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STMicroelectronics ST1L02PM33R
- Part No.:
- ST1L02PM33R
- Manufacturer:
- STMicroelectronics
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
ST1L02PM33R.pdf
- Description:
- IC REG LINEAR 3.3V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
ST1L02PM33R from STMicroelectronics is a fixed 3.3 V, 1 A BiCMOS low-dropout linear voltage regulator in a DFN6D (3×3 mm) package, featuring ±2 % output tolerance at 25 °C, max 500 µA quiescent current over temperature, and 0.7 V typical dropout at 1 A load. It delivers stable power to read channel and memory ICs in HDD systems.
For engineers reviewing the ST1L02PM33R datasheet, ST1L02PM33R pinout, ST1L02PM33R application, or ST1L02PM33R equivalent, key selection criteria include dropout voltage under full load, ceramic capacitor stability, thermal shutdown hysteresis, and output sense pin availability for precision regulation.
Technical Context
The ST1L02PM33R uses BiCMOS process technology to achieve tightly controlled quiescent current (≤650 µA across 0–125 °C junction range) while maintaining fast transient response and low noise (0.003 %VO RMS, 10 Hz–10 kHz). Its internal protection includes foldback current limiting and thermal shutdown with hysteresis at 165 °C.
It operates with input voltages from 4.75 V to 7 V and supports stable regulation using low-ESR ceramic capacitors (4.7 µF typical), with no requirement for external compensation. The device offers two variants: with (ST1L02PM33R) and without (ST1L02PU33R) VO_SENSE pin for remote sensing capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V, ±2 % tolerance at 25 °C - ensures compatibility with 3.3 V logic and memory interfaces without external feedback. |
| Max Output Current | 1 A minimum - sufficient to power HDD read channels and flash memory controllers in single-rail designs. |
| Quiescent Current | ≤500 µA at 25 °C, ≤650 µA over 0–125 °C - enables low-power standby operation in storage subsystems. |
| Dropout Voltage | 0.7 V typ. @ 1 A - allows operation from 4.75 V input while maintaining regulation, minimizing heat dissipation. |
| Stability | Guaranteed with ≥4.7 µF ceramic output capacitor - eliminates need for tantalum or electrolytic capacitors, reducing board area and cost. |
| Protection Features | Thermal shutdown (165 °C trip), overcurrent limiting, and internal short-circuit recovery - prevents damage during fault conditions without external circuitry. |
Pinout & Package
Supplied in a thermally enhanced DFN6D (3×3 mm) package with exposed GND pad. Package meets ECOPACK® environmental compliance and JEDEC JESD97 marking requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | N.C. | No internal connection - must remain unconnected on PCB; no pull-up/down required. |
| 2 | GND | Ground reference and thermal path - connected to exposed metal pad for low RthJA (55 °C/W). |
| 4 | VO | Regulated 3.3 V output - requires local 4.7 µF ceramic bypass to GND within 12.7 mm (0.5 inch). |
| 5 | VO_SENSE | Remote output voltage sensing - tied directly to pin 4 for improved load regulation accuracy under PCB trace resistance. |
| 6 | VI | Input supply (4.75–7 V) - requires local 4.7 µF ceramic bypass to GND within 12.7 mm (0.5 inch). |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Process Technology | Enables <650 µA quiescent current across full operating temperature range (0–125 °C), critical for HDD idle-mode power budgets. |
| Low-ESR Ceramic Stability | Validated with 4.7 µF X7R ceramics - avoids aging, leakage, and size penalties of tantalum capacitors in compact storage modules. |
| Thermal Shutdown with Hysteresis | 165 °C trip point with built-in hysteresis - prevents thermal cycling during sustained overload, ensuring reliable recovery. |
| Output Sense Pin Option | VO_SENSE (pin 5) enables remote sensing to compensate for PCB IR drop - improves regulation accuracy to ±2 % under dynamic load. |
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. IC Role / Device Role / Timing Role: Primary 3.3 V LDO delivering clean, low-noise bias to high-speed ADCs and servo control logic. Use Value: 0.003 %VO RMS noise and 5 %VO load transient response ensure bit-error-rate integrity during high-density data retrieval. | Use Scenario: Supplies core logic voltage to NAND flash controller ASICs in solid-state drives. IC Role / Device Role / Timing Role: Fixed-output LDO providing regulated 3.3 V to processor cores and DMA engines during burst write operations. Use Value: 1 A capability and 0.7 V dropout enable efficient operation from 5 V rail, reducing thermal load in dense SSD modules. |
| Embedded Memory Interface | Industrial Data Acquisition Module |
Use Scenario: Powers parallel or serial NOR/NAND flash memory chips requiring tight 3.3 V regulation. IC Role / Device Role / Timing Role: Stable voltage source for memory I/O and command decoding circuitry in boot ROM or firmware storage. Use Value: ±2 % output tolerance and 10 mV load regulation guarantee timing margin compliance for memory access cycles up to 100 MHz. | Use Scenario: Supplies sensor interface and microcontroller peripherals in isolated industrial DAQ units. IC Role / Device Role / Timing Role: Low-quiescent LDO powering precision ADC references and op-amp signal chains. Use Value: 500 µA max IQ enables >10-year battery life in maintenance-free field instruments with periodic wake-up sampling. |
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 |
|---|---|---|---|
| TSM1033W | Higher dropout (1.2 V @ 1 A), wider input range (2.5–18 V), no VO_SENSE pin | Suitable for higher-input industrial rails but lacks remote sensing for precision loads | Select when input exceeds 7 V or VO_SENSE is unnecessary; verify thermal derating at 1 A. |
| MCP1703T-3302E/MB | Lower IQ (2 µA typ.), lower current (250 mA), SOT-23-5 package | Targeted at ultra-low-power microcontrollers, not HDD/SSD power delivery | Choose only for sub-250 mA, battery-operated edge nodes where quiescent current dominates design priority. |
Compared with TSM1033W and MCP1703T-3302E/MB, the ST1L02PM33R uniquely balances 1 A output, 0.7 V dropout, and VO_SENSE capability in a thermally optimized DFN6D package-making it optimal for space-constrained, high-current storage applications demanding regulation accuracy and thermal robustness.
Availability
ST1L02PM33R is available at Aetrix Electronics and suitable for HDD read channel power, SSD controller core supply, and embedded memory interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ST1L02PM33R 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, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.
The ST1L02xx series targets high-reliability data storage systems, specifically engineered to replace legacy LDOs in HDD/SSD platforms where low dropout, ceramic stability, and thermal resilience are mandatory.
FAQ
What is the minimum input voltage required for ST1L02PM33R to maintain regulation at 1 A?
The minimum input voltage is 4.0 V, derived from the 3.3 V output plus 0.7 V typical dropout voltage at 1 A load. Operation below this risks dropout and output collapse; datasheet specifies 4.75 V minimum for guaranteed performance across temperature and tolerance.
Can ST1L02PM33R operate without the VO_SENSE pin connected?
Yes - pin 5 (VO_SENSE) is optional. When left unconnected, the regulator operates in local-sense mode using pin 4 (VO) as both output and feedback node. Remote sensing is only required when PCB trace resistance introduces >10 mV error under full load.
Is an input capacitor mandatory, and what value is recommended?
Yes, an input capacitor is mandatory for stability and EMI suppression. ST recommends a minimum 4.7 µF X7R ceramic capacitor placed within 12.7 mm (0.5 inch) of pin 6 (VI); larger values (up to 22 µF) improve line transient response without compromising stability.
Does ST1L02PM33R require thermal vias under the exposed pad?
Yes - the exposed GND pad (pin 2) serves as the primary thermal path. ST's mechanical data specifies connecting it to a minimum 100 mm² copper pour with ≥4 thermal vias (0.3 mm diameter) to an inner ground plane to achieve the rated RthJA of 55 °C/W.
ST1L02PM33R 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):
- 3.3V
- 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)
ST1L02PM33R FAQ
1.How can I place an order for ST1L02PM33R through Aetrix?
Please submit a Request for Quotation (RFQ) for ST1L02PM33R 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 ST1L02PM33R reliable?
The price and inventory of ST1L02PM33R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST1L02PM33R is usually 5 days.
3.What payment methods are accepted for ST1L02PM33R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST1L02PM33R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST1L02PM33R?
ST1L02PM33R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST1L02PM33R 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 ST1L02PM33R?
For technical support, including ST1L02PM33R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST1L02PM33R requirements.
6.How does Aetrix verify that ST1L02PM33R is sourced from the original manufacturer or authorized distributors?
All ST1L02PM33R 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 ST1L02PM33R meets industry standards.
7.What is the process for return or replacement of ST1L02PM33R?
All ST1L02PM33R units undergo pre-shipment inspection (PSI). If there is an issue with ST1L02PM33R, 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 ST1L02PM33R part is unused and in its original packaging.
Return procedure for ST1L02PM33R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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