My Inquiry
My Account
onsemi CS5258-1GT5
- Part No.:
- CS5258-1GT5
- Manufacturer:
- onsemi
- Package:
- TO-220-5
- Datasheet:
-
CS5258-1GT5.pdf
- Description:
- IC REG LINEAR POS ADJ 8A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,179
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CS5258-1GT5 from onsemi is an 8.0 A adjustable low-dropout linear regulator in a TO-220-5 package, featuring dual-supply architecture (VPOWER and VCONTROL), remote voltage sensing via dedicated VSENSE pin, and 1.25 V to 5.0 V output programmability. It delivers stable 2.5 V @ 8.0 A for microprocessor secondary power rails on motherboards with existing 3.3 V/5.0 V supplies.
For engineers reviewing the CS5258-1GT5 datasheet, pinout, applications, or equivalent options, key selection criteria include VPOWER dropout < 0.4 V @ 8.0 A, VCONTROL dropout < 1.15 V @ 8.0 A, 1.5% trimmed reference, remote-sense accuracy (1.0 mV load regulation), and thermal shutdown at 150°C with 25°C hysteresis.
Technical Context
The CS5258-1GT5 employs a PNP-NPN pass transistor pair with physically separated VPOWER (collector) and VCONTROL (control circuit supply) inputs to minimize dropout and internal dissipation. Its error amplifier uses Kelvin-connected VSENSE to regulate voltage directly at the load, eliminating IR drop errors.
Control logic ensures safe startup sequencing: output remains disabled until both VCONTROL and VPOWER are valid; if VCONTROL rises first, output current is limited to ~3 mA until VPOWER reaches regulation threshold. Internal protection includes foldback current limiting (6.0–9.0 A short-circuit current), thermal shutdown with hysteresis, and overcurrent/short-circuit latching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8.0 A continuous; supports high-current microprocessor core/logic rails without derating at TJ ≤ 150°C. |
| VPOWER Dropout | < 0.4 V @ 8.0 A; enables efficient operation from low-input-voltage sources like 3.3 V rails. |
| VCONTROL Dropout | < 1.15 V @ 8.0 A; defines minimum control supply headroom needed for regulation stability. |
| Reference Voltage | 1.253 V ±1.5%; trimmed bandgap reference enabling precise output setting via R1/R2 divider. |
| Load Regulation | 0.04% typical (10 mA → 8.0 A); measured at VSENSE pin, ensuring <1.0 mV error at 2.5 V output. |
| Ripple Rejection | 80 dB @ 120 Hz; suppresses input ripple from switching pre-regulators feeding VPOWER/VCONTROL. |
| Thermal Shutdown | Activates at TJ ≈ 150°C with 25°C hysteresis; self-recovering protection prevents latch-up during transient overloads. |
Pinout & Package
CS5258-1GT5 is supplied in a TO-220-5 (Case 314D) package with tab connected to VOUT. The thermally enhanced metal tab enables direct heatsink mounting for high-power dissipation management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VSENSE | Kelvin sense input | Connects to load-side output node to enable remote-sense regulation; eliminates PCB trace resistance impact on accuracy. |
| 2. Adjust | Reference bias node | Carries ~50 μA bias current; sets output voltage with R1/R2 divider; bypass capacitor here improves transient response. |
| 3. VOUT | Regulated output emitter | Tab-connected output terminal sourcing up to 8.0 A; requires isolated heatsink if chassis ground referenced. |
| 4. VCONTROL | Control circuit supply | Powers internal error amplifier and bias circuits; must exceed VOUT by ≥1.0 V (up to 13 V max). |
| 5. VPOWER | Power transistor collector | Primary current path for 8.0 A load; dropout defined as VPOWER − VOUT; max differential = 6.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply inputs | VPOWER handles high-current conduction while VCONTROL powers precision control circuitry-enabling <0.4 V dropout at full load. |
| True Kelvin remote sensing | VSENSE pin referenced directly to load point reduces output error from PCB resistance to <1.0 mV under 8.0 A step. |
| Fast transient loop response | Capable of maintaining regulation during microprocessor load transients; enhanced by optional 0.1 μF capacitor on Adjust pin. |
| Integrated fault protection | Combines current limiting (8.1–10 A), short-circuit foldback (6–9 A), thermal shutdown (150°C), and supply sequencing control. |
| Backward compatibility | Pin-compatible replacement for legacy 3-pin regulators when VCONTROL and VPOWER are tied together (single-supply mode). |
Applications
| Server Motherboard Secondary Power | High-Performance FPGA Core Supply |
|---|---|
|
Use Scenario: Generating 2.5 V @ 8.0 A for CPU I/O or memory interface rails on ATX server boards where 3.3 V and 5.0 V are already available. IC Role / Device Role / Timing Role: Adjustable LDO regulator providing tightly regulated, low-noise secondary voltage with remote sensing at DIMM slots or CPU socket. Use Value: Eliminates 10–20 mV IR drop across motherboard traces, ensuring stable voltage at the load under dynamic 8.0 A steps. |
Use Scenario: Powering 2.0–2.5 V core rails for large-scale FPGAs requiring fast transient response and minimal output deviation. IC Role / Device Role / Timing Role: High-current linear regulator delivering clean, sequenced power with integrated thermal/current protection during configuration and runtime. Use Value: Maintains <±0.5% output accuracy across temperature and load, preventing FPGA configuration failure or timing violations. |
| Industrial PLC CPU Module | Medical Imaging Subsystem Power |
|
Use Scenario: Providing isolated 2.5 V logic supply in ruggedized programmable logic controller modules operating in 0–70°C ambient. IC Role / Device Role / Timing Role: Robust LDO with thermal hysteresis and overcurrent protection serving as primary logic rail for ARM-based PLC processors. Use Value: Self-recovering thermal shutdown prevents system lockup during extended high-load operation in enclosed enclosures. |
Use Scenario: Delivering ultra-stable 2.5 V analog supply for ADC front-ends and sensor interfaces in portable ultrasound or MRI subsystems. IC Role / Device Role / Timing Role: Low-noise (<0.003% RMS), low-drift LDO supplying precision analog circuitry with remote sensing at signal chain inputs. Use Value: 0.5% temperature stability and <1.0 mV load regulation preserve SNR and measurement accuracy across clinical operating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable high-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1585A-2.5#PBF | Fixed 2.5 V output; 4.5 A max; TO-220-3 package; no VSENSE or dual-supply architecture. | Limited to fixed-output use cases; lacks remote sensing and >5 A capability required for modern microprocessors. | Select only for cost-sensitive, lower-current designs where output voltage is invariant and PCB layout allows local regulation. |
| TPS75733KTTT | 3.3 V fixed output; 3 A max; thermal foldback; no VSENSE; QFN-20 package. | Not adjustable; insufficient current rating; surface-mount only; incompatible with TO-220 heatsinking requirements. | Use only in space-constrained, lower-power embedded systems where 3.3 V fixed output suffices and thermal design permits QFN mounting. |
Compared with LT1585A-2.5#PBF and TPS75733KTTT, the CS5258-1GT5 uniquely supports 8.0 A adjustable outputs with remote sensing and dual-supply optimization-making it the only viable choice for motherboard-level secondary regulation where precision, current, and thermal robustness are co-required.
Availability
CS5258-1GT5 is available at Aetrix Electronics and suitable for server motherboard power delivery, FPGA core supply, and industrial PLC CPU module applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CS5258-1GT5 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, sensors, and logic solutions for automotive, industrial, cloud computing, and medical markets.
The CS5258-1GT5 belongs to onsemi's high-current LDO regulator product line, engineered specifically for next-generation microprocessor secondary power rails where ultra-low dropout, remote sensing, and robust fault protection are mandatory.
FAQ
What is the maximum allowable voltage difference between VPOWER and VOUT for the CS5258-1GT5?
The CS5258-1GT5 has an absolute maximum rating of 6.0 V for the VPOWER − VOUT differential. Exceeding this risks immediate pass transistor failure during short-circuit events, as overvoltage stress occurs before overcurrent or thermal protection can activate. This limit applies regardless of VCONTROL voltage or load condition, and must be enforced externally via clamping circuitry if system design permits higher differentials.
How does the CS5258-1GT5 handle power supply sequencing between VCONTROL and VPOWER?
The CS5258-1GT5 enforces strict sequencing: output remains disabled until both VCONTROL and VPOWER are valid. If VCONTROL rises first, output current is limited to ~3 mA until VPOWER reaches regulation threshold. If VPOWER rises first, no output is enabled until VCONTROL is applied. This prevents unregulated turn-on and ensures safe startup in multi-rail systems.
Can the CS5258-1GT5 be used with only one input supply instead of separate VCONTROL and VPOWER connections?
Yes-the CS5258-1GT5 supports single-supply operation by tying VCONTROL and VPOWER together. In this mode, dropout is determined by the minimum VCONTROL − VOUT differential (≤1.15 V @ 8.0 A), and the device retains full functionality including remote sensing and protection features. This configuration maintains backward compatibility with traditional 3-pin regulator footprints.
What is the purpose of the VSENSE pin on the CS5258-1GT5, and how should it be connected?
The VSENSE pin enables true Kelvin remote sensing by connecting directly to the load-side output node-bypassing PCB trace resistance between the regulator and load. This ensures regulation accuracy is maintained at the point of use. For optimal performance, VSENSE must be routed as a dedicated pair (separate from power traces) and tied to the load's high-side return point, not to the VOUT pin itself.
Does the CS5258-1GT5 require an external capacitor on the Adjust pin, and what effect does it have?
An external capacitor (e.g., 0.1 μF tantalum) from Adjust to ground is optional but recommended to improve transient response and ripple rejection. It stabilizes the reference bias node during rapid load changes and attenuates high-frequency noise coupling into the feedback path. While not mandatory for basic regulation, omitting it degrades dynamic performance-particularly critical in microprocessor and FPGA applications with fast current slew rates.
CS5258-1GT5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 13V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 1.3V @ 8A
- Current - Output:
- 8A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
CS5258-1GT5 FAQ
1.How can I place an order for CS5258-1GT5 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5258-1GT5 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 CS5258-1GT5 reliable?
The price and inventory of CS5258-1GT5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5258-1GT5 is usually 5 days.
3.What payment methods are accepted for CS5258-1GT5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5258-1GT5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5258-1GT5?
CS5258-1GT5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5258-1GT5 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 CS5258-1GT5?
For technical support, including CS5258-1GT5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5258-1GT5 requirements.
6.How does Aetrix verify that CS5258-1GT5 is sourced from the original manufacturer or authorized distributors?
All CS5258-1GT5 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 CS5258-1GT5 meets industry standards.
7.What is the process for return or replacement of CS5258-1GT5?
All CS5258-1GT5 units undergo pre-shipment inspection (PSI). If there is an issue with CS5258-1GT5, 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 CS5258-1GT5 part is unused and in its original packaging.
Return procedure for CS5258-1GT5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CS5258-1GT5 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
