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onsemi CS5253-1GDPR5
- Part No.:
- CS5253-1GDPR5
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
CS5253-1GDPR5.pdf
- Description:
- IC REG LINEAR ADJ LDO REGULATOR
- Quantity:
- Payment:
- Shipping:
Inventory:579
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Product details
Overview
CS5253-1GDPR5 from onsemi is a 3.0 A adjustable low-dropout linear regulator in D2PAK-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 range. It delivers precise regulation for graphics controller power supplies on VGA cards with <1.0 mV load regulation at 2.5 V/3.0 A.
For engineers reviewing the CS5253-1GDPR5 datasheet, pinout, applications, or equivalent options, key selection considerations include VPOWER dropout <0.40 V @ 3.0 A, VCONTROL dropout <1.05 V @ 3.0 A, 1.0% trimmed reference, thermal shutdown at 150°C, and remote-sense capability for load-point regulation.
Technical Context
The CS5253-1GDPR5 uses a PNP–NPN pass transistor pair with physically separated VPOWER (collector) and VCONTROL (base drive) inputs to minimize dropout and power dissipation. Its error amplifier compares a 1.250 V internal bandgap reference against the VSENSE–Adjust differential to regulate output.
Remote sensing is implemented via dedicated Kelvin-connected VSENSE pin tied directly to the load, decoupling regulation accuracy from PCB trace resistance. Transient response is enhanced by an external capacitor on the Adjust pin, and protection includes current limiting (3.1–4.0 A), short-circuit foldback (~3.5 A), and thermal shutdown with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.0 A continuous; supports high-current graphics controllers without derating at TJ ≤ 150°C. |
| VPOWER Dropout | <0.40 V @ 3.0 A; minimizes power loss when VPOWER supplies the pass transistor collector. |
| VCONTROL Dropout | <1.05 V @ 3.0 A; defines minimum control supply headroom needed for stable regulation. |
| Reference Voltage | 1.250 V ±1.0%; trimmed bandgap enables accurate adjustable output from 1.25 V to 5.0 V. |
| Load Regulation | <0.3% @ 10 mA–3.0 A with remote sense; ensures stable voltage at load despite current transients. |
| Ripple Rejection | 80 dB @ 120 Hz; suppresses input ripple without requiring ultra-low-ESR capacitors. |
| Thermal Shutdown | Activates at ~150°C junction temperature with 25°C hysteresis; enables automatic recovery after fault clearance. |
Pinout & Package
D2PAK-5 package (Case 936AC) with exposed tab electrically connected to VOUT; designed for high-power thermal dissipation using heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VSENSE | Kelvin sense input | Connects directly to load to enable remote-sense regulation; eliminates PCB trace IR drop errors. |
| 2 - Adjust | Reference bias node | Carries ~50 µA bias current; sets output voltage with R1/R2 divider and enables transient response tuning via bypass cap. |
| 3 - VOUT | Regulated output / tab connection | Supplies up to 3.0 A; tab must be thermally coupled to heatsink and electrically isolated if required. |
| 4 - VCONTROL | Control circuit supply | Provides bias for error amplifier and driver stage; requires ≥1.05 V above VOUT for full-load operation. |
| 5 - VPOWER | Power transistor collector | Delivers load current with minimal dropout; must be ≥0.40 V above VOUT at 3.0 A to maintain regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Remote voltage sensing | Enables sub-millivolt load regulation accuracy by measuring voltage directly at the load point. |
| Separate VPOWER/VCONTROL supplies | Reduces total power dissipation by isolating high-current path (VPOWER) from low-current control logic (VCONTROL). |
| Fast transient response | Tuned via Adjust pin capacitor; maintains tight output regulation during rapid load steps common in GPU power rails. |
| Thermal shutdown with hysteresis | Shuts down at ~150°C and re-enables only after cooling by ~25°C, preventing thermal cycling in overload conditions. |
| Backward compatibility | Supports 3-pin regulator footprints when VCONTROL and VPOWER are tied together, easing legacy design upgrades. |
Applications
| VGA Graphics Controller Power | High-Current FPGA Core Supply |
|---|---|
|
Use Scenario: Generating stable 2.5 V @ 3.0 A for graphics processing units on legacy VGA cards. IC Role / Device Role / Timing Role: Primary LDO regulator with remote sense ensuring voltage accuracy at GPU die. Use Value: Eliminates >100 mV output error caused by PCB trace resistance under full load, enabling reliable GPU operation. |
Use Scenario: Providing tightly regulated core voltage for high-speed FPGAs requiring fast load-step response. IC Role / Device Role / Timing Role: Adjustable LDO delivering programmable core voltage with sub-10 µs transient recovery. Use Value: Maintains FPGA timing margins during 0→3.0 A load transitions via fast loop response and low-noise output. |
| Industrial Motor Control Logic Supply | Medical Imaging Sensor Bias Rail |
|
Use Scenario: Powering microcontroller and gate-driver logic in motor drives subject to EMI and thermal stress. IC Role / Device Role / Timing Role: Robust LDO with overcurrent, short-circuit, and thermal protection for harsh environments. Use Value: Survives repeated short circuits and 150°C junction temperatures without latch-up or parameter drift. |
Use Scenario: Delivering ultra-stable analog bias voltage to precision ADC front-ends in MRI/X-ray detectors. IC Role / Device Role / Timing Role: Low-noise (0.003% VOUT RMS), high-accuracy regulator with remote sense at sensor node. Use Value: Limits output noise-induced quantization error and maintains ±0.1% voltage stability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1528CP#PBF | Higher dropout (0.7 V @ 3 A), no remote sense, 3-pin package; requires external compensation. | Lacks Kelvin sensing and separate VPOWER/VCONTROL; unsuitable for load-point regulation. | Select only if board space prohibits D2PAK-5 and remote sense is unnecessary. |
| TPS7A8300RGRT | Lower IOUT (2 A), integrated PMOS pass device, 1.1 V dropout @ 2 A; no VPOWER/VCONTROL separation. | Cannot match 3.0 A output or dual-supply efficiency; optimized for low-IQ portable systems. | Prefer for battery-powered designs where quiescent current matters more than peak current. |
Compared with LT1528CP#PBF and TPS7A8300RGRT, the CS5253-1GDPR5 uniquely combines 3.0 A output, true remote sensing, and dual-supply architecture-enabling higher efficiency and tighter regulation in high-power industrial and graphics applications where load-point accuracy is critical.
Availability
CS5253-1GDPR5 is available at Aetrix Electronics and suitable for VGA graphics power, FPGA core supply, and industrial motor control applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for CS5253-1GDPR5 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 connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The CS5253-1GDPR5 belongs to onsemi's high-current LDO regulator product line, engineered specifically for graphics, computing, and industrial systems demanding precise remote-sensed voltage regulation at up to 3.0 A.
FAQ
What is the maximum allowable voltage difference between VPOWER and VOUT for the CS5253-1GDPR5?
The absolute maximum rating for VPOWER − VOUT is 6.0 V. Exceeding this risks immediate pass transistor failure during short-circuit events before protection circuits activate. The CS5253-1GDPR5 must be used within this limit-even when VCONTROL and VPOWER are tied-to ensure safe operation and avoid destructive overvoltage stress on the internal PNP–NPN pair.
Can the CS5253-1GDPR5 operate with only VCONTROL connected and VPOWER unconnected?
Yes-the CS5253-1GDPR5 can supply up to 50 mA when only VCONTROL is powered and VPOWER is left open. This mode is useful for low-current biasing or diagnostics but cannot deliver its rated 3.0 A output. Full 3.0 A operation requires both VCONTROL ≥ (VOUT + 1.05 V) and VPOWER ≥ (VOUT + 0.40 V) simultaneously.
How does the remote sensing feature of the CS5253-1GDPR5 improve regulation accuracy?
The CS5253-1GDPR5 uses the dedicated VSENSE pin to close the feedback loop directly at the load, bypassing PCB trace resistance. This reduces load-regulation error to <1.0 mV at 2.5 V/3.0 A-versus typical 50–100 mV errors in non-sensing LDOs-ensuring the voltage delivered to the IC load matches the setpoint regardless of board layout or current magnitude.
What is the purpose of the Adjust pin capacitor in the CS5253-1GDPR5 circuit?
A small capacitor (e.g., 0.1 µF tantalum) from Adjust to ground improves transient response and ripple rejection by stabilizing the reference bias node and damping high-frequency error amplifier oscillations. It does not affect DC output voltage setting but significantly reduces output voltage deviation during rapid load steps-critical for GPU and FPGA power integrity.
Does the CS5253-1GDPR5 require an external diode for reverse-current protection?
No external diode is required under normal operation because the CS5253-1GDPR5's internal discharge path handles typical output capacitor discharge. However, if VCONTROL is instantaneously shorted while large output capacitance (>1000 µF) and high VOUT (>3.3 V) are present, calculated discharge current may exceed the 3.5 A short-circuit rating-making a series diode on VOUT advisable per Figure 21 in the datasheet.
CS5253-1GDPR5 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 13V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5V
- 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
CS5253-1GDPR5 FAQ
1.How can I place an order for CS5253-1GDPR5 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5253-1GDPR5 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 CS5253-1GDPR5 reliable?
The price and inventory of CS5253-1GDPR5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5253-1GDPR5 is usually 5 days.
3.What payment methods are accepted for CS5253-1GDPR5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5253-1GDPR5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5253-1GDPR5?
CS5253-1GDPR5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5253-1GDPR5 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 CS5253-1GDPR5?
For technical support, including CS5253-1GDPR5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5253-1GDPR5 requirements.
6.How does Aetrix verify that CS5253-1GDPR5 is sourced from the original manufacturer or authorized distributors?
All CS5253-1GDPR5 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 CS5253-1GDPR5 meets industry standards.
7.What is the process for return or replacement of CS5253-1GDPR5?
All CS5253-1GDPR5 units undergo pre-shipment inspection (PSI). If there is an issue with CS5253-1GDPR5, 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 CS5253-1GDPR5 part is unused and in its original packaging.
Return procedure for CS5253-1GDPR5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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