Overview
The ST1S40IPUR is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator produced by STMicroelectronics. This regulator operates from an input voltage range of 4.0 V to 18 V and can regulate output voltages as low as 0.8 V up to the input voltage. It integrates a 95 mΩ high side switch and a 69 mΩ synchronous rectifier, enabling very high efficiency with very low output voltages. The ST1S40IPUR is available in a VFQFPN-8 package, making it suitable for a variety of applications requiring compact and efficient power management solutions.
Key Specifications
| Topology | Buck (Step Down) |
|---|---|
| Input Voltage | 4 V to 18 V |
| Output Current - Max | 3 A |
| Output Voltage Range | 0.8 V to 18 V |
| Switching Frequency - Max | 1 MHz (typical 850 kHz) |
| Package Style | VFQFPN-8 |
| Mounting Method | Surface Mount |
| No. of Pins | 8 Pins |
Key Features
- 3 A DC output current
- Input voltage range: 4.0 V to 18 V
- Output voltage adjustable from 0.8 V
- 850 kHz switching frequency
- Internal soft-start
- Integrated 95 mΩ and 69 mΩ Power MOSFETs
- All ceramic capacitor compatible
- Enable function
- Cycle-by-cycle current limiting
- Current fold back short-circuit protection
Applications
- μP/ASIC/DSP/FPGA core and I/O supplies
- Point of load for: STB, TVs, DVD
- Optical storage, hard disk drive, printers, audio/graphic cards
Q & A
- What is the input voltage range of the ST1S40IPUR?
The input voltage range of the ST1S40IPUR is from 4 V to 18 V.
- What is the maximum output current of the ST1S40IPUR?
The maximum output current of the ST1S40IPUR is 3 A.
- What is the switching frequency of the ST1S40IPUR?
The switching frequency of the ST1S40IPUR is typically 850 kHz, with a maximum of 1 MHz.
- What type of package is the ST1S40IPUR available in?
The ST1S40IPUR is available in a VFQFPN-8 package.
- Does the ST1S40IPUR have internal soft-start and current limiting features?
Yes, the ST1S40IPUR has internal soft-start and cycle-by-cycle current limiting features.
- What kind of protection does the ST1S40IPUR offer against short circuits?
The ST1S40IPUR offers current fold back short-circuit protection.
- Is the ST1S40IPUR compatible with all ceramic capacitors?
Yes, the ST1S40IPUR is compatible with all ceramic capacitors.
- What are some typical applications of the ST1S40IPUR?
Typical applications include μP/ASIC/DSP/FPGA core and I/O supplies, point of load for STB, TVs, DVD, optical storage, hard disk drive, printers, and audio/graphic cards.
- What is the RoHS compliance status of the ST1S40IPUR?
The ST1S40IPUR is RoHS compliant with an Ecopack2 grade.
- What is the operating temperature range of the ST1S40IPUR?
The operating temperature range of the ST1S40IPUR is not explicitly stated in the provided sources, but it is typically within the industrial temperature range for similar components.
