STMicroelectronics ST1S40
3A DC stepdown switching regulator
The ST1S40 device is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.The ST1S40 integrates a 95 mΩ high side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. It is available in HSOP-8, VFQFPN 4 mm x 4 mm - 8 lead, and standard SO8 package.
Key features
- 3 A DC output current
- 4.0 V to 18 V input voltage
- Integrated 95 mΩ and 69 mΩ Power MOSFETs
- Current fold back short-circuit protection
Additional features
- 3 A DC output current
- 4.0 V to 18 V input voltage
- 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
- Enable
- Cycle-by-cycle current limiting
- Current fold back short-circuit protection
- Available in HSOP-8, VFQFPN4x4-8L, and SO8 packages
Applications
- Industrial power supplies
- P/ASIC/DSP/FPGA core and I/O supplies
- Point of load for: STB, TVs, DVD
- Optical storage, HD drive, printers, audio/graphic cards
Available tools
STEVAL-ISA084V1:
4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40
The STEVAL-ISA084V1, based on the ST1S40, is an internally compensated 800 kHz fixed-frequency PWM synchronous step-down converter demonstration board. The ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN (100% duty-cycle).
Do you have a Question?
Contact EBV
If you need any assistance, please click below to find your closest EBV sales office.
Related documents |