieve low dropout and fast loop response. Its error amplifier drives the output stage with bandgap reference feedback, enabling stable regulation across input voltages from 4.7 V to 7.0 V while maintaining ±1.5% output accuracy from −40°C to +70°C ambient.
Thermal shutdown activates at 150°C junction temperature with 25°C hysteresis, and current limiting triggers between 1.6 A and 3.1 A depending on VIN–VOUT differential. Ripple rejection is 80 dB at 120 Hz with 1.0 VPP input ripple and 3.0 V headroom.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±1.5% (3.25–3.35 V), guaranteed over temperature and load for precision logic supply rails |
| Max Output Current | 1.5 A continuous-supports single-core microprocessors and FPGA I/O banks without derating at TA ≤70°C |
| Dropout Voltage | 1.05 V typical @ 1.5 A-enables operation from 4.35 V input, critical for battery-backed or low-headroom systems |
| Quiescent Current | 5.0–10 mA @ full load-minimizes no-load power loss in always-on subsystems |
| Ripple Rejection | 80 dB @ 120 Hz-suppresses switching noise from upstream DC/DC converters feeding digital loads |
| Thermal Shutdown | 150°C activation with 25°C hysteresis-prevents permanent damage during sustained overload or poor heatsinking |
| Line Regulation | 0.02% typical-ensures <±0.7 mV output shift across 2.0–3.7 V input differential, vital for ADC reference stability |
Pinout & Package
SOT-223 package (Case 318E), surface-mount, thermally enhanced with exposed tab connected to VOUT; footprint compatible with JEDEC MO-178.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal bias and error amplifier; must be low-impedance connection to minimize load regulation error |
| 2 (VOUT) | Regulated output | Power output terminal and thermal tab connection-requires direct PCB copper pour for heat dissipation |
| 3 (VIN) | Input supply | Unregulated input source; minimum 4.7 V required to maintain regulation at 1.5 A due to dropout constraints |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | ≤±30 mV deviation under 1.5 A load step (Figure 7), enabling stable core voltage during CPU burst activity |
| Tantalum capacitor stability | Optimized for ≥22 µF tantalum output capacitor-avoids instability caused by ceramic caps' near-zero ESR |
| Composite PNP-NPN pass device | Enables lower dropout than standard NPN regulators while retaining robust short-circuit capability |
| Thermal shutdown with hysteresis | 150°C trip + 25°C cooldown prevents thermal cycling failure during intermittent overload conditions |
Applications
| Microprocessor Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-M4 or RISC-V MCU cores requiring clean 3.3 V at up to 1.5 A peak current during instruction fetch bursts. IC Role / Device Role / Timing Role: Primary post-regulator delivering tightly regulated voltage directly to processor VDD pins. Use Value: 1.05 V dropout allows use of 5.0 V intermediate rail; ±1.5% accuracy ensures reliable operation across industrial temperature range. | Use Scenario: Supplying configurable I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs where voltage tolerance must stay within ±3%. IC Role / Device Role / Timing Role: Fixed-output LDO providing isolated, low-noise power to FPGA bank groups independent of core voltage domain. Use Value: 80 dB ripple rejection suppresses noise from shared 5 V DC/DC converter, preventing I/O timing violations. |
| Industrial PLC Digital I/O Module | Medical Sensor Signal Chain Bias |
Use Scenario: Regulating 3.3 V for opto-isolated digital input/output drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring stable logic levels despite wide input bus voltage variation (24 V ±20%). Use Value: Thermal shutdown protects against enclosure overheating in sealed enclosures; 1.5 A rating supports multiple parallel driver ICs. | Use Scenario: Providing ultra-low-noise 3.3 V bias to precision analog front-end (AFE) ICs and 24-bit delta-sigma ADCs in portable patient monitors. IC Role / Device Role / Timing Role: Low-ripple, low-drift voltage source for reference and analog supply domains. Use Value: 0.02% line regulation minimizes offset drift in sensor amplifiers; fast transient response prevents ADC code flicker during digital activity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1086CM-3.3#PBF | Pin-compatible but higher 1.3 V typical dropout at 1.5 A; ±2% output accuracy | Less suitable for low-input-headroom designs; requires larger heatsink above 1 A in SOT-223 | Select CS52015-3GSTR3 when dropout <1.2 V or accuracy tighter than ±2% is required |
| TLV1117-33CDCYR | Lower 800 mA max output; 1.2 V dropout typical; SOT-223 package same footprint | Not viable for 1.5 A loads; limited thermal margin in continuous operation | Choose CS52015-3GSTR3 for applications demanding full 1.5 A with margin at 70°C ambient |
Compared with LT1086CM-3.3#PBF and TLV1117-33CDCYR, the CS52015-3GSTR3 delivers superior dropout performance and tighter output accuracy at full rated current-making it the preferred choice for thermally constrained, high-current 3.3 V regulation where headroom is limited and precision matters.
Availability
CS52015-3GSTR3 is available at Aetrix Electronics and suitable for microprocessor core supplies, FPGA I/O regulation, and industrial PLC digital I/O modules requiring stable component supply with consistent tape-and-reel packaging and traceable lot control.
Supply support for CS52015-3GSTR3 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 focused on energy-efficient power and signal management solutions for automotive, industrial, cloud computing, and medical applications.
The CS52015-3GSTR3 belongs to onsemi's high-current linear regulator product line, engineered specifically for post-regulation of switching supplies in space-constrained embedded systems where low dropout, fast transient response, and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for the CS52015-3GSTR3?
The CS52015-3GSTR3 has an absolute maximum supply voltage (VIN) of 7.0 V. Operation above this level risks permanent damage. For reliable 1.5 A output, VIN must exceed 4.35 V (3.3 V + 1.05 V dropout) and remain ≤7.0 V per the Absolute Maximum Ratings table. Derating is recommended above 6.5 V to manage power dissipation and thermal stress in the SOT-223 package.
Does the CS52015-3GSTR3 require an external output capacitor, and what type is recommended?
Yes, the CS52015-3GSTR3 requires an external output capacitor for stability. A 22 µF tantalum capacitor is the minimum recommended value; aluminum electrolytic or multi-capacitor networks (tantalum + ceramic) improve transient response. Ceramic-only solutions are discouraged due to near-zero ESR causing potential oscillation. The CS52015-3GSTR3 datasheet explicitly warns against using film or ceramic capacitors alone.
Is the CS52015-3GSTR3 pin-compatible with other SOT-223 linear regulators?
The CS52015-3GSTR3 uses standard SOT-223 pinout (Pin 1 = GND, Pin 2 = VOUT, Pin 3 = VIN), matching industry convention. It is explicitly stated as pin-compatible with the LT1086 family. However, electrical differences-including dropout voltage, current limit threshold, and thermal shutdown behavior-require validation before drop-in replacement. Always verify layout compatibility and thermal design for the CS52015-3GSTR3's 1.5 A capability.
What is the thermal resistance (RJA) of the CS52015-3GSTR3 in its SOT-223 package?
The CS52015-3GSTR3 in SOT-223 has a typical junction-to-ambient thermal resistance (RJA) of 156°C/W under standard JEDEC test conditions (1s2 pad, no heatsink). This value assumes minimal PCB copper; adding a 1-inch2 2-oz copper pour reduces RJA significantly. The datasheet notes RJC = 15°C/W, confirming the SOT-223's thermal limitations versus TO-220 or D2PAK variants.
How does the CS52015-3GSTR3 handle short-circuit conditions?
The CS52015-3GSTR3 incorporates foldback current limiting and thermal shutdown for short-circuit protection. Under short-circuit, output current is limited between 1.6 A and 3.1 A depending on VIN–VOUT differential (per Electrical Characteristics table). If sustained, junction temperature rises until thermal shutdown activates at 150°C, halting output. After cooldown (25°C hysteresis), the CS52015-3GSTR3 automatically recovers-no latch or manual reset required.
CS52015-3GSTR3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 10 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:
- Surface Mount
- Supplier Device Package:
- SOT-223 (TO-261)
CS52015-3GSTR3 FAQ
1.How can I place an order for CS52015-3GSTR3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS52015-3GSTR3 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 CS52015-3GSTR3 reliable?
The price and inventory of CS52015-3GSTR3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS52015-3GSTR3 is usually 5 days.
3.What payment methods are accepted for CS52015-3GSTR3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS52015-3GSTR3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS52015-3GSTR3?
CS52015-3GSTR3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS52015-3GSTR3 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 CS52015-3GSTR3?
For technical support, including CS52015-3GSTR3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS52015-3GSTR3 requirements.
6.How does Aetrix verify that CS52015-3GSTR3 is sourced from the original manufacturer or authorized distributors?
All CS52015-3GSTR3 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 CS52015-3GSTR3 meets industry standards.
7.What is the process for return or replacement of CS52015-3GSTR3?
All CS52015-3GSTR3 units undergo pre-shipment inspection (PSI). If there is an issue with CS52015-3GSTR3, 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 CS52015-3GSTR3 part is unused and in its original packaging.
Return procedure for CS52015-3GSTR3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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