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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - LinearSI-3011ZD
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SI-3011ZD - Sanken

Manufacturer Part Number
SI-3011ZD
Manufacturer
Sanken Electric Co., Ltd.
Allelco Part Number
32D-SI-3011ZD
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
10,670 pcs available, New & Original
Parts Description
IC REG LINEAR POS ADJ 3A TO263-5
Package
TO-263-5
Data sheet
SI-3011ZD.pdf
RoHs Status
RoHS Compliant
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Our certification
In stock: 10670
  • Unit Price: $2.188
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.188 $2.19
200+ $0.873 $174.60
500+ $0.844 $422.00
1000+ $0.83 $830.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

SI-3011ZD Tech Specifications
Sanken - SI-3011ZD technical specifications, attributes, parameters and parts with similar specifications to Sanken - SI-3011ZD

Product Attribute Attribute Value
Manufacturer Sanken Electric Co., Ltd.
Voltage Dropout (Max) 0.6V @ 3A
Voltage - Output (Min/Fixed) 1.2V
Voltage - Output (Max) 5V
Voltage - Input (Max) 6V
Supplier Device Package TO-263-5
Series -
Protection Features Over Current, Over Temperature
Package / Case TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Package Tape & Reel (TR)
Product Attribute Attribute Value
PSRR 60dB (100Hz ~ 120Hz)
Output Type Adjustable
Output Configuration Positive
Operating Temperature -20°C ~ 100°C
Number of Regulators 1
Mounting Type Surface Mount
Current - Quiescent (Iq) 1.5 mA
Current - Output 3A
Control Features Enable
Base Product Number SI-3011

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

SI-3011ZD Image
SI-3011ZD (1)

Manufacturer Part Number

SI-3011ZD

Manufacturer

sanken

Introduction

The SI-3011ZD is a high-performance, adjustable linear low-dropout (LDO) voltage regulator capable of delivering up to 3A of output current. It is designed to provide a clean and stable output voltage from a wide range of input voltages, making it suitable for a variety of power supply applications. The device features built-in protection mechanisms, including overcurrent and overtemperature protection, ensuring reliable and safe operation.

Product Features and Performance

Adjustable output voltage range: 1.2V to 5V

Output current capability: 3A

Low voltage dropout: 0.6V @ 3A

Low quiescent current: 1.5mA

High power supply rejection ratio (PSRR): 60dB (100Hz ~ 120Hz)

Enable control feature

Overcurrent and overtemperature protection

Product Advantages

Wide input voltage range for versatile applications

High output current capability

Low dropout voltage for efficient power conversion

Integrated protection features for enhanced reliability

Small surface-mount package options for compact designs

Key Reasons to Choose This Product

Exceptional performance and reliability for power-sensitive applications

Flexible output voltage range to meet diverse system requirements

Compact and space-saving package options

Comprehensive protection features to ensure safe and stable operation

Proven quality and reliability from a trusted manufacturer

Quality and Safety Features

Overcurrent protection

Overtemperature protection

Robust and reliable design for long-term operation

Compatibility

The SI-3011ZD is compatible with a wide range of electronic devices and systems that require a clean and stable power supply, including:

Industrial equipment

Consumer electronics

Automotive electronics

Telecommunications equipment

Medical devices

Application Areas

Power supplies for electronic devices

Voltage regulation in industrial and consumer applications

Backup power and energy storage systems

Portable electronics and battery-powered devices

Product Lifecycle

The SI-3011ZD is currently in production and not nearing discontinuation. There are no direct equivalent or alternative models available from sanken. If you have any further questions or need assistance, please contact our sales team through our website.

Frequently Asked Questions(FAQ)

What are the key thermal considerations when using the SI-3011ZD linear regulator in a 3A output application, and how does its dropout voltage impact system efficiency?
The SI-3011ZD operates with a maximum dropout voltage of 0.6V at 3A load current, which directly affects power dissipation in high-current applications. For example, when regulating from a 5.6V input to a 5V output at full load, the regulator dissipates approximately 1.8W (P = (Vin - Vout) × Iload). This significant power loss necessitates careful heatsinking, especially given the TO-263-5 package’s limited thermal resistance to ambient. Engineers must account for junction-to-case and case-to-sink thermal resistances to prevent exceeding the 100°C maximum operating temperature. In compact designs where airflow is minimal, external thermal management or alternative switching regulators may be preferable.
How does the SI-3011ZD compare to fixed-output LDOs like the TPS7A4700 in terms of design flexibility and efficiency for adjustable voltage requirements?
Unlike fixed-output devices such as the TPS7A4700, the SI-3011ZD offers adjustable output from 1.2V to 5V using an external resistor divider, providing greater design flexibility across multiple voltage rails. However, this adjustability comes with trade-offs: the SI-3011ZD has a higher quiescent current of 1.5mA compared to sub-μA levels in modern low-Iq regulators. While both devices support up to 3A, the SI-3011ZD’s 0.6V dropout limits efficiency under large input-output differentials, whereas switching regulators or ultra-low-dropout variants may outperform it in energy-constrained systems.
Can the SI-3011ZD be safely used in automotive environments, and what limitations exist due to its specified operating temperature range?
The SI-3011ZD is rated for operation from -20°C to 100°C, which falls short of typical automotive grade AEC-Q100 requirements extending to -40°C to +125°C. While it may function adequately in non-critical automotive auxiliary circuits, its reliability in primary power paths—especially under thermal cycling or extended high-temperature exposure—is not guaranteed without additional derating. Designers should consider environmental stress screening and validate long-term stability if deployed in automotive systems, particularly those exposed to cold-start conditions or engine bay temperatures exceeding 100°C.
What protection mechanisms does the SI-3011ZD incorporate, and how do they influence fault handling in real-world load scenarios?
The SI-3011ZD includes overcurrent and overtemperature protection features that actively limit damage during faults. The overcurrent protection typically engages around 4–5A based on similar Sanken devices, clamping current before internal damage occurs. Overtemperature shutdown activates near 150–160°C junction temperature, automatically disabling the output until thermal conditions normalize. These safeguards improve system robustness but may cause intermittent shutdowns under sustained overloads, requiring careful PCB layout and thermal design to avoid nuisance tripping during normal operation.
How should the enable pin be interfaced in a microcontroller-controlled system using the SI-3011ZD to ensure stable startup and shutdown sequencing?
The SI-3011ZD’s enable pin operates as a logic-level control input, accepting voltages above approximately 1.2V for active state. To interface with a 3.3V or 5V microcontroller GPIO, a pull-down resistor (e.g., 10kΩ) ensures safe default off-state, while the MCU can drive the pin high via open-drain or push-pull configuration. During startup, enabling after input stabilization prevents inrush current spikes; during shutdown, disabling before input voltage decay avoids reverse current flow through the regulator. Proper sequencing enhances reliability in battery-powered systems and reduces electromagnetic interference.
Is it feasible to parallel multiple SI-3011ZD units to increase output current capacity, and what challenges would arise?
Parallel operation of SI-3011ZD devices is theoretically possible but introduces significant challenges. Without built-in current sharing mechanisms, slight variations in threshold voltages or thermal gradients lead to uneven current distribution, potentially causing one unit to carry disproportionate current and overheat. Additionally, feedback loops become unstable due to interaction between regulators. External balancing resistors or active current-sharing ICs are required, increasing complexity and cost. For most applications, selecting a single higher-current regulator or switching topology is more practical and reliable.
What role does PSRR performance play in noise-sensitive analog subsystems powered by the SI-3011ZD, and how does it vary across frequency?
The SI-3011ZD exhibits a PSRR of 60dB at 100Hz–120Hz, indicating moderate rejection of line ripple and switching noise. However, PSRR degrades at higher frequencies, often dropping below 40dB beyond 1kHz due to internal compensation roll-off. In precision analog circuits such as data converters or RF front-ends, this limited high-frequency suppression may necessitate additional filtering—such as π-filters or ferrite beads—between the input source and the regulator. While sufficient for digital logic loads, standalone use near sensitive analog stages requires supplemental noise mitigation.
Given its TO-263-5 package, what are the soldering and assembly implications for the SI-3011ZD in automated production environments?
The SI-3011ZD uses the TO-263-5 package (also known as D²PAK with five leads), which features an exposed metal tab connected to the die pad. This requires proper solder wicking during reflow to ensure thermal and electrical continuity between the tab and the PCB ground plane. Manufacturers must verify adequate pad design and solder paste volume to avoid voids or insufficient wetting, which could compromise thermal performance and mechanical integrity. MSL Level 1 compliance allows unlimited floor life, simplifying inventory handling, but process controls must maintain consistent thermal profiles to prevent package delamination.
How does the SI-3011ZD’s adjustable output voltage feature affect feedback network selection, and what precision requirements apply?
The adjustable output of the SI-3011ZD relies on a resistor divider from output to the FB pin, with typical feedback reference voltage around 1.2V. To achieve accurate regulation within ±2%, resistors with 1% tolerance and low temperature coefficients (e.g., <10ppm/°C) are recommended. For a 3.3V output, standard values like Rtop = 2.49kΩ and Rbot = 1kΩ yield precise division ratios while minimizing bias current errors. Poor resistor selection introduces gain error and instability, particularly under light-load conditions where feedback loop dynamics change.
What substitution options exist for the SI-3011ZD, and how do alternatives like the SI-3011ZD-TL compare in terms of availability and compatibility?
The SI-3011ZD-TL is listed as a substitute, likely differing only in packaging or tape-and-reel format rather than electrical characteristics. Both share identical pinouts and performance parameters, making them electrically interchangeable. However, supply chain considerations favor whichever variant aligns with existing procurement practices or board assembly processes. Always verify latest manufacturer documentation, as substitution status can change due to product lifecycle updates. No other direct substitutes are officially listed, underscoring reliance on Sanken Electric USA Inc. for compatible replacements.
How does the SI-3011ZD handle transient load steps, and what capacitance requirements ensure stability?
The SI-3011ZD requires adequate output capacitance for stability, typically recommending 10µF minimum ceramic capacitor (X5R or X7R dielectric) at the output. This helps dampen transients and maintain phase margin under varying loads. During rapid current surges (e.g., from 1A to 3A), the regulator’s internal compensation must remain stable; adding a small ESR-like damping may be needed if using ultra-low-ESR capacitors exclusively. Input capacitance of 1–10µF is also advised to suppress input-side transients. Failure to meet these guidelines risks oscillation or excessive overshoot during dynamic load conditions.
In what scenarios would the SI-3011ZD be preferred over a switching regulator despite lower efficiency?
The SI-3011ZD is advantageous in noise-critical analog or RF applications where switching regulators introduce high-frequency EMI. Its inherently quiet conduction mode and clean output rail make it suitable for biasing sensors, PLLs, or communication interfaces. Additionally, in space-constrained systems where discrete components must minimize ripple and noise without complex filtering, the SI-3011ZD offers simplicity and predictability. When input-output differential is small (<1V) and heat dissipation is manageable, its linear behavior outweighs efficiency penalties.
How does the absence of a base product series designation affect traceability and future design migration for the SI-3011ZD?
Although the detailed description lists a Base Product Number (SI-3011), the series field is blank, suggesting the SI-3011ZD represents a singular device within a broader family. This lack of explicit series labeling implies potential discontinuation risks and reduced visibility into derivative products. Design teams should treat it as a unique part rather than part of an evolving line, factoring in obsolescence planning and avoiding over-reliance on undocumented enhancements or improvements available in related models.
What are the implications of the SI-3011ZD’s RoHS compliance and ECCN classification for global market deployment?
As a RoHS-compliant device with ECCN EAR99 and HTSUS 8542.39.0001, the SI-3011ZD meets EU environmental directives and is generally unrestricted under U.S. export regulations. It does not require special licensing for international shipment, facilitating use in consumer, industrial, and commercial electronics worldwide. Compliance simplifies supply chain logistics and avoids customs delays associated with controlled components, supporting agile manufacturing across regions.
How does the SI-3011ZD perform under light-load conditions, and what impact does its quiescent current have on battery life?
With a quiescent current of 1.5mA, the SI-3011ZD draws significant standby power compared to micropower LDOs. In a 3.3V system powered by a 3.7V Li-ion battery, this translates to ~5mW idle consumption, reducing effective battery life in sleep-mode dominated applications. While acceptable for always-on systems, this characteristic makes the SI-3011ZD less ideal for energy-harvesting or ultra-low-power IoT nodes where even microamps matter. Alternative regulators with nanoamp IQ should be considered in such contexts.
Can the SI-3011ZD be used in negative voltage reference generation, and if so, how?
The SI-3011ZD is designed as a positive adjustable regulator and cannot directly generate negative voltages. However, it can feed a negative charge pump or inverter circuit to create dual supplies. Alternatively, paired with a negative LDO or switching converter, it enables bipolar rails. Direct negative output is not supported due to internal architecture constraints; attempting to configure it otherwise risks damage or erratic behavior.
What layout recommendations reduce electromagnetic interference when using the SI-3011ZD in mixed-signal PCBs?
Minimize loop area between input and output capacitors, placing them close to the SI-3011ZD’s pins. Route feedback traces away from noisy signals and keep them short to prevent coupling. Ground the exposed tab directly to a solid ground plane with multiple vias to enhance thermal conductivity and reduce impedance. Separate analog and digital grounds at the regulator point to avoid return path interference, improving overall signal integrity.
How does the SI-3011ZD’s maximum input voltage of 6V constrain upstream power source design?
Operating above 6V input risks exceeding the SI-3011ZD’s absolute maximum rating, potentially damaging the device. This limits compatibility with unregulated sources like 9V wall adapters or automotive ignition lines without pre-regulation. Designers must ensure all possible input transients (e.g., load dump or brownout recovery) remain below 6V. Adding a simple series diode or Zener clamp may protect against brief overvoltage events, but sustained higher inputs require buck converters or voltage dividers with buffering.

Parts with Similar Specifications

The three parts on the right have similar specifications to Sanken SI-3011ZD

Product Attribute SI-3011ZD-TL SI-3011ZF-TL SI-3011ZF SI-3012KD
Part Number SI-3011ZD-TL SI-3011ZF-TL SI-3011ZF SI-3012KD
Manufacturer Sanken Sanken Sanken Sanken
Voltage - Output (Max) - - - -
Voltage - Output (Min/Fixed) - - - -
PSRR - - - -
Series - - - -
Output Configuration - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Output Type - Current - Unbuffered Voltage - Buffered -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Control Features - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Current - Quiescent (Iq) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Mounting Type - Surface Mount Through Hole Surface Mount
Current - Output - - - -
Voltage - Input (Max) - - - -
Voltage Dropout (Max) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Number of Regulators - - - -
Protection Features - - - -

SI-3011ZD Datasheet PDF

Download SI-3011ZD pdf datasheets and Sanken documentation for SI-3011ZD - Sanken.

Datasheets
SI-3000ZD Series.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
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SI-3011ZD Image

SI-3011ZD

Sanken
32D-SI-3011ZD

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