Key facts
- Brand
- STMicroelectronics
- Model
- ST1S40
- Category
- Power Management
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-10
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STMicroelectronics ST1S40 DC Step-Down Switching Regulator Datasheet
The ST1S40 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator designed for uP/ASIC/DSP/FPGA core and I/O supplies. It operates from a 4.0 V to 18 V input voltage range and regulates an output voltage as low as 0.8 V. The device integrates a 95 mΩ high-side switch and a 69 mΩ synchronous rectifier to achieve high efficiency with a minimum component count.
Read onlineSTMicroelectronics ST1S40 specifications
| Output current | 3 A |
|---|---|
| Input voltage range | 4.0 V to 18 V |
| Output voltage range | 0.8 V to Vin |
| Switching frequency | 850 kHz |
| High-side switch resistance | 95 mΩ |
| Low-side switch resistance | 69 mΩ |
| Maximum limiting current | 6.0 A |
| Operating junction temperature | -40 to 150 °C |
Source: STMicroelectronics ST1S40 DC Step-Down Switching Regulator Datasheet
All STMicroelectronics ST1S40 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the switching frequency of the ST1S40?
The ST1S40 operates at a switching frequency of 850 kHz.
From: STMicroelectronics ST1S40 DC Step-Down Switching Regulator Datasheet
What is the minimum output voltage?
The device can regulate an output voltage as low as 0.8 V.
From: STMicroelectronics ST1S40 DC Step-Down Switching Regulator Datasheet
What is the maximum output current of the STEVAL-ISA082V1?
The board supports a maximum output current of 4 A.
What is the input voltage range for the STEVAL-ISA082V1?
The device operates with an input voltage from 4 V to 18 V.
What is the input voltage range for this demonstration board?
The board operates with an input voltage between 4 V and 18 V.
What is the maximum output current this converter can deliver?
The device provides a maximum output current of 4 A.