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onsemi CS5253B-8GDP5
- Part No.:
- CS5253B-8GDP5
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
CS5253B-8GDP5.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
CS5253B-8GDP5 from onsemi is a 3.0 A, 2.5 V fixed-output low-dropout linear regulator in D2PAK-5 package with remote sense capability, 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-8GDP5 datasheet, pinout, applications, or equivalent options, key selection considerations include remote-sense implementation, dual-supply (VPOWER/VCONTROL) architecture, thermal shutdown at 150°C, current limit of 3.1–4.0 A, and compatibility with low-ESR ceramic output capacitors as low as 33 µF.
Technical Context
The CS5253B-8GDP5 employs a dual-input architecture: VPOWER supplies the emitter-collector path of the PNP-NPN pass transistor, while VCONTROL independently powers the error amplifier and bias circuitry - enabling ultra-low dropout and eliminating supply sequencing risks. It delivers regulated 2.5 V output with Kelvin sensing via dedicated VSENSE pin to reject IR drop in PCB traces.
Its internal protection includes foldback current limiting (short-circuit current ~2.0–3.5 A), thermal shutdown with 25°C hysteresis, and overtemperature self-recovery. Load regulation at the sense point is < 0.3% across 10 mA–3.0 A, and ripple rejection reaches 80 dB at 120 Hz with 3.0 A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±1.5% - ensures stable core supply for VGA graphics controllers within tight tolerance. |
| VPOWER Dropout | < 0.40 V @ 3.0 A - minimizes power loss and heat generation when sourcing full rated current. |
| VCONTROL Dropout | < 1.05 V @ 3.0 A - enables use with lower-control-rail supplies while maintaining regulation margin. |
| Load Regulation | < 0.3% @ 10 mA–3.0 A with remote sense - maintains output accuracy directly at load under dynamic current steps. |
| Ripple Rejection | 80 dB @ 120 Hz, 1.0 VP-P, 3.0 A - suppresses input ripple from upstream switching regulators feeding the LDO. |
| Thermal Shutdown | Activates at ~150°C junction temperature with 25°C hysteresis - provides autonomous recovery after overheating events. |
| Current Limit | 3.1–4.0 A - protects against sustained overload while supporting peak GPU core currents. |
Pinout & Package
D2PAK-5 package (Case 936AC) with exposed tab electrically connected to VOUT; requires heatsinking due to RJC = 2.5°C/W and high-power operation up to 3.0 A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VSENSE | Kelvin sense input | Connects directly to load VDD node to enable remote feedback - eliminates trace resistance error in output regulation. |
| 2. GND | Signal ground reference | Reference point for error amplifier and internal bias; must be tied near local decoupling caps before routing to system ground. |
| 3. VOUT | Regulated output / power delivery | Emitter of pass transistor; tab-connected to this pin - requires isolation if heatsink is grounded. |
| 4. VCONTROL | Control circuit supply | Powers internal error amp and drive circuitry; must exceed VOUT by ≥0.9 V to maintain regulation at full load. |
| 5. VPOWER | Power transistor collector supply | Supplies high-current path; voltage must exceed VOUT by ≥0.05 V (min) to 0.60 V (max) depending on load. |
Key Features
| Feature | Design Value |
|---|---|
| Remote voltage sensing | Enables <1.0 mV load-regulation error at 2.5 V output by measuring voltage directly at load terminals. |
| Dual independent supplies | VPOWER and VCONTROL pins allow optimized thermal partitioning - reduces die self-heating vs single-supply LDOs. |
| Low-ESR capacitor support | Stable with 33 µF ceramic output cap - lowers BOM cost and board space vs traditional 330 µF electrolytic solutions. |
| Fast transient response | Optimized loop for rapid recovery from 10 mA ↔ 3.0 A load steps - critical for GPU burst-mode operation. |
| Backward compatibility | Pin-compatible with standard 3-pin regulators when VCONTROL and VPOWER are shorted - simplifies legacy upgrades. |
Applications
| Graphics Card Core Supply | VGA Controller Power |
|---|---|
Use Scenario: Providing clean, tightly regulated 2.5 V to GPU memory interface or core logic on discrete VGA cards. IC Role / Device Role / Timing Role: Primary low-noise, high-current DC-DC post-regulator with remote sense for load-point accuracy. Use Value: Eliminates >100 mV output droop under 3.0 A load transients - prevents timing violations in high-speed memory buses. | Use Scenario: Powering analog front-end and DAC circuitry in legacy VGA signal generators. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable reference voltage for video DACs and sync generators. Use Value: 0.003% RMS output noise ensures <1 LSB error in 10-bit video DAC outputs. |
| Industrial Display Backlight Control | Embedded Graphics Module Supply |
Use Scenario: Regulating 2.5 V rail for LED driver ICs and gamma-correction DACs in panel control boards. IC Role / Device Role / Timing Role: Precision voltage source with thermal foldback to sustain operation during ambient temperature spikes. Use Value: Thermal hysteresis enables automatic recovery after 150°C shutdown - avoids system reset in sealed enclosures. | Use Scenario: Powering integrated graphics processors in fanless industrial PCs and HMIs. IC Role / Device Role / Timing Role: High-current LDO with remote sense to compensate for long PCB traces between regulator and SoC power pins. Use Value: Maintains ±1.5% output accuracy at SoC VDD pin despite 50 mΩ trace resistance - guarantees reliable boot and operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2940CT-2.5/NOPB | Single-supply, 1.0 A max, 0.5 V dropout @ 1 A, no remote sense, TO-220 package | Limited to lower-current, non-remote-sense applications; lacks dual-supply architecture and fast transient response | Select only for cost-sensitive, low-power designs where 3.0 A capacity and Kelvin sensing are unnecessary |
| TPS7A8300RGRT | Single-supply, 3.0 A, 0.8 V dropout @ 3 A, remote sense, 20-pin QFN, integrated soft-start | Higher integration, smaller footprint, but requires external compensation and has different thermal profile | Prefer for space-constrained, thermally managed layouts where D2PAK mounting is impractical |
Compared with LM2940CT-2.5/NOPB and TPS7A8300RGRT, the CS5253B-8GDP5 uniquely combines D2PAK ruggedness, dual-supply efficiency, and proven remote-sense stability for high-current graphics applications - without requiring complex compensation or layout constraints.
Availability
CS5253B-8GDP5 is available at Aetrix Electronics and suitable for graphics controller power, industrial display systems, and embedded GPU modules requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.
Supply support for CS5253B-8GDP5 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-8GDP5 belongs to onsemi's high-current linear regulator product line, engineered specifically for graphics subsystems and remote-sense precision power delivery in space- and thermal-constrained environments.
FAQ
What is the minimum required input voltage difference for CS5253B-8GDP5 to regulate at 3.0 A?
The CS5253B-8GDP5 requires either VPOWER ≥ VOUT + 0.40 V or VCONTROL ≥ VOUT + 1.05 V to maintain regulation at 3.0 A load. The actual dropout is determined by whichever supply (VPOWER or VCONTROL) presents the larger differential - ensuring stable 2.5 V output even with marginal input rails.
Can CS5253B-8GDP5 operate with only VPOWER connected and VCONTROL floating?
No - CS5253B-8GDP5 will not regulate if VCONTROL is unconnected. With only VPOWER applied, output current is limited to ≤1.0 mA. Both VPOWER and VCONTROL must be powered within their specified ranges (VPOWER: 3.13–6.0 V; VCONTROL: 3.9–13 V) for full 3.0 A operation and regulation.
How does the remote sense feature of CS5253B-8GDP5 improve regulation accuracy?
The CS5253B-8GDP5 uses dedicated VSENSE pin to sample voltage directly at the load, bypassing PCB trace resistance. This achieves <0.3% load regulation at the sense point - compared to >1% error typical with local sensing - ensuring 2.5 V ±1.5% is maintained precisely where the graphics IC consumes power.
What thermal management is required for CS5253B-8GDP5 at full 3.0 A load?
At 3.0 A with 0.40 V dropout, CS5253B-8GDP5 dissipates up to 1.2 W. With RJC = 2.5°C/W, a heatsink with RSA ≤ 30°C/W is recommended to keep junction temperature below 150°C in 70°C ambient - using thermal compound and isolated mounting due to VOUT-connected tab.
Is CS5253B-8GDP5 compatible with ceramic output capacitors?
Yes - CS5253B-8GDP5 is stable with low-ESR ceramic capacitors as small as 33 µF, unlike older LDOs requiring 330 µF electrolytics. This reduces board area, improves reliability, and supports fast transient response - confirmed in Figure 5 and Application Note design guidelines.
CS5253B-8GDP5 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-8GDP5 FAQ
1.How can I place an order for CS5253B-8GDP5 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5253B-8GDP5 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-8GDP5 reliable?
The price and inventory of CS5253B-8GDP5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5253B-8GDP5 is usually 5 days.
3.What payment methods are accepted for CS5253B-8GDP5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5253B-8GDP5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5253B-8GDP5?
CS5253B-8GDP5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5253B-8GDP5 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-8GDP5?
For technical support, including CS5253B-8GDP5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5253B-8GDP5 requirements.
6.How does Aetrix verify that CS5253B-8GDP5 is sourced from the original manufacturer or authorized distributors?
All CS5253B-8GDP5 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-8GDP5 meets industry standards.
7.What is the process for return or replacement of CS5253B-8GDP5?
All CS5253B-8GDP5 units undergo pre-shipment inspection (PSI). If there is an issue with CS5253B-8GDP5, 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-8GDP5 part is unused and in its original packaging.
Return procedure for CS5253B-8GDP5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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