ST1S14PHR Regulator: Features, Applications and Datasheet
8 Terminals 5.5V 8-Pin ST1S14 DC DC Voltage Regulator SWITCHING REGULATOR 1 Outputs 850kHz Tape & Reel (TR) 8-SOIC (0.154, 3.90mm Width) Exposed Pad









8 Terminals 5.5V 8-Pin ST1S14 DC DC Voltage Regulator SWITCHING REGULATOR 1 Outputs 850kHz Tape & Reel (TR) 8-SOIC (0.154, 3.90mm Width) Exposed Pad
The STMicroelectronics ST1S14PHR is a step-down monolithic power switching regulator that can deliver up to 3 A DC current to the load depending on the application conditions. This article will introduce its features, applications and datasheet.
ST1S14PHR Description
The STMicroelectronics ST1S14PHR is a step-down monolithic power switching regulator that can deliver up to 3 A DC current to the load depending on the application conditions. It has an operating input voltage range from 5.5 V to 48 V and an adjustable output voltage from 1.22 V to 43.2 V2. It uses an internal N-channel DMOS transistor with a typical R DS (on) of 200 mΩ as the switching element to minimize the size of the external components1. It has an internal oscillator that fixes the switching frequency at 850 kHz. It also has some features such as internal soft-start, power good open collector output, current mode architecture, embedded compensation network, zero load current operation, internal current limiting, inhibit for zero current consumption, 2 mA maximum quiescent current over temperature range, and thermal shutdown. It comes in an HSOP8 package with exposed frame, which allows reducing the thermal resistance down to approximately 40 °C/W1234. It is suitable for automotive and industrial applications that require high efficiency and reliability.
ST1S14PHR Features
Internal soft-start: This feature allows the regulator to gradually increase the output voltage from zero to the nominal value, avoiding output voltage overshoot and reducing the input current surge .
Power good open collector output: This feature provides a signal that indicates when the output voltage is within the regulation range. It can be used for power sequencing or fault detection .
Current mode architecture: This feature enables fast transient response and easy loop compensation. The current mode control also provides inherent input voltage feed-forward, which improves the line regulation .
Embedded compensation network: This feature simplifies the design of the feedback loop by providing an internal compensation network that stabilizes the system without the need of external components .
Zero load current operation: This feature allows the regulator to operate with no load connected to the output, maintaining a regulated output voltage and drawing a very low quiescent current from the input .
Internal current limiting: This feature protects the regulator from overload and short-circuit conditions by limiting the output current to a safe value .
Inhibit for zero current consumption: This feature enables the regulator to be disabled by pulling the inhibit pin low, reducing the input current to less than 1 μA .
2 mA maximum quiescent current over temperature range: This feature ensures low power consumption and high efficiency even at light load conditions and over the entire operating temperature range .
Thermal shutdown: This feature protects the regulator from overheating by shutting down the switching element when the junction temperature exceeds a threshold .
Specifications
- TypeParameter
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
ACTIVE (Last Updated: 7 months ago) - Factory Lead Time11 Weeks
- Contact Plating
Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.
Tin - Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
8-SOIC (0.154, 3.90mm Width) Exposed Pad - Number of Pins8
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~125°C TJ - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tape & Reel (TR) - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e3 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations8
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
GULL WING - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
ST1S14 - Function
The parameter "Function" in electronic components refers to the specific role or purpose that the component serves within an electronic circuit. It defines how the component interacts with other elements, influences the flow of electrical signals, and contributes to the overall behavior of the system. Functions can include amplification, signal processing, switching, filtering, and energy storage, among others. Understanding the function of each component is essential for designing effective and efficient electronic systems.
Step-Down - Number of Outputs1
- Voltage - Input (Max)
Voltage - Input (Max) is a parameter in electronic components that specifies the maximum voltage that can be safely applied to the input of the component without causing damage. This parameter is crucial for ensuring the proper functioning and longevity of the component. Exceeding the maximum input voltage can lead to electrical overstress, which may result in permanent damage or failure of the component. It is important to carefully adhere to the specified maximum input voltage to prevent any potential issues and maintain the reliability of the electronic system.
48V - Output Voltage
Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.
1.22V - Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Adjustable - Max Output Current
The maximum current that can be supplied to the load.
3A - Operating Supply Voltage
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
48V - Voltage - Input (Min)
Voltage - Input (Min) refers to the minimum voltage level that an electronic component requires to operate correctly. It indicates the lowest voltage that can be applied to the component while still allowing it to function as intended. If the input voltage falls below this specified minimum, the component may not perform properly or may fail to operate altogether. This parameter is critical for ensuring reliable operation and longevity of the device in electronic circuits.
5.5V - Analog IC - Other Type
Analog IC - Other Type is a parameter used to categorize electronic components that are integrated circuits (ICs) designed for analog signal processing but do not fall into more specific subcategories such as amplifiers, comparators, or voltage regulators. These ICs may include specialized analog functions such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), voltage references, or signal conditioning circuits. They are typically used in various applications where precise analog signal processing is required, such as in audio equipment, instrumentation, communication systems, and industrial control systems. Manufacturers provide detailed specifications for these components to help engineers select the most suitable IC for their specific design requirements.
SWITCHING REGULATOR - Output Configuration
Output Configuration in electronic components refers to the arrangement or setup of the output pins or terminals of a device. It defines how the output signals are structured and how they interact with external circuits or devices. The output configuration can determine the functionality and compatibility of the component in a circuit design. Common types of output configurations include single-ended, differential, open-drain, and push-pull configurations, each serving different purposes and applications in electronic systems. Understanding the output configuration of a component is crucial for proper integration and operation within a circuit.
Positive - Max Output Voltage
The maximum output voltage refers to the dynamic area beyond which the output is saturated in the positive or negative direction, and is limited according to the load resistance value.
43.2V - Topology
In the context of electronic components, "topology" refers to the arrangement or configuration of the components within a circuit or system. It defines how the components are connected to each other and how signals flow between them. The choice of topology can significantly impact the performance, efficiency, and functionality of the electronic system. Common topologies include series, parallel, star, mesh, and hybrid configurations, each with its own advantages and limitations. Designers carefully select the appropriate topology based on the specific requirements of the circuit to achieve the desired performance and functionality.
Buck - Control Mode
In electronic components, "Control Mode" refers to the method or mode of operation used to regulate or control the behavior of the component. This parameter determines how the component responds to input signals or commands to achieve the desired output. The control mode can vary depending on the specific component and its intended function, such as voltage regulation, current limiting, or frequency modulation. Understanding the control mode of an electronic component is crucial for proper integration and operation within a circuit or system.
CURRENT-MODE - Frequency - Switching
"Frequency - Switching" in electronic components refers to the rate at which a device, such as a transistor or switching regulator, turns on and off during operation. This parameter is crucial in determining the efficiency and performance of power converters, oscillators, and other circuits that rely on rapid switching. Higher switching frequencies typically allow for smaller component sizes but may require more advanced design considerations to manage heat and electromagnetic interference.
850kHz - Control Technique
In electronic components, "Control Technique" refers to the method or approach used to regulate and manage the operation of the component. This parameter is crucial in determining how the component functions within a circuit or system. Different control techniques can include analog control, digital control, pulse-width modulation (PWM), and various feedback mechanisms. The choice of control technique can impact the performance, efficiency, and overall functionality of the electronic component. It is important to select the appropriate control technique based on the specific requirements and characteristics of the application in which the component will be used.
PULSE WIDTH MODULATION - Synchronous Rectifier
Synchronous rectification is a technique for improving the efficiency of rectification by replacing diodes with actively controlled switches, usually power MOSFETs or power bipolar junction transistors (BJT).
No - Min Output Voltage
Min Output Voltage refers to the lowest voltage level that an electronic component, such as a voltage regulator or power supply, can provide reliably under specified conditions. It indicates the minimum threshold required for proper operation of connected devices. Operating below this voltage may lead to device malfunction or failure to operate as intended.
1.22V - Height1.6mm
- Length5mm
- Width4mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
ST1S14PHR Pinout


ST1S14PHR CAD Model
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ST1S14PHR Applications
LED lighting: The ST1S14PHR can be used to power LED drivers that require a constant current and a wide input voltage range. The device can also provide dimming control by using the inhibit pin or the feedback pin.
Power management: The ST1S14PHR can be used to provide a regulated output voltage for various loads, such as microcontrollers, sensors, actuators, and communication modules. The device can also be used to implement power sequencing or fault detection by using the power good output.
Automation and process control: The ST1S14PHR can be used to power industrial equipment that operates in harsh environments, such as motors, pumps, valves, and solenoids. The device can also provide protection features, such as current limiting, thermal shutdown, and zero load operation.
ST1S14PHR Manufacturer
STMicroelectronics is a global leader in creating products and solutions for smart mobility, power and energy, and cloud-connected autonomous things. It has one of the industry’s broadest technology portfolios, covering analog, digital, mixed-signal, microcontrollers, memories, power devices, sensors, wireless, and security. It was founded in 1987 as a merger of SGS Microelettronica of Italy and Thomson Semiconducteurs of France. It is headquartered in Geneva, Switzerland, with legal registration in Amsterdam, Netherlands. It has operations in 35 countries and sales offices and distributors in more than 70 countries. It is committed to innovation, sustainability, and ethics in its business.
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsNumber of OutputsMax Output CurrentFrequency - SwitchingVoltage - Input (Min)Voltage - Input (Max)Min Output VoltageOutput VoltageMax Output VoltageVoltage - Output (Max)View Compare
ST1S14PHR
8-SOIC (0.154, 3.90mm Width) Exposed Pad
8
1
3 A
850kHz
5.5V
48V
1.22 V
1.22 V
43.2 V
43.2V
8-PowerSOIC (0.154, 3.90mm Width)
8
1
3 A
700kHz
4.5V
-
760 mV
7 V
7 V
7V
8-SOIC (0.154, 3.90mm Width)
8
1
3 A
1MHz
4.5V
18V
1.25 V
5 V
5 V
17.28V
8-PowerSOIC (0.154, 3.90mm Width)
8
1
3 A
700kHz
4.5V
-
760 mV
7 V
7 V
7V
8-PowerSOIC (0.154, 3.90mm Width)
8
1
3 A
700kHz
4.5V
-
760 mV
7 V
7 V
7V
Datasheet PDF
- Datasheets :
What is the ST1S14PHR?
The ST1S14PHR is a step-down monolithic power switching regulator that can deliver up to 3 A DC current to the load depending on the application conditions. It has an operating input voltage range from 5.5 V to 48 V and an adjustable output voltage from 1.22 V to 43.2 V2.
What is the package of the ST1S14PHR?
The ST1S14PHR comes in an HSOP8 package with exposed frame, which allows reducing the thermal resistance down to approximately 40 °C/W123 .
What are the common problems or failures of the ST1S14PHR?
Some common problems or failures of the ST1S14PHR are: Output voltage overshoot or undershoot: This can be caused by improper selection of the output capacitor, the feedback resistor, or the compensation network. To avoid this, it is recommended to follow the guidelines in the datasheet and use the eDesignSuite tool to design the circuit. Output voltage ripple or noise: This can be caused by parasitic inductance or resistance of the PCB traces, the input or output capacitors, or the feedback network. To reduce this, it is suggested to use low ESR capacitors, short and wide PCB traces, and proper grounding. Thermal shutdown or overheating: This can be caused by excessive power dissipation, high ambient temperature, or insufficient heat sinking. To prevent this, it is advised to calculate the power dissipation, check the junction temperature, and use adequate heat sinking.
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