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onsemi CS5253B-8GDPR5
- Part No.:
- CS5253B-8GDPR5
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
CS5253B-8GDPR5.pdf
- Description:
- IC REG LINEAR 2.5V 3A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
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Product details
Overview
CS5253B-8GDPR5 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 stable 2.5 V supply generation in graphics controller power stages on VGA cards.
For engineers reviewing the CS5253B-8GDPR5 datasheet, pinout, applications, or equivalent options, key selection considerations include remote-sense-enabled load regulation (< 1.0 mV at 10 mA–3.0 A step), dual-supply architecture (VPOWER + VCONTROL), thermal shutdown (150°C activation), current limiting (3.1–4.0 A), and compatibility with low-ESR ceramic output capacitors (≥33 µF).
Technical Context
The CS5253B-8GDPR5 implements a dual-rail architecture where VPOWER supplies the emitter-collector path of the internal PNP-NPN pass transistor while VCONTROL powers the error amplifier and bias circuitry - enabling independent optimization of power efficiency and control stability. This separation allows sub-0.4 V dropout at full 3.0 A load when VPOWER is used as the primary input.
Its dedicated VSENSE pin enables true Kelvin sensing at the load, decoupling regulation from PCB trace resistance; internal protection includes foldback current limiting (short-circuit current ~2.0–3.5 A), thermal shutdown with 25°C hysteresis, and ripple rejection >60 dB at 120 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±1.5% - tightly trimmed reference ensures stable core voltage for graphics controllers without external feedback tuning. |
| VPOWER Dropout | < 0.40 V @ 3.0 A - minimizes power loss and heat generation when sourcing full rated current from a 3.3 V rail. |
| VCONTROL Dropout | < 1.05 V @ 3.0 A - defines minimum headroom required between VCONTROL and VOUT to sustain regulation under full load. |
| Load Regulation | < 0.3% (10 mA–3.0 A, remote sense) - maintains output accuracy across dynamic GPU load transients without local sense error. |
| Ripple Rejection | 60–80 dB @ 120 Hz - suppresses input ripple from upstream switching converters, critical for noise-sensitive analog pixel drivers. |
| Thermal Shutdown | 150°C activation with 25°C hysteresis - provides autonomous recovery after overtemperature fault without system-level intervention. |
| Current Limit | 3.1–4.0 A - protects against sustained overload while allowing brief inrush during GPU initialization. |
Pinout & Package
D2PAK-5 package (Case 936AC) with exposed thermal tab electrically connected to VOUT; requires heatsink mounting and electrical isolation if VOUT is not ground-referenced.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VSENSE | Kelvin sense input | Connects directly to load-side VOUT to eliminate IR drop error; internally ties to error amplifier's non-inverting input. |
| 2 - GND | Signal ground reference | Reference node for control circuitry; must be routed near local input caps before connecting remotely to load ground. |
| 3 - VOUT | Regulated output | Emitter of pass transistor; delivers up to 3.0 A; tab is electrically tied to this pin - isolation required if mounting to heatsink. |
| 4 - VCONTROL | Control supply input | Powers internal bias, error amp, and drive circuitry; must exceed VOUT by ≥0.9 V (min) to regulate at full load. |
| 5 - VPOWER | Power supply input | Collector of pass transistor; carries full 3.0 A load current; dropout defined relative to VOUT (e.g., 0.40 V @ 3.0 A). |
Key Features
| Feature | Design Value |
|---|---|
| Remote voltage sensing | Enables direct load-point regulation with <1.0 mV error over 10 mA–3.0 A step - eliminates PCB trace resistance impact on output accuracy. |
| Dual-supply architecture | Separates VPOWER (high-current path) and VCONTROL (low-noise control logic) to optimize efficiency and transient response independently. |
| Fast transient loop response | Stabilizes within microseconds after load steps - verified via comparison to CS5253-1 with reduced COUT (33 µF vs 330 µF). |
| Thermal shutdown with hysteresis | Shuts down at ~150°C junction temperature and re-enables only after cooling to ~125°C - prevents thermal cycling damage during sustained overload. |
| Backward compatibility | Pin-compatible with standard 3-pin regulators in single-supply mode (VCONTROL = VPOWER), easing legacy design upgrades. |
Applications
| VGA Graphics Controller Power | High-Current FPGA Core Supply |
|---|---|
Use Scenario: Providing clean 2.5 V to GPU memory interface and pixel engine on legacy VGA add-in cards with high dynamic current demand (10 mA–3.0 A). IC Role / Device Role / Timing Role: Primary LDO regulator delivering regulated core voltage with remote sense correction to compensate for PCB voltage drop under fast load transients. Use Value: Eliminates need for expensive bulk capacitance near GPU die - achieves <0.3% load regulation using only 33 µF local output cap and remote Kelvin routing. | Use Scenario: Powering 2.5 V I/O banks or configuration logic in industrial FPGAs requiring stable voltage despite board-level IR drop and ambient temperature variation (0–120°C). IC Role / Device Role / Timing Role: Fixed-output LDO with thermal foldback and current limit, deployed where programmable supplies are unavailable or cost-prohibitive. Use Value: Delivers guaranteed 3.0 A with <1.05 V VCONTROL dropout - enables use of lower-cost 3.3 V intermediate rail instead of 5 V, reducing system power loss by >1.5 W at full load. |
| PCI Add-In Card Power Management | Industrial Display Backlight Driver Bias |
Use Scenario: Regulating 2.5 V for PCI slot-based video capture or frame grabber modules operating in convection-cooled enclosures with limited airflow. IC Role / Device Role / Timing Role: High-current LDO with integrated thermal protection and remote sense, replacing discrete MOSFET+op-amp solutions. Use Value: Built-in short-circuit foldback (2.0–3.5 A) and 25°C thermal hysteresis prevent latch-up during connector hot-plug events or ESD-induced faults. | Use Scenario: Generating precision 2.5 V bias for analog front-end circuits in medical or test equipment displays where ripple-induced image noise must be minimized. IC Role / Device Role / Timing Role: Low-noise linear regulator with 60–80 dB ripple rejection at 120 Hz, placed downstream of SMPS to clean switching artifacts. Use Value: RMS output noise <0.003% VOUT (10 Hz–10 kHz) ensures no visible banding or flicker in high-resolution LCD panels driven by analog gamma correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1582CS8#PBF | Pin-compatible drop-in replacement per onsemi documentation; same 2.5 V output, 3 A rating, and D2PAK-5 package but lacks dedicated VSENSE pin - relies on local sensing only. | No remote sense capability limits load regulation accuracy to ~10× worse (>10 mV error) under high-current PCB traces. | Select only if remote sensing is unnecessary and layout constraints prohibit adding VSENSE routing. |
| TPS7A8300RGRT | 3 A, 2.5 V adjustable LDO in 20-pin VQFN; supports remote sense but requires external resistor divider and has higher quiescent current (≈2.5 mA vs ≈7 mA). | Requires PCB redesign (QFN footprint, more pins); offers better PSRR (>70 dB up to 1 MHz) but lacks VPOWER/VCONTROL separation. | Prefer for new designs needing ultra-low noise and high-frequency ripple rejection - not suitable for drop-in replacement. |
Compared with LT1582CS8#PBF, CS5253B-8GDPR5 delivers superior load regulation via VSENSE; compared with TPS7A8300RGRT, it avoids layout redesign and supports simpler dual-rail supply partitioning - making CS5253B-8GDPR5 optimal for cost-sensitive, space-constrained VGA and PCI add-in card upgrades.
Availability
CS5253B-8GDPR5 is available at Aetrix Electronics and suitable for VGA graphics controller power, PCI add-in card voltage regulation, and industrial FPGA I/O supply applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for CS5253B-8GDPR5 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 CS5253B-8GDPR5 belongs to onsemi's high-current LDO regulator product line, engineered specifically for graphics, display, and high-power digital logic applications demanding precise remote-sensed voltage regulation with minimal external components.
FAQ
What is the maximum continuous output current supported by the CS5253B-8GDPR5?
The CS5253B-8GDPR5 is rated for continuous output current up to 3.0 A under specified thermal conditions (TJ ≤ 150°C, proper heatsinking). Its current limit is guaranteed between 3.1 A and 4.0 A, with short-circuit current clamped to 2.0–3.5 A. Actual achievable current depends on VPOWER–VOUT headroom, ambient temperature, and heatsink thermal resistance - RJC is 2.5°C/W for the D2PAK-5 package.
Does the CS5253B-8GDPR5 require an external capacitor on the VCONTROL pin?
No, the CS5253B-8GDPR5 does not require an external capacitor on the VCONTROL pin. The control circuitry is internally compensated; however, a 10 µF input capacitor on VCONTROL (as shown in Figure 1) is recommended to suppress noise and ensure stable operation during fast load transients. This capacitor should be placed close to the VCONTROL and GND pins.
Can the CS5253B-8GDPR5 operate with only VPOWER connected and VCONTROL floating?
No - the CS5253B-8GDPR5 will not regulate if VCONTROL is unconnected or floating. Both VPOWER and VCONTROL must be present and within specification (VCONTROL ≥ VOUT + 0.9 V, VPOWER ≥ VOUT + 0.1 V) for output enablement. With VCONTROL disconnected, the device draws only ≤1.0 mA from VPOWER and delivers no regulated output - this behavior prevents unregulated turn-on during supply sequencing.
What is the purpose of the VSENSE pin on the CS5253B-8GDPR5, and how should it be routed?
The VSENSE pin on the CS5253B-8GDPR5 enables Kelvin (4-wire) sensing by connecting directly to the load-side VOUT node - bypassing PCB trace resistance between the regulator and load. It must be routed as a dedicated pair (VSENSE and GND sense) away from noisy power paths, with both sense lines terminating at the load's power/ground entry point. Do not tie VSENSE to the regulator's local VOUT pad.
Is the CS5253B-8GDPR5 RoHS-compliant and Pb-free?
Yes, the CS5253B-8GDPR5 is Pb-free and RoHS-compliant, as confirmed by its "G" suffix (CS5253B−8GDPR5G is the explicit Pb-free ordering part number) and onsemi's Pb-Free Packaging documentation. The device uses matte tin lead finish and conforms to JEDEC J-STD-020 moisture sensitivity level 3, with peak reflow temperature of 230°C.
CS5253B-8GDPR5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-8GDPR5 FAQ
1.How can I place an order for CS5253B-8GDPR5 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5253B-8GDPR5 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-8GDPR5 reliable?
The price and inventory of CS5253B-8GDPR5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5253B-8GDPR5 is usually 5 days.
3.What payment methods are accepted for CS5253B-8GDPR5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5253B-8GDPR5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5253B-8GDPR5?
CS5253B-8GDPR5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5253B-8GDPR5 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-8GDPR5?
For technical support, including CS5253B-8GDPR5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5253B-8GDPR5 requirements.
6.How does Aetrix verify that CS5253B-8GDPR5 is sourced from the original manufacturer or authorized distributors?
All CS5253B-8GDPR5 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-8GDPR5 meets industry standards.
7.What is the process for return or replacement of CS5253B-8GDPR5?
All CS5253B-8GDPR5 units undergo pre-shipment inspection (PSI). If there is an issue with CS5253B-8GDPR5, 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-8GDPR5 part is unused and in its original packaging.
Return procedure for CS5253B-8GDPR5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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