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onsemi CS5253B-8GDP5G
- Part No.:
- CS5253B-8GDP5G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
CS5253B-8GDP5G.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
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Product details
Overview
CS5253B-8GDP5G from onsemi is a 3.0 A, 2.5 V fixed-output low-dropout linear regulator in D2PAK-5 package with dedicated remote-sense (VSENSE) pin, VPOWER dropout < 0.40 V @ 3.0 A, VCONTROL dropout < 1.05 V @ 3.0 A, and ±1.5% output voltage accuracy-designed for high-accuracy regulation at the load in graphics controller power supplies.
For engineers reviewing the CS5253B-8GDP5G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, remote-sense implementation guidance, and validated drop-in alternatives for VGA card 2.5 V rail design.
Technical Context
The CS5253B-8GDP5G employs a dual-supply architecture: VPOWER supplies the emitter-collector path of the PNP-NPN pass transistor, while VCONTROL independently powers the error amplifier and bias circuitry-enabling true low-dropout operation independent of control supply headroom. This separation allows VPOWER dropout as low as 0.05 V @ 100 mA and 0.40 V @ 3.0 A.
Its Kelvin-sense topology uses VSENSE as the positive input to the internal error amplifier, enabling regulation referenced directly at the load. Combined with fast transient response and integrated thermal shutdown (150°C activation, 25°C hysteresis), it delivers stable 2.5 V under dynamic load steps from 10 mA to 3.0 A with < 0.1% load regulation measured at VSENSE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±1.5% - ensures stable core supply for graphics controllers requiring tight tolerance at point-of-load. |
| VPOWER Dropout | < 0.40 V @ 3.0 A - minimizes power loss and heat generation when sourcing full rated current from low-input rails like +3.3 V. |
| VCONTROL Dropout | < 1.05 V @ 3.0 A - defines minimum control supply overhead needed to sustain regulation without foldback. |
| Load Regulation (remote sense) | < 0.3% - guarantees output stability across 10 mA–3.0 A load range when VSENSE is connected at load terminals. |
| Ripple Rejection | 60–80 dB @ 120 Hz - suppresses input ripple from upstream switching converters feeding the VPOWER/VCONTROL inputs. |
| Thermal Shutdown | 150°C activation with 25°C hysteresis - provides autonomous recovery after overtemperature fault without external intervention. |
| Current Limit | 3.1–4.0 A - protects against sustained overload while allowing brief inrush during system startup. |
Pinout & Package
The CS5253B-8GDP5G is housed in a thermally enhanced D2PAK-5 (Case 936AC) package with exposed tab electrically connected to VOUT, requiring electrical isolation if mounted to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VSENSE | Kelvin sense input | Connects directly to load-side VOUT to close feedback loop at point-of-load, eliminating IR drop error in PCB traces. |
| 2 - GND | Signal ground reference | Reference node for internal error amplifier and protection circuits; must be tied to local ground near regulator before routing to system ground. |
| 3 - VOUT | Regulated output | Emitter of pass transistor; delivers up to 3.0 A; tab is internally bonded to this pin-requires isolation when heatsinked. |
| 4 - VCONTROL | Control circuit supply | Powers internal bias, error amp, and drive circuitry; must exceed VOUT by ≥0.9 V (100 mA) to ≥1.05 V (3.0 A) to maintain regulation. |
| 5 - VPOWER | Power transistor collector supply | Supplies high-current path; voltage must exceed VOUT by ≥0.05 V (100 mA) to ≥0.40 V (3.0 A); primary source of conduction loss. |
Key Features
| Feature | Design Value |
|---|---|
| Remote voltage sensing | Enables sub-mV regulation accuracy at load by referencing feedback directly at point-of-use, not at regulator pins. |
| Dual independent supplies | Separates control logic (VCONTROL) and power path (VPOWER) to minimize dropout and optimize thermal distribution. |
| Fast transient response | Maintains < 1.5% output deviation during 10 mA → 3.0 A load steps at 15–80 A/s slew rates-critical for GPU burst loads. |
| Integrated protection | Combines current limiting, short-circuit foldback, and thermal shutdown with hysteresis-eliminates need for external fault management circuitry. |
| Low-output-capacitance operation | Stable with only 33 µF output capacitor (vs. 330 µF for CS5253-1), reducing BOM cost and board area without sacrificing DC accuracy. |
Applications
| VGA Graphics Controller Power | Industrial FPGA Core Supply |
|---|---|
Use Scenario: Providing clean, tightly regulated 2.5 V to GPU memory interface and core logic on legacy VGA cards with long PCB traces between regulator and load. IC Role / Device Role / Timing Role: Primary LDO delivering 3.0 A with remote sensing to compensate for trace resistance-induced voltage drop. Use Value: Maintains 2.5 V ±1.5% at GPU pins despite >100 mΩ total trace resistance, preventing timing violations and data corruption. | Use Scenario: Powering 2.5 V I/O banks of industrial-grade FPGAs in programmable logic controllers where ambient temperature swings from −20°C to +70°C occur. IC Role / Device Role / Timing Role: Fixed-output LDO with thermal hysteresis and wide junction temperature range (0–150°C) ensuring reliable operation under thermal stress. Use Value: Delivers stable 2.5 V across full temperature range with <0.5% drift, supporting consistent I/O timing margins without derating. |
| Medical Imaging Sensor Bias | Test Equipment Precision Reference |
Use Scenario: Supplying bias voltage to analog front-end sensors in portable ultrasound systems where EMI-sensitive signal chains require ultra-low noise. IC Role / Device Role / Timing Role: Low-noise (0.003% VOUT RMS), remote-sensed LDO minimizing supply-induced offset in differential ADC inputs. Use Value: Achieves <1 µV RMS noise contribution and <1 mV load regulation step error-preserving sensor SNR and dynamic range. | Use Scenario: Generating calibrated 2.5 V reference for multimeter and oscilloscope analog subsystems requiring long-term stability and minimal thermal drift. IC Role / Device Role / Timing Role: High-accuracy (±1.5%), thermally stable (0.5%/W thermal regulation) LDO used as precision voltage source. Use Value: Provides <0.02% line/load regulation and <0.5% temperature coefficient-meeting Class II metrology requirements without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM1085IMPX-2.5/NOPB | Single-supply PNP-based LDO; 3.0 A rating but no VSENSE pin; dropout 1.3 V @ 3.0 A; requires larger output capacitor (≥100 µF). | Lacks remote sensing-unsuitable for point-of-load regulation where trace resistance exceeds 20 mΩ. | Select only when layout constraints prevent Kelvin routing and load regulation tolerance >1% is acceptable. |
| TPS7A8300RGRT | Advanced PMOS LDO; 2.0 A max; 0.25 V dropout @ 2.0 A; integrated soft-start; no VSENSE but supports external feedback. | Lower current rating and no dedicated sense pin-requires external op-amp compensation for remote sensing. | Prefer for new designs needing lower quiescent current (<1 mA) and digital enable, but verify 2.0 A limit suffices for peak load. |
Compared with LM1085IMPX-2.5/NOPB and TPS7A8300RGRT, the CS5253B-8GDP5G uniquely combines 3.0 A capability, dedicated VSENSE, and sub-0.4 V VPOWER dropout-making it the only option that meets VGA graphics controller requirements without external sensing circuitry or derating.
Availability
CS5253B-8GDP5G is available at Aetrix Electronics and suitable for graphics controller power, industrial FPGA core supply, medical imaging sensor bias, and test equipment precision reference applications requiring stable component supply, long-lifecycle support, and Pb-free compliance.
Supply support for CS5253B-8GDP5G 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 delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud, medical, and edge applications.
The CS5253B-8GDP5G belongs to onsemi's high-current LDO family engineered specifically for remote-sense power delivery in graphics, computing, and instrumentation systems where point-of-load accuracy and thermal robustness are critical.
FAQ
What is the maximum junction temperature specification for the CS5253B-8GDP5G?
The CS5253B-8GDP5G has a maximum operating junction temperature of 150°C, at which its thermal shutdown circuit activates. The device includes 25°C hysteresis, allowing automatic recovery once die temperature falls below 125°C. This specification is guaranteed by design and confirmed via 100% functional testing per unit, making CS5253B-8GDP5G suitable for high-power-density applications such as graphics card VRMs where heatsinking is constrained.
Can the CS5253B-8GDP5G operate with only VPOWER connected and VCONTROL unconnected?
No-the CS5253B-8GDP5G requires both VCONTROL and VPOWER to be present and within specification for regulation. If only VPOWER is applied, the output remains off. If only VCONTROL is applied, output current is limited to ~3 mA until VPOWER reaches valid level. This sequencing behavior prevents unregulated turn-on and is inherent to the dual-supply architecture of the CS5253B-8GDP5G.
What is the minimum output capacitance required for stability of the CS5253B-8GDP5G?
The CS5253B-8GDP5G is stable with a minimum 33 µF output capacitor, as validated in Figure 5 of the datasheet. This value is significantly lower than the 330 µF required by the earlier CS5253-1 variant, achieved through internal compensation optimization. Using less than 33 µF risks instability, especially under high-current transients; ceramic or low-ESR tantalum types are recommended to meet the 0.01–0.1 Ω ESR stability window shown in Figure 15.
How does the VSENSE pin function in the CS5253B-8GDP5G, and what happens if it is left unconnected?
In the CS5253B-8GDP5G, the VSENSE pin serves as the positive input to the internal error amplifier, enabling true Kelvin sensing. If left unconnected, the device defaults to local regulation at the VOUT pin-degrading load regulation to >0.3% and introducing up to 100 mV error due to PCB trace resistance. For optimal performance, VSENSE must be routed separately to the load's positive terminal, with its return path tied to the same ground point as the load's negative terminal.
Is the CS5253B-8GDP5G pin-compatible with the EZ1582 regulator?
Yes-the CS5253B-8GDP5G is explicitly documented as a drop-in replacement for the EZ1582, sharing identical pinout (VSENSE, GND, VOUT, VCONTROL, VPOWER), package (D2PAK-5), and functional behavior. It improves upon the EZ1582 with tighter output tolerance (±1.5% vs. ±2%), lower VPOWER dropout, and enhanced thermal protection-requiring no PCB changes when upgrading existing designs using the EZ1582.
CS5253B-8GDP5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 13V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 3A
- Current - Output:
- 3A
- 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:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
CS5253B-8GDP5G FAQ
1.How can I place an order for CS5253B-8GDP5G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5253B-8GDP5G 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 CS5253B-8GDP5G reliable?
The price and inventory of CS5253B-8GDP5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5253B-8GDP5G is usually 5 days.
3.What payment methods are accepted for CS5253B-8GDP5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5253B-8GDP5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5253B-8GDP5G?
CS5253B-8GDP5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5253B-8GDP5G 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 CS5253B-8GDP5G?
For technical support, including CS5253B-8GDP5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5253B-8GDP5G requirements.
6.How does Aetrix verify that CS5253B-8GDP5G is sourced from the original manufacturer or authorized distributors?
All CS5253B-8GDP5G 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 CS5253B-8GDP5G meets industry standards.
7.What is the process for return or replacement of CS5253B-8GDP5G?
All CS5253B-8GDP5G units undergo pre-shipment inspection (PSI). If there is an issue with CS5253B-8GDP5G, 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 CS5253B-8GDP5G part is unused and in its original packaging.
Return procedure for CS5253B-8GDP5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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