Overview
The ST1S10PUR is a high-efficiency step-down PWM current mode switching regulator produced by STMicroelectronics. This device is capable of providing up to 3 A of output current and operates with an input supply range from 2.5 V to 18 V. It offers an adjustable output voltage from 0.8 V (VFB) to 0.85 * VIN_SW [VOUT = VFB * (1 + R1/R2)]. The ST1S10PUR is designed for high switching frequencies, either at a fixed 900 kHz or synchronizable to an external clock from 400 kHz to 1.2 MHz, allowing the use of small SMD external components. It features an integrated synchronous rectifier, eliminating the need for a Schottky diode, and provides excellent transient response. The device is fully protected against thermal overheating, switching overcurrent, and output short-circuit, making it an ideal choice for point of load regulators or LDO pre-regulation.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Min | 2.7 V |
| Input Voltage Max | 18.0 V |
| Output Current | Up to 3 A |
| Operating Temperature Min | -25.0 °C |
| Operating Temperature Max | 125.0 °C |
| Switching Frequency | 900 kHz (fixed) or synchronizable from 400 kHz to 1.2 MHz |
| Output Voltage Adjustment | From 0.8 V (VFB) to 0.85 * VIN_SW [VOUT = VFB * (1 + R1/R2)] |
| Package Name | DFN8 4x4 |
| RoHS Compliance | Ecopack2 |
| Grade | Industrial |
| Packing Type | Tape And Reel |
Key Features
- Step-down current mode PWM regulator
- Output voltage adjustable from 0.8 V
- Input voltage from 2.5 V up to 18 V
- 2% DC output voltage tolerance
- Synchronous rectification
- Inhibit function
- Synchronizable switching frequency from 400 kHz up to 1.2 MHz
- Internal soft start
- Dynamic short-circuit protection
- Typical efficiency: 90%
- Standby supply current: max. 6 μA over temperature range
- Operative junction temperature: from -40 °C to 125 °C
Applications
The ST1S10PUR is suitable for various applications, including:
- Point of load regulators
- LDO pre-regulation
- Automotive systems
- Industrial power supplies
- High-efficiency DC-DC conversion in compact designs
Q & A
- What is the maximum output current of the ST1S10PUR?
The ST1S10PUR can provide up to 3 A of output current.
- What is the input voltage range of the ST1S10PUR?
The input voltage range is from 2.5 V to 18 V.
- How can the output voltage be adjusted?
The output voltage can be adjusted from 0.8 V (VFB) to 0.85 * VIN_SW [VOUT = VFB * (1 + R1/R2)].
- What is the switching frequency of the ST1S10PUR?
The switching frequency is 900 kHz (fixed) or synchronizable from 400 kHz to 1.2 MHz.
- Does the ST1S10PUR have built-in protection features?
Yes, it has protection against thermal overheating, switching overcurrent, and output short-circuit.
- What is the package type of the ST1S10PUR?
The package type is DFN8 4x4.
-
Yes, it is RoHS compliant with an Ecopack2 grade.
- What are the operating temperature ranges for the ST1S10PUR?
The operating temperature range is from -25.0 °C to 125.0 °C.
- What is the typical efficiency of the ST1S10PUR?
The typical efficiency is 90%.
- What is the standby supply current of the ST1S10PUR?
The standby supply current is a maximum of 6 μA over the temperature range.
