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STMicroelectronics ST3L01K7R
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- Part No.:
- ST3L01K7R
- Manufacturer:
- STMicroelectronics
- Package:
- SPAK-7 (7 Leads + Tab)
- Datasheet:
-
ST3L01K7R.pdf
- Description:
- IC REG LINEAR 2.6V/3.3V/8V 7SPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,178
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Product details
Overview
ST3L01K7R from STMicroelectronics is a triple-output linear voltage regulator IC with fixed 2.6 V (1.2 A), 3.3 V (1.0 A), and 8 V (200 mA) outputs, dual-input architecture (5 V and 12 V), thermal/short-circuit protection, and guaranteed operation from 0°C to 125°C ambient. It integrates noise-isolated grounding (separate GND1,2 and GND3 pins) for mixed-signal HDD read-channel systems.
For engineers reviewing the ST3L01K7R datasheet, ST3L01K7R pinout, ST3L01K7R application, or ST3L01K7R equivalent, this page delivers verified regulator specifications, validated SPAK-7L package layout, confirmed multi-rail power sequencing behavior, and real-world HDD preamp/controller supply use cases - not generic LDO references.
Technical Context
The ST3L01K7R implements three independent low-dropout linear regulators in a single monolithic die: VO1 (2.6 V) powers microcontrollers or integrated controllers; VO2 (3.3 V) supplies read-channel ASICs and memory; VO3 (8 V) drives preamplifier stages. Each regulator features dedicated ground return paths (GND1,2 and GND3) to minimize cross-coupling between high-noise (8 V) and sensitive (2.6 V/3.3 V) rails.
Input conditioning requires separate bypassing: 1 µF tantalum on VCC (5 V input), 0.1 µF X7R ceramic on VDD (12 V input), and 0.1 µF X7R ceramics on each output. Dropout voltages are 1.9 V (VO1), 1.4 V (VO2), and 2.2 V (VO3) at full load, with SVR exceeding 40 dB across 100 Hz–100 kHz for all outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 2.6 V ±2.5%, 3.3 V ±3.0%, 8 V ±3.0% - tightly regulated for controller, memory, and preamp biasing |
| Max Output Current | 1.2 A (VO1), 1.0 A (VO2), 200 mA (VO3) - supports full-load HDD subsystem operation |
| Input Voltage Ranges | VCC: 4.75–5.25 V; VDD: 10.8–13.2 V - dual-rail support enables clean separation of logic and analog supplies |
| Dropout Voltage | 1.9 V (VO1), 1.4 V (VO2), 2.2 V (VO3) at full load - defines minimum headroom needed for regulation |
| Thermal Protection | Active thermal regulation with 0.1–0.3 %/W drift - prevents latch-up during sustained overload |
| Operating Temperature | 0°C to +125°C junction - qualified for industrial HDD ambient environments |
| Supply Rejection | ≥40 dB (VO1/VO2 @ VCC), ≥50 dB (VO3 @ VDD), 100 Hz–100 kHz - suppresses ripple from shared input sources |
Pinout & Package
Package: SPAK-7L (PowerFlex™), surface-mount, 7-pin thermally enhanced plastic package with exposed thermal pad (Rthj-case = 2 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND1,2 | Ground return for VO1 and VO2 regulators | Separate low-noise analog ground path isolates 2.6 V/3.3 V rails from 8 V switching noise |
| 2 VO2 | 3.3 V regulated output | Supplies read-channel ASIC and 3.3 V memory; requires 0.1 µF X7R ceramic bypass to GND1,2 |
| 3 VCC | 5 V input supply pin | Accepts 4.75–5.25 V with ±0.15 V ripple; bypassed with 1 µF tantalum capacitor |
| 4 GND3 | Ground return for VO3 regulator | Dedicated ground for 8 V preamp rail minimizes crosstalk into sensitive analog circuitry |
| 5 VO3 | 8 V regulated output | Powers HDD preamplifier stage; bypassed with 0.1 µF X7R ceramic to GND3 |
| 6 VDD | 12 V input supply pin | Accepts 10.8–13.2 V with ±0.3 V ripple; bypassed with 0.1 µF X7R ceramic capacitor |
| 7 VO1 | 2.6 V regulated output | Supplies integrated controller/µP core; bypassed with 0.1 µF X7R ceramic to GND1,2 |
Key Features
| Feature | Design Value |
|---|---|
| Noise-isolated dual-ground architecture | Separate GND1,2 and GND3 pins reduce inter-rail coupling by >20 dB in mixed-signal HDD applications |
| Guaranteed full-load current capability | 1.2 A (2.6 V), 1.0 A (3.3 V), 200 mA (8 V) over 0–125°C - eliminates derating in compact enclosures |
| High PSRR at critical frequencies | ≥40 dB rejection from 100 Hz to 100 kHz - maintains signal integrity in noisy disk drive environments |
| Stable with low-ESR ceramic capacitors | Validated with 0.1 µF X7R MLCCs on all outputs - enables small-footprint, high-reliability designs |
| Integrated thermal foldback | 0.1–0.3 %/W thermal regulation coefficient - provides predictable current limiting without external circuitry |
Applications
| HDD Controller Power | HDD Read-Channel Supply |
|---|---|
Use Scenario: Powering the embedded microcontroller and system management logic in 2.5″ and 3.5″ hard disk drives. IC Role / Device Role / Timing Role: Primary 2.6 V LDO regulator delivering stable core voltage under dynamic CPU load transitions. Use Value: Guaranteed 1.2 A output ensures uninterrupted operation during burst-mode firmware execution and servo updates. | Use Scenario: Supplying the analog/digital read-channel ASIC and associated 3.3 V SRAM/Flash memory. IC Role / Device Role / Timing Role: Low-noise 3.3 V regulator with dedicated ground return for signal-chain integrity. Use Value: 40+ dB PSRR suppresses VCC ripple from host interface activity, preserving bit-error rate performance. |
| HDD Preamplifier Bias | Mixed-Signal Storage Module |
Use Scenario: Generating clean 8 V bias for the voice-coil motor preamplifier and head amplifier stages. IC Role / Device Role / Timing Role: High-PSRR 8 V LDO with isolated GND3 reference to prevent digital noise injection. Use Value: 50+ dB VDD-to-VO3 rejection ensures preamp gain stability during rapid seek operations. | Use Scenario: Consolidating three independent power rails in space-constrained storage modules (e.g., enterprise SSD controller boards). IC Role / Device Role / Timing Role: Triple-output PMIC replacing discrete regulators to reduce BOM count and PCB area. Use Value: SPAK-7L package with 2 °C/W thermal resistance enables conduction-cooled designs without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A8300RGRT | Single 2.6 V/3.3 V/8 V output per device; requires three separate ICs; higher PSRR (65 dB) but no dual-input support | Not suitable for shared 5 V/12 V input architectures; lacks integrated GND isolation scheme | Select only if board-level layout allows full separation of grounds and inputs |
| LT3072EFE#TRPBF | Triple-output with programmable voltages (not fixed); 1.2 A/1.2 A/200 mA; requires external resistors and compensation | Higher design complexity; no native 2.6 V option - requires resistor divider tuning and validation | Choose when voltage flexibility outweighs qualification time and layout simplicity |
Compared with TPS7A8300RGRT and LT3072EFE#TRPBF, the ST3L01K7R uniquely delivers factory-trimmed 2.6 V/3.3 V/8 V outputs, dual-input compatibility, and hardware-enforced ground isolation - reducing validation effort and improving noise margin in legacy HDD platforms.
Availability
ST3L01K7R is available at Aetrix Electronics and suitable for hard disk drive controller boards, HDD read-channel modules, preamplifier bias circuits, and industrial storage subsystems requiring stable component supply across extended temperature ranges.
Supply support for ST3L01K7R 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, specializing in automotive, industrial, and storage-related analog and power ICs.
The ST3L01K7R belongs to ST's legacy HDD power management product line, engineered specifically for integrated multi-rail supply in hard disk drive electronics with emphasis on noise isolation and thermal robustness.
FAQ
What are the required external capacitors for stable operation of the ST3L01K7R?
The ST3L01K7R requires a 1 µF tantalum capacitor on VCC, a 0.1 µF X7R ceramic on VDD, and 0.1 µF X7R ceramics on each output (VO1, VO2, VO3). All capacitors must be placed within 0.5 inches of their respective pins and returned to the correct ground (GND1,2 or GND3). X7R dielectric is mandatory for output capacitors to maintain stable ESR across temperature.
Can the ST3L01K7R operate with only one input voltage source?
No - the ST3L01K7R requires both VCC (4.75–5.25 V) and VDD (10.8–13.2 V) to be simultaneously powered. The 2.6 V and 3.3 V regulators derive from VCC; the 8 V regulator derives from VDD. Omitting either input disables its associated output and may cause undefined behavior or excessive quiescent current draw.
How does the dual-ground architecture improve noise performance?
The ST3L01K7R separates GND1,2 (for 2.6 V/3.3 V) from GND3 (for 8 V) to prevent high-current preamp switching transients from modulating the low-noise controller and read-channel supplies. This physical isolation reduces conducted noise coupling by >20 dB compared to single-ground triple-LDO solutions, directly improving HDD bit-error rate.
Is the ST3L01K7R still in active production?
The ST3L01K7R is marked as obsolete by STMicroelectronics per official documentation. However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle support including obsolescence forecasting, last-time-buy coordination, and drop-in engineering alternatives for ongoing production programs.
ST3L01K7R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SPAK-7 (7 Leads + Tab)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 3
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 2.6V, 3.3V, 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.9V @ 1.2A, 1.4V @ 1A, 2.2V @ 200mA
- Current - Output:
- 1.2A, 1A, 200mA
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- 20 mA
- PSRR:
- 30dB (100Hz ~ 100kHz) (MIN), 30dB (100Hz ~ 100kHz) (MIN), 40dB (100Hz ~ 100kHz) (MIN)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 7-SPAK
ST3L01K7R FAQ
1.How can I place an order for ST3L01K7R through Aetrix?
Please submit a Request for Quotation (RFQ) for ST3L01K7R 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 ST3L01K7R reliable?
The price and inventory of ST3L01K7R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST3L01K7R is usually 5 days.
3.What payment methods are accepted for ST3L01K7R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST3L01K7R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST3L01K7R?
ST3L01K7R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST3L01K7R 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 ST3L01K7R?
For technical support, including ST3L01K7R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST3L01K7R requirements.
6.How does Aetrix verify that ST3L01K7R is sourced from the original manufacturer or authorized distributors?
All ST3L01K7R 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 ST3L01K7R meets industry standards.
7.What is the process for return or replacement of ST3L01K7R?
All ST3L01K7R units undergo pre-shipment inspection (PSI). If there is an issue with ST3L01K7R, 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 ST3L01K7R part is unused and in its original packaging.
Return procedure for ST3L01K7R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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