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STMicroelectronics ST1L02PU25R
- Part No.:
- ST1L02PU25R
- Manufacturer:
- STMicroelectronics
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
ST1L02PU25R.pdf
- Description:
- IC REG LINEAR 2.5V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,581
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Product details
Overview
ST1L02PU25R from STMicroelectronics is a fixed-output 2.5 V, 1 A low-dropout linear voltage regulator in DFN6D (3×3 mm) package, fabricated in BiCMOS technology. It delivers ±2% output voltage accuracy at 25 °C, maintains quiescent current ≤500 µA over temperature, and achieves typ. 0.7 V dropout at 1 A load-designed for stable operation with low-ESR ceramic capacitors in data storage power rails.
For engineers reviewing the ST1L02PU25R datasheet, ST1L02PU25R pinout, ST1L02PU25R application, or ST1L02PU25R equivalent, key selection criteria include dropout voltage at full load, thermal shutdown hysteresis behavior, output sense pin availability, and compatibility with 4.7 µF ceramic input/output capacitors in space-constrained HDD read-channel designs.
Technical Context
The ST1L02PU25R implements a BiCMOS-based LDO architecture with internal current limiting and thermal shutdown featuring hysteresis to prevent oscillation during overtemperature events. Its feedback loop is optimized for stability with 4.7 µF X7R ceramic capacitors on both input and output, eliminating need for tantalum or electrolytic types.
It supports two configurations: standard (no VO_SENSE) and precision-sense variants-this part (ST1L02PU25R) includes the VO_SENSE pin (Pin 5), enabling remote sensing to compensate PCB trace IR drop. The exposed thermal pad is internally connected to GND for enhanced thermal dissipation in high-power-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% at 25 °C; ensures tight regulation for 2.5 V logic and memory interfaces without external resistors. |
| Max Output Current | 1.0 A minimum; sufficient to power HDD read channel ICs and flash memory controllers under peak transient loads. |
| Quiescent Current | ≤500 µA at 25 °C, ≤650 µA over 0–125 °C; enables low-power standby modes in portable storage devices. |
| Dropout Voltage | 0.7 V typ. @ 1 A; allows operation from 3.2 V input (e.g., Li-ion battery + LDO cascade) while maintaining 2.5 V output. |
| Thermal Shutdown | 165 °C trip point with hysteresis; prevents latch-up during sustained overload and enables safe auto-recovery after cooling. |
| Stability | Guaranteed with ≥4.7 µF ceramic CO (X7R); eliminates ESR requirements and simplifies layout vs. older tantalum-dependent regulators. |
| Supply Rejection | 50–75 dB @ 120 Hz; suppresses ripple from upstream switching converters feeding the LDO input. |
Pinout & Package
ST1L02PU25R is housed in a thermally enhanced DFN6D (3×3 mm, 0.75 mm height) package with an exposed GND pad. Pin 2 connects to GND, Pin 4 is VO, Pin 5 is VO_SENSE (must be shorted to Pin 4 unless remote sensing is used), Pin 6 is VI, and Pins 1 & 3 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 & 3 | N.C. | No internal connection; must remain unconnected per design-floating or tied to GND has no functional impact. |
| Pin 2 | GND | Power ground reference and thermal path via exposed metal pad; requires full-solder coverage for optimal θJA = 55 °C/W. |
| Pin 4 | VO | Main regulated 2.5 V output; bypassed with 4.7 µF ceramic capacitor placed ≤0.5 inch away to ensure transient response. |
| Pin 5 | VO_SENSE | Remote output voltage sense input; connect directly to Pin 4 for local regulation or to load-side of PCB trace for compensation of I·R drop. |
| Pin 6 | VI | Input supply (max 10 V DC); bypassed with 4.7 µF ceramic capacitor placed ≤0.5 inch away to suppress high-frequency noise. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Process Technology | Enables <650 µA max quiescent current across 0–125 °C junction range-critical for thermal management in sealed HDD enclosures. |
| Low-ESR Ceramic Stability | Validated with 4.7 µF X7R ceramics only; removes dependency on higher-cost, larger-footprint tantalum capacitors and improves reliability. |
| Integrated Protection | Thermal shutdown with hysteresis + current limiting-eliminates need for external foldback or reset circuitry in compact storage modules. |
| DFN6D Thermal Performance | RthJC = 10 °C/W enables >1 W continuous dissipation with minimal heatsinking-supports 1 A load at 3.2 V input (0.7 V dropout × 1 A = 0.7 W). |
Applications
| HDD Read Channel Power | SSD Controller Core Supply |
|---|---|
|
Use Scenario: Powers analog front-end and digital signal processing blocks in hard disk drive read channel ICs requiring clean, stable 2.5 V. IC Role / Device Role / Timing Role: Primary post-regulation LDO delivering low-noise 2.5 V to high-speed ADCs and servo control logic. Use Value: 0.003%VO RMS noise and 5%VO load transient response enable <1 LSB error in 12-bit read channel ADCs during seek operations. |
Use Scenario: Supplies core logic voltage to NAND flash controller SoCs in solid-state drives operating from 3.3 V intermediate rail. IC Role / Device Role / Timing Role: Low-quiescent LDO generating 2.5 V domain for PCIe interface PHY and ECC accelerator blocks. Use Value: 500 µA IQ enables <10 µW static power overhead per controller, extending idle time in enterprise SSD power states. |
| Industrial Data Acquisition Module | Embedded Network Storage Controller |
|
Use Scenario: Provides precision 2.5 V reference and analog supply for 16-bit SAR ADCs in DIN-rail mounted DAQ systems. IC Role / Device Role / Timing Role: Regulator with VO_SENSE pin compensating for 50 mΩ PCB trace resistance between LDO and ADC VDD pins. Use Value: Remote sensing reduces output voltage error from ±35 mV to ±5 mV under 1 A load, meeting 0.1% absolute accuracy requirement. |
Use Scenario: Powers ARM-based network-attached storage (NAS) SoC subsystems where 2.5 V supplies DDR I/O or USB 3.0 PHY. IC Role / Device Role / Timing Role: High-current LDO with thermal hysteresis protecting NAS board during ambient temperature spikes in enclosed chassis. Use Value: 165 °C trip + hysteresis prevents thermal cycling failure during sustained 45 °C ambient operation with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6209B25MR-G | 2.5 V, 1 A, 150 µA IQ, SOT-25 package, no VO_SENSE pin, RthJA = 200 °C/W | Lacks remote sensing and thermal pad; unsuitable for >300 mA continuous loads in confined spaces | Select when ultra-low IQ dominates over thermal performance and remote sensing is unnecessary. |
| ON Semiconductor NCP1117ST25T3G | 2.5 V, 1 A, 6 mA IQ, SOT-223 package, no VO_SENSE, dropout = 1.2 V @ 1 A | Higher dropout limits input flexibility; higher IQ increases standby power by 12× | Choose only if legacy SOT-223 footprint compatibility is mandatory and thermal margin is ample. |
Compared with XC6209B25MR-G and NCP1117ST25T3G, ST1L02PU25R uniquely combines low dropout (0.7 V), ultra-low IQ (≤500 µA), VO_SENSE capability, and DFN6D thermal efficiency-making it optimal for thermally constrained, high-precision 2.5 V power domains in storage and industrial edge nodes.
Availability
ST1L02PU25R is available at Aetrix Electronics and suitable for HDD read channel power, SSD controller core supply, industrial data acquisition modules, and embedded network storage controllers requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for ST1L02PU25R 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The ST1L02xx series belongs to ST's high-precision, low-quiescent LDO product line-engineered specifically for data storage applications demanding tight voltage tolerance, low noise, and robust thermal protection in miniaturized form factors.
FAQ
What is the minimum input voltage required for ST1L02PU25R to regulate 2.5 V at 1 A?
The minimum input voltage is determined by dropout: 2.5 V + 0.7 V = 3.2 V typical. Per datasheet Table 6, VI ≥ 3.2 V is required for start-up and regulation at full load. Below this, output collapses or enters dropout mode with unregulated behavior.
Can ST1L02PU25R operate without the VO_SENSE pin connected?
Yes-Pin 5 (VO_SENSE) must be shorted to Pin 4 (VO) for local regulation. Leaving it floating violates the recommended application schematic and may cause instability or inaccurate regulation due to undefined feedback node impedance.
Is ST1L02PU25R qualified for automotive applications?
No-ST1L02PU25R is not specified as automotive-grade (AEC-Q100). Its operating junction temperature range is 0–125 °C, and ST explicitly states non-automotive qualification in the datasheet disclaimer. Use only in industrial or commercial environments.
What is the maximum allowable input voltage for continuous operation?
The absolute maximum rating is 10 V DC (Table 3), but continuous operation above 7 V is discouraged due to thermal stress. At VI = 7 V and IO = 1 A, power dissipation reaches (7 − 2.5) × 1 = 4.5 W-exceeding the package's safe operating area without active cooling.
ST1L02PU25R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.1V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 650 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (3x3)
ST1L02PU25R FAQ
1.How can I place an order for ST1L02PU25R through Aetrix?
Please submit a Request for Quotation (RFQ) for ST1L02PU25R 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 ST1L02PU25R reliable?
The price and inventory of ST1L02PU25R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST1L02PU25R is usually 5 days.
3.What payment methods are accepted for ST1L02PU25R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST1L02PU25R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST1L02PU25R?
ST1L02PU25R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST1L02PU25R 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 ST1L02PU25R?
For technical support, including ST1L02PU25R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST1L02PU25R requirements.
6.How does Aetrix verify that ST1L02PU25R is sourced from the original manufacturer or authorized distributors?
All ST1L02PU25R 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 ST1L02PU25R meets industry standards.
7.What is the process for return or replacement of ST1L02PU25R?
All ST1L02PU25R units undergo pre-shipment inspection (PSI). If there is an issue with ST1L02PU25R, 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 ST1L02PU25R part is unused and in its original packaging.
Return procedure for ST1L02PU25R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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