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STMicroelectronics ST2L05R3300PS
- Part No.:
- ST2L05R3300PS
- Manufacturer:
- STMicroelectronics
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ST2L05R3300PS.pdf
- Description:
- IC REG LIN POS ADJ 1A/1A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,720
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Product details
Overview
ST2L05R3300PS from STMicroelectronics is a dual low-dropout voltage regulator IC with fixed 3.3V output on VO1 and adjustable output (1.25V to VI − VDROP) on VO2, delivering up to 1A per channel, ±2% output tolerance at 25°C, 1.3V dropout at 1A, and thermal shutdown at 175°C - deployed in hard disk drives and optical storage controllers for dual-rail power management.
For engineers reviewing the ST2L05R3300PS datasheet, ST2L05R3300PS pinout, ST2L05R3300PS application, or ST2L05R3300PS equivalent, this page delivers verified electrical specs, DFN 5×6mm package layout, fixed/adjustable regulator interaction, thermal resistance (2°C/W junction-to-case), and real-world stability conditions with ceramic capacitors.
Technical Context
The ST2L05R3300PS integrates two independent LDO regulators: VO1 is factory-trimmed to 3.3V with ±2% accuracy at 25°C and ±3% over 0–125°C; VO2 uses an internal 1.25V reference (±1.2% over temp) and external resistor divider (R1/R2) to set output from 1.25V to VI − VDROP, supporting microcontroller core/logic rail flexibility.
Both outputs feature current limiting (1A each), thermal shutdown (175°C, 5°C hysteresis), and stability with low-ESR ceramic capacitors (4.7µF typical, X7R grade). The DFN 5×6mm package provides 2°C/W junction-to-case thermal resistance, enabling high-power-density operation in space-constrained optical drive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VO1 Output Voltage | Fixed 3.3V ±2% at 25°C; ensures stable I/O voltage for SATA/ATA interface circuitry in HDD/CD-ROM controllers. |
| VO2 Output Range | Adjustable 1.25V to VI − VDROP; supports configurable core voltage for ARM-based or proprietary MCUs in combo drives. |
| Max Output Current | 1A per channel; sustains peak load transients in spindle motor control and laser diode driver circuits. |
| Dropout Voltage | 1.3V at 1A (VO1/VO2); enables operation from 4.5–7V input rails common in 5V-based optical storage power architectures. |
| Quiescent Current | 7mA max over temperature; minimizes standby power loss in always-on DVD-RW firmware execution modes. |
| Thermal Resistance | Junction-to-case = 2°C/W (DFN); allows >2W continuous dissipation without external heatsink in compact drive assemblies. |
| Output Tolerance | ±3% over 0–125°C; meets JEDEC JESD22-A108 reliability requirements for consumer optical storage lifetime. |
Pinout & Package
ST2L05R3300PS is housed in an 8-pin DFN 5×6mm surface-mount package with exposed thermal pad (pin 6), optimized for high thermal conductivity in optical drive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VI (Input) | Main supply input (4.5–7V); requires 4.7µF X7R ceramic capacitor within 0.5″ for EMI suppression and transient response. |
| 2 | ADJ | Adjust pin for VO2; connects to resistor divider midpoint; sinks ≤1µA to set VO2 = 1.25V × (1 + R1/R2). |
| 3 | GND | Analog ground reference; must be low-impedance plane shared with input/output capacitors for noise immunity. |
| 4 | VO2 | Adjustable output; bypassed with 4.7µF X7R cap to GND; supports dynamic core voltage scaling in embedded controllers. |
| 5 | VO1 | Fixed 3.3V output; bypassed with 4.7µF X7R cap to GND; powers interface logic, flash memory, and servo ASICs. |
| 6 | EP (Exposed Pad) | Thermal pad tied to PCB ground plane; critical for achieving 2°C/W junction-to-case thermal resistance. |
| 7, 8 | NC | No-connect pins; left unconnected per datasheet; no internal function or routing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | VO1 fixed at 3.3V, VO2 adjustable - enables simultaneous I/O and core rail generation from single input, reducing BOM count in optical drive SMPS designs. |
| Low-ESR ceramic stability | Stable with ≥4.7µF X7R MLCCs on all rails - eliminates need for bulk tantalum, lowering cost and improving MTBF in consumer-grade drives. |
| Thermal protection | 175°C shutdown with 5°C hysteresis - prevents latch-up during laser diode surge events or spindle stall conditions in CD/DVD mechanisms. |
| High PSRR | 60dB supply rejection at 120Hz - suppresses ripple from upstream switching converters, ensuring clean analog bias for servo amplifiers. |
| Minimal load requirement | 0mA for VO1, 2mA for VO2 - eliminates need for dummy loads, simplifying design for low-power sleep states in USB-powered portable drives. |
Applications
| HDD Spindle & Servo Control | CD/DVD Laser Diode Bias |
|---|---|
Use Scenario: Powering spindle motor driver ICs and position-sensing servo amplifiers in 2.5″/3.5″ hard disk drives. IC Role / Device Role / Timing Role: VO1 supplies 3.3V to digital interface logic; VO2 delivers adjustable 1.8V–2.5V to analog servo loop op-amps and DACs. Use Value: Tight ±3% output tolerance over 0–125°C ensures consistent closed-loop gain and phase margin across operating temperature range. |
Use Scenario: Providing precision bias voltage to red (650nm) and infrared (780nm) laser diodes in CD-ROM and DVD-ROM drives. IC Role / Device Role / Timing Role: VO2 configured at 2.8V–3.0V powers laser driver ICs; VO1 supplies 3.3V to photodiode amplifier and focus/tracking ADCs. Use Value: 10% transient response (1mA ↔ 1A step) prevents optical power overshoot that could damage laser facets during seek operations. |
| DVD±RW Firmware Execution | Combo Drive (DVD+CD) Power Management |
Use Scenario: Supporting ARM9-based controller SoCs executing firmware during disc read/write in DVD-RW drives. IC Role / Device Role / Timing Role: VO2 set to 1.25V–1.5V powers CPU core; VO1 supplies 3.3V to DDR SDRAM interface and NAND flash boot loader. Use Value: 7mA quiescent current extends battery life in portable DVD players during standby and menu navigation. |
Use Scenario: Consolidating power rails for dual-format optical drives integrating DVD-ROM and CD-R/RW functionality. IC Role / Device Role / Timing Role: VO1 powers shared interface logic; VO2 dynamically reconfigured between 1.8V (CD logic) and 2.5V (DVD decoder) via firmware-controlled resistors. Use Value: Single-package dual-LDO replaces discrete regulators, reducing PCB area by 35% and eliminating inter-rail coupling noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS7A8300RGRT | Single-channel, 3A LDO with 20µVrms noise; no second output or adjustable VO2. | Requires external regulator for second rail; better for low-noise analog but not drop-in replacement. | Select when ultra-low noise dominates over dual-rail integration. |
| Richtek RTQ2132B-QT | Dual 2A/1A LDOs, but fixed-only outputs (3.3V/1.8V); no adjustable VO2 capability. | Suitable for fixed-rail systems only; lacks flexibility for MCU core voltage tuning. | Select when both rails are static and higher current is needed on VO1. |
Compared with TPS7A8300RGRT and RTQ2132B-QT, ST2L05R3300PS uniquely combines fixed 3.3V and user-adjustable VO2 in one DFN package - essential for optical drive designs requiring both interface stability and core voltage programmability without board space penalty.
Availability
ST2L05R3300PS is available at Aetrix Electronics and suitable for hard disk drive controllers, CD/DVD-ROM firmware platforms, and combo optical storage modules requiring stable component supply, thermal robustness, and dual-rail integration.
Supply support for ST2L05R3300PS 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 specializing in power management, automotive ICs, and microcontrollers, with manufacturing ISO/TS 16949-certified facilities.
The ST2L05 product line targets data storage power systems, delivering integrated dual-LDO solutions optimized for thermal efficiency, small footprint, and reliability in HDD, CD/DVD, and Blu-ray drive applications.
FAQ
What input voltage range is supported by ST2L05R3300PS?
The ST2L05R3300PS operates from 4.5V to 7V input, with guaranteed performance across this range. Absolute maximum input is 10V, but sustained operation above 7V risks exceeding thermal limits due to increased dropout dissipation. Input ripple must stay within ±0.15V to maintain regulation stability.
Can VO2 be used as a fixed 2.5V output without external resistors?
No - VO2 is inherently adjustable and requires an external resistor divider (R1/R2) between VO2, ADJ, and GND to set any output voltage. There is no internal fixed option for VO2; the "R3300" ordering suffix indicates VO1 = 3.3V and VO2 = adjustable, not fixed.
Is the DFN 5×6mm package lead-free and RoHS-compliant?
Yes - ST2L05R3300PS uses a lead-free, halogen-free DFN package compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3), qualified for standard reflow profiles up to 260°C peak.
How does thermal shutdown behave during overload conditions?
Thermal shutdown activates at 175°C junction temperature with 5°C hysteresis, forcing both outputs to fold back until die temperature drops to ~170°C. This protects against sustained overcurrent or poor PCB heatsinking, and recovery is automatic - no reset pin or external intervention required.
ST2L05R3300PS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.25V (3.3V)
- Voltage - Output (Max):
- 5.7V
- Voltage Dropout (Max):
- 1.3V @ 1A, 1.3V @ 1A
- Current - Output:
- 1A, 1A
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (5x6)
ST2L05R3300PS FAQ
1.How can I place an order for ST2L05R3300PS through Aetrix?
Please submit a Request for Quotation (RFQ) for ST2L05R3300PS 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 ST2L05R3300PS reliable?
The price and inventory of ST2L05R3300PS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST2L05R3300PS is usually 5 days.
3.What payment methods are accepted for ST2L05R3300PS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST2L05R3300PS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST2L05R3300PS?
ST2L05R3300PS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST2L05R3300PS 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 ST2L05R3300PS?
For technical support, including ST2L05R3300PS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST2L05R3300PS requirements.
6.How does Aetrix verify that ST2L05R3300PS is sourced from the original manufacturer or authorized distributors?
All ST2L05R3300PS 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 ST2L05R3300PS meets industry standards.
7.What is the process for return or replacement of ST2L05R3300PS?
All ST2L05R3300PS units undergo pre-shipment inspection (PSI). If there is an issue with ST2L05R3300PS, 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 ST2L05R3300PS part is unused and in its original packaging.
Return procedure for ST2L05R3300PS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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