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onsemi CS5207-2GT3
- Part No.:
- CS5207-2GT3
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
CS5207-2GT3.pdf
- Description:
- IC REG LINEAR 1.5V 7A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,821
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Product details
Overview
CS5207-2GT3 from onsemi is a 7.0 A, 1.5 V fixed-output linear regulator in TO-220 package, designed for active GTL bus termination on Intel-based motherboards. It delivers ±2.0% output voltage accuracy, 1.42–1.65 V dropout at full load, and integrates thermal shutdown, overcurrent, and safe operating area (SOA) protection.
For engineers reviewing the CS5207-2GT3 datasheet, pinout, applications, or equivalent options, key selection criteria include low-dropout performance under high-current transient loads, Kelvin-sense-compatible layout requirements, thermal management with RΘJC = 1.6°C/W, and compatibility with tantalum output capacitors ≥22 μF.
Technical Context
The CS5207-2GT3 employs a composite PNP-NPN output stage optimized for fast transient response and stable operation with 22 μF tantalum output capacitance. Its SOA protection dynamically reduces maximum output current as VIN−VOUT increases, preventing thermal runaway during high-differential-voltage conditions.
It operates across −40°C to +70°C ambient, supports input voltages up to 17 V, and maintains regulation with dropout as low as 1.0 V at reduced load. Quiescent current remains ≤10 mA at 7.0 A output, enabling efficient power delivery in tightly regulated motherboard subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.50 V ±2.0% (1.47–1.53 V), trimmed at production for GTL termination accuracy |
| Max Output Current | 7.0 A continuous, limited by SOA and thermal shutdown at TJ ≥150°C |
| Dropout Voltage | 1.42–1.65 V @ 7.0 A - defines minimum VIN required for regulation |
| Line Regulation | 0.04–0.20% over 1.65–6.0 V input differential - ensures stability across supply rail variation |
| Ripple Rejection | 80 dB @ 120 Hz - suppresses low-frequency noise from upstream switching supplies |
| Quiescent Current | 5.0–10 mA @ IOUT = 10 mA - enables low-noise biasing without excessive standby loss |
| Thermal Shutdown | 150–180°C with 25°C hysteresis - prevents latch-up and enables safe auto-recovery |
Pinout & Package
CS5207-2GT3 uses the TO-220 three-lead straight-leaded package (Case 221A), with tab electrically connected to VOUT. Thermal compound and mechanical mounting to a heatsink are mandatory for 7.0 A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Low-impedance return path for error amplifier and protection circuitry; must be routed separately from high-current GND paths |
| 2 (VOUT) | Regulated output | Electrically tied to metal tab - requires isolation if heatsink is grounded; Kelvin sense point is 6.35 mm (1/4″) from package bottom |
| 3 (VIN) | Input supply | Accepts up to 17 V DC; dropout-sensitive - input decoupling must minimize impedance to sustain transient load demands |
Key Features
| Feature | Design Value |
|---|---|
| Composite PNP-NPN output stage | Enables fast loop response and stable operation with standard tantalum output capacitors (no ceramic ESR tuning required) |
| SOA protection | Dynamically scales current limit vs. VIN−VOUT to prevent second breakdown during high-differential transients |
| Thermal shutdown with hysteresis | 150°C trip + 25°C hysteresis ensures reliable recovery after overload without oscillation |
| Fixed 1.5 V output | ±2.0% tolerance trimmed at wafer level - eliminates external resistor network and improves GTL bus signal integrity |
| Low quiescent current | ≤10 mA at full 7.0 A load - minimizes self-heating impact on thermal design margin |
Applications
| Intel GTL Bus Termination | High-Current Point-of-Load Regulation |
|---|---|
Use Scenario: Active termination of GTL-signaled address/data buses on Pentium-class server and desktop motherboards. IC Role / Device Role / Timing Role: Provides precise 1.5 V DC bias and dynamic current sink/source to maintain GTL logic thresholds and reduce signal reflections. Use Value: Enables clean 100+ MHz GTL signaling with <0.1% voltage deviation under 5 A step-load transients, meeting Intel GTL+ specification timing margins. |
Use Scenario: Local 1.5 V supply for FPGA I/O banks or ASIC core logic requiring high-current, low-noise regulation near the load. IC Role / Device Role / Timing Role: Delivers stable 1.5 V with minimal PSRR degradation across 10 Hz–10 kHz, supporting jitter-sensitive digital interfaces. Use Value: Achieves 0.003%/VOUT RMS noise and 80 dB ripple rejection - critical for maintaining setup/hold timing in high-speed SerDes links. |
| Server Memory Subsystem Bias | Industrial Control Backplane Power |
Use Scenario: Providing termination voltage for registered DIMM command/address buses in dual-processor server platforms. IC Role / Device Role / Timing Role: Supplies regulated 1.5 V to multiple parallel GTL receivers while maintaining tight load regulation (<0.40%) across 10 mA–7.0 A range. Use Value: Ensures consistent memory controller timing margin across temperature (−40°C to +70°C) and line/load variations per JEDEC DDR specifications. |
Use Scenario: Powering programmable logic controllers (PLCs) and industrial backplanes where reliability under thermal stress is critical. IC Role / Device Role / Timing Role: Serves as primary 1.5 V source with integrated SOA and thermal shutdown - eliminating need for external fault monitoring. Use Value: Survives sustained 7.0 A load at 70°C ambient with properly sized heatsink (RΘJA ≤ 30°C/W), meeting IEC 61000-6-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM396T | Adjustable output (1.2–37 V), 10 A max, no SOA protection, higher dropout (≥2.0 V @ 7 A) | Requires external resistors and compensation; unsuitable for GTL termination due to lack of fixed 1.5 V trim | Use only when adjustable output and higher current headroom outweigh precision and protection needs |
| LT1585ACT-1.5 | Fixed 1.5 V, 4.5 A max, 1.3 V dropout @ 4.5 A, no SOA, lower thermal rating (RΘJC = 2.5°C/W) | Limited to ≤4.5 A; cannot support full 7.0 A GTL termination load without derating or parallel devices | Select only for space-constrained designs where 4.5 A suffices and SOA is not required |
Compared with LM396T and LT1585ACT-1.5, the CS5207-2GT3 uniquely combines factory-trimmed 1.5 V ±2.0%, 7.0 A capability, SOA protection, and 1.42 V dropout - making it the only single-device solution qualified for Intel GTL bus termination at full spec.
Availability
CS5207-2GT3 is available at Aetrix Electronics and suitable for Intel motherboard GTL termination, high-current point-of-load regulation, and industrial backplane power applications requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for CS5207-2GT3 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The CS5207-2GT3 belongs to onsemi's high-current linear regulator product line, engineered specifically for GTL/GTL+ bus termination and high-fidelity point-of-load regulation in computing infrastructure where precision, transient response, and fault resilience are non-negotiable.
FAQ
What is the maximum input voltage rating for the CS5207-2GT3?
The CS5207-2GT3 has an absolute maximum supply voltage (VCC) of 17 V. Operation above this level risks permanent damage. For reliable 7.0 A output at 1.5 V, typical VIN is 2.5–10 V to maintain adequate dropout margin while minimizing power dissipation - e.g., 3.0 V input yields ~10.5 W dissipation at full load.
Does the CS5207-2GT3 require an external output capacitor, and what type is recommended?
Yes, the CS5207-2GT3 requires an external output capacitor for stability. A 22 μF tantalum capacitor is the baseline recommendation per the datasheet; aluminum electrolytic types are acceptable but exhibit greater ESR variation at low temperatures. Ceramic capacitors alone are not recommended due to near-zero ESR causing instability - hybrid networks (tantalum + ceramic) improve transient response without compromising loop stability.
How is thermal management implemented in the CS5207-2GT3, and what heatsink performance is needed?
The CS5207-2GT3 features thermal shutdown at 150–180°C with 25°C hysteresis and has RΘJC = 1.6°C/W. To sustain 7.0 A at 1.5 V with 3.0 V input (10.5 W dissipation) at 70°C ambient, total RΘJA must be ≤23.8°C/W - requiring a heatsink with RΘSA ≤20°C/W plus thermal interface material, since RΘJC + RΘCS typically consumes ~3–5°C/W.
Can the CS5207-2GT3 be used without remote sensing, and how does conductor resistance affect regulation?
The CS5207-2GT3 is a three-terminal regulator with no remote sense pins, so conductor parasitic resistance directly impacts load regulation. Per the datasheet, load regulation is specified with Kelvin sensing 6.35 mm from the package bottom. Without careful layout (short, wide traces; star grounding), conductor resistance >10 mΩ can cause >70 mV output deviation at 7.0 A - violating the ±2.0% (±30 mV) accuracy spec at the load.
Is the metal tab of the CS5207-2GT3 electrically isolated, and what precautions apply?
No - the metal tab of the CS5207-2GT3 is internally connected to Pin 2 (VOUT). If the heatsink is grounded, electrical isolation (e.g., mica washer + thermal grease) is mandatory to prevent shorting the 1.5 V output to ground. Failure to isolate may cause immediate device failure or system malfunction. The tab must also be mechanically secured to ensure low-thermal-resistance contact.
CS5207-2GT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- 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):
- 1.65V @ 7A
- Current - Output:
- 7A
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-3
CS5207-2GT3 FAQ
1.How can I place an order for CS5207-2GT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5207-2GT3 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 CS5207-2GT3 reliable?
The price and inventory of CS5207-2GT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5207-2GT3 is usually 5 days.
3.What payment methods are accepted for CS5207-2GT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5207-2GT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5207-2GT3?
CS5207-2GT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5207-2GT3 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 CS5207-2GT3?
For technical support, including CS5207-2GT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5207-2GT3 requirements.
6.How does Aetrix verify that CS5207-2GT3 is sourced from the original manufacturer or authorized distributors?
All CS5207-2GT3 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 CS5207-2GT3 meets industry standards.
7.What is the process for return or replacement of CS5207-2GT3?
All CS5207-2GT3 units undergo pre-shipment inspection (PSI). If there is an issue with CS5207-2GT3, 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 CS5207-2GT3 part is unused and in its original packaging.
Return procedure for CS5207-2GT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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